[RFC PATCH 4/6] powerpc/powernv: Convert pointers to physical addresses in OPAL call args
Russell Currey
ruscur at russell.cc
Mon Nov 7 11:00:50 AEDT 2022
On Sat, 2022-11-05 at 04:27 +1100, Andrew Donnellan wrote:
> A number of OPAL calls take addresses as arguments (e.g. buffers with
> strings to print, etc). These addresses need to be physical
> addresses, as
> OPAL runs in real mode.
>
> Since the hardware ignores the top two bits of the address in real
> mode,
> passing addresses in the kernel's linear map works fine even if we
> don't
> wrap them in __pa().
>
> With VMAP_STACK, however, we're going to have to use
> vmalloc_to_phys() to
> convert addresses from the stack into an address that OPAL can use.
>
> Introduce a new macro, stack_pa(), that uses vmalloc_to_phys() for
> addresses in the vmalloc area, and __pa() for linear map addresses.
> Add it
> to all the existing callsites where we pass pointers to OPAL.
>
> Signed-off-by: Andrew Donnellan <ajd at linux.ibm.com>
> ---
> arch/powerpc/kvm/book3s_hv_builtin.c | 2 +-
> arch/powerpc/platforms/powernv/eeh-powernv.c | 20 ++++++-----
> arch/powerpc/platforms/powernv/ocxl.c | 3 +-
> arch/powerpc/platforms/powernv/opal-core.c | 4 +--
> arch/powerpc/platforms/powernv/opal-dump.c | 6 ++--
> arch/powerpc/platforms/powernv/opal-elog.c | 10 +++---
> arch/powerpc/platforms/powernv/opal-fadump.c | 12 +++----
> arch/powerpc/platforms/powernv/opal-flash.c | 5 +--
> arch/powerpc/platforms/powernv/opal-hmi.c | 3 +-
> arch/powerpc/platforms/powernv/opal-irqchip.c | 4 +--
> arch/powerpc/platforms/powernv/opal-lpc.c | 8 ++---
> arch/powerpc/platforms/powernv/opal-nvram.c | 4 +--
> arch/powerpc/platforms/powernv/opal-power.c | 4 +--
> .../powerpc/platforms/powernv/opal-powercap.c | 2 +-
> arch/powerpc/platforms/powernv/opal-prd.c | 6 ++--
> arch/powerpc/platforms/powernv/opal-psr.c | 2 +-
> arch/powerpc/platforms/powernv/opal-rtc.c | 2 +-
> arch/powerpc/platforms/powernv/opal-secvar.c | 9 +++--
> arch/powerpc/platforms/powernv/opal-sensor.c | 4 +--
> .../powerpc/platforms/powernv/opal-sysparam.c | 4 +--
> arch/powerpc/platforms/powernv/opal-xscom.c | 2 +-
> arch/powerpc/platforms/powernv/opal.c | 16 ++++-----
> arch/powerpc/platforms/powernv/pci-ioda.c | 14 ++++----
> arch/powerpc/platforms/powernv/pci.c | 25 +++++++-------
> arch/powerpc/platforms/powernv/setup.c | 2 +-
> arch/powerpc/platforms/powernv/smp.c | 2 +-
> arch/powerpc/sysdev/xics/icp-opal.c | 2 +-
> arch/powerpc/sysdev/xics/ics-opal.c | 8 ++---
> arch/powerpc/sysdev/xive/native.c | 33 ++++++++++++-----
> --
> drivers/char/ipmi/ipmi_powernv.c | 6 ++--
> drivers/char/powernv-op-panel.c | 2 +-
> drivers/i2c/busses/i2c-opal.c | 2 +-
> drivers/leds/leds-powernv.c | 6 ++--
> drivers/mtd/devices/powernv_flash.c | 4 +--
> drivers/rtc/rtc-opal.c | 4 +--
> 35 files changed, 135 insertions(+), 107 deletions(-)
>
> diff --git a/arch/powerpc/kvm/book3s_hv_builtin.c
> b/arch/powerpc/kvm/book3s_hv_builtin.c
> index da85f046377a..dba041d659d2 100644
> --- a/arch/powerpc/kvm/book3s_hv_builtin.c
> +++ b/arch/powerpc/kvm/book3s_hv_builtin.c
> @@ -414,7 +414,7 @@ static long kvmppc_read_one_intr(bool *again)
> xics_phys = local_paca->kvm_hstate.xics_phys;
> rc = 0;
> if (!xics_phys)
> - rc = opal_int_get_xirr(&xirr, false);
> + rc = opal_int_get_xirr(stack_pa(&xirr), false);
> else
> xirr = __raw_rm_readl(xics_phys + XICS_XIRR);
> if (rc < 0)
> diff --git a/arch/powerpc/platforms/powernv/eeh-powernv.c
> b/arch/powerpc/platforms/powernv/eeh-powernv.c
> index a83cb679dd59..f069aa28f969 100644
> --- a/arch/powerpc/platforms/powernv/eeh-powernv.c
> +++ b/arch/powerpc/platforms/powernv/eeh-powernv.c
> @@ -517,7 +517,7 @@ static void pnv_eeh_get_phb_diag(struct eeh_pe
> *pe)
> struct pnv_phb *phb = pe->phb->private_data;
> s64 rc;
>
> - rc = opal_pci_get_phb_diag_data2(phb->opal_id, pe->data,
> + rc = opal_pci_get_phb_diag_data2(phb->opal_id, stack_pa(pe-
