[PATCH 10/13] kvm/powerpc: Add support for Book3S processors in hypervisor mode
Alexander Graf
agraf at suse.de
Mon May 16 07:58:12 EST 2011
On 11.05.2011, at 12:44, Paul Mackerras wrote:
> This adds support for KVM running on 64-bit Book 3S processors,
> specifically POWER7, in hypervisor mode. Using hypervisor mode means
> that the guest can use the processor's supervisor mode. That means
> that the guest can execute privileged instructions and access privileged
> registers itself without trapping to the host. This gives excellent
> performance, but does mean that KVM cannot emulate a processor
> architecture other than the one that the hardware implements.
>
> This code assumes that the guest is running paravirtualized using the
> PAPR (Power Architecture Platform Requirements) interface, which is the
> interface that IBM's PowerVM hypervisor uses. That means that existing
> Linux distributions that run on IBM pSeries machines will also run
> under KVM without modification. In order to communicate the PAPR
> hypercalls to qemu, this adds a new KVM_EXIT_PAPR_HCALL exit code
> to include/linux/kvm.h.
>
> Currently the choice between book3s_hv support and book3s_pr support
> (i.e. the existing code, which runs the guest in user mode) has to be
> made at kernel configuration time, so a given kernel binary can only
> do one or the other.
>
> This new book3s_hv code doesn't support MMIO emulation at present.
> Since we are running paravirtualized guests, this isn't a serious
> restriction.
>
> With the guest running in supervisor mode, most exceptions go straight
> to the guest. We will never get data or instruction storage or segment
> interrupts, alignment interrupts, decrementer interrupts, program
> interrupts, single-step interrupts, etc., coming to the hypervisor from
> the guest. Therefore this introduces a new KVMTEST_NONHV macro for the
> exception entry path so that we don't have to do the KVM test on entry
> to those exception handlers.
>
> We do however get hypervisor decrementer, hypervisor data storage,
> hypervisor instruction storage, and hypervisor emulation assist
> interrupts, so we have to handle those.
>
> In hypervisor mode, real-mode accesses can access all of RAM, not just
> a limited amount. Therefore we put all the guest state in the vcpu.arch
> and use the shadow_vcpu in the PACA only for temporary scratch space.
> We allocate the vcpu with kzalloc rather than vzalloc, and we don't use
> anything in the kvmppc_vcpu_book3s struct, so we don't allocate it.
>
> The POWER7 processor has a restriction that all threads in a core have
> to be in the same partition. MMU-on kernel code counts as a partition
> (partition 0), so we have to do a partition switch on every entry to and
> exit from the guest. At present we require the host and guest to run
> in single-thread mode because of this hardware restriction.
>
> This code allocates a hashed page table for the guest and initializes
> it with HPTEs for the guest's Virtual Real Memory Area (VRMA). We
> require that the guest memory is allocated using 16MB huge pages, in
> order to simplify the low-level memory management. This also means that
> we can get away without tracking paging activity in the host for now,
> since huge pages can't be paged or swapped.
>
> Signed-off-by: Paul Mackerras <paulus at samba.org>
> ---
> arch/powerpc/include/asm/exception-64s.h | 27 +-
> arch/powerpc/include/asm/kvm_asm.h | 4 +
> arch/powerpc/include/asm/kvm_book3s.h | 148 ++++++-
> arch/powerpc/include/asm/kvm_book3s_asm.h | 4 +-
> arch/powerpc/include/asm/kvm_booke.h | 4 +
> arch/powerpc/include/asm/kvm_host.h | 60 +++-
> arch/powerpc/include/asm/kvm_ppc.h | 6 +
> arch/powerpc/include/asm/mmu-hash64.h | 10 +-
> arch/powerpc/include/asm/paca.h | 10 +
> arch/powerpc/include/asm/reg.h | 4 +
> arch/powerpc/kernel/asm-offsets.c | 95 ++++-
> arch/powerpc/kernel/exceptions-64s.S | 60 ++--
> arch/powerpc/kvm/Kconfig | 40 ++-
> arch/powerpc/kvm/Makefile | 16 +-
> arch/powerpc/kvm/book3s_64_mmu_hv.c | 258 +++++++++++
> arch/powerpc/kvm/book3s_hv.c | 413 ++++++++++++++++++
> arch/powerpc/kvm/book3s_hv_interrupts.S | 326 ++++++++++++++
> arch/powerpc/kvm/book3s_hv_rmhandlers.S | 663 +++++++++++++++++++++++++++++
> arch/powerpc/kvm/powerpc.c | 23 +-
> arch/powerpc/kvm/trace.h | 2 +-
> include/linux/kvm.h | 6 +
> 21 files changed, 2094 insertions(+), 85 deletions(-)
> create mode 100644 arch/powerpc/kvm/book3s_64_mmu_hv.c
> create mode 100644 arch/powerpc/kvm/book3s_hv.c
> create mode 100644 arch/powerpc/kvm/book3s_hv_interrupts.S
> create mode 100644 arch/powerpc/kvm/book3s_hv_rmhandlers.S
>
> diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h
> index 2a770d8..d32e1ef 100644
> --- a/arch/powerpc/include/asm/exception-64s.h
> +++ b/arch/powerpc/include/asm/exception-64s.h
> @@ -65,14 +65,14 @@
> GET_PACA(r13); \
> std r9,area+EX_R9(r13); /* save r9 - r12 */ \
> std r10,area+EX_R10(r13); \
> - mfcr r9; \
> - extra(vec); \
> - std r11,area+EX_R11(r13); \
> - std r12,area+EX_R12(r13); \
> BEGIN_FTR_SECTION_NESTED(66); \
> mfspr r10,SPRN_CFAR; \
> std r10,area+EX_CFAR(r13); \
> END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \
> + mfcr r9; \
> + extra(vec); \
> + std r11,area+EX_R11(r13); \
> + std r12,area+EX_R12(r13); \
I don't really understand that change :).
> GET_SCRATCH0(r10); \
> std r10,area+EX_R13(r13)
> #define EXCEPTION_PROLOG_1(area, extra, vec) \
> @@ -134,6 +134,17 @@ do_kvm_##n: \
> #define KVM_HANDLER_SKIP(area, h, n)
> #endif
>
> +#ifdef CONFIG_KVM_BOOK3S_NONHV
I really liked how you called the .c file _pr - why call it NONHV now?
> +#define KVMTEST_NONHV(n) __KVMTEST(n)
> +#define KVM_HANDLER_NONHV(area, h, n) __KVM_HANDLER(area, h, n)
> +#define KVM_HANDLER_NONHV_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n)
> +
> +#else
> +#define KVMTEST_NONHV(n)
> +#define KVM_HANDLER_NONHV(area, h, n)
> +#define KVM_HANDLER_NONHV_SKIP(area, h, n)
> +#endif
> +
> #define NOTEST(n)
>
> /*
> @@ -210,7 +221,7 @@ label##_pSeries: \
> HMT_MEDIUM; \
> SET_SCRATCH0(r13); /* save r13 */ \
> EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \
> - EXC_STD, KVMTEST, vec)
> + EXC_STD, KVMTEST_NONHV, vec)
>
> #define STD_EXCEPTION_HV(loc, vec, label) \
> . = loc; \
> @@ -227,8 +238,8 @@ label##_hv: \
> beq masked_##h##interrupt
> #define _SOFTEN_TEST(h) __SOFTEN_TEST(h)
>
> -#define SOFTEN_TEST(vec) \
> - KVMTEST(vec); \
> +#define SOFTEN_TEST_NONHV(vec) \
> + KVMTEST_NONHV(vec); \
> _SOFTEN_TEST(EXC_STD)
>
> #define SOFTEN_TEST_HV(vec) \
> @@ -248,7 +259,7 @@ label##_hv: \
> .globl label##_pSeries; \
> label##_pSeries: \
> _MASKABLE_EXCEPTION_PSERIES(vec, label, \
> - EXC_STD, SOFTEN_TEST)
> + EXC_STD, SOFTEN_TEST_NONHV)
>
> #define MASKABLE_EXCEPTION_HV(loc, vec, label) \
> . = loc; \
> diff --git a/arch/powerpc/include/asm/kvm_asm.h b/arch/powerpc/include/asm/kvm_asm.h
> index 0951b17..7b1f0e0 100644
> --- a/arch/powerpc/include/asm/kvm_asm.h
> +++ b/arch/powerpc/include/asm/kvm_asm.h
> @@ -64,8 +64,12 @@
> #define BOOK3S_INTERRUPT_PROGRAM 0x700
> #define BOOK3S_INTERRUPT_FP_UNAVAIL 0x800
> #define BOOK3S_INTERRUPT_DECREMENTER 0x900
> +#define BOOK3S_INTERRUPT_HV_DECREMENTER 0x980
> #define BOOK3S_INTERRUPT_SYSCALL 0xc00
> #define BOOK3S_INTERRUPT_TRACE 0xd00
> +#define BOOK3S_INTERRUPT_H_DATA_STORAGE 0xe00
> +#define BOOK3S_INTERRUPT_H_INST_STORAGE 0xe20
> +#define BOOK3S_INTERRUPT_H_EMUL_ASSIST 0xe40
> #define BOOK3S_INTERRUPT_PERFMON 0xf00
> #define BOOK3S_INTERRUPT_ALTIVEC 0xf20
> #define BOOK3S_INTERRUPT_VSX 0xf40
> diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h
> index 12829bb..5b76073 100644
> --- a/arch/powerpc/include/asm/kvm_book3s.h
> +++ b/arch/powerpc/include/asm/kvm_book3s.h
> @@ -117,6 +117,7 @@ extern void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 new_msr);
> extern void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr);
> extern void kvmppc_mmu_book3s_64_init(struct kvm_vcpu *vcpu);
> extern void kvmppc_mmu_book3s_32_init(struct kvm_vcpu *vcpu);
> +extern void kvmppc_mmu_book3s_hv_init(struct kvm_vcpu *vcpu);
> extern int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte);
> extern int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr);
> extern void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu);
> @@ -128,10 +129,12 @@ extern int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu);
> extern void kvmppc_mmu_invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
> extern int kvmppc_mmu_hpte_sysinit(void);
> extern void kvmppc_mmu_hpte_sysexit(void);
> +extern int kvmppc_mmu_hv_init(void);
>
> extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data);
> extern int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data);
> extern void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec);
> +extern void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags);
> extern void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat,
> bool upper, u32 val);
> extern void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr);
> @@ -152,6 +155,19 @@ static inline struct kvmppc_vcpu_book3s *to_book3s(struct kvm_vcpu *vcpu)
> return container_of(vcpu, struct kvmppc_vcpu_book3s, vcpu);
> }
>
> +extern void kvm_return_point(void);
> +
> +/* Also add subarch specific defines */
> +
> +#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
> +#include <asm/kvm_book3s_32.h>
> +#endif
> +#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
> +#include <asm/kvm_book3s_64.h>
> +#endif
> +
> +#ifdef CONFIG_KVM_BOOK3S_NONHV
> +
> #define vcpu_guest_state(vcpu) ((vcpu)->arch.shared)
>
> static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
> @@ -168,16 +184,6 @@ static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
> vcpu_guest_state(vcpu)->int_pending = 0;
> }
>
> -static inline ulong dsisr(void)
> -{
> - ulong r;
> - asm ( "mfdsisr %0 " : "=r" (r) );
> - return r;
> -}
> -
> -extern void kvm_return_point(void);
> -static inline struct kvmppc_book3s_shadow_vcpu *to_svcpu(struct kvm_vcpu *vcpu);
> -
> static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
> {
> if ( num < 14 ) {
> @@ -265,6 +271,11 @@ static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
> return to_svcpu(vcpu)->fault_dar;
> }
>
> +static inline ulong kvmppc_get_msr(struct kvm_vcpu *vcpu)
> +{
> + return vcpu->arch.shared->msr;
> +}
> +
> static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
> {
> ulong crit_raw = vcpu_guest_state(vcpu)->critical;
> @@ -284,6 +295,115 @@ static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
>
> return crit;
> }
> +#else /* CONFIG_KVM_BOOK3S_NONHV */
> +
> +#define vcpu_guest_state(vcpu) (&(vcpu)->arch)
> +
> +static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
> +{
> + return 0;
> +}
> +
> +static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
> + unsigned long pending_now, unsigned long old_pending)
> +{
> + /* Recalculate LPCR:MER based on the presence of
> + * a pending external interrupt
> + */
> + if (test_bit(BOOK3S_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions) ||
> + test_bit(BOOK3S_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions))
Wasn't pending_now pending_exceptions?
> + vcpu->arch.lpcr |= LPCR_MER;
> + else
> + vcpu->arch.lpcr &= ~((u64)LPCR_MER);
> +}
> +
> +static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
> +{
> + vcpu->arch.gpr[num] = val;
> +}
> +
> +static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
> +{
> + return vcpu->arch.gpr[num];
> +}
> +
> +static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
> +{
> + vcpu->arch.cr = val;
> +}
> +
> +static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
> +{
> + return vcpu->arch.cr;
> +}
> +
> +static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, u32 val)
> +{
> + vcpu->arch.xer = val;
> +}
> +
> +static inline u32 kvmppc_get_xer(struct kvm_vcpu *vcpu)
> +{
> + return vcpu->arch.xer;
> +}
> +
> +static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
> +{
> + vcpu->arch.ctr = val;
> +}
> +
> +static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
> +{
> + return vcpu->arch.ctr;
> +}
> +
> +static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
> +{
> + vcpu->arch.lr = val;
> +}
> +
> +static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
> +{
> + return vcpu->arch.lr;
> +}
> +
> +static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
> +{
> + vcpu->arch.pc = val;
> +}
> +
> +static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
> +{
> + return vcpu->arch.pc;
> +}
> +
> +static inline u32 kvmppc_get_last_inst(struct kvm_vcpu *vcpu)
> +{
> + ulong pc = kvmppc_get_pc(vcpu);
> +
> + /* Load the instruction manually if it failed to do so in the
> + * exit path */
> + if (vcpu->arch.last_inst == KVM_INST_FETCH_FAILED)
> + kvmppc_ld(vcpu, &pc, sizeof(u32), &vcpu->arch.last_inst, false);
> +
> + return vcpu->arch.last_inst;
> +}
> +
> +static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
> +{
> + return vcpu->arch.fault_dar;
> +}
> +
> +static inline ulong kvmppc_get_msr(struct kvm_vcpu *vcpu)
> +{
> + return vcpu->arch.msr;
> +}
> +
> +static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
> +{
> + return false;
> +}
> +#endif
>
> /* Magic register values loaded into r3 and r4 before the 'sc' assembly
> * instruction for the OSI hypercalls */
> @@ -292,12 +412,4 @@ static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
>
> #define INS_DCBZ 0x7c0007ec
>
> -/* Also add subarch specific defines */
> -
> -#ifdef CONFIG_PPC_BOOK3S_32
> -#include <asm/kvm_book3s_32.h>
> -#else
> -#include <asm/kvm_book3s_64.h>
> -#endif
> -
> #endif /* __ASM_KVM_BOOK3S_H__ */
> diff --git a/arch/powerpc/include/asm/kvm_book3s_asm.h b/arch/powerpc/include/asm/kvm_book3s_asm.h
> index d5a8a38..d7279f5 100644
> --- a/arch/powerpc/include/asm/kvm_book3s_asm.h
> +++ b/arch/powerpc/include/asm/kvm_book3s_asm.h
> @@ -61,6 +61,7 @@ kvmppc_resume_\intno:
> #else /*__ASSEMBLY__ */
>
> struct kvmppc_book3s_shadow_vcpu {
> +#ifdef CONFIG_KVM_BOOK3S_NONHV
Do you really want any shadow_vcpu in the paca at all?
