[PATCH 5/5] powerpc: Shield code specific to 64-bit server processors
Benjamin Herrenschmidt
benh at kernel.crashing.org
Wed Jun 3 17:17:45 EST 2009
This is a random collection of added ifdef's around portions of
code that only mak sense on server processors. Using either
CONFIG_PPC_STD_MMU_64 or CONFIG_PPC_BOOK3S as seems appropriate.
This is meant to make the future merging of Book3E 64-bit support
easier.
Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
---
arch/powerpc/include/asm/lppaca.h | 6 ++++++
arch/powerpc/include/asm/mmu.h | 4 ++--
arch/powerpc/include/asm/pgtable-ppc64.h | 5 +++++
arch/powerpc/kernel/irq.c | 2 ++
arch/powerpc/kernel/pci_64.c | 5 +++++
arch/powerpc/kernel/process.c | 2 +-
arch/powerpc/kernel/prom.c | 2 +-
arch/powerpc/kernel/setup_64.c | 5 ++++-
arch/powerpc/mm/Makefile | 7 ++++---
arch/powerpc/mm/init_64.c | 2 ++
10 files changed, 32 insertions(+), 8 deletions(-)
--- linux-work.orig/arch/powerpc/mm/Makefile 2009-06-03 11:48:22.000000000 +1000
+++ linux-work/arch/powerpc/mm/Makefile 2009-06-03 11:52:00.000000000 +1000
@@ -11,10 +11,11 @@ obj-y := fault.o mem.o pgtable.o gup.
pgtable_$(CONFIG_WORD_SIZE).o
obj-$(CONFIG_PPC_MMU_NOHASH) += mmu_context_nohash.o tlb_nohash.o \
tlb_nohash_low.o
-hash-$(CONFIG_PPC_NATIVE) := hash_native_64.o
-obj-$(CONFIG_PPC64) += hash_utils_64.o \
+obj-$(CONFIG_PPC64) += mmap_64.o
+hash64-$(CONFIG_PPC_NATIVE) := hash_native_64.o
+obj-$(CONFIG_PPC_STD_MMU_64) += hash_utils_64.o \
slb_low.o slb.o stab.o \
- mmap_64.o $(hash-y)
+ mmap_64.o $(hash64-y)
obj-$(CONFIG_PPC_STD_MMU_32) += ppc_mmu_32.o
obj-$(CONFIG_PPC_STD_MMU) += hash_low_$(CONFIG_WORD_SIZE).o \
tlb_hash$(CONFIG_WORD_SIZE).o \
Index: linux-work/arch/powerpc/include/asm/pgtable-ppc64.h
===================================================================
--- linux-work.orig/arch/powerpc/include/asm/pgtable-ppc64.h 2009-06-03 11:48:22.000000000 +1000
+++ linux-work/arch/powerpc/include/asm/pgtable-ppc64.h 2009-06-03 11:52:00.000000000 +1000
@@ -31,9 +31,11 @@
#error TASK_SIZE_USER64 exceeds pagetable range
#endif
+#ifdef CONFIG_PPC_STD_MMU_64
#if TASK_SIZE_USER64 > (1UL << (USER_ESID_BITS + SID_SHIFT))
#error TASK_SIZE_USER64 exceeds user VSID range
#endif
+#endif
/*
* Define the address range of the vmalloc VM area.
@@ -199,8 +201,11 @@ static inline unsigned long pte_update(s
if (!huge)
assert_pte_locked(mm, addr);
+#ifdef CONFIG_PPC_STD_MMU_64
if (old & _PAGE_HASHPTE)
hpte_need_flush(mm, addr, ptep, old, huge);
+#endif
+
return old;
}
Index: linux-work/arch/powerpc/include/asm/mmu.h
===================================================================
--- linux-work.orig/arch/powerpc/include/asm/mmu.h 2009-06-03 11:48:22.000000000 +1000
+++ linux-work/arch/powerpc/include/asm/mmu.h 2009-06-03 11:52:00.000000000 +1000
@@ -74,10 +74,10 @@ extern void early_init_mmu_secondary(voi
#endif /* !__ASSEMBLY__ */
-#ifdef CONFIG_PPC64
+#if defined(CONFIG_PPC_STD_MMU_64)
/* 64-bit classic hash table MMU */
# include <asm/mmu-hash64.h>
-#elif defined(CONFIG_PPC_STD_MMU)
+#elif defined(CONFIG_PPC_STD_MMU_32)
/* 32-bit classic hash table MMU */
# include <asm/mmu-hash32.h>
#elif defined(CONFIG_40x)
Index: linux-work/arch/powerpc/kernel/pci_64.c
===================================================================
--- linux-work.orig/arch/powerpc/kernel/pci_64.c 2009-06-03 11:48:22.000000000 +1000
+++ linux-work/arch/powerpc/kernel/pci_64.c 2009-06-03 11:52:00.000000000 +1000
@@ -420,6 +420,9 @@ int pcibios_unmap_io_space(struct pci_bu
* so flushing the hash table is the only sane way to make sure
* that no hash entries are covering that removed bridge area
* while still allowing other busses overlapping those pages
+ *
+ * Note: If we ever support P2P hotplug on Book3E, we'll have
+ * to do an appropriate TLB flush here too
*/
if (bus->self) {
struct resource *res = bus->resource[0];
@@ -427,8 +430,10 @@ int pcibios_unmap_io_space(struct pci_bu
pr_debug("IO unmapping for PCI-PCI bridge %s\n",
pci_name(bus->self));
+#ifdef CONFIG_PPC_STD_MMU_64
__flush_hash_table_range(&init_mm, res->start + _IO_BASE,
res->end + _IO_BASE + 1);
+#endif
return 0;
}
Index: linux-work/arch/powerpc/include/asm/lppaca.h
===================================================================