> >data),
> phb->diag_data_size);
> if (rc != OPAL_SUCCESS)
> pr_warn("%s: Failure %lld getting PHB#%x diag-
> data\n",
> @@ -534,8 +534,8 @@ static int pnv_eeh_get_phb_state(struct eeh_pe
> *pe)
>
> rc = opal_pci_eeh_freeze_status(phb->opal_id,
> pe->addr,
> - &fstate,
> - &pcierr,
> + stack_pa(&fstate),
> + stack_pa(&pcierr),
> NULL);
> if (rc != OPAL_SUCCESS) {
> pr_warn("%s: Failure %lld getting PHB#%x state\n",
> @@ -594,8 +594,8 @@ static int pnv_eeh_get_pe_state(struct eeh_pe
> *pe)
> } else {
> rc = opal_pci_eeh_freeze_status(phb->opal_id,
> pe->addr,
> - &fstate,
> - &pcierr,
> + stack_pa(&fstate),
> + stack_pa(&pcierr),
> NULL);
> if (rc != OPAL_SUCCESS) {
> pr_warn("%s: Failure %lld getting PHB#%x-PE%x
> state\n",
> @@ -1287,7 +1287,8 @@ static void
> pnv_eeh_get_and_dump_hub_diag(struct pci_controller *hose)
> (struct OpalIoP7IOCErrorData*)phb->diag_data;
> long rc;
>
> - rc = opal_pci_get_hub_diag_data(phb->hub_id, data,
> sizeof(*data));
> + rc = opal_pci_get_hub_diag_data(phb->hub_id, stack_pa(data),
> + sizeof(*data));
> if (rc != OPAL_SUCCESS) {
> pr_warn("%s: Failed to get HUB#%llx diag-data
> (%ld)\n",
> __func__, phb->hub_id, rc);
> @@ -1432,7 +1433,9 @@ static int pnv_eeh_next_error(struct eeh_pe
> **pe)
> continue;
>
> rc = opal_pci_next_error(phb->opal_id,
> - &frozen_pe_no, &err_type,
> &severity);
> + stack_pa(&frozen_pe_no),
> + stack_pa(&err_type),
> + stack_pa(&severity));
> if (rc != OPAL_SUCCESS) {
> pr_devel("%s: Invalid return value on "
> "PHB#%x (0x%lx) from
> opal_pci_next_error",
> @@ -1511,7 +1514,8 @@ static int pnv_eeh_next_error(struct eeh_pe
> **pe)
>
> /* Dump PHB diag-data */
> rc = opal_pci_get_phb_diag_data2(phb-
> >opal_id,
> - phb->diag_data, phb-
> >diag_data_size);
> +
> stack_pa(phb->diag_data),
> + phb-
> >diag_data_size);
> if (rc == OPAL_SUCCESS)
> pnv_pci_dump_phb_diag_data(ho
> se,
> phb-
> >diag_data);
> diff --git a/arch/powerpc/platforms/powernv/ocxl.c
> b/arch/powerpc/platforms/powernv/ocxl.c
> index 629067781cec..33d5b85df078 100644
> --- a/arch/powerpc/platforms/powernv/ocxl.c
> +++ b/arch/powerpc/platforms/powernv/ocxl.c
> @@ -450,7 +450,8 @@ int pnv_ocxl_spa_setup(struct pci_dev *dev, void
> *spa_mem, int PE_mask,
> return -ENOMEM;
>
> bdfn = (dev->bus->number << 8) | dev->devfn;
> - rc = opal_npu_spa_setup(phb->opal_id, bdfn,
> virt_to_phys(spa_mem),
> + rc = opal_npu_spa_setup(phb->opal_id, bdfn,
> + (uint64_t)stack_pa(spa_mem),
> PE_mask);
> if (rc) {
> dev_err(&dev->dev, "Can't setup Shared Process Area:
> %d\n", rc);
> diff --git a/arch/powerpc/platforms/powernv/opal-core.c
> b/arch/powerpc/platforms/powernv/opal-core.c
> index bb7657115f1d..6a4a1fd9ec33 100644
> --- a/arch/powerpc/platforms/powernv/opal-core.c
> +++ b/arch/powerpc/platforms/powernv/opal-core.c
> @@ -475,7 +475,7 @@ static void __init opalcore_config_init(void)
> }
>
> /* Get OPAL metadata */
> - ret = opal_mpipl_query_tag(OPAL_MPIPL_TAG_OPAL, &addr);
> + ret = opal_mpipl_query_tag(OPAL_MPIPL_TAG_OPAL,
> stack_pa(&addr));
> if ((ret != OPAL_SUCCESS) || !addr) {
> pr_err("Failed to get OPAL metadata (%d)\n", ret);
> goto error_out;
> @@ -486,7 +486,7 @@ static void __init opalcore_config_init(void)
> opalc_metadata = __va(addr);
>
> /* Get OPAL CPU metadata */
> - ret = opal_mpipl_query_tag(OPAL_MPIPL_TAG_CPU, &addr);
> + ret = opal_mpipl_query_tag(OPAL_MPIPL_TAG_CPU,
> stack_pa(&addr));
> if ((ret != OPAL_SUCCESS) || !addr) {
> pr_err("Failed to get OPAL CPU metadata (%d)\n",
> ret);
> goto error_out;
> diff --git a/arch/powerpc/platforms/powernv/opal-dump.c
> b/arch/powerpc/platforms/powernv/opal-dump.c
> index 16c5860f1372..9d48257988bc 100644
> --- a/arch/powerpc/platforms/powernv/opal-dump.c
> +++ b/arch/powerpc/platforms/powernv/opal-dump.c
> @@ -223,9 +223,9 @@ static int64_t dump_read_info(uint32_t *dump_id,
> uint32_t *dump_size, uint32_t *
>