> ulong gpr[14];
> u32 cr;
> u32 xer;
> @@ -72,6 +73,7 @@ struct kvmppc_book3s_shadow_vcpu {
> ulong pc;
> ulong shadow_srr1;
> ulong fault_dar;
> +#endif
>
> ulong host_r1;
> ulong host_r2;
> @@ -84,7 +86,7 @@ struct kvmppc_book3s_shadow_vcpu {
> #ifdef CONFIG_PPC_BOOK3S_32
> u32 sr[16]; /* Guest SRs */
> #endif
> -#ifdef CONFIG_PPC_BOOK3S_64
> +#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_NONHV)
> u8 slb_max; /* highest used guest slb entry */
> struct {
> u64 esid;
> diff --git a/arch/powerpc/include/asm/kvm_booke.h b/arch/powerpc/include/asm/kvm_booke.h
> index 9c9ba3d..a90e091 100644
> --- a/arch/powerpc/include/asm/kvm_booke.h
> +++ b/arch/powerpc/include/asm/kvm_booke.h
> @@ -93,4 +93,8 @@ static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
> return vcpu->arch.fault_dear;
> }
>
> +static inline ulong kvmppc_get_msr(struct kvm_vcpu *vcpu)
> +{
> + return vcpu->arch.shared->msr;
> +}
> #endif /* __ASM_KVM_BOOKE_H__ */
> diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
> index 3ebe51b..ec62365 100644
> --- a/arch/powerpc/include/asm/kvm_host.h
> +++ b/arch/powerpc/include/asm/kvm_host.h
> @@ -33,7 +33,9 @@
> /* memory slots that does not exposed to userspace */
> #define KVM_PRIVATE_MEM_SLOTS 4
>
> +#ifdef CONFIG_KVM_MMIO
> #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
> +#endif
>
> /* We don't currently support large pages. */
> #define KVM_HPAGE_GFN_SHIFT(x) 0
> @@ -133,7 +135,24 @@ struct kvmppc_exit_timing {
> };
> };
>
> +struct kvmppc_pginfo {
> + unsigned long pfn;
> + atomic_t refcnt;
> +};
> +
> struct kvm_arch {
> + unsigned long hpt_virt;
> + unsigned long ram_npages;
> + unsigned long ram_psize;
> + unsigned long ram_porder;
> + struct kvmppc_pginfo *ram_pginfo;
> + unsigned int lpid;
> + unsigned int host_lpid;
> + unsigned long host_lpcr;
> + unsigned long sdr1;
> + unsigned long host_sdr1;
> + int tlbie_lock;
> + unsigned short last_vcpu[NR_CPUS];
This should all be #ifdef CONFIG_KVM_BOOK3S_HV
> };
>
> struct kvmppc_pte {
> @@ -190,7 +209,7 @@ struct kvm_vcpu_arch {
> ulong rmcall;
> ulong host_paca_phys;
> struct kvmppc_slb slb[64];
> - int slb_max; /* # valid entries in slb[] */
> + int slb_max; /* 1 + index of last valid entry in slb[] */
> int slb_nr; /* total number of entries in SLB */
> struct kvmppc_mmu mmu;
> #endif
> @@ -204,9 +223,10 @@ struct kvm_vcpu_arch {
> vector128 vr[32];
> vector128 vscr;
> #endif
> + u32 vrsave;
>
> #ifdef CONFIG_VSX
> - u64 vsr[32];
> + u64 vsr[64];
> #endif
>
> #ifdef CONFIG_PPC_BOOK3S
> @@ -214,29 +234,45 @@ struct kvm_vcpu_arch {
> u32 qpr[32];
> #endif
>
> -#ifdef CONFIG_BOOKE
> - ulong pc;
> ulong ctr;
> ulong lr;
>
> ulong xer;
> u32 cr;
> -#endif
> +
> + ulong pc;
> + ulong msr;
>
> #ifdef CONFIG_PPC_BOOK3S
> ulong shadow_msr;
> ulong hflags;
> ulong guest_owned_ext;
> + ulong purr;
> + ulong spurr;
> + ulong lpcr;
> + ulong dscr;
> + ulong amr;
> + ulong uamor;
> + u32 ctrl;
> + u32 dsisr;
> + ulong dabr;
> #endif
> u32 mmucr;
> + ulong sprg0;
> + ulong sprg1;
> + ulong sprg2;
> + ulong sprg3;
> ulong sprg4;
> ulong sprg5;
> ulong sprg6;
> ulong sprg7;
> + ulong srr0;
> + ulong srr1;
> ulong csrr0;
> ulong csrr1;
> ulong dsrr0;
> ulong dsrr1;
> + ulong dear;
> ulong esr;
> u32 dec;
> u32 decar;
> @@ -259,6 +295,9 @@ struct kvm_vcpu_arch {
> u32 dbcr1;
> u32 dbsr;
>
> + u64 mmcr[3];
> + u32 pmc[6];
> +
> #ifdef CONFIG_KVM_EXIT_TIMING
> struct kvmppc_exit_timing timing_exit;
> struct kvmppc_exit_timing timing_last_enter;
> @@ -272,8 +311,12 @@ struct kvm_vcpu_arch {
> struct dentry *debugfs_exit_timing;
> #endif
>
> +#ifdef CONFIG_PPC_BOOK3S
> + ulong fault_dar;
> + u32 fault_dsisr;
> +#endif
> +
> #ifdef CONFIG_BOOKE
> - u32 last_inst;
> ulong fault_dear;
> ulong fault_esr;
> ulong queued_dear;
> @@ -288,13 +331,18 @@ struct kvm_vcpu_arch {
> u8 dcr_is_write;
> u8 osi_needed;
> u8 osi_enabled;
> + u8 hcall_needed;
>
> u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */
>
> struct hrtimer dec_timer;
> struct tasklet_struct tasklet;
> u64 dec_jiffies;
> + u64 dec_expires;
> unsigned long pending_exceptions;
> + u16 last_cpu;
> + u32 last_inst;
> + int trap;
> struct kvm_vcpu_arch_shared *shared;
> unsigned long magic_page_pa; /* phys addr to map the magic page to */
> unsigned long magic_page_ea; /* effect. addr to map the magic page to */
> diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h
> index 3210911..cd9ad96 100644
> --- a/arch/powerpc/include/asm/kvm_ppc.h
> +++ b/arch/powerpc/include/asm/kvm_ppc.h
> @@ -110,6 +110,12 @@ extern void kvmppc_booke_exit(void);
> extern void kvmppc_core_destroy_mmu(struct kvm_vcpu *vcpu);
> extern int kvmppc_kvm_pv(struct kvm_vcpu *vcpu);
>
> +extern long kvmppc_alloc_hpt(struct kvm *kvm);
> +extern void kvmppc_free_hpt(struct kvm *kvm);
> +extern long kvmppc_prepare_vrma(struct kvm *kvm,
> + struct kvm_userspace_memory_region *mem);
> +extern void kvmppc_map_vrma(struct kvm *kvm,
> + struct kvm_userspace_memory_region *mem);
> extern int kvmppc_core_init_vm(struct kvm *kvm);
> extern void kvmppc_core_destroy_vm(struct kvm *kvm);
> extern int kvmppc_core_prepare_memory_region(struct kvm *kvm,
> diff --git a/arch/powerpc/include/asm/mmu-hash64.h b/arch/powerpc/include/asm/mmu-hash64.h
> index ae7b3ef..0bb3fc1 100644
> --- a/arch/powerpc/include/asm/mmu-hash64.h
> +++ b/arch/powerpc/include/asm/mmu-hash64.h
> @@ -90,13 +90,19 @@ extern char initial_stab[];
>
> #define HPTE_R_PP0 ASM_CONST(0x8000000000000000)
> #define HPTE_R_TS ASM_CONST(0x4000000000000000)
> +#define HPTE_R_KEY_HI ASM_CONST(0x3000000000000000)
> #define HPTE_R_RPN_SHIFT 12
> -#define HPTE_R_RPN ASM_CONST(0x3ffffffffffff000)
> -#define HPTE_R_FLAGS ASM_CONST(0x00000000000003ff)
> +#define HPTE_R_RPN ASM_CONST(0x0ffffffffffff000)
> #define HPTE_R_PP ASM_CONST(0x0000000000000003)
> #define HPTE_R_N ASM_CONST(0x0000000000000004)
> +#define HPTE_R_G ASM_CONST(0x0000000000000008)
> +#define HPTE_R_M ASM_CONST(0x0000000000000010)
> +#define HPTE_R_I ASM_CONST(0x0000000000000020)
> +#define HPTE_R_W ASM_CONST(0x0000000000000040)
> +#define HPTE_R_WIMG ASM_CONST(0x0000000000000078)
> #define HPTE_R_C ASM_CONST(0x0000000000000080)
> #define HPTE_R_R ASM_CONST(0x0000000000000100)
> +#define HPTE_R_KEY_LO ASM_CONST(0x0000000000000e00)
>
> #define HPTE_V_1TB_SEG ASM_CONST(0x4000000000000000)
> #define HPTE_V_VRMA_MASK ASM_CONST(0x4001ffffff000000)
> diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h
> index 7412676..8dba5f6 100644
> --- a/arch/powerpc/include/asm/paca.h
> +++ b/arch/powerpc/include/asm/paca.h
> @@ -149,6 +149,16 @@ struct paca_struct {
> #ifdef CONFIG_KVM_BOOK3S_HANDLER
> /* We use this to store guest state in */
> struct kvmppc_book3s_shadow_vcpu shadow_vcpu;
> +#ifdef CONFIG_KVM_BOOK3S_64_HV
> + struct kvm_vcpu *kvm_vcpu;
> + u64 dabr;
> + u64 host_mmcr[3];
> + u32 host_pmc[6];
> + u64 host_purr;
> + u64 host_spurr;
> + u64 host_dscr;
> + u64 dec_expires;
Hrm. I'd say either push those into shadow_vcpu for HV mode or get rid of the shadow_vcpu reference. I'd probably prefer the former.