--- linux-work.orig/arch/powerpc/include/asm/lppaca.h 2009-06-03 11:48:22.000000000 +1000
+++ linux-work/arch/powerpc/include/asm/lppaca.h 2009-06-03 11:52:00.000000000 +1000
@@ -20,6 +20,11 @@
#define _ASM_POWERPC_LPPACA_H
#ifdef __KERNEL__
+/* These definitions relate to hypervisors that only exist when using
+ * a server type processor
+ */
+#ifdef CONFIG_PPC_BOOK3S
+
//=============================================================================
//
// This control block contains the data that is shared between the
@@ -158,5 +163,6 @@ struct slb_shadow {
extern struct slb_shadow slb_shadow[];
+#endif /* CONFIG_PPC_BOOK3S */
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_LPPACA_H */
Index: linux-work/arch/powerpc/kernel/irq.c
===================================================================
--- linux-work.orig/arch/powerpc/kernel/irq.c 2009-06-03 11:48:22.000000000 +1000
+++ linux-work/arch/powerpc/kernel/irq.c 2009-06-03 11:52:00.000000000 +1000
@@ -117,6 +117,7 @@ notrace void raw_local_irq_restore(unsig
if (!en)
return;
+#ifdef CONFIG_PPC_STD_MMU_64
if (firmware_has_feature(FW_FEATURE_ISERIES)) {
/*
* Do we need to disable preemption here? Not really: in the
@@ -134,6 +135,7 @@ notrace void raw_local_irq_restore(unsig
if (local_paca->lppaca_ptr->int_dword.any_int)
iseries_handle_interrupts();
}
+#endif /* CONFIG_PPC_STD_MMU_64 */
/*
* if (get_paca()->hard_enabled) return;
Index: linux-work/arch/powerpc/mm/init_64.c
===================================================================
--- linux-work.orig/arch/powerpc/mm/init_64.c 2009-06-03 11:48:22.000000000 +1000
+++ linux-work/arch/powerpc/mm/init_64.c 2009-06-03 11:52:00.000000000 +1000
@@ -66,6 +66,7 @@
#include "mmu_decl.h"
+#ifdef CONFIG_PPC_STD_MMU_64
#if PGTABLE_RANGE > USER_VSID_RANGE
#warning Limited user VSID range means pagetable space is wasted
#endif
@@ -73,6 +74,7 @@
#if (TASK_SIZE_USER64 < PGTABLE_RANGE) && (TASK_SIZE_USER64 < USER_VSID_RANGE)
#warning TASK_SIZE is smaller than it needs to be.
#endif
+#endif /* CONFIG_PPC_STD_MMU_64 */
phys_addr_t memstart_addr = ~0;
phys_addr_t kernstart_addr;
Index: linux-work/arch/powerpc/kernel/process.c
===================================================================
--- linux-work.orig/arch/powerpc/kernel/process.c 2009-06-03 11:48:22.000000000 +1000
+++ linux-work/arch/powerpc/kernel/process.c 2009-06-03 11:52:00.000000000 +1000
@@ -650,7 +650,7 @@ int copy_thread(unsigned long clone_flag
p->thread.ksp_limit = (unsigned long)task_stack_page(p) +
_ALIGN_UP(sizeof(struct thread_info), 16);
-#ifdef CONFIG_PPC64
+#ifdef CONFIG_PPC_STD_MMU_64
if (cpu_has_feature(CPU_FTR_SLB)) {
unsigned long sp_vsid;
unsigned long llp = mmu_psize_defs[mmu_linear_psize].sllp;
Index: linux-work/arch/powerpc/kernel/setup_64.c
===================================================================
--- linux-work.orig/arch/powerpc/kernel/setup_64.c 2009-06-03 11:48:22.000000000 +1000
+++ linux-work/arch/powerpc/kernel/setup_64.c 2009-06-03 11:52:00.000000000 +1000
@@ -417,9 +417,11 @@ void __init setup_system(void)
if (ppc64_caches.iline_size != 0x80)
printk("ppc64_caches.icache_line_size = 0x%x\n",
ppc64_caches.iline_size);
+#ifdef CONFIG_PPC_STD_MMU_64
if (htab_address)
printk("htab_address = 0x%p\n", htab_address);
printk("htab_hash_mask = 0x%lx\n", htab_hash_mask);
+#endif /* CONFIG_PPC_STD_MMU_64 */
if (PHYSICAL_START > 0)
printk("physical_start = 0x%lx\n",
PHYSICAL_START);
@@ -511,8 +513,9 @@ void __init setup_arch(char **cmdline_p)
irqstack_early_init();
emergency_stack_init();
+#ifdef CONFIG_PPC_STD_MMU_64
stabs_alloc();
-
+#endif
/* set up the bootmem stuff with available memory */
do_init_bootmem();
sparse_init();
Index: linux-work/arch/powerpc/kernel/prom.c
===================================================================
--- linux-work.orig/arch/powerpc/kernel/prom.c 2009-06-03 11:48:22.000000000 +1000
+++ linux-work/arch/powerpc/kernel/prom.c 2009-06-03 11:52:00.000000000 +1000
@@ -585,7 +585,7 @@ static void __init check_cpu_pa_features
ibm_pa_features, ARRAY_SIZE(ibm_pa_features));
}
-#ifdef CONFIG_PPC64
+#ifdef CONFIG_PPC_STD_MMU_64
static void __init check_cpu_slb_size(unsigned long node)
{
u32 *slb_size_ptr;
More information about the Linuxppc-dev
mailing list