> type = cpu_to_be32(0xffffffff);
>
> - rc = opal_dump_info2(&id, &size, &type);
> + rc = opal_dump_info2(stack_pa(&id), stack_pa(&size),
> stack_pa(&type));
> if (rc == OPAL_PARAMETER)
> - rc = opal_dump_info(&id, &size);
> + rc = opal_dump_info(stack_pa(&id), stack_pa(&size));
>
> if (rc) {
> pr_warn("%s: Failed to get dump info (%d)\n",
> @@ -262,7 +262,7 @@ static int64_t dump_read_data(struct dump_obj
> *dump)
> }
>
> /* First entry address */
> - addr = __pa(list);
> + addr = (uint64_t)stack_pa(list);
>
> /* Fetch data */
> rc = OPAL_BUSY_EVENT;
> diff --git a/arch/powerpc/platforms/powernv/opal-elog.c
> b/arch/powerpc/platforms/powernv/opal-elog.c
> index 554fdd7f88b8..8750d7729e7c 100644
> --- a/arch/powerpc/platforms/powernv/opal-elog.c
> +++ b/arch/powerpc/platforms/powernv/opal-elog.c
> @@ -169,7 +169,7 @@ static ssize_t raw_attr_read(struct file *filep,
> struct kobject *kobj,
> if (!elog->buffer)
> return -EIO;
>
> - opal_rc = opal_read_elog(__pa(elog->buffer),
> + opal_rc = opal_read_elog((uint64_t)stack_pa(elog-
> >buffer),
> elog->size, elog->id);
> if (opal_rc != OPAL_SUCCESS) {
> pr_err_ratelimited("ELOG: log read failed for
> log-id=%llx\n",
> @@ -212,8 +212,8 @@ static void create_elog_obj(uint64_t id, size_t
> size, uint64_t type)
> elog->buffer = kzalloc(elog->size, GFP_KERNEL);
>
> if (elog->buffer) {
> - rc = opal_read_elog(__pa(elog->buffer),
> - elog->size, elog->id);
> + rc = opal_read_elog((uint64_t)stack_pa(elog->buffer),
> + elog->size, elog->id);
> if (rc != OPAL_SUCCESS) {
> pr_err("ELOG: log read failed for log-
> id=%llx\n",
> elog->id);
> @@ -270,7 +270,9 @@ static irqreturn_t elog_event(int irq, void
> *data)
> char name[2+16+1];
> struct kobject *kobj;
>
> - rc = opal_get_elog_size(&id, &size, &type);
> + rc = opal_get_elog_size(stack_pa(&id),
> + stack_pa(&size),
> + stack_pa(&type));
> if (rc != OPAL_SUCCESS) {
> pr_err("ELOG: OPAL log info read failed\n");
> return IRQ_HANDLED;
> diff --git a/arch/powerpc/platforms/powernv/opal-fadump.c
> b/arch/powerpc/platforms/powernv/opal-fadump.c
> index 964f464b1b0e..d4bdf4540c1f 100644
> --- a/arch/powerpc/platforms/powernv/opal-fadump.c
> +++ b/arch/powerpc/platforms/powernv/opal-fadump.c
> @@ -47,7 +47,7 @@ void __init opal_fadump_dt_scan(struct fw_dump
> *fadump_conf, u64 node)
> if (!prop)
> return;
>
> - ret = opal_mpipl_query_tag(OPAL_MPIPL_TAG_KERNEL, &addr);
> + ret = opal_mpipl_query_tag(OPAL_MPIPL_TAG_KERNEL,
> stack_pa(&addr));
> if ((ret != OPAL_SUCCESS) || !addr) {
> pr_debug("Could not get Kernel metadata (%lld)\n",
> ret);
> return;
> @@ -63,7 +63,7 @@ void __init opal_fadump_dt_scan(struct fw_dump
> *fadump_conf, u64 node)
> if (be16_to_cpu(opal_fdm_active->registered_regions) == 0)
> return;
>
> - ret = opal_mpipl_query_tag(OPAL_MPIPL_TAG_BOOT_MEM, &addr);
> + ret = opal_mpipl_query_tag(OPAL_MPIPL_TAG_BOOT_MEM,
> stack_pa(&addr));
> if ((ret != OPAL_SUCCESS) || !addr) {
> pr_err("Failed to get boot memory tag (%lld)\n",
> ret);
> return;
> @@ -607,7 +607,7 @@ static void opal_fadump_trigger(struct
> fadump_crash_info_header *fdh,
> */
> fdh->crashing_cpu = (u32)mfspr(SPRN_PIR);
>
> - rc = opal_cec_reboot2(OPAL_REBOOT_MPIPL, msg);
> + rc = opal_cec_reboot2(OPAL_REBOOT_MPIPL, stack_pa(msg));
Hi Andrew, some compilers cranky here:
/linux/arch/powerpc/platforms/powernv/opal-fadump.c:610:52: error:
passing 'const char *' to parameter of type 'void *' discards
qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
rc = opal_cec_reboot2(OPAL_REBOOT_MPIPL, stack_pa(msg));
^~~
/linux/arch/powerpc/include/asm/book3s/64/stack.h:56:45: note: passing
argument to parameter 'ptr' here
static __always_inline void *stack_pa(void *ptr)
> if (rc == OPAL_UNSUPPORTED) {
> pr_emerg("Reboot type %d not supported.\n",
> OPAL_REBOOT_MPIPL);
> @@ -690,7 +690,7 @@ void __init opal_fadump_dt_scan(struct fw_dump
> *fadump_conf, u64 node)
> if (!prop)
> return;