> +#endif
> #endif
> };
>
> diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
> index c07b7be..0036977 100644
> --- a/arch/powerpc/include/asm/reg.h
> +++ b/arch/powerpc/include/asm/reg.h
> @@ -189,6 +189,10 @@
> #define SPRN_CTR 0x009 /* Count Register */
> #define SPRN_DSCR 0x11
> #define SPRN_CFAR 0x1c /* Come From Address Register */
> +#define SPRN_AMR 0x1d /* Authority Mask Register */
> +#define SPRN_UAMOR 0x9d /* User Authority Mask Override Register */
> +#define SPRN_AMOR 0x15d /* Authority Mask Override Register */
> +#define SPRN_RWMR 885
> #define SPRN_CTRLF 0x088
> #define SPRN_CTRLT 0x098
> #define CTRL_CT 0xc0000000 /* current thread */
> diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
> index 6887661..49e97fd 100644
> --- a/arch/powerpc/kernel/asm-offsets.c
> +++ b/arch/powerpc/kernel/asm-offsets.c
> @@ -187,6 +187,7 @@ int main(void)
> DEFINE(LPPACASRR1, offsetof(struct lppaca, saved_srr1));
> DEFINE(LPPACAANYINT, offsetof(struct lppaca, int_dword.any_int));
> DEFINE(LPPACADECRINT, offsetof(struct lppaca, int_dword.fields.decr_int));
> + DEFINE(LPPACA_PMCINUSE, offsetof(struct lppaca, pmcregs_in_use));
> DEFINE(LPPACA_DTLIDX, offsetof(struct lppaca, dtl_idx));
> DEFINE(PACA_DTL_RIDX, offsetof(struct paca_struct, dtl_ridx));
> #endif /* CONFIG_PPC_STD_MMU_64 */
> @@ -200,9 +201,17 @@ int main(void)
> DEFINE(PACA_TRAP_SAVE, offsetof(struct paca_struct, trap_save));
> #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
> DEFINE(PACA_KVM_SVCPU, offsetof(struct paca_struct, shadow_vcpu));
> - DEFINE(SVCPU_SLB, offsetof(struct kvmppc_book3s_shadow_vcpu, slb));
> - DEFINE(SVCPU_SLB_MAX, offsetof(struct kvmppc_book3s_shadow_vcpu, slb_max));
> +#ifdef CONFIG_KVM_BOOK3S_64_HV
> + DEFINE(PACA_KVM_VCPU, offsetof(struct paca_struct, kvm_vcpu));
> + DEFINE(PACA_HOST_MMCR, offsetof(struct paca_struct, host_mmcr));
> + DEFINE(PACA_HOST_PMC, offsetof(struct paca_struct, host_pmc));
> + DEFINE(PACA_HOST_PURR, offsetof(struct paca_struct, host_purr));
> + DEFINE(PACA_HOST_SPURR, offsetof(struct paca_struct, host_spurr));
> + DEFINE(PACA_HOST_DSCR, offsetof(struct paca_struct, host_dscr));
> + DEFINE(PACA_DABR, offsetof(struct paca_struct, dabr));
> + DEFINE(PACA_KVM_DECEXP, offsetof(struct paca_struct, dec_expires));
> #endif
> +#endif /* CONFIG_KVM_BOOK3S_64_HANDLER */
> #endif /* CONFIG_PPC64 */
>
> /* RTAS */
> @@ -396,6 +405,28 @@ int main(void)
> DEFINE(VCPU_HOST_STACK, offsetof(struct kvm_vcpu, arch.host_stack));
> DEFINE(VCPU_HOST_PID, offsetof(struct kvm_vcpu, arch.host_pid));
> DEFINE(VCPU_GPRS, offsetof(struct kvm_vcpu, arch.gpr));
> + DEFINE(VCPU_FPRS, offsetof(struct kvm_vcpu, arch.fpr));
> + DEFINE(VCPU_FPSCR, offsetof(struct kvm_vcpu, arch.fpscr));
> +#ifdef CONFIG_ALTIVEC
> + DEFINE(VCPU_VRS, offsetof(struct kvm_vcpu, arch.vr));
> + DEFINE(VCPU_VSCR, offsetof(struct kvm_vcpu, arch.vscr));
> +#endif
> +#ifdef CONFIG_VSX
> + DEFINE(VCPU_VSRS, offsetof(struct kvm_vcpu, arch.vsr));
> +#endif
> + DEFINE(VCPU_VRSAVE, offsetof(struct kvm_vcpu, arch.vrsave));
> + DEFINE(VCPU_XER, offsetof(struct kvm_vcpu, arch.xer));
> + DEFINE(VCPU_CTR, offsetof(struct kvm_vcpu, arch.ctr));
> + DEFINE(VCPU_LR, offsetof(struct kvm_vcpu, arch.lr));
> + DEFINE(VCPU_CR, offsetof(struct kvm_vcpu, arch.cr));
> + DEFINE(VCPU_PC, offsetof(struct kvm_vcpu, arch.pc));
> + DEFINE(VCPU_MSR, offsetof(struct kvm_vcpu, arch.msr));
> + DEFINE(VCPU_SRR0, offsetof(struct kvm_vcpu, arch.srr0));
> + DEFINE(VCPU_SRR1, offsetof(struct kvm_vcpu, arch.srr1));
> + DEFINE(VCPU_SPRG0, offsetof(struct kvm_vcpu, arch.sprg0));
> + DEFINE(VCPU_SPRG1, offsetof(struct kvm_vcpu, arch.sprg1));
> + DEFINE(VCPU_SPRG2, offsetof(struct kvm_vcpu, arch.sprg2));
> + DEFINE(VCPU_SPRG3, offsetof(struct kvm_vcpu, arch.sprg3));
> DEFINE(VCPU_SPRG4, offsetof(struct kvm_vcpu, arch.sprg4));
> DEFINE(VCPU_SPRG5, offsetof(struct kvm_vcpu, arch.sprg5));
> DEFINE(VCPU_SPRG6, offsetof(struct kvm_vcpu, arch.sprg6));
> @@ -406,16 +437,65 @@ int main(void)
>
> /* book3s */
> #ifdef CONFIG_PPC_BOOK3S
> + DEFINE(KVM_LPID, offsetof(struct kvm, arch.lpid));
> + DEFINE(KVM_SDR1, offsetof(struct kvm, arch.sdr1));
> + DEFINE(KVM_HOST_LPID, offsetof(struct kvm, arch.host_lpid));
> + DEFINE(KVM_HOST_LPCR, offsetof(struct kvm, arch.host_lpcr));
> + DEFINE(KVM_HOST_SDR1, offsetof(struct kvm, arch.host_sdr1));
> + DEFINE(KVM_TLBIE_LOCK, offsetof(struct kvm, arch.tlbie_lock));
> + DEFINE(KVM_ONLINE_CPUS, offsetof(struct kvm, online_vcpus.counter));
> + DEFINE(KVM_LAST_VCPU, offsetof(struct kvm, arch.last_vcpu));
> + DEFINE(VCPU_KVM, offsetof(struct kvm_vcpu, kvm));
> + DEFINE(VCPU_VCPUID, offsetof(struct kvm_vcpu, vcpu_id));
> DEFINE(VCPU_HOST_RETIP, offsetof(struct kvm_vcpu, arch.host_retip));
> DEFINE(VCPU_HOST_MSR, offsetof(struct kvm_vcpu, arch.host_msr));
> DEFINE(VCPU_SHADOW_MSR, offsetof(struct kvm_vcpu, arch.shadow_msr));
> + DEFINE(VCPU_PURR, offsetof(struct kvm_vcpu, arch.purr));
> + DEFINE(VCPU_SPURR, offsetof(struct kvm_vcpu, arch.spurr));
> + DEFINE(VCPU_DSCR, offsetof(struct kvm_vcpu, arch.dscr));
> + DEFINE(VCPU_AMR, offsetof(struct kvm_vcpu, arch.amr));
> + DEFINE(VCPU_UAMOR, offsetof(struct kvm_vcpu, arch.uamor));
> + DEFINE(VCPU_CTRL, offsetof(struct kvm_vcpu, arch.ctrl));
> + DEFINE(VCPU_DABR, offsetof(struct kvm_vcpu, arch.dabr));
> DEFINE(VCPU_TRAMPOLINE_LOWMEM, offsetof(struct kvm_vcpu, arch.trampoline_lowmem));
> DEFINE(VCPU_TRAMPOLINE_ENTER, offsetof(struct kvm_vcpu, arch.trampoline_enter));
> DEFINE(VCPU_HIGHMEM_HANDLER, offsetof(struct kvm_vcpu, arch.highmem_handler));
> DEFINE(VCPU_RMCALL, offsetof(struct kvm_vcpu, arch.rmcall));
> DEFINE(VCPU_HFLAGS, offsetof(struct kvm_vcpu, arch.hflags));
> + DEFINE(VCPU_DSISR, offsetof(struct kvm_vcpu, arch.dsisr));
> + DEFINE(VCPU_DAR, offsetof(struct kvm_vcpu, arch.dear));
> + DEFINE(VCPU_DEC, offsetof(struct kvm_vcpu, arch.dec));
> + DEFINE(VCPU_DEC_EXPIRES, offsetof(struct kvm_vcpu, arch.dec_expires));
> + DEFINE(VCPU_LPCR, offsetof(struct kvm_vcpu, arch.lpcr));
> + DEFINE(VCPU_MMCR, offsetof(struct kvm_vcpu, arch.mmcr));
> + DEFINE(VCPU_PMC, offsetof(struct kvm_vcpu, arch.pmc));
> + DEFINE(VCPU_SLB, offsetof(struct kvm_vcpu, arch.slb));
> + DEFINE(VCPU_SLB_MAX, offsetof(struct kvm_vcpu, arch.slb_max));
> + DEFINE(VCPU_LAST_CPU, offsetof(struct kvm_vcpu, arch.last_cpu));
> + DEFINE(VCPU_FAULT_DSISR, offsetof(struct kvm_vcpu, arch.fault_dsisr));
> + DEFINE(VCPU_FAULT_DAR, offsetof(struct kvm_vcpu, arch.fault_dar));
> + DEFINE(VCPU_LAST_INST, offsetof(struct kvm_vcpu, arch.last_inst));
> + DEFINE(VCPU_TRAP, offsetof(struct kvm_vcpu, arch.trap));
> DEFINE(VCPU_SVCPU, offsetof(struct kvmppc_vcpu_book3s, shadow_vcpu) -
> offsetof(struct kvmppc_vcpu_book3s, vcpu));
> + DEFINE(SVCPU_HOST_R1, offsetof(struct kvmppc_book3s_shadow_vcpu, host_r1));
> + DEFINE(SVCPU_HOST_R2, offsetof(struct kvmppc_book3s_shadow_vcpu, host_r2));
> + DEFINE(SVCPU_SCRATCH0, offsetof(struct kvmppc_book3s_shadow_vcpu,
> + scratch0));
> + DEFINE(SVCPU_SCRATCH1, offsetof(struct kvmppc_book3s_shadow_vcpu,
> + scratch1));
> + DEFINE(SVCPU_IN_GUEST, offsetof(struct kvmppc_book3s_shadow_vcpu,
> + in_guest));
> + DEFINE(VCPU_SLB_E, offsetof(struct kvmppc_slb, orige));
> + DEFINE(VCPU_SLB_V, offsetof(struct kvmppc_slb, origv));
> + DEFINE(VCPU_SLB_SIZE, sizeof(struct kvmppc_slb));
> +#ifdef CONFIG_KVM_BOOK3S_NONHV
> +#ifdef CONFIG_PPC64
> + DEFINE(SVCPU_SLB, offsetof(struct kvmppc_book3s_shadow_vcpu, slb));
> + DEFINE(SVCPU_SLB_MAX, offsetof(struct kvmppc_book3s_shadow_vcpu, slb_max));
> +#endif
> + DEFINE(SVCPU_VMHANDLER, offsetof(struct kvmppc_book3s_shadow_vcpu,
> + vmhandler));
> DEFINE(SVCPU_CR, offsetof(struct kvmppc_book3s_shadow_vcpu, cr));
> DEFINE(SVCPU_XER, offsetof(struct kvmppc_book3s_shadow_vcpu, xer));
> DEFINE(SVCPU_CTR, offsetof(struct kvmppc_book3s_shadow_vcpu, ctr));
> @@ -435,16 +515,6 @@ int main(void)
> DEFINE(SVCPU_R11, offsetof(struct kvmppc_book3s_shadow_vcpu, gpr[11]));
> DEFINE(SVCPU_R12, offsetof(struct kvmppc_book3s_shadow_vcpu, gpr[12]));
> DEFINE(SVCPU_R13, offsetof(struct kvmppc_book3s_shadow_vcpu, gpr[13]));
> - DEFINE(SVCPU_HOST_R1, offsetof(struct kvmppc_book3s_shadow_vcpu, host_r1));
> - DEFINE(SVCPU_HOST_R2, offsetof(struct kvmppc_book3s_shadow_vcpu, host_r2));
> - DEFINE(SVCPU_VMHANDLER, offsetof(struct kvmppc_book3s_shadow_vcpu,
> - vmhandler));
> - DEFINE(SVCPU_SCRATCH0, offsetof(struct kvmppc_book3s_shadow_vcpu,
> - scratch0));
> - DEFINE(SVCPU_SCRATCH1, offsetof(struct kvmppc_book3s_shadow_vcpu,
> - scratch1));
> - DEFINE(SVCPU_IN_GUEST, offsetof(struct kvmppc_book3s_shadow_vcpu,
> - in_guest));
> DEFINE(SVCPU_FAULT_DSISR, offsetof(struct kvmppc_book3s_shadow_vcpu,
> fault_dsisr));
> DEFINE(SVCPU_FAULT_DAR, offsetof(struct kvmppc_book3s_shadow_vcpu,
> @@ -453,6 +523,7 @@ int main(void)
> last_inst));
> DEFINE(SVCPU_SHADOW_SRR1, offsetof(struct kvmppc_book3s_shadow_vcpu,
> shadow_srr1));
> +#endif /* CONFIG_KVM_BOOK3S_NONHV */
> #ifdef CONFIG_PPC_BOOK3S_32
> DEFINE(SVCPU_SR, offsetof(struct kvmppc_book3s_shadow_vcpu, sr));
> #endif
> diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
> index cbdf374..80c6456 100644
> --- a/arch/powerpc/kernel/exceptions-64s.S
> +++ b/arch/powerpc/kernel/exceptions-64s.S
> @@ -87,14 +87,14 @@ data_access_not_stab:
> END_MMU_FTR_SECTION_IFCLR(MMU_FTR_SLB)
> #endif
> EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, data_access_common, EXC_STD,
> - KVMTEST, 0x300)
> + KVMTEST_NONHV, 0x300)
>
> . = 0x380
> .globl data_access_slb_pSeries
> data_access_slb_pSeries:
> HMT_MEDIUM
> SET_SCRATCH0(r13)
> - EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST, 0x380)
> + EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST_NONHV, 0x380)
> std r3,PACA_EXSLB+EX_R3(r13)
> mfspr r3,SPRN_DAR
> #ifdef __DISABLED__
> @@ -125,7 +125,7 @@ data_access_slb_pSeries:
> instruction_access_slb_pSeries:
> HMT_MEDIUM
> SET_SCRATCH0(r13)
> - EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST, 0x480)
> + EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST_NONHV, 0x480)
> std r3,PACA_EXSLB+EX_R3(r13)
> mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */
> #ifdef __DISABLED__
> @@ -153,32 +153,32 @@ instruction_access_slb_pSeries:
> hardware_interrupt_pSeries:
> hardware_interrupt_hv:
> BEGIN_FTR_SECTION
> - _MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt,
> - EXC_STD, SOFTEN_TEST)
> - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x500)
> - FTR_SECTION_ELSE
> _MASKABLE_EXCEPTION_PSERIES(0x502, hardware_interrupt,
> EXC_HV, SOFTEN_TEST_HV)
> KVM_HANDLER(PACA_EXGEN, EXC_HV, 0x502)
> - ALT_FTR_SECTION_END_IFCLR(CPU_FTR_HVMODE_206)
> + FTR_SECTION_ELSE
> + _MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt,
> + EXC_STD, SOFTEN_TEST_NONHV)
> + KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x500)
> + ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE_206)
>
> STD_EXCEPTION_PSERIES(0x600, 0x600, alignment)
> - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x600)
> + KVM_HANDLER_NONHV(PACA_EXGEN, EXC_STD, 0x600)
>
> STD_EXCEPTION_PSERIES(0x700, 0x700, program_check)
> - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x700)
> + KVM_HANDLER_NONHV(PACA_EXGEN, EXC_STD, 0x700)
>
> STD_EXCEPTION_PSERIES(0x800, 0x800, fp_unavailable)
> - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x800)
> + KVM_HANDLER_NONHV(PACA_EXGEN, EXC_STD, 0x800)
>
> MASKABLE_EXCEPTION_PSERIES(0x900, 0x900, decrementer)
> MASKABLE_EXCEPTION_HV(0x980, 0x982, decrementer)
>
> STD_EXCEPTION_PSERIES(0xa00, 0xa00, trap_0a)
> - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xa00)
> + KVM_HANDLER_NONHV(PACA_EXGEN, EXC_STD, 0xa00)
>
> STD_EXCEPTION_PSERIES(0xb00, 0xb00, trap_0b)
> - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xb00)
> + KVM_HANDLER_NONHV(PACA_EXGEN, EXC_STD, 0xb00)
>
> . = 0xc00
> .globl system_call_pSeries
> @@ -219,7 +219,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE)
> b .