>
> - ret = opal_mpipl_query_tag(OPAL_MPIPL_TAG_KERNEL, &be_addr);
> + ret = opal_mpipl_query_tag(OPAL_MPIPL_TAG_KERNEL,
> stack_pa(&be_addr));
> if ((ret != OPAL_SUCCESS) || !be_addr) {
> pr_err("Failed to get Kernel metadata (%lld)\n",
> ret);
> return;
> @@ -712,8 +712,8 @@ void __init opal_fadump_dt_scan(struct fw_dump
> *fadump_conf, u64 node)
> return;
> }
>
> - ret = opal_mpipl_query_tag(OPAL_MPIPL_TAG_CPU, &be_addr);
> - if (be_addr) {
> + ret = opal_mpipl_query_tag(OPAL_MPIPL_TAG_CPU,
> stack_pa(&be_addr));
> + if (addr) {
> addr = be64_to_cpu(be_addr);
> pr_debug("CPU metadata addr: %llx\n", addr);
> opal_cpu_metadata = __va(addr);
> diff --git a/arch/powerpc/platforms/powernv/opal-flash.c
> b/arch/powerpc/platforms/powernv/opal-flash.c
> index d5ea04e8e4c5..fb989707ce94 100644
> --- a/arch/powerpc/platforms/powernv/opal-flash.c
> +++ b/arch/powerpc/platforms/powernv/opal-flash.c
> @@ -134,7 +134,8 @@ static inline void opal_flash_validate(void)
> __be32 size = cpu_to_be32(validate_flash_data.buf_size);
> __be32 result;
>
> - ret = opal_validate_flash(__pa(buf), &size, &result);
> + ret = opal_validate_flash((uint64_t)stack_pa(buf),
> stack_pa(&size),
> + stack_pa(&result));
>
> validate_flash_data.status = ret;
> validate_flash_data.buf_size = be32_to_cpu(size);
> @@ -290,7 +291,7 @@ static int opal_flash_update(int op)
> goto invalid_img;
>
> /* First entry address */
> - addr = __pa(list);
> + addr = (unsigned long)stack_pa(list);
>
> flash:
> rc = opal_update_flash(addr);
> diff --git a/arch/powerpc/platforms/powernv/opal-hmi.c
> b/arch/powerpc/platforms/powernv/opal-hmi.c
> index f0c1830deb51..a7df32dfd090 100644
> --- a/arch/powerpc/platforms/powernv/opal-hmi.c
> +++ b/arch/powerpc/platforms/powernv/opal-hmi.c
> @@ -303,7 +303,8 @@ static void hmi_event_handler(struct work_struct
> *work)
>
> if (unrecoverable) {
> /* Pull all HMI events from OPAL before we panic. */
> - while (opal_get_msg(__pa(&msg), sizeof(msg)) ==
> OPAL_SUCCESS) {
> + while (opal_get_msg((uint64_t)stack_pa(&msg),
> + sizeof(msg)) == OPAL_SUCCESS) {
> u32 type;
>
> type = be32_to_cpu(msg.msg_type);
> diff --git a/arch/powerpc/platforms/powernv/opal-irqchip.c
> b/arch/powerpc/platforms/powernv/opal-irqchip.c
> index d55652b5f6fa..0af8e517884c 100644
> --- a/arch/powerpc/platforms/powernv/opal-irqchip.c
> +++ b/arch/powerpc/platforms/powernv/opal-irqchip.c
> @@ -60,7 +60,7 @@ void opal_handle_events(void)
> cond_resched();
> }
> last_outstanding_events = 0;
> - if (opal_poll_events(&events) != OPAL_SUCCESS)
> + if (opal_poll_events(stack_pa(&events)) != OPAL_SUCCESS)
> return;
> e = be64_to_cpu(events) & opal_event_irqchip.mask;
> if (e)
> @@ -123,7 +123,7 @@ static irqreturn_t opal_interrupt(int irq, void
> *data)
> {
> __be64 events;
>
> - opal_handle_interrupt(virq_to_hw(irq), &events);
> + opal_handle_interrupt(virq_to_hw(irq), stack_pa(&events));
> last_outstanding_events = be64_to_cpu(events);
> if (opal_have_pending_events())
> opal_wake_poller();
> diff --git a/arch/powerpc/platforms/powernv/opal-lpc.c
> b/arch/powerpc/platforms/powernv/opal-lpc.c
> index d129d6d45a50..01114ab629dc 100644
> --- a/arch/powerpc/platforms/powernv/opal-lpc.c
> +++ b/arch/powerpc/platforms/powernv/opal-lpc.c
> @@ -28,7 +28,7 @@ static u8 opal_lpc_inb(unsigned long port)
>
> if (opal_lpc_chip_id < 0 || port > 0xffff)
> return 0xff;
> - rc = opal_lpc_read(opal_lpc_chip_id, OPAL_LPC_IO, port,
> &data, 1);
> + rc = opal_lpc_read(opal_lpc_chip_id, OPAL_LPC_IO, port,
> stack_pa(&data), 1);
> return rc ? 0xff : be32_to_cpu(data);
> }
>
> @@ -41,7 +41,7 @@ static __le16 __opal_lpc_inw(unsigned long port)
> return 0xffff;
> if (port & 1)
> return (__le16)opal_lpc_inb(port) << 8 |
> opal_lpc_inb(port + 1);
> - rc = opal_lpc_read(opal_lpc_chip_id, OPAL_LPC_IO, port,
> &data, 2);
> + rc = opal_lpc_read(opal_lpc_chip_id, OPAL_LPC_IO, port,
> stack_pa(&data), 2);
> return rc ? 0xffff : be32_to_cpu(data);
> }
> static u16 opal_lpc_inw(unsigned long port)
> @@ -61,7 +61,7 @@ static __le32 __opal_lpc_inl(unsigned long port)
> (__le32)opal_lpc_inb(port + 1) << 16 |
> (__le32)opal_lpc_inb(port + 2) << 8 |
> opal_lpc_inb(port + 3);
> - rc = opal_lpc_read(opal_lpc_chip_id, OPAL_LPC_IO, port,
> &data, 4);
> + rc = opal_lpc_read(opal_lpc_chip_id, OPAL_LPC_IO, port,
> stack_pa(&data), 4);
> return rc ? 0xffffffff : be32_to_cpu(data);
> }
>
> @@ -208,7 +208,7 @@ static ssize_t lpc_debug_read(struct file *filp,
> char __user *ubuf,
> len = 2;
> }
> rc = opal_lpc_read(opal_lpc_chip_id, lpc->lpc_type,
> pos,
> - &data, len);
> + stack_pa(&data), len);
> if (rc)
> return -ENXIO;
>
> diff --git a/arch/powerpc/platforms/powernv/opal-nvram.c
> b/arch/powerpc/platforms/powernv/opal-nvram.c
> index 380bc2d7ebbf..d92e5070baf2 100644
> --- a/arch/powerpc/platforms/powernv/opal-nvram.c
> +++ b/arch/powerpc/platforms/powernv/opal-nvram.c
> @@ -33,7 +33,7 @@ static ssize_t opal_nvram_read(char *buf, size_t
> count, loff_t *index)
> off = *index;
> if ((off + count) > nvram_size)
> count = nvram_size - off;
> - rc = opal_read_nvram(__pa(buf), count, off);
> + rc = opal_read_nvram((uint64_t)stack_pa(buf), count, off);
> if (rc != OPAL_SUCCESS)
> return -EIO;
> *index += count;
> @@ -56,7 +56,7 @@ static ssize_t opal_nvram_write(char *buf, size_t
> count, loff_t *index)
> count = nvram_size - off;
>
> while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
> - rc = opal_write_nvram(__pa(buf), count, off);
> + rc = opal_write_nvram((uint64_t)stack_pa(buf), count,
> off);
> if (rc == OPAL_BUSY_EVENT) {
> if (in_interrupt() || irqs_disabled())
> mdelay(OPAL_BUSY_DELAY_MS);
> diff --git a/arch/powerpc/platforms/powernv/opal-power.c
> b/arch/powerpc/platforms/powernv/opal-power.c
> index db99ffcb7b82..6927bcd3630e 100644
> --- a/arch/powerpc/platforms/powernv/opal-power.c
> +++ b/arch/powerpc/platforms/powernv/opal-power.c
> @@ -31,7 +31,7 @@ static bool detect_epow(void)
> * to OPAL. OPAL returns EPOW info along with classes present.
> */
> epow_classes = cpu_to_be16(OPAL_SYSEPOW_MAX);
> - rc = opal_get_epow_status(opal_epow_status, &epow_classes);
> + rc = opal_get_epow_status(stack_pa(opal_epow_status),
> stack_pa(&epow_classes));
> if (rc != OPAL_SUCCESS) {
> pr_err("Failed to get EPOW event information\n");
> return false;
> @@ -59,7 +59,7 @@ static bool __init poweroff_pending(void)
> __be64 opal_dpo_timeout;
>
> /* Check for DPO event */
> - rc = opal_get_dpo_status(&opal_dpo_timeout);
> + rc = opal_get_dpo_status(stack_pa(&opal_dpo_timeout));
> if (rc == OPAL_SUCCESS) {
> pr_info("Existing DPO event detected.\n");
> return true;
> diff --git a/arch/powerpc/platforms/powernv/opal-powercap.c
> b/arch/powerpc/platforms/powernv/opal-powercap.c
> index 7bfe4cbeb35a..63e0e4427aea 100644
> --- a/arch/powerpc/platforms/powernv/opal-powercap.c
> +++ b/arch/powerpc/platforms/powernv/opal-powercap.c
> @@ -46,7 +46,7 @@ static ssize_t powercap_show(struct kobject *kobj,
> struct kobj_attribute *attr,
> if (ret)
> goto out_token;
>
> - ret = opal_get_powercap(pcap_attr->handle, token, (u32
> *)__pa(&pcap));
> + ret = opal_get_powercap(pcap_attr->handle, token, (u32
> *)stack_pa(&pcap));
> switch (ret) {
> case OPAL_ASYNC_COMPLETION:
> ret = opal_async_wait_response(token, &msg);
> diff --git a/arch/powerpc/platforms/powernv/opal-prd.c
> b/arch/powerpc/platforms/powernv/opal-prd.c
> index 113bdb151f68..649e8510ec00 100644
> --- a/arch/powerpc/platforms/powernv/opal-prd.c
> +++ b/arch/powerpc/platforms/powernv/opal-prd.c
> @@ -234,7 +234,7 @@ static ssize_t opal_prd_write(struct file *file,
> const char __user *buf,
> if (IS_ERR(msg))
> return PTR_ERR(msg);
>
> - rc = opal_prd_msg(msg);
> + rc = opal_prd_msg(stack_pa(msg));
> if (rc) {
> pr_warn("write: opal_prd_msg returned %d\n", rc);
> size = -EIO;