>
> STD_EXCEPTION_PSERIES(0xd00, 0xd00, single_step)
> - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xd00)
> + KVM_HANDLER_NONHV(PACA_EXGEN, EXC_STD, 0xd00)
>
> /* At 0xe??? we have a bunch of hypervisor exceptions, we branch
> * out of line to handle them
> @@ -254,23 +254,23 @@ vsx_unavailable_pSeries_1:
>
> #ifdef CONFIG_CBE_RAS
> STD_EXCEPTION_HV(0x1200, 0x1202, cbe_system_error)
> - KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1202)
> + KVM_HANDLER_NONHV_SKIP(PACA_EXGEN, EXC_HV, 0x1202)
> #endif /* CONFIG_CBE_RAS */
>
> STD_EXCEPTION_PSERIES(0x1300, 0x1300, instruction_breakpoint)
> - KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x1300)
> + KVM_HANDLER_NONHV_SKIP(PACA_EXGEN, EXC_STD, 0x1300)
>
> #ifdef CONFIG_CBE_RAS
> STD_EXCEPTION_HV(0x1600, 0x1602, cbe_maintenance)
> - KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1602)
> + KVM_HANDLER_NONHV_SKIP(PACA_EXGEN, EXC_HV, 0x1602)
> #endif /* CONFIG_CBE_RAS */
>
> STD_EXCEPTION_PSERIES(0x1700, 0x1700, altivec_assist)
> - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x1700)
> + KVM_HANDLER_NONHV(PACA_EXGEN, EXC_STD, 0x1700)
>
> #ifdef CONFIG_CBE_RAS
> STD_EXCEPTION_HV(0x1800, 0x1802, cbe_thermal)
> - KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1802)
> + KVM_HANDLER_NONHV_SKIP(PACA_EXGEN, EXC_HV, 0x1802)
> #endif /* CONFIG_CBE_RAS */
>
> . = 0x3000
> @@ -297,7 +297,7 @@ data_access_check_stab:
> mfspr r9,SPRN_DSISR
> srdi r10,r10,60
> rlwimi r10,r9,16,0x20
> -#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
> +#ifdef CONFIG_KVM_BOOK3S_NONHV
> lbz r9,PACA_KVM_SVCPU+SVCPU_IN_GUEST(r13)
> rlwimi r10,r9,8,0x300
> #endif
> @@ -316,11 +316,11 @@ do_stab_bolted_pSeries:
> EXCEPTION_PROLOG_PSERIES_1(.do_stab_bolted, EXC_STD)
> #endif /* CONFIG_POWER4_ONLY */
>
> - KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x300)
> - KVM_HANDLER_SKIP(PACA_EXSLB, EXC_STD, 0x380)
> - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x400)
> - KVM_HANDLER(PACA_EXSLB, EXC_STD, 0x480)
> - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x900)
> + KVM_HANDLER_NONHV_SKIP(PACA_EXGEN, EXC_STD, 0x300)
> + KVM_HANDLER_NONHV_SKIP(PACA_EXSLB, EXC_STD, 0x380)
> + KVM_HANDLER_NONHV(PACA_EXGEN, EXC_STD, 0x400)
> + KVM_HANDLER_NONHV(PACA_EXSLB, EXC_STD, 0x480)
> + KVM_HANDLER_NONHV(PACA_EXGEN, EXC_STD, 0x900)
> KVM_HANDLER(PACA_EXGEN, EXC_HV, 0x982)
>
> .align 7
> @@ -337,11 +337,11 @@ do_stab_bolted_pSeries:
>
> /* moved from 0xf00 */
> STD_EXCEPTION_PSERIES(., 0xf00, performance_monitor)
> - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xf00)
> + KVM_HANDLER_NONHV(PACA_EXGEN, EXC_STD, 0xf00)
> STD_EXCEPTION_PSERIES(., 0xf20, altivec_unavailable)
> - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xf20)
> + KVM_HANDLER_NONHV(PACA_EXGEN, EXC_STD, 0xf20)
> STD_EXCEPTION_PSERIES(., 0xf40, vsx_unavailable)
> - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xf40)
> + KVM_HANDLER_NONHV(PACA_EXGEN, EXC_STD, 0xf40)
>
> /*
> * An interrupt came in while soft-disabled; clear EE in SRR1,
> @@ -418,7 +418,11 @@ slb_miss_user_pseries:
> /* KVM's trampoline code needs to be close to the interrupt handlers */
>
> #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
> +#ifdef CONFIG_KVM_BOOK3S_NONHV
> #include "../kvm/book3s_rmhandlers.S"
> +#else
> +#include "../kvm/book3s_hv_rmhandlers.S"
> +#endif
> #endif
>
> .align 7
> diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
> index b7baff7..6ff191b 100644
> --- a/arch/powerpc/kvm/Kconfig
> +++ b/arch/powerpc/kvm/Kconfig
> @@ -20,7 +20,6 @@ config KVM
> bool
> select PREEMPT_NOTIFIERS
> select ANON_INODES
> - select KVM_MMIO
>
> config KVM_BOOK3S_HANDLER
> bool
> @@ -28,16 +27,22 @@ config KVM_BOOK3S_HANDLER
> config KVM_BOOK3S_32_HANDLER
> bool
> select KVM_BOOK3S_HANDLER
> + select KVM_MMIO
>
> config KVM_BOOK3S_64_HANDLER
> bool
> select KVM_BOOK3S_HANDLER
>
> +config KVM_BOOK3S_NONHV
> + bool
> + select KVM_MMIO
> +
> config KVM_BOOK3S_32
> tristate "KVM support for PowerPC book3s_32 processors"
> depends on EXPERIMENTAL && PPC_BOOK3S_32 && !SMP && !PTE_64BIT
> select KVM
> select KVM_BOOK3S_32_HANDLER
> + select KVM_BOOK3S_NONHV
> ---help---
> Support running unmodified book3s_32 guest kernels
> in virtual machines on book3s_32 host processors.
> @@ -48,10 +53,38 @@ config KVM_BOOK3S_32
> If unsure, say N.
>
> config KVM_BOOK3S_64
> - tristate "KVM support for PowerPC book3s_64 processors"
> + bool
> + select KVM_BOOK3S_64_HANDLER
> +
> +config KVM_BOOK3S_64_HV
> + bool "KVM support for POWER7 using hypervisor mode in host"
> depends on EXPERIMENTAL && PPC_BOOK3S_64
> select KVM
> - select KVM_BOOK3S_64_HANDLER
> + select KVM_BOOK3S_64
> + ---help---
> + Support running unmodified book3s_64 guest kernels in
> + virtual machines on POWER7 processors that have hypervisor
> + mode available to the host.
> +
> + If you say Y here, KVM will use the hardware virtualization
> + facilities of POWER7 (and later) processors, meaning that
> + guest operating systems will run at full hardware speed
> + using supervisor and user modes. However, this also means
> + that KVM is not usable under PowerVM (pHyp), is only usable
> + on POWER7 (or later) processors, and can only emulate
> + POWER5+, POWER6 and POWER7 processors.
> +
> + This module provides access to the hardware capabilities through
> + a character device node named /dev/kvm.
> +
> + If unsure, say N.
> +
> +config KVM_BOOK3S_64_NONHV
> + tristate "KVM support for PowerPC book3s_64 processors"
> + depends on EXPERIMENTAL && PPC_BOOK3S_64 && !KVM_BOOK3S_64_HV
> + select KVM
> + select KVM_BOOK3S_64
> + select KVM_BOOK3S_NONHV
> ---help---
> Support running unmodified book3s_64 and book3s_32 guest kernels
> in virtual machines on book3s_64 host processors.
> @@ -65,6 +98,7 @@ config KVM_440
> bool "KVM support for PowerPC 440 processors"
> depends on EXPERIMENTAL && 44x
> select KVM
> + select KVM_MMIO
e500 should also select MMIO, no?
> ---help---
> Support running unmodified 440 guest kernels in virtual machines on
> 440 host processors.
> diff --git a/arch/powerpc/kvm/Makefile b/arch/powerpc/kvm/Makefile
> index bf9854f..37c1a60 100644
> --- a/arch/powerpc/kvm/Makefile
> +++ b/arch/powerpc/kvm/Makefile
> @@ -14,7 +14,7 @@ CFLAGS_emulate.o := -I.
>
> common-objs-y += powerpc.o emulate.o
> obj-$(CONFIG_KVM_EXIT_TIMING) += timing.o
> -obj-$(CONFIG_KVM_BOOK3S_HANDLER) += book3s_exports.o
> +obj-$(CONFIG_KVM_BOOK3S_NONHV) += book3s_exports.o
>
> AFLAGS_booke_interrupts.o := -I$(obj)
>
> @@ -38,7 +38,7 @@ kvm-e500-objs := \
> e500_emulate.o
> kvm-objs-$(CONFIG_KVM_E500) := $(kvm-e500-objs)
>
> -kvm-book3s_64-objs := \
> +kvm-book3s_64_nonhv-objs := \
> $(common-objs-y) \
> fpu.o \
> book3s_paired_singles.o \
> @@ -50,7 +50,17 @@ kvm-book3s_64-objs := \
> book3s_64_mmu_host.o \
> book3s_64_mmu.o \
> book3s_32_mmu.o
> -kvm-objs-$(CONFIG_KVM_BOOK3S_64) := $(kvm-book3s_64-objs)
> +kvm-objs-$(CONFIG_KVM_BOOK3S_64_NONHV) := $(kvm-book3s_64_nonhv-objs)
> +
> +kvm-book3s_64_hv-objs := \
> + ../../../virt/kvm/kvm_main.o \
> + powerpc.o \
> + emulate.o \
> + book3s.o \
> + book3s_hv.o \
> + book3s_hv_interrupts.o \
> + book3s_64_mmu_hv.o
> +kvm-objs-$(CONFIG_KVM_BOOK3S_64_HV) := $(kvm-book3s_64_hv-objs)
>
> kvm-book3s_32-objs := \
> $(common-objs-y) \
> diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c
> new file mode 100644
> index 0000000..52d1be1
> --- /dev/null
> +++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
> @@ -0,0 +1,258 @@
> +/*
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License, version 2, as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
> + *
> + * Copyright 2010 Paul Mackerras, IBM Corp. <paulus at au1.ibm.com>
> + */
> +
> +#include <linux/types.h>
> +#include <linux/string.h>
> +#include <linux/kvm.h>
> +#include <linux/kvm_host.h>
> +#include <linux/highmem.h>
> +#include <linux/gfp.h>
> +#include <linux/slab.h>
> +#include <linux/hugetlb.h>
> +
> +#include <asm/tlbflush.h>
> +#include <asm/kvm_ppc.h>
> +#include <asm/kvm_book3s.h>
> +#include <asm/mmu-hash64.h>
> +#include <asm/hvcall.h>
> +#include <asm/synch.h>
> +#include <asm/ppc-opcode.h>
> +#include <asm/cputable.h>
> +
> +/* For now use fixed-size 16MB page table */
> +#define HPT_ORDER 24
> +#define HPT_NPTEG (1ul << (HPT_ORDER - 7)) /* 128B per pteg */
> +#define HPT_HASH_MASK (HPT_NPTEG - 1)
> +
> +/* Pages in the VRMA are 16MB pages */
> +#define VRMA_PAGE_ORDER 24
> +#define VRMA_VSID 0x1ffffffUL /* 1TB VSID reserved for VRMA */
> +
> +#define NR_LPIDS 1024
> +unsigned long lpid_inuse[BITS_TO_LONGS(NR_LPIDS)];
> +
> +long kvmppc_alloc_hpt(struct kvm *kvm)
> +{
> + unsigned long hpt;
> + unsigned long lpid;
> +
> + hpt = __get_free_pages(GFP_KERNEL|__GFP_ZERO|__GFP_REPEAT|__GFP_NOWARN,
> + HPT_ORDER - PAGE_SHIFT);
This would end up failing quite often, no?
> + if (!hpt) {
> + pr_err("kvm_alloc_hpt: Couldn't alloc HPT\n");
> + return -ENOMEM;
> + }
> + kvm->arch.hpt_virt = hpt;
> +
> + do {
> + lpid = find_first_zero_bit(lpid_inuse, NR_LPIDS);
> + if (lpid >= NR_LPIDS) {
> + pr_err("kvm_alloc_hpt: No LPIDs free\n");
> + free_pages(hpt, HPT_ORDER - PAGE_SHIFT);
> + return -ENOMEM;
> + }
> + } while (test_and_set_bit(lpid, lpid_inuse));
> +
> + kvm->arch.sdr1 = __pa(hpt) | (HPT_ORDER - 18);
> + kvm->arch.lpid = lpid;
> + kvm->arch.host_sdr1 = mfspr(SPRN_SDR1);
> + kvm->arch.host_lpid = mfspr(SPRN_LPID);
> + kvm->arch.host_lpcr = mfspr(SPRN_LPCR);
How do these correlate with the guest's hv mmu? I'd like to keep the code clean enough so we can potentially use it for PR mode as well :).
> +
> + pr_info("KVM guest htab at %lx, LPID %lx\n", hpt, lpid);
> + return 0;
> +}
> +
> +void kvmppc_free_hpt(struct kvm *kvm)
> +{
> + unsigned long i;
> + struct kvmppc_pginfo *pginfo;
> +
> + clear_bit(kvm->arch.lpid, lpid_inuse);
> + free_pages(kvm->arch.hpt_virt, HPT_ORDER - PAGE_SHIFT);
> +
> + if (kvm->arch.ram_pginfo) {
> + pginfo = kvm->arch.ram_pginfo;
> + kvm->arch.ram_pginfo = NULL;
> + for (i = 0; i < kvm->arch.ram_npages; ++i)
> + put_page(pfn_to_page(pginfo[i].pfn));
> + kfree(pginfo);
> + }
> +}
> +
> +static unsigned long user_page_size(unsigned long addr)
> +{
> + struct vm_area_struct *vma;
> + unsigned long size = PAGE_SIZE;
> +
> + down_read(¤t->mm->mmap_sem);
> + vma = find_vma(current->mm, addr);
> + if (vma)
> + size = vma_kernel_pagesize(vma);
> + up_read(¤t->mm->mmap_sem);
> + return size;
> +}
> +
> +static pfn_t hva_to_pfn(unsigned long addr)
> +{
> + struct page *page[1];
> + int npages;
> +
> + might_sleep();
> +
> + npages = get_user_pages_fast(addr, 1, 1, page);
> +
> + if (unlikely(npages != 1))
> + return 0;
> +
> + return page_to_pfn(page[0]);
> +}
> +
> +long kvmppc_prepare_vrma(struct kvm *kvm,
> + struct kvm_userspace_memory_region *mem)
> +{
> + unsigned long psize, porder;
> + unsigned long i, npages;
> + struct kvmppc_pginfo *pginfo;
> + pfn_t pfn;
> + unsigned long hva;
> +
> + /* First see what page size we have */
> + psize = user_page_size(mem->userspace_addr);
> + /* For now, only allow 16MB pages */
The reason to go for 16MB pages is because of the host mmu code, not the guest hv mmu. So please at least #ifdef the code to HV so we document that correlation.
> + if (psize != 1ul << VRMA_PAGE_ORDER || (mem->memory_size & (psize - 1))) {
> + pr_err("bad psize=%lx memory_size=%llx @ %llx\n",
> + psize, mem->memory_size, mem->userspace_addr);
> + return -EINVAL;
> + }
> + porder = __ilog2(psize);
> +
> + npages = mem->memory_size >> porder;
> + pginfo = kzalloc(npages * sizeof(struct kvmppc_pginfo), GFP_KERNEL);
> + if (!pginfo) {
> + pr_err("kvmppc_prepare_vrma: couldn't alloc %lu bytes\n",
> + npages * sizeof(struct kvmppc_pginfo));
> + return -ENOMEM;
> + }
> +
> + for (i = 0; i < npages; ++i) {
> + hva = mem->userspace_addr + (i << porder);
> + if (user_page_size(hva) != psize)
> + goto err;
> + pfn = hva_to_pfn(hva);
> + if (pfn == 0) {
> + pr_err("oops, no pfn for hva %lx\n", hva);
> + goto err;
> + }
> + if (pfn & ((1ul << (porder - PAGE_SHIFT)) - 1)) {
> + pr_err("oops, unaligned pfn %llx\n", pfn);
> + put_page(pfn_to_page(pfn));
> + goto err;
> + }
> + pginfo[i].pfn = pfn;
> + }
> +
> + kvm->arch.ram_npages = npages;
> + kvm->arch.ram_psize = psize;
> + kvm->arch.ram_porder = porder;
> + kvm->arch.ram_pginfo = pginfo;
> +
> + return 0;
> +
> + err:
> + kfree(pginfo);
> + return -EINVAL;
> +}
> +
> +void kvmppc_map_vrma(struct kvm *kvm, struct kvm_userspace_memory_region *mem)
> +{
> + unsigned long i;
> + unsigned long npages = kvm->arch.ram_npages;
> + unsigned long pfn;
> + unsigned long *hpte;
> + unsigned long hash;
> + struct kvmppc_pginfo *pginfo = kvm->arch.ram_pginfo;
> +
> + if (!pginfo)
> + return;
> +
> + /* VRMA can't be > 1TB */
> + if (npages > 1ul << (40 - kvm->arch.ram_porder))
> + npages = 1ul << (40 - kvm->arch.ram_porder);
> + /* Can't use more than 1 HPTE per HPTEG */
> + if (npages > HPT_NPTEG)
> + npages = HPT_NPTEG;
> +
> + for (i = 0; i < npages; ++i) {
> + pfn = pginfo[i].pfn;
> + /* can't use hpt_hash since va > 64 bits */
> + hash = (i ^ (VRMA_VSID ^ (VRMA_VSID << 25))) & HPT_HASH_MASK;
> + /*
> + * We assume that the hash table is empty and no
> + * vcpus are using it at this stage. Since we create
> + * at most one HPTE per HPTEG, we just assume entry 7
> + * is available and use it.