> @@ -252,7 +252,7 @@ static int opal_prd_release(struct inode *inode,
> struct file *file)
> msg.size = cpu_to_be16(sizeof(msg));
> msg.type = OPAL_PRD_MSG_TYPE_FINI;
>
> - opal_prd_msg((struct opal_prd_msg *)&msg);
> + opal_prd_msg((struct opal_prd_msg *)stack_pa(&msg));
>
> atomic_xchg(&prd_usage, 0);
>
> @@ -281,7 +281,7 @@ static long opal_prd_ioctl(struct file *file,
> unsigned int cmd,
> return -EFAULT;
>
> scom.rc = opal_xscom_read(scom.chip, scom.addr,
> - (__be64 *)&scom.data);
> + (__be64
> *)stack_pa(&scom.data));
> scom.data = be64_to_cpu(scom.data);
> pr_devel("ioctl SCOM_READ: chip %llx addr %016llx
> data %016llx rc %lld\n",
> scom.chip, scom.addr, scom.data,
> scom.rc);
> diff --git a/arch/powerpc/platforms/powernv/opal-psr.c
> b/arch/powerpc/platforms/powernv/opal-psr.c
> index 6441e17b6996..c37257b1ffe4 100644
> --- a/arch/powerpc/platforms/powernv/opal-psr.c
> +++ b/arch/powerpc/platforms/powernv/opal-psr.c
> @@ -40,7 +40,7 @@ static ssize_t psr_show(struct kobject *kobj,
> struct kobj_attribute *attr,
> goto out_token;
>
> ret = opal_get_power_shift_ratio(psr_attr->handle, token,
> - (u32 *)__pa(&psr));
> + (u32 *)stack_pa(&psr));
> switch (ret) {
> case OPAL_ASYNC_COMPLETION:
> ret = opal_async_wait_response(token, &msg);
> diff --git a/arch/powerpc/platforms/powernv/opal-rtc.c
> b/arch/powerpc/platforms/powernv/opal-rtc.c
> index a9bcf9217e64..891651455066 100644
> --- a/arch/powerpc/platforms/powernv/opal-rtc.c
> +++ b/arch/powerpc/platforms/powernv/opal-rtc.c
> @@ -43,7 +43,7 @@ time64_t __init opal_get_boot_time(void)
> return 0;
>
> while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
> - rc = opal_rtc_read(&__y_m_d, &__h_m_s_ms);
> + rc = opal_rtc_read(stack_pa(&__y_m_d),
> stack_pa(&__h_m_s_ms));
> if (rc == OPAL_BUSY_EVENT) {
> mdelay(OPAL_BUSY_DELAY_MS);
> opal_poll_events(NULL);
> diff --git a/arch/powerpc/platforms/powernv/opal-secvar.c
> b/arch/powerpc/platforms/powernv/opal-secvar.c
> index 14133e120bdd..a44df58d565d 100644
> --- a/arch/powerpc/platforms/powernv/opal-secvar.c
> +++ b/arch/powerpc/platforms/powernv/opal-secvar.c
> @@ -64,7 +64,8 @@ static int opal_get_variable(const char *key,
> uint64_t ksize,
>
> *dsize = cpu_to_be64(*dsize);
>
> - rc = opal_secvar_get(key, ksize, data, dsize);
> + rc = opal_secvar_get(stack_pa(key), ksize, stack_pa(data),
> + stack_pa(dsize));
>
> *dsize = be64_to_cpu(*dsize);
>
> @@ -81,7 +82,8 @@ static int opal_get_next_variable(const char *key,
> uint64_t *keylen,
>
> *keylen = cpu_to_be64(*keylen);
>
> - rc = opal_secvar_get_next(key, keylen, keybufsize);
> + rc = opal_secvar_get_next(stack_pa(key), stack_pa(keylen),
> + keybufsize);
>
> *keylen = be64_to_cpu(*keylen);
>
> @@ -96,7 +98,8 @@ static int opal_set_variable(const char *key,
> uint64_t ksize, u8 *data,
> if (!key || !data)
> return -EINVAL;
>
> - rc = opal_secvar_enqueue_update(key, ksize, data, dsize);
> + rc = opal_secvar_enqueue_update(stack_pa(key), ksize,
> stack_pa(data),
> + dsize);
>
> return opal_status_to_err(rc);
> }
> diff --git a/arch/powerpc/platforms/powernv/opal-sensor.c
> b/arch/powerpc/platforms/powernv/opal-sensor.c
> index 3192c614a1e1..ff5f78bb419b 100644
> --- a/arch/powerpc/platforms/powernv/opal-sensor.c
> +++ b/arch/powerpc/platforms/powernv/opal-sensor.c
> @@ -25,7 +25,7 @@ int opal_get_sensor_data(u32 sensor_hndl, u32
> *sensor_data)
> if (token < 0)
> return token;
>
> - ret = opal_sensor_read(sensor_hndl, token, &data);
> + ret = opal_sensor_read(sensor_hndl, token, stack_pa(&data));
> switch (ret) {
> case OPAL_ASYNC_COMPLETION:
> ret = opal_async_wait_response(token, &msg);
> @@ -78,7 +78,7 @@ int opal_get_sensor_data_u64(u32 sensor_hndl, u64
> *sensor_data)
> if (token < 0)
> return token;
>
> - ret = opal_sensor_read_u64(sensor_hndl, token, &data);
> + ret = opal_sensor_read_u64(sensor_hndl, token,
> stack_pa(&data));
> switch (ret) {
> case OPAL_ASYNC_COMPLETION:
> ret = opal_async_wait_response(token, &msg);
> diff --git a/arch/powerpc/platforms/powernv/opal-sysparam.c
> b/arch/powerpc/platforms/powernv/opal-sysparam.c
> index a12312afe4ef..3882b31a9e61 100644
> --- a/arch/powerpc/platforms/powernv/opal-sysparam.c
> +++ b/arch/powerpc/platforms/powernv/opal-sysparam.c
> @@ -41,7 +41,7 @@ static ssize_t opal_get_sys_param(u32 param_id, u32
> length, void *buffer)
> goto out;
> }
>
> - ret = opal_get_param(token, param_id, (u64)buffer, length);
> + ret = opal_get_param(token, param_id, (u64)stack_pa(buffer),
> length);
> if (ret != OPAL_ASYNC_COMPLETION) {
> ret = opal_error_code(ret);
> goto out_token;
> @@ -76,7 +76,7 @@ static int opal_set_sys_param(u32 param_id, u32
> length, void *buffer)
> goto out;
> }
>
> - ret = opal_set_param(token, param_id, (u64)buffer, length);
> + ret = opal_set_param(token, param_id, (u64)stack_pa(buffer),
> length);
>
> if (ret != OPAL_ASYNC_COMPLETION) {
> ret = opal_error_code(ret);
> diff --git a/arch/powerpc/platforms/powernv/opal-xscom.c
> b/arch/powerpc/platforms/powernv/opal-xscom.c
> index 6b4eed2ef4fa..b318e2ef4ba2 100644
> --- a/arch/powerpc/platforms/powernv/opal-xscom.c
> +++ b/arch/powerpc/platforms/powernv/opal-xscom.c
> @@ -58,7 +58,7 @@ static int opal_scom_read(uint32_t chip, uint64_t
> addr, u64 reg, u64 *value)
> __be64 v;
>
> reg = opal_scom_unmangle(addr + reg);
> - rc = opal_xscom_read(chip, reg, (__be64 *)__pa(&v));
> + rc = opal_xscom_read(chip, reg, (__be64 *)stack_pa(&v));
> if (rc) {
> *value = 0xfffffffffffffffful;
> return -EIO;
> diff --git a/arch/powerpc/platforms/powernv/opal.c
> b/arch/powerpc/platforms/powernv/opal.c
> index cdf3838f08d3..ada336d77e64 100644
> --- a/arch/powerpc/platforms/powernv/opal.c
> +++ b/arch/powerpc/platforms/powernv/opal.c
> @@ -357,7 +357,7 @@ static void opal_handle_message(void)
> s64 ret;
> u32 type;
>
> - ret = opal_get_msg(__pa(opal_msg), opal_msg_size);
> + ret = opal_get_msg((uint64_t)stack_pa(opal_msg),
> opal_msg_size);
> /* No opal message pending. */
> if (ret == OPAL_RESOURCE)
> return;
> @@ -431,11 +431,11 @@ int opal_get_chars(uint32_t vtermno, char *buf,
> int count)
>
> if (!opal.entry)
> return -ENODEV;
> - opal_poll_events(&evt);
> + opal_poll_events(stack_pa(&evt));
> if ((be64_to_cpu(evt) & OPAL_EVENT_CONSOLE_INPUT) == 0)
> return 0;
> len = cpu_to_be64(count);
> - rc = opal_console_read(vtermno, &len, buf);
> + rc = opal_console_read(vtermno, stack_pa(&len),
> stack_pa(buf));
> if (rc == OPAL_SUCCESS)
> return be64_to_cpu(len);
> return 0;
> @@ -453,7 +453,7 @@ static int __opal_put_chars(uint32_t vtermno,
> const char *data, int total_len, b
>
> if (atomic)
> spin_lock_irqsave(&opal_write_lock, flags);
> - rc = opal_console_write_buffer_space(vtermno, &olen);
> + rc = opal_console_write_buffer_space(vtermno,
> stack_pa(&olen));
> if (rc || be64_to_cpu(olen) < total_len) {
> /* Closed -> drop characters */
> if (rc)
> @@ -465,7 +465,7 @@ static int __opal_put_chars(uint32_t vtermno,
> const char *data, int total_len, b
>
> /* Should not get a partial write here because space is
> available. */
> olen = cpu_to_be64(total_len);
> - rc = opal_console_write(vtermno, &olen, data);
> + rc = opal_console_write(vtermno, stack_pa(&olen),
> stack_pa((void *)data));
> if (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
> if (rc == OPAL_BUSY_EVENT)
> opal_poll_events(NULL);
> @@ -527,7 +527,7 @@ static s64 __opal_flush_console(uint32_t vtermno)
> */
> WARN_ONCE(1, "opal: OPAL_CONSOLE_FLUSH missing.\n");
>
> - opal_poll_events(&evt);
> + opal_poll_events(stack_pa(&evt));
> if (!(be64_to_cpu(evt) & OPAL_EVENT_CONSOLE_OUTPUT))
> return OPAL_SUCCESS;
> return OPAL_BUSY;
> @@ -647,7 +647,7 @@ void __noreturn pnv_platform_error_reboot(struct
> pt_regs *regs, const char *msg)
> * Don't bother to shut things down because this will
> * xstop the system.