> + */
> + hpte = (unsigned long *) (kvm->arch.hpt_virt + (hash << 7));
> + hpte += 7 * 2;
> + /* HPTE low word - RPN, protection, etc. */
> + hpte[1] = (pfn << PAGE_SHIFT) | HPTE_R_R | HPTE_R_C |
> + HPTE_R_M | PP_RWXX;
> + wmb();
> + hpte[0] = HPTE_V_1TB_SEG | (VRMA_VSID << (40 - 16)) |
> + (i << (VRMA_PAGE_ORDER - 16)) | HPTE_V_BOLTED |
> + HPTE_V_LARGE | HPTE_V_VALID;
> + }
> +}
> +
> +int kvmppc_mmu_hv_init(void)
> +{
> + if (!cpu_has_feature(CPU_FTR_HVMODE_206))
> + return 0;
Return 0 for "it doesn't work" might not be the right exit code ;).
> + memset(lpid_inuse, 0, sizeof(lpid_inuse));
> + set_bit(mfspr(SPRN_LPID), lpid_inuse);
> + set_bit(NR_LPIDS - 1, lpid_inuse);
> +
> + return 0;
> +}
> +
> +void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
> +{
> +}
> +
> +static void kvmppc_mmu_book3s_64_hv_reset_msr(struct kvm_vcpu *vcpu)
> +{
> + kvmppc_set_msr(vcpu, MSR_SF | MSR_ME);
> +}
> +
> +static int kvmppc_mmu_book3s_64_hv_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
> + struct kvmppc_pte *gpte, bool data)
> +{
> + return -ENOENT;
Can't you just call the normal book3s_64 mmu code here? Without xlate, doing ppc_ld doesn't work, which means that reading out the faulting guest instruction breaks. We'd also need it for PR mode :).
> +}
> +
> +void kvmppc_mmu_book3s_hv_init(struct kvm_vcpu *vcpu)
> +{
> + struct kvmppc_mmu *mmu = &vcpu->arch.mmu;
> +
> + vcpu->arch.slb_nr = 32; /* Assume POWER7 for now */
> +
> + mmu->xlate = kvmppc_mmu_book3s_64_hv_xlate;
> + mmu->reset_msr = kvmppc_mmu_book3s_64_hv_reset_msr;
> +
> + vcpu->arch.hflags |= BOOK3S_HFLAG_SLB;
> +}
> diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
> new file mode 100644
> index 0000000..f6b7cd1
> --- /dev/null
> +++ b/arch/powerpc/kvm/book3s_hv.c
> @@ -0,0 +1,413 @@
> +/*
> + * Copyright 2011 Paul Mackerras, IBM Corp. <paulus at au1.ibm.com>
> + * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
> + *
> + * Authors:
> + * Paul Mackerras <paulus at au1.ibm.com>
> + * Alexander Graf <agraf at suse.de>
> + * Kevin Wolf <mail at kevin-wolf.de>
> + *
> + * Description: KVM functions specific to running on Book 3S
> + * processors in hypervisor mode (specifically POWER7 and later).
> + *
> + * This file is derived from arch/powerpc/kvm/book3s.c,
> + * by Alexander Graf <agraf at suse.de>.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License, version 2, as
> + * published by the Free Software Foundation.
> + */
> +
> +#include <linux/kvm_host.h>
> +#include <linux/err.h>
> +#include <linux/slab.h>
> +#include <linux/preempt.h>
> +#include <linux/sched.h>
> +#include <linux/delay.h>
> +#include <linux/fs.h>
> +#include <linux/anon_inodes.h>
> +
> +#include <asm/reg.h>
> +#include <asm/cputable.h>
> +#include <asm/cacheflush.h>
> +#include <asm/tlbflush.h>
> +#include <asm/uaccess.h>
> +#include <asm/io.h>
> +#include <asm/kvm_ppc.h>
> +#include <asm/kvm_book3s.h>
> +#include <asm/mmu_context.h>
> +#include <asm/lppaca.h>
> +#include <asm/processor.h>
> +#include <linux/gfp.h>
> +#include <linux/sched.h>
> +#include <linux/vmalloc.h>
> +#include <linux/highmem.h>
> +
> +/* #define EXIT_DEBUG */
> +/* #define EXIT_DEBUG_SIMPLE */
> +/* #define EXIT_DEBUG_INT */
> +
> +void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
> +{
> + local_paca->kvm_vcpu = vcpu;
> + vcpu->cpu = cpu;
> +}
> +
> +void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
> +{
> + vcpu->cpu = -1;
> +}
> +
> +void kvmppc_vcpu_block(struct kvm_vcpu *vcpu)
> +{
> + u64 now;
> + unsigned long dec_nsec;
> +
> + now = get_tb();
> + if (now >= vcpu->arch.dec_expires && !kvmppc_core_pending_dec(vcpu))
> + kvmppc_core_queue_dec(vcpu);
> + if (vcpu->arch.pending_exceptions)
> + return;
> + if (vcpu->arch.dec_expires != ~(u64)0) {
> + dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC /
> + tb_ticks_per_sec;
> + hrtimer_start(&vcpu->arch.dec_timer, ktime_set(0, dec_nsec),
> + HRTIMER_MODE_REL);
> + }
> +
> + kvm_vcpu_block(vcpu);
> + vcpu->stat.halt_wakeup++;
> +
> + if (vcpu->arch.dec_expires != ~(u64)0)
> + hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
> +}
> +
> +void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
> +{
> + vcpu->arch.msr = msr;
> +}
> +
> +void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr)
> +{
> + vcpu->arch.pvr = pvr;
> + kvmppc_mmu_book3s_hv_init(vcpu);
No need for you to do it depending on pvr. You can just do the mmu initialization on normal init :).
> +}
> +
> +void kvmppc_dump_regs(struct kvm_vcpu *vcpu)
> +{
> + int r;
> +
> + pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id);
> + pr_err("pc = %.16lx msr = %.16lx trap = %x\n",
> + vcpu->arch.pc, vcpu->arch.msr, vcpu->arch.trap);
> + for (r = 0; r < 16; ++r)
> + pr_err("r%2d = %.16lx r%d = %.16lx\n",
> + r, kvmppc_get_gpr(vcpu, r),
> + r+16, kvmppc_get_gpr(vcpu, r+16));
> + pr_err("ctr = %.16lx lr = %.16lx\n",
> + vcpu->arch.ctr, vcpu->arch.lr);
> + pr_err("srr0 = %.16lx srr1 = %.16lx\n",
> + vcpu->arch.srr0, vcpu->arch.srr1);
> + pr_err("sprg0 = %.16lx sprg1 = %.16lx\n",
> + vcpu->arch.sprg0, vcpu->arch.sprg1);
> + pr_err("sprg2 = %.16lx sprg3 = %.16lx\n",
> + vcpu->arch.sprg2, vcpu->arch.sprg3);
> + pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n",
> + vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.dsisr);
> + pr_err("dar = %.16lx\n", vcpu->arch.dear);
> + pr_err("fault dar = %.16lx dsisr = %.8x\n",
> + vcpu->arch.fault_dar, vcpu->arch.fault_dsisr);
> + pr_err("SLB (%d entries):\n", vcpu->arch.slb_max);
> + for (r = 0; r < vcpu->arch.slb_max; ++r)
> + pr_err(" ESID = %.16llx VSID = %.16llx\n",
> + vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv);
> + pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n",
> + vcpu->arch.lpcr, vcpu->kvm->arch.sdr1,
> + vcpu->arch.last_inst);
> +}
> +
> +static int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
> + struct task_struct *tsk)
> +{
> + int r = RESUME_HOST;
> +
> + vcpu->stat.sum_exits++;
> +
> + run->exit_reason = KVM_EXIT_UNKNOWN;
> + run->ready_for_interrupt_injection = 1;
> + switch (vcpu->arch.trap) {
> + /* We're good on these - the host merely wanted to get our attention */
> + case BOOK3S_INTERRUPT_HV_DECREMENTER:
> + vcpu->stat.dec_exits++;
> + r = RESUME_GUEST;
> + break;
> + case BOOK3S_INTERRUPT_EXTERNAL:
> + vcpu->stat.ext_intr_exits++;
> + r = RESUME_GUEST;
> + break;
> + case BOOK3S_INTERRUPT_PERFMON:
> + r = RESUME_GUEST;
> + break;
> + case BOOK3S_INTERRUPT_PROGRAM:
> + {
> + ulong flags;
> + /*
> + * Normally program interrupts are delivered directly
> + * to the guest by the hardware, but we can get here
> + * as a result of a hypervisor emulation interrupt
> + * (e40) getting turned into a 700 by BML RTAS.
Not sure I fully understand what's going on there. Mind to explain? :)
> + */
> + flags = vcpu->arch.msr & 0x1f0000ull;
> + kvmppc_core_queue_program(vcpu, flags);
> + r = RESUME_GUEST;
> + break;
> + }
> + case BOOK3S_INTERRUPT_SYSCALL:
> + {
> + /* hcall - punt to userspace */
> + int i;
> +
Do we really want to accept sc from pr=1? I'd just reject them straight away.
> + run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3);
> + for (i = 0; i < 9; ++i)
> + run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i);
> + run->exit_reason = KVM_EXIT_PAPR_HCALL;
> + vcpu->arch.hcall_needed = 1;
> + r = RESUME_HOST;
> + break;
> + }
> + case BOOK3S_INTERRUPT_H_DATA_STORAGE:
> + vcpu->arch.dsisr = vcpu->arch.fault_dsisr;
> + vcpu->arch.dear = vcpu->arch.fault_dar;
> + kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE, 0);
> + r = RESUME_GUEST;
> + break;
> + case BOOK3S_INTERRUPT_H_INST_STORAGE:
> + kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_INST_STORAGE,
> + 0x08000000);
What do these do? I thought the guest gets DSI and ISI directly?
> + r = RESUME_GUEST;
> + break;
> + case BOOK3S_INTERRUPT_H_EMUL_ASSIST:
> + kvmppc_core_queue_program(vcpu, 0x80000);
> + r = RESUME_GUEST;
> + break;
> + default:
> + kvmppc_dump_regs(vcpu);
> + printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%lx\n",
> + vcpu->arch.trap, kvmppc_get_pc(vcpu), vcpu->arch.msr);
> + r = RESUME_HOST;
> + BUG();
> + break;
> + }
> +
> +
> + if (!(r & RESUME_HOST)) {
> + /* To avoid clobbering exit_reason, only check for signals if
> + * we aren't already exiting to userspace for some other
> + * reason. */
> + if (signal_pending(tsk)) {
> + vcpu->stat.signal_exits++;
> + run->exit_reason = KVM_EXIT_INTR;
> + r = -EINTR;
> + } else {
> + kvmppc_core_deliver_interrupts(vcpu);
> + }
> + }
> +
> + return r;
> +}
> +
> +int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
> + struct kvm_sregs *sregs)
> +{
> + int i;
> +
> + sregs->pvr = vcpu->arch.pvr;
> +
> + memset(sregs, 0, sizeof(struct kvm_sregs));
> + for (i = 0; i < vcpu->arch.slb_max; i++) {
> + sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige;
> + sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
> + }
> +
> + return 0;
> +}
> +
> +int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
> + struct kvm_sregs *sregs)
> +{
> + int i, j;
> +
> + kvmppc_set_pvr(vcpu, sregs->pvr);
> +
> + j = 0;
> + for (i = 0; i < vcpu->arch.slb_nr; i++) {
> + if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) {
> + vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe;
> + vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv;
> + ++j;
> + }
> + }
> + vcpu->arch.slb_max = j;
> +
> + return 0;
> +}
> +
> +int kvmppc_core_check_processor_compat(void)
> +{
> + if (cpu_has_feature(CPU_FTR_HVMODE_206))
> + return 0;
> + return -EIO;
> +}
> +
> +struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
> +{
> + struct kvm_vcpu *vcpu;
> + int err = -ENOMEM;
> + unsigned long lpcr;
> +
> + vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL);
> + if (!vcpu)
> + goto out;
> +
> + err = kvm_vcpu_init(vcpu, kvm, id);
> + if (err)
> + goto free_vcpu;
> +
> + vcpu->arch.last_cpu = -1;
> + vcpu->arch.host_msr = mfmsr();
> + vcpu->arch.mmcr[0] = MMCR0_FC;
> + vcpu->arch.ctrl = CTRL_RUNLATCH;
> + /* default to book3s_64 (power7) */
> + vcpu->arch.pvr = 0x3f0200;
Wouldn't it make sense to simply default to the host pvr? Not sure - maybe it's not :).
> + kvmppc_set_pvr(vcpu, vcpu->arch.pvr);
> +
> + /* remember where some real-mode handlers are */
> + vcpu->arch.trampoline_lowmem = kvmppc_trampoline_lowmem;
> + vcpu->arch.trampoline_enter = kvmppc_trampoline_enter;
> + vcpu->arch.highmem_handler = (ulong)kvmppc_handler_highmem;
> + vcpu->arch.rmcall = *(ulong*)kvmppc_rmcall;
> +
> + lpcr = kvm->arch.host_lpcr & (LPCR_PECE | LPCR_LPES);
> + lpcr |= LPCR_VPM0 | LPCR_VRMA_L | (4UL << LPCR_DPFD_SH) | LPCR_HDICE;
> + vcpu->arch.lpcr = lpcr;
> +
> + return vcpu;
> +
> +free_vcpu:
> + kfree(vcpu);
> +out:
> + return ERR_PTR(err);
> +}
> +
> +void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
> +{
> + kvm_vcpu_uninit(vcpu);
> + kfree(vcpu);
> +}
> +
> +extern int __kvmppc_vcore_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
> +
> +int kvmppc_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu)
> +{
> + u64 now;
> +
> + if (signal_pending(current)) {
> + run->exit_reason = KVM_EXIT_INTR;
> + return -EINTR;
> + }
> +
> + flush_fp_to_thread(current);
Do those with fine with preemption enabled?
> + flush_altivec_to_thread(current);
> + flush_vsx_to_thread(current);
> + preempt_disable();
> +
> + kvm_guest_enter();
> +
> + __kvmppc_vcore_entry(NULL, vcpu);
> +
> + kvm_guest_exit();
> +
> + preempt_enable();
> + kvm_resched(vcpu);
> +
> + now = get_tb();
> + /* cancel pending dec exception if dec is positive */
> + if (now < vcpu->arch.dec_expires && kvmppc_core_pending_dec(vcpu))
> + kvmppc_core_dequeue_dec(vcpu);
> +
> + return kvmppc_handle_exit(run, vcpu, current);
> +}
> +
> +int kvmppc_core_prepare_memory_region(struct kvm *kvm,
> + struct kvm_userspace_memory_region *mem)
> +{
> + if (mem->guest_phys_addr == 0 && mem->memory_size != 0)
> + return kvmppc_prepare_vrma(kvm, mem);
> + return 0;
> +}
> +
> +void kvmppc_core_commit_memory_region(struct kvm *kvm,
> + struct kvm_userspace_memory_region *mem)
> +{
> + if (mem->guest_phys_addr == 0 && mem->memory_size != 0)
> + kvmppc_map_vrma(kvm, mem);
> +}
> +
> +int kvmppc_core_init_vm(struct kvm *kvm)
> +{
> + long r;
> +
> + /* Allocate hashed page table */
> + r = kvmppc_alloc_hpt(kvm);
> +
> + return r;
> +}
> +
> +void kvmppc_core_destroy_vm(struct kvm *kvm)
> +{
> + kvmppc_free_hpt(kvm);
> +}
> +
> +/* These are stubs for now */
> +void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end)
> +{
> +}
> +
> +/* We don't need to emulate any privileged instructions or dcbz */
> +int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
> + unsigned int inst, int *advance)
> +{
> + return EMULATE_FAIL;
> +}
> +
> +int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
> +{
> + return EMULATE_FAIL;
> +}
> +
> +int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
> +{
> + return EMULATE_FAIL;
> +}
> +
> +static int kvmppc_book3s_hv_init(void)
> +{
> + int r;
> +
> + r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
> +
> + if (r)
> + return r;
> +
> + r = kvmppc_mmu_hv_init();
> +
> + return r;
> +}
> +
> +static void kvmppc_book3s_hv_exit(void)
> +{
> + kvm_exit();
> +}
> +
> +module_init(kvmppc_book3s_hv_init);
> +module_exit(kvmppc_book3s_hv_exit);
> diff --git a/arch/powerpc/kvm/book3s_hv_interrupts.S b/arch/powerpc/kvm/book3s_hv_interrupts.S
> new file mode 100644
> index 0000000..19d152d
> --- /dev/null
> +++ b/arch/powerpc/kvm/book3s_hv_interrupts.S
> @@ -0,0 +1,326 @@
> +/*
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License, version 2, as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
> + *
> + * Copyright 2011 Paul Mackerras, IBM Corp. <paulus at au1.ibm.com>
> + *
> + * Derived from book3s_interrupts.S, which is:
> + * Copyright SUSE Linux Products GmbH 2009
> + *
> + * Authors: Alexander Graf <agraf at suse.de>
> + */
> +
> +#include <asm/ppc_asm.h>
> +#include <asm/kvm_asm.h>
> +#include <asm/reg.h>
> +#include <asm/page.h>
> +#include <asm/asm-offsets.h>
> +#include <asm/exception-64s.h>
> +#include <asm/ppc-opcode.h>
> +
> +#define DISABLE_INTERRUPTS \
> + mfmsr r0; \
> + rldicl r0,r0,48,1; \
> + rotldi r0,r0,16; \
> + mtmsrd r0,1; \
> +
> +/*****************************************************************************
> + * *
> + * Guest entry / exit code that is in kernel module memory (vmalloc) *
> + * *
> + ****************************************************************************/
> +
> +/* Registers:
> + * r4: vcpu pointer
> + */
> +_GLOBAL(__kvmppc_vcore_entry)
> +
> + /* Write correct stack frame */
> + mflr r0
> + std r0,PPC_LR_STKOFF(r1)
> +
> + /* Save host state to the stack */
> + stdu r1, -SWITCH_FRAME_SIZE(r1)
> +
> + /* Save non-volatile registers (r14 - r31) */
> + SAVE_NVGPRS(r1)
> +
> + /* Save host PMU registers and load guest PMU registers */
> + /* R4 is live here (vcpu pointer) but not r3 or r5 */
> + li r3, 1
> + sldi r3, r3, 31 /* MMCR0_FC (freeze counters) bit */
> + mfspr r7, SPRN_MMCR0 /* save MMCR0 */
> + mtspr SPRN_MMCR0, r3 /* freeze all counters, disable interrupts */
> + isync
> + ld r3, PACALPPACAPTR(r13) /* is the host using the PMU? */
> + lbz r5, LPPACA_PMCINUSE(r3)
> + cmpwi r5, 0
> + beq 31f /* skip if not */
> + mfspr r5, SPRN_MMCR1
> + mfspr r6, SPRN_MMCRA
> + std r7, PACA_HOST_MMCR(r13)
> + std r5, PACA_HOST_MMCR + 8(r13)
> + std r6, PACA_HOST_MMCR + 16(r13)
> + mfspr r3, SPRN_PMC1
> + mfspr r5, SPRN_PMC2
> + mfspr r6, SPRN_PMC3
> + mfspr r7, SPRN_PMC4
> + mfspr r8, SPRN_PMC5
> + mfspr r9, SPRN_PMC6
> + stw r3, PACA_HOST_PMC(r13)
> + stw r5, PACA_HOST_PMC + 4(r13)
> + stw r6, PACA_HOST_PMC + 8(r13)
> + stw r7, PACA_HOST_PMC + 12(r13)
> + stw r8, PACA_HOST_PMC + 16(r13)
> + stw r9, PACA_HOST_PMC + 20(r13)
> +31:
> +
> + /* Save host DSCR */
> + mfspr r3, SPRN_DSCR
> + std r3, PACA_HOST_DSCR(r13)
> +
> + /* Save host DABR */
> + mfspr r3, SPRN_DABR
> + std r3, PACA_DABR(r13)
> +
> + DISABLE_INTERRUPTS
> +
> + /*
> + * Put whatever is in the decrementer into the
> + * hypervisor decrementer.
> + */
> + mfspr r8,SPRN_DEC
> + mftb r7
> + mtspr SPRN_HDEC,r8
Can't we just always use HDEC on the host? That's save us from all the swapping here.
> + extsw r8,r8
> + add r8,r8,r7
> + std r8,PACA_KVM_DECEXP(r13)
Why is dec+hdec on vcpu_run decexp? What exactly does this store?
> +
> + ld r5, VCPU_TRAMPOLINE_ENTER(r4)
> + LOAD_REG_IMMEDIATE(r6, MSR_KERNEL & ~(MSR_IR | MSR_DR))
> +
> + /* Jump to segment patching handler and into our guest */
> + b kvmppc_rmcall
> +
> +/*
> + * This is the handler in module memory. It gets jumped at from the
> + * lowmem trampoline code, so it's basically the guest exit code.
> + *
> + */
> +
> +.global kvmppc_handler_highmem
> +kvmppc_handler_highmem:
> +
> + /*
> + * Register usage at this point:
> + *
> + * R1 = host R1
> + * R2 = host R2
> + * R12 = exit handler id
> + * R13 = PACA
> + * SVCPU.* = guest *
> + *
> + */
> +
> + /* R7 = vcpu */
> + ld r7, PACA_KVM_VCPU(r13)
> +
> + /*
> + * Reload DEC. HDEC interrupts were disabled when
> + * we reloaded the host's LPCR value.
> + */
> + ld r3, PACA_KVM_DECEXP(r13)
> + mftb r4
> + subf r4, r4, r3
> + mtspr SPRN_DEC, r4
> +
> + ld r3, PACALPPACAPTR(r13) /* is the host using the PMU? */
> + lbz r4, LPPACA_PMCINUSE(r3)
> + cmpwi r4, 0
> + beq 23f /* skip if not */
> + lwz r3, PACA_HOST_PMC(r13)
> + lwz r4, PACA_HOST_PMC + 4(r13)
> + lwz r5, PACA_HOST_PMC + 4(r13)
copy&paste error?
> + lwz r6, PACA_HOST_PMC + 4(r13)
> + lwz r8, PACA_HOST_PMC + 4(r13)
> + lwz r9, PACA_HOST_PMC + 4(r13)
> + mtspr SPRN_PMC1, r3
> + mtspr SPRN_PMC2, r4
> + mtspr SPRN_PMC3, r5
> + mtspr SPRN_PMC4, r6
> + mtspr SPRN_PMC5, r8
> + mtspr SPRN_PMC6, r9
> + ld r3, PACA_HOST_MMCR(r13)
> + ld r4, PACA_HOST_MMCR + 8(r13)
> + ld r5, PACA_HOST_MMCR + 16(r13)
> + mtspr SPRN_MMCR1, r4
> + mtspr SPRN_MMCRA, r5
> + mtspr SPRN_MMCR0, r3
> + isync
> +23:
> +
> + /* Restore host msr -> SRR1 */
> + ld r4, VCPU_HOST_MSR(r7)
> +
> + /*
> + * For some interrupts, we need to call the real Linux
> + * handler, so it can do work for us. This has to happen
> + * as if the interrupt arrived from the kernel though,
> + * so let's fake it here where most state is restored.
> + *
> + * Call Linux for hardware interrupts/decrementer
> + * r3 = address of interrupt handler (exit reason)
> + */
> + /* Note: preemption is disabled at this point */
> +
> + cmpwi r12, BOOK3S_INTERRUPT_MACHINE_CHECK
> + beq 1f
> + cmpwi r12, BOOK3S_INTERRUPT_EXTERNAL
> + beq 1f
> +
> + /* Back to EE=1 */
> + mtmsr r4
> + sync
> + b kvm_return_point
> +
> +1: bl call_linux_handler
> +
> +.global kvm_return_point
> +kvm_return_point:
> + /* Restore non-volatile host registers (r14 - r31) */
> + REST_NVGPRS(r1)
> +
> + addi r1, r1, SWITCH_FRAME_SIZE
> + ld r0, PPC_LR_STKOFF(r1)
> + mtlr r0
> + blr
> +
> +call_linux_handler:
> + /* Restore host IP -> SRR0 */
> + mflr r3
> + mtlr r12
> +
> + ld r5, VCPU_TRAMPOLINE_LOWMEM(r7)
> + LOAD_REG_IMMEDIATE(r6, MSR_KERNEL & ~(MSR_IR | MSR_DR))
> + b kvmppc_rmcall
> +
> +/*
> + * Save away FP, VMX and VSX registers.
> + * r3 = vcpu pointer
> +*/
> +_GLOBAL(kvmppc_save_fp)
> + mfmsr r9
> + ori r8,r9,MSR_FP
> +#ifdef CONFIG_ALTIVEC
> +#ifdef CONFIG_VSX
> + oris r8,r8,(MSR_VEC|MSR_VSX)@h
> +#else
> + oris r8,r8,MSR_VEC at h
> +#endif
> +#endif
> + mtmsrd r8
> + isync
> +#ifdef CONFIG_VSX
> +BEGIN_FTR_SECTION
> + reg = 0
> + .rept 32
> + li r6,reg*16+VCPU_VSRS
> + stxvd2x reg,r6,r3
> + reg = reg + 1
> + .endr
> +FTR_SECTION_ELSE
> +#endif
> + reg = 0
> + .rept 32
> + stfd reg,reg*8+VCPU_FPRS(r3)
> + reg = reg + 1
> + .endr
> +#ifdef CONFIG_VSX
> +ALT_FTR_SECTION_END_IFSET(CPU_FTR_VSX)
> +#endif
> + mffs fr0
> + stfd fr0,VCPU_FPSCR(r3)
> +
> +#ifdef CONFIG_ALTIVEC
> +BEGIN_FTR_SECTION
> + reg = 0
> + .rept 32
> + li r6,reg*16+VCPU_VRS
> + stvx reg,r6,r3
> + reg = reg + 1
> + .endr
> + mfvscr vr0
> + li r6,VCPU_VSCR
> + stvx vr0,r6,r3
> +END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
> +#endif
> + mfspr r6,SPRN_VRSAVE
> + stw r6,VCPU_VRSAVE(r3)
> + mtmsrd r9
> + isync
> + blr
> +
> +/*
> + * Load up FP, VMX and VSX registers
> + * r4 = vcpu pointer
> + */
> + .globl kvmppc_load_fp
> +kvmppc_load_fp:
> + mfmsr r9
> + ori r8,r9,MSR_FP
> +#ifdef CONFIG_ALTIVEC
> +#ifdef CONFIG_VSX
> + oris r8,r8,(MSR_VEC|MSR_VSX)@h
> +#else
> + oris r8,r8,MSR_VEC at h
> +#endif
> +#endif
> + mtmsrd r8
> + isync
> + lfd fr0,VCPU_FPSCR(r4)
> + MTFSF_L(fr0)
> +#ifdef CONFIG_VSX
> +BEGIN_FTR_SECTION
> + reg = 0
> + .rept 32
> + li r7,reg*16+VCPU_VSRS
> + lxvd2x reg,r7,r4
> + reg = reg + 1
> + .endr
> +FTR_SECTION_ELSE
> +#endif
> + reg = 0
> + .rept 32
> + lfd reg,reg*8+VCPU_FPRS(r4)
> + reg = reg + 1
> + .endr
> +#ifdef CONFIG_VSX
> +ALT_FTR_SECTION_END_IFSET(CPU_FTR_VSX)
> +#endif
> +
> +#ifdef CONFIG_ALTIVEC
> + li r7,VCPU_VSCR
> + lvx vr0,r7,r4
> + mtvscr vr0
> +BEGIN_FTR_SECTION
> + reg = 0
> + .rept 32
> + li r7,reg*16+VCPU_VRS
> + lvx reg,r7,r4
> + reg = reg + 1
> + .endr
> +END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
> +#endif
> + lwz r7,VCPU_VRSAVE(r4)
> + mtspr SPRN_VRSAVE,r7
> + blr
> diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
> new file mode 100644
> index 0000000..813b01c
> --- /dev/null
> +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
> @@ -0,0 +1,663 @@
> +/*
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License, version 2, as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * Copyright 2011 Paul Mackerras, IBM Corp. <paulus at au1.ibm.com>
> + *
> + * Derived from book3s_rmhandlers.S and other files, which are:
> + *
> + * Copyright SUSE Linux Products GmbH 2009
> + *
> + * Authors: Alexander Graf <agraf at suse.de>
> + */
> +
> +#include <asm/ppc_asm.h>
> +#include <asm/kvm_asm.h>
> +#include <asm/reg.h>
> +#include <asm/page.h>
> +#include <asm/asm-offsets.h>
> +#include <asm/exception-64s.h>
> +
> +/*****************************************************************************
> + * *
> + * Real Mode handlers that need to be in the linear mapping *
> + * *
> + ****************************************************************************/
> +
> +#define SHADOW_VCPU_OFF PACA_KVM_SVCPU
> +
> + .globl kvmppc_skip_interrupt
> +kvmppc_skip_interrupt:
> + mfspr r13,SPRN_SRR0
> + addi r13,r13,4
> + mtspr SPRN_SRR0,r13
> + GET_SCRATCH0(r13)
> + rfid
> + b .