> */
> - if (opal_cec_reboot2(OPAL_REBOOT_PLATFORM_ERROR, msg)
> + if (opal_cec_reboot2(OPAL_REBOOT_PLATFORM_ERROR,
> stack_pa((void *)msg))
> == OPAL_UNSUPPORTED)
> {
> pr_emerg("Reboot type %d not supported for %s\n",
> OPAL_REBOOT_PLATFORM_ERROR, msg);
> @@ -720,7 +720,7 @@ int opal_hmi_exception_early2(struct pt_regs
> *regs)
> * Check 64-bit flag mask to find out if an event was
> generated,
> * and whether TB is still valid or not etc.
> */
> - rc = opal_handle_hmi2(&out_flags);
> + rc = opal_handle_hmi2(stack_pa(&out_flags));
> if (rc != OPAL_SUCCESS)
> return 0;
>
> diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c
> b/arch/powerpc/platforms/powernv/pci-ioda.c
> index 5c144c05cbfd..4d85e8253f94 100644
> --- a/arch/powerpc/platforms/powernv/pci-ioda.c
> +++ b/arch/powerpc/platforms/powernv/pci-ioda.c
> @@ -628,7 +628,8 @@ static int pnv_ioda_get_pe_state(struct pnv_phb
> *phb, int pe_no)
>
> /* Check the master PE */
> rc = opal_pci_eeh_freeze_status(phb->opal_id, pe_no,
> - &state, &pcierr, NULL);
> + stack_pa(&state),
> + stack_pa(&pcierr), NULL);
> if (rc != OPAL_SUCCESS) {
> pr_warn("%s: Failure %lld getting "
> "PHB#%x-PE#%x state\n",
> @@ -644,8 +645,8 @@ static int pnv_ioda_get_pe_state(struct pnv_phb
> *phb, int pe_no)
> list_for_each_entry(slave, &pe->slaves, list) {
> rc = opal_pci_eeh_freeze_status(phb->opal_id,
> slave->pe_number,
> - &fstate,
> - &pcierr,
> + stack_pa(&fstate),
> + stack_pa(&pcierr),
> NULL);
> if (rc != OPAL_SUCCESS) {
> pr_warn("%s: Failure %lld getting "
> @@ -2061,7 +2062,7 @@ static int __pnv_pci_ioda_msi_setup(struct
> pnv_phb *phb, struct pci_dev *dev,
> __be64 addr64;
>
> rc = opal_get_msi_64(phb->opal_id, pe->mve_number,
> xive_num, 1,
> - &addr64, &data);
> + stack_pa(&addr64),
> stack_pa(&data));
> if (rc) {
> pr_warn("%s: OPAL error %d getting 64-bit MSI
> data\n",
> pci_name(dev), rc);
> @@ -2073,7 +2074,7 @@ static int __pnv_pci_ioda_msi_setup(struct
> pnv_phb *phb, struct pci_dev *dev,
> __be32 addr32;
>
> rc = opal_get_msi_32(phb->opal_id, pe->mve_number,
> xive_num, 1,
> - &addr32, &data);
> + stack_pa(&addr32),
> stack_pa(&data));
> if (rc) {
> pr_warn("%s: OPAL error %d getting 32-bit MSI
> data\n",
> pci_name(dev), rc);
> @@ -2415,7 +2416,8 @@ static int pnv_pci_diag_data_set(void *data,
> u64 val)
> s64 ret;
>
> /* Retrieve the diag data from firmware */
> - ret = opal_pci_get_phb_diag_data2(phb->opal_id, phb-
> >diag_data,
> + ret = opal_pci_get_phb_diag_data2(phb->opal_id,
> + stack_pa(phb->diag_data),
> phb->diag_data_size);
> if (ret != OPAL_SUCCESS)
> return -EIO;
> diff --git a/arch/powerpc/platforms/powernv/pci.c
> b/arch/powerpc/platforms/powernv/pci.c
> index 233a50e65fce..0c21b5aa24f5 100644
> --- a/arch/powerpc/platforms/powernv/pci.c
> +++ b/arch/powerpc/platforms/powernv/pci.c
> @@ -84,7 +84,7 @@ int pnv_pci_get_device_tree(uint32_t phandle, void
> *buf, uint64_t len)
> if (!opal_check_token(OPAL_GET_DEVICE_TREE))
> return -ENXIO;
>
> - rc = opal_get_device_tree(phandle, (uint64_t)buf, len);
> + rc = opal_get_device_tree(phandle, (uint64_t)stack_pa(buf),
> len);
> if (rc < OPAL_SUCCESS)
> return -EIO;
>
> @@ -99,7 +99,7 @@ int pnv_pci_get_presence_state(uint64_t id, uint8_t
> *state)
> if (!opal_check_token(OPAL_PCI_GET_PRESENCE_STATE))
> return -ENXIO;
>
> - rc = opal_pci_get_presence_state(id, (uint64_t)state);
> + rc = opal_