> +
> + .globl kvmppc_skip_Hinterrupt
> +kvmppc_skip_Hinterrupt:
> + mfspr r13,SPRN_HSRR0
> + addi r13,r13,4
> + mtspr SPRN_HSRR0,r13
> + GET_SCRATCH0(r13)
> + hrfid
> + b .
> +
> +/*
> + * This trampoline brings us back to a real mode handler
> + *
> + * Input Registers:
> + *
> + * R5 = SRR0
> + * R6 = SRR1
> + * R12 = real-mode IP
> + * LR = real-mode IP
> + *
> + */
> +.global kvmppc_handler_lowmem_trampoline
> +kvmppc_handler_lowmem_trampoline:
> + cmpwi r12,0x500
> + beq 1f
> + cmpwi r12,0x980
> + beq 1f
What?
1) use the macros please
2) why?
> + mtsrr0 r3
> + mtsrr1 r4
> + blr
> +1: mtspr SPRN_HSRR0,r3
> + mtspr SPRN_HSRR1,r4
> + blr
> +
> +/*
> + * Call a function in real mode.
> + * Must be called with interrupts hard-disabled.
> + *
> + * Input Registers:
> + *
> + * R5 = function
> + * R6 = MSR
> + * R7 = scratch register
> + *
> + */
> +_GLOBAL(kvmppc_rmcall)
> + mfmsr r7
> + li r0,MSR_RI /* clear RI in MSR */
> + andc r7,r7,r0
> + mtmsrd r7,1
> + mtsrr0 r5
> + mtsrr1 r6
> + RFI
> +
> +.global kvmppc_trampoline_lowmem
> +kvmppc_trampoline_lowmem:
> + PPC_LONG kvmppc_handler_lowmem_trampoline - _stext
> +
> +.global kvmppc_trampoline_enter
> +kvmppc_trampoline_enter:
> + PPC_LONG kvmppc_handler_trampoline_enter - _stext
> +
> +#define ULONG_SIZE 8
> +#define VCPU_GPR(n) (VCPU_GPRS + (n * ULONG_SIZE))
> +
> +/******************************************************************************
> + * *
> + * Entry code *
> + * *
> + *****************************************************************************/
> +
> +.global kvmppc_handler_trampoline_enter
> +kvmppc_handler_trampoline_enter:
> +
> + /* Required state:
> + *
> + * R4 = vcpu pointer
> + * MSR = ~IR|DR
> + * R13 = PACA
> + * R1 = host R1
> + * all other volatile GPRS = free
> + */
> + ld r14, VCPU_GPR(r14)(r4)
> + ld r15, VCPU_GPR(r15)(r4)
> + ld r16, VCPU_GPR(r16)(r4)
> + ld r17, VCPU_GPR(r17)(r4)
> + ld r18, VCPU_GPR(r18)(r4)
> + ld r19, VCPU_GPR(r19)(r4)
> + ld r20, VCPU_GPR(r20)(r4)
> + ld r21, VCPU_GPR(r21)(r4)
> + ld r22, VCPU_GPR(r22)(r4)
> + ld r23, VCPU_GPR(r23)(r4)
> + ld r24, VCPU_GPR(r24)(r4)
> + ld r25, VCPU_GPR(r25)(r4)
> + ld r26, VCPU_GPR(r26)(r4)
> + ld r27, VCPU_GPR(r27)(r4)
> + ld r28, VCPU_GPR(r28)(r4)
> + ld r29, VCPU_GPR(r29)(r4)
> + ld r30, VCPU_GPR(r30)(r4)
> + ld r31, VCPU_GPR(r31)(r4)
> +
> + /* Load guest PMU registers */
> + /* R4 is live here (vcpu pointer) */
> + li r3, 1
> + sldi r3, r3, 31 /* MMCR0_FC (freeze counters) bit */
> + mtspr SPRN_MMCR0, r3 /* freeze all counters, disable ints */
> + isync
> + lwz r3, VCPU_PMC(r4) /* always load up guest PMU registers */
> + lwz r5, VCPU_PMC + 4(r4) /* to prevent information leak */
> + lwz r6, VCPU_PMC + 8(r4)
> + lwz r7, VCPU_PMC + 12(r4)
> + lwz r8, VCPU_PMC + 16(r4)
> + lwz r9, VCPU_PMC + 20(r4)
> + mtspr SPRN_PMC1, r3
> + mtspr SPRN_PMC2, r5
> + mtspr SPRN_PMC3, r6
> + mtspr SPRN_PMC4, r7
> + mtspr SPRN_PMC5, r8
> + mtspr SPRN_PMC6, r9
> + ld r3, VCPU_MMCR(r4)
> + ld r5, VCPU_MMCR + 8(r4)
> + ld r6, VCPU_MMCR + 16(r4)
> + mtspr SPRN_MMCR1, r5
> + mtspr SPRN_MMCRA, r6
> + mtspr SPRN_MMCR0, r3
> + isync
> +
> + /* Load up FP, VMX and VSX registers */
> + bl kvmppc_load_fp
> +
> + /* Switch DSCR to guest value */
> + ld r5, VCPU_DSCR(r4)
> + mtspr SPRN_DSCR, r5
> +
> + /*
> + * Set the decrementer to the guest decrementer.
> + */
> + ld r8,VCPU_DEC_EXPIRES(r4)
> + mftb r7
> + subf r3,r7,r8
> + mtspr SPRN_DEC,r3
> + stw r3,VCPU_DEC(r4)
> +
> + ld r5, VCPU_SPRG0(r4)
> + ld r6, VCPU_SPRG1(r4)
> + ld r7, VCPU_SPRG2(r4)
> + ld r8, VCPU_SPRG3(r4)
> + mtspr SPRN_SPRG0, r5
> + mtspr SPRN_SPRG1, r6
> + mtspr SPRN_SPRG2, r7
> + mtspr SPRN_SPRG3, r8
> +
> + /* Save R1 in the PACA */
> + std r1, PACA_KVM_SVCPU + SVCPU_HOST_R1(r13)
> +
> + /* Load up DAR and DSISR */
> + ld r5, VCPU_DAR(r4)
> + lwz r6, VCPU_DSISR(r4)
> + mtspr SPRN_DAR, r5
> + mtspr SPRN_DSISR, r6
> +
> + /* Set partition DABR */
> + li r5,3
> + ld r6,VCPU_DABR(r4)
> + mtspr SPRN_DABRX,r5
> + mtspr SPRN_DABR,r6
> +
> + /* Restore AMR and UAMOR, set AMOR to all 1s */
> + ld r5,VCPU_AMR(r4)
> + ld r6,VCPU_UAMOR(r4)
> + li r7,-1
> + mtspr SPRN_AMR,r5
> + mtspr SPRN_UAMOR,r6
> + mtspr SPRN_AMOR,r7
> +
> + /* Clear out SLB */
> + li r6,0
> + slbmte r6,r6
> + slbia
> + ptesync
> +
> + /* Switch to guest partition. */
> + ld r9,VCPU_KVM(r4) /* pointer to struct kvm */
> + ld r6,KVM_SDR1(r9)
> + lwz r7,KVM_LPID(r9)
> + li r0,0x3ff /* switch to reserved LPID */
> + mtspr SPRN_LPID,r0
> + ptesync
> + mtspr SPRN_SDR1,r6 /* switch to partition page table */
> + mtspr SPRN_LPID,r7
> + isync
> + ld r8,VCPU_LPCR(r4)
> + mtspr SPRN_LPCR,r8
> + isync
> +
> + /* Check if HDEC expires soon */
> + mfspr r3,SPRN_HDEC
> + cmpwi r3,10
> + li r12,0x980
define
> + mr r9,r4
> + blt hdec_soon
Is it faster to do the check than to save the check and take the odds? Also, maybe we should rather do the check in preemptible code that could just directly pass the time slice on.
> +
> + /*
> + * Invalidate the TLB if we could possibly have stale TLB
> + * entries for this partition on this core due to the use
> + * of tlbiel.
> + */
> + ld r9,VCPU_KVM(r4) /* pointer to struct kvm */
> + lwz r5,VCPU_VCPUID(r4)
> + lhz r6,PACAPACAINDEX(r13)
> + lhz r8,VCPU_LAST_CPU(r4)
> + sldi r7,r6,1 /* see if this is the same vcpu */
> + add r7,r7,r9 /* as last ran on this pcpu */
> + lhz r0,KVM_LAST_VCPU(r7)
> + cmpw r6,r8 /* on the same cpu core as last time? */
> + bne 3f
> + cmpw r0,r5 /* same vcpu as this core last ran? */
> + beq 1f
> +3: sth r6,VCPU_LAST_CPU(r4) /* if not, invalidate partition TLB */
> + sth r5,KVM_LAST_VCPU(r7)
> + li r6,128
> + mtctr r6
> + li r7,0x800 /* IS field = 0b10 */
> + ptesync
> +2: tlbiel r7
> + addi r7,r7,0x1000
> + bdnz 2b
> + ptesync
> +1:
> +
> + /* Save purr/spurr */
> + mfspr r5,SPRN_PURR
> + mfspr r6,SPRN_SPURR
> + std r5,PACA_HOST_PURR(r13)
> + std r6,PACA_HOST_SPURR(r13)
> + ld r7,VCPU_PURR(r4)
> + ld r8,VCPU_SPURR(r4)
> + mtspr SPRN_PURR,r7
> + mtspr SPRN_SPURR,r8
> +
> + /* Load up guest SLB entries */
> + lwz r5,VCPU_SLB_MAX(r4)
> + cmpwi r5,0
> + beq 9f
> + mtctr r5
> + addi r6,r4,VCPU_SLB
> +1: ld r8,VCPU_SLB_E(r6)
> + ld r9,VCPU_SLB_V(r6)
> + slbmte r9,r8
> + addi r6,r6,VCPU_SLB_SIZE
> + bdnz 1b
> +9:
> +
> + /* Restore state of CTRL run bit; assume 1 on entry */
> + lwz r5,VCPU_CTRL(r4)
> + andi. r5,r5,1
> + bne 4f
> + mfspr r6,SPRN_CTRLF
> + clrrdi r6,r6,1
> + mtspr SPRN_CTRLT,r6
> +4:
> + ld r6, VCPU_CTR(r4)
> + lwz r7, VCPU_XER(r4)
> +
> + mtctr r6
> + mtxer r7
> +
> + /* Move SRR0 and SRR1 into the respective regs */
> + ld r6, VCPU_SRR0(r4)
> + ld r7, VCPU_SRR1(r4)
> + mtspr SPRN_SRR0, r6
> + mtspr SPRN_SRR1, r7
> +
> + ld r10, VCPU_PC(r4)
> +
> + ld r11, VCPU_MSR(r4) /* r10 = vcpu->arch.msr & ~MSR_HV */
> + rldicl r11, r11, 63 - MSR_HV_LG, 1
> + rotldi r11, r11, 1 + MSR_HV_LG
> + ori r11, r11, MSR_ME
> +
> +fast_guest_return:
> + mtspr SPRN_HSRR0,r10
> + mtspr SPRN_HSRR1,r11
> +
> + /* Activate guest mode, so faults get handled by KVM */
> + li r9, KVM_GUEST_MODE_GUEST
> + stb r9, (SHADOW_VCPU_OFF + SVCPU_IN_GUEST)(r13)
> +
> + /* Enter guest */
> +
> + ld r5, VCPU_LR(r4)
> + lwz r6, VCPU_CR(r4)
> + mtlr r5
> + mtcr r6
> +
> + ld r0, VCPU_GPR(r0)(r4)
> + ld r1, VCPU_GPR(r1)(r4)
> + ld r2, VCPU_GPR(r2)(r4)
> + ld r3, VCPU_GPR(r3)(r4)
> + ld r5, VCPU_GPR(r5)(r4)
> + ld r6, VCPU_GPR(r6)(r4)
> + ld r7, VCPU_GPR(r7)(r4)
> + ld r8, VCPU_GPR(r8)(r4)
> + ld r9, VCPU_GPR(r9)(r4)
> + ld r10, VCPU_GPR(r10)(r4)
> + ld r11, VCPU_GPR(r11)(r4)
> + ld r12, VCPU_GPR(r12)(r4)
> + ld r13, VCPU_GPR(r13)(r4)
> +
> + ld r4, VCPU_GPR(r4)(r4)
> +
> + hrfid
> + b .
> +kvmppc_handler_trampoline_enter_end:
> +
> +
> +/******************************************************************************
> + * *
> + * Exit code *
> + * *
> + *****************************************************************************/
> +
> +/*
> + * We come here from the first-level interrupt handlers.
> + */
> + .globl kvmppc_interrupt
> +kvmppc_interrupt:
> + /*
> + * Register contents:
> + * R12 = interrupt vector
> + * R13 = PACA
> + * guest CR, R12 saved in shadow VCPU SCRATCH1/0
> + * guest R13 saved in SPRN_SCRATCH0
> + */
> + /* abuse host_r2 as third scratch area; we get r2 from PACATOC(r13) */
> + std r9, (SHADOW_VCPU_OFF + SVCPU_HOST_R2)(r13)
> + ld r9, PACA_KVM_VCPU(r13)
> +
> + /* Save registers */
> +
> + std r0, VCPU_GPR(r0)(r9)
> + std r1, VCPU_GPR(r1)(r9)
> + std r2, VCPU_GPR(r2)(r9)
> + std r3, VCPU_GPR(r3)(r9)
> + std r4, VCPU_GPR(r4)(r9)
> + std r5, VCPU_GPR(r5)(r9)
> + std r6, VCPU_GPR(r6)(r9)
> + std r7, VCPU_GPR(r7)(r9)
> + std r8, VCPU_GPR(r8)(r9)
> + ld r0, (SHADOW_VCPU_OFF + SVCPU_HOST_R2)(r13)
> + std r0, VCPU_GPR(r9)(r9)
> + std r10, VCPU_GPR(r10)(r9)
> + std r11, VCPU_GPR(r11)(r9)
> + ld r3, (SHADOW_VCPU_OFF + SVCPU_SCRATCH0)(r13)
> + lwz r4, (SHADOW_VCPU_OFF + SVCPU_SCRATCH1)(r13)
> + std r3, VCPU_GPR(r12)(r9)
> + stw r4, VCPU_CR(r9)
> +
> + /* Restore R1/R2 so we can handle faults */
> + ld r1, (SHADOW_VCPU_OFF + SVCPU_HOST_R1)(r13)
> + ld r2, PACATOC(r13)
> +
> + mfspr r10, SPRN_SRR0
> + mfspr r11, SPRN_SRR1
> + std r10, VCPU_SRR0(r9)
> + std r11, VCPU_SRR1(r9)
> + andi. r0, r12, 2 /* need to read HSRR0/1? */
> + beq 1f
> + mfspr r10, SPRN_HSRR0
> + mfspr r11, SPRN_HSRR1
> + clrrdi r12, r12, 2
> +1: std r10, VCPU_PC(r9)
> + std r11, VCPU_MSR(r9)
> +
> + GET_SCRATCH0(r3)
> + mflr r4
> + std r3, VCPU_GPR(r13)(r9)
> + std r4, VCPU_LR(r9)
> +
> + /* Unset guest mode */
> + li r0, KVM_GUEST_MODE_NONE
> + stb r0, (SHADOW_VCPU_OFF + SVCPU_IN_GUEST)(r13)
> +
> + stw r12,VCPU_TRAP(r9)
> +
> + /* See if this is a leftover HDEC interrupt */
> + cmpwi r12,0x980
define
> + bne 2f
> + mfspr r3,SPRN_HDEC
> + cmpwi r3,0
> + bge ignore_hdec
> +2:
> +
> + /* Check for mediated interrupts (could be done earlier really ...) */
> + cmpwi r12,0x500
define
> + bne+ 1f
> + ld r5,VCPU_LPCR(r9)
> + andi. r0,r11,MSR_EE
> + beq 1f
> + andi. r0,r5,LPCR_MER
> + bne bounce_ext_interrupt
So there's no need for the external check that directly goes into the Linux handler code on full-fledged exits?
> +1:
> +
> + /* Save DEC */
> + mfspr r5,SPRN_DEC
> + mftb r6
> + extsw r5,r5
> + add r5,r5,r6
> + std r5,VCPU_DEC_EXPIRES(r9)
> +
> + /* Save HEIR (in last_inst) if this is a HEI (e40) */
> + li r3,-1
> + cmpwi r12,0xe40
> + bne 11f
> + mfspr r3,SPRN_HEIR
> +11: stw r3,VCPU_LAST_INST(r9)
> +
> + /* Save more register state */
> + mfxer r5
> + mfdar r6
> + mfdsisr r7
> + mfctr r8
> +
> + stw r5, VCPU_XER(r9)
> + std r6, VCPU_DAR(r9)
> + stw r7, VCPU_DSISR(r9)
> + std r8, VCPU_CTR(r9)
> + cmpwi r12,0xe00 /* grab HDAR & HDSISR if HDSI */
> + beq 6f
> +7: std r6, VCPU_FAULT_DAR(r9)
> + stw r7, VCPU_FAULT_DSISR(r9)
> +
> + /* Save guest CTRL register, set runlatch to 1 */
> + mfspr r6,SPRN_CTRLF
> + stw r6,VCPU_CTRL(r9)
> + andi. r0,r6,1
> + bne 4f
> + ori r6,r6,1
> + mtspr SPRN_CTRLT,r6
> +4:
> + /* Read the guest SLB and save it away */
> + li r6,0
> + addi r7,r9,VCPU_SLB
> + li r5,0
> +1: slbmfee r8,r6
> + andis. r0,r8,SLB_ESID_V at h
> + beq 2f
> + add r8,r8,r6 /* put index in */
> + slbmfev r3,r6
> + std r8,VCPU_SLB_E(r7)
> + std r3,VCPU_SLB_V(r7)
> + addi r7,r7,VCPU_SLB_SIZE
> + addi r5,r5,1
> +2: addi r6,r6,1
> + cmpwi r6,32
I don't like how the 32 is hardcoded here. Better create a define for it and use the same in the init code.
> + blt 1b
> + stw r5,VCPU_SLB_MAX(r9)
> +
> + /*
> + * Save the guest PURR/SPURR
> + */
> + mfspr r5,SPRN_PURR
> + mfspr r6,SPRN_SPURR
> + ld r7,VCPU_PURR(r9)
> + ld r8,VCPU_SPURR(r9)
> + std r5,VCPU_PURR(r9)
> + std r6,VCPU_SPURR(r9)
> + subf r5,r7,r5
> + subf r6,r8,r6
> +
> + /*
> + * Restore host PURR/SPURR and add guest times
> + * so that the time in the guest gets accounted.
> + */
> + ld r3,PACA_HOST_PURR(r13)
> + ld r4,PACA_HOST_SPURR(r13)
> + add r3,r3,r5
> + add r4,r4,r6
> + mtspr SPRN_PURR,r3
> + mtspr SPRN_SPURR,r4
> +
> + /* Clear out SLB */
> + li r5,0
> + slbmte r5,r5
> + slbia
> + ptesync
> +
> +hdec_soon:
> + /* Switch back to host partition */
> + ld r4,VCPU_KVM(r9) /* pointer to struct kvm */
> + ld r6,KVM_HOST_SDR1(r4)
> + lwz r7,KVM_HOST_LPID(r4)
> + li r8,0x3ff /* switch to reserved LPID */
is it reserved by ISA? Either way, hard-coding the constant without a name is not nice :).
> + mtspr SPRN_LPID,r8
> + ptesync
> + mtspr SPRN_SDR1,r6 /* switch to partition page table */
> + mtspr SPRN_LPID,r7
> + isync
> + lis r8,0x7fff
INT_MAX at h might be more readable.
> + mtspr SPRN_HDEC,r8
> +
> + ld r8,KVM_HOST_LPCR(r4)
> + mtspr SPRN_LPCR,r8
> + isync
> +
> + /* load host SLB entries */
> + ld r8,PACA_SLBSHADOWPTR(r13)
> +
> + .rept SLB_NUM_BOLTED
> + ld r5,SLBSHADOW_SAVEAREA(r8)
> + ld r6,SLBSHADOW_SAVEAREA+8(r8)
> + andis. r7,r5,SLB_ESID_V at h
> + beq 1f
> + slbmte r6,r5
> +1: addi r8,r8,16
> + .endr
> +
> + /* Save and reset AMR and UAMOR before turning on the MMU */
> + mfspr r5,SPRN_AMR
> + mfspr r6,SPRN_UAMOR
> + std r5,VCPU_AMR(r9)
> + std r6,VCPU_UAMOR(r9)
> + li r6,0
> + mtspr SPRN_AMR,r6
> +
> + /* Restore host DABR and DABRX */
> + ld r5,PACA_DABR(r13)
> + li r6,7
> + mtspr SPRN_DABR,r5
> + mtspr SPRN_DABRX,r6
> +
> + /* Switch DSCR back to host value */
> + mfspr r8, SPRN_DSCR
> + ld r7, PACA_HOST_DSCR(r13)
> + std r8, VCPU_DSCR(r7)
> + mtspr SPRN_DSCR, r7
> +
> + /* Save non-volatile GPRs */
> + std r14, VCPU_GPR(r14)(r9)
> + std r15, VCPU_GPR(r15)(r9)
> + std r16, VCPU_GPR(r16)(r9)
> + std r17, VCPU_GPR(r17)(r9)
> + std r18, VCPU_GPR(r18)(r9)
> + std r19, VCPU_GPR(r19)(r9)
> + std r20, VCPU_GPR(r20)(r9)
> + std r21, VCPU_GPR(r21)(r9)
> + std r22, VCPU_GPR(r22)(r9)
> + std r23, VCPU_GPR(r23)(r9)
> + std r24, VCPU_GPR(r24)(r9)
> + std r25, VCPU_GPR(r25)(r9)
> + std r26, VCPU_GPR(r26)(r9)
> + std r27, VCPU_GPR(r27)(r9)
> + std r28, VCPU_GPR(r28)(r9)
> + std r29, VCPU_GPR(r29)(r9)
> + std r30, VCPU_GPR(r30)(r9)
> + std r31, VCPU_GPR(r31)(r9)
> +
> + /* Save SPRGs */
> + mfspr r3, SPRN_SPRG0
> + mfspr r4, SPRN_SPRG1
> + mfspr r5, SPRN_SPRG2
> + mfspr r6, SPRN_SPRG3
> + std r3, VCPU_SPRG0(r9)
> + std r4, VCPU_SPRG1(r9)
> + std r5, VCPU_SPRG2(r9)
> + std r6, VCPU_SPRG3(r9)
> +
> + /* Save PMU registers */
> + li r3, 1
> + sldi r3, r3, 31 /* MMCR0_FC (freeze counters) bit */
> + mfspr r4, SPRN_MMCR0 /* save MMCR0 */
> + mtspr SPRN_MMCR0, r3 /* freeze all counters, disable ints */
> + isync
> + mfspr r5, SPRN_MMCR1
> + mfspr r6, SPRN_MMCRA
> + std r4, VCPU_MMCR(r9)
> + std r5, VCPU_MMCR + 8(r9)
> + std r6, VCPU_MMCR + 16(r9)
> + mfspr r3, SPRN_PMC1
> + mfspr r4, SPRN_PMC2
> + mfspr r5, SPRN_PMC3
> + mfspr r6, SPRN_PMC4
> + mfspr r7, SPRN_PMC5
> + mfspr r8, SPRN_PMC6
> + stw r3, VCPU_PMC(r9)
> + stw r4, VCPU_PMC + 4(r9)
> + stw r5, VCPU_PMC + 8(r9)
> + stw r6, VCPU_PMC + 12(r9)
> + stw r7, VCPU_PMC + 16(r9)
> + stw r8, VCPU_PMC + 20(r9)
> +22:
> + /* save FP state */
> + mr r3, r9
> + bl .kvmppc_save_fp
> +
> + /* RFI into the highmem handler */
> + mfmsr r7
> + ori r7, r7, MSR_IR|MSR_DR|MSR_RI|MSR_ME /* Enable paging */
> + mtsrr1 r7
> + /* Load highmem handler address */
> + ld r8, VCPU_HIGHMEM_HANDLER(r3)
> + mtsrr0 r8
> +
> + RFI
> +kvmppc_handler_trampoline_exit_end:
> +
> +6: mfspr r6,SPRN_HDAR
> + mfspr r7,SPRN_HDSISR
> + b 7b
> +
> +ignore_hdec:
> + mr r4,r9
> + b fast_guest_return
> +
> +bounce_ext_interrupt:
> + mr r4,r9
> + mtspr SPRN_SRR0,r10
> + mtspr SPRN_SRR1,r11
> + li r10,0x500
> + LOAD_REG_IMMEDIATE(r11,MSR_SF | MSR_ME);
> + b fast_guest_return
> diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
> index 4b54148..e5e3f92 100644
> --- a/arch/powerpc/kvm/powerpc.c
> +++ b/arch/powerpc/kvm/powerpc.c
> @@ -38,8 +38,12 @@
>
> int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
> {
> - return !(v->arch.shared->msr & MSR_WE) ||
> +#ifndef CONFIG_KVM_BOOK3S_64_HV
> + return !(kvmppc_get_msr(v) & MSR_WE) ||
> !!(v->arch.pending_exceptions);
> +#else
> + return 1;
So what happens if the guest sets MSR_WE? It just stays in guest context idling? That'd be pretty bad for scheduling on the host.
> +#endif
> }
>
> int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
> @@ -52,7 +56,7 @@ int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
> unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
> unsigned long r2 = 0;
>
> - if (!(vcpu->arch.shared->msr & MSR_SF)) {
> + if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
> /* 32 bit mode */
> param1 &= 0xffffffff;
> param2 &= 0xffffffff;
> @@ -184,12 +188,14 @@ int kvm_dev_ioctl_check_extension(long ext)
> case KVM_CAP_PPC_IRQ_LEVEL:
> case KVM_CAP_ENABLE_CAP:
> case KVM_CAP_PPC_OSI:
> +#ifndef CONFIG_KVM_BOOK3S_64_HV
You also don't do OSI on HV :).
> case KVM_CAP_PPC_GET_PVINFO:
> r = 1;
> break;
> case KVM_CAP_COALESCED_MMIO:
> r = KVM_COALESCED_MMIO_PAGE_OFFSET;
> break;
> +#endif
> default:
> r = 0;
> break;
> @@ -286,6 +292,7 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
> hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
> tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
> vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
> + vcpu->arch.dec_expires = ~(u64)0;
>
> return 0;
> }
> @@ -474,6 +481,13 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
> for (i = 0; i < 32; i++)
> kvmppc_set_gpr(vcpu, i, gprs[i]);
> vcpu->arch.osi_needed = 0;
> + } else if (vcpu->arch.hcall_needed) {
> + int i;
> +
> + kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
> + for (i = 0; i < 6; ++i)
> + kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
> + vcpu->arch.hcall_needed = 0;
> }
>
> kvmppc_core_deliver_interrupts(vcpu);
> @@ -496,8 +510,11 @@ int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
> if (waitqueue_active(&vcpu->wq)) {
> wake_up_interruptible(&vcpu->wq);
> vcpu->stat.halt_wakeup++;
> +#ifdef CONFIG_KVM_BOOK3S_64_HV
> + } else if (vcpu->cpu != -1) {
> + smp_send_reschedule(vcpu->cpu);
Shouldn't this be done for non-HV too? The only reason we don't do it yet is because we don't do SMP, no?
> +#endif
> }
> -
eh... :)
> return 0;
> }
>
> diff --git a/arch/powerpc/kvm/trace.h b/arch/powerpc/kvm/trace.h
> index d62a14b..e5c99b8 100644
> --- a/arch/powerpc/kvm/trace.h
> +++ b/arch/powerpc/kvm/trace.h
> @@ -103,7 +103,7 @@ TRACE_EVENT(kvm_gtlb_write,
> * Book3S trace points *
> *************************************************************************/
>
> -#ifdef CONFIG_PPC_BOOK3S
> +#ifdef CONFIG_KVM_BOOK3S_NONHV
>
> TRACE_EVENT(kvm_book3s_exit,
> TP_PROTO(unsigned int exit_nr, struct kvm_vcpu *vcpu),
> diff --git a/include/linux/kvm.h b/include/linux/kvm.h
> index ea2dc1a..a4447ce 100644
> --- a/include/linux/kvm.h
> +++ b/include/linux/kvm.h
> @@ -161,6 +161,7 @@ struct kvm_pit_config {
> #define KVM_EXIT_NMI 16
> #define KVM_EXIT_INTERNAL_ERROR 17
> #define KVM_EXIT_OSI 18
> +#define KVM_EXIT_PAPR_HCALL 19
>
> /* For KVM_EXIT_INTERNAL_ERROR */
> #define KVM_INTERNAL_ERROR_EMULATION 1
> @@ -264,6 +265,11 @@ struct kvm_run {
> struct {
> __u64 gprs[32];
> } osi;
> + struct {
> + __u64 nr;
> + __u64 ret;
> + __u64 args[9];
> + } papr_hcall;
This needs some information in the documentation.
Alex
PS: I CC'ed kvm-ppc at vger. Please make sure to CC that mailing list, so people interested in kvm on ppc get your patches as well :).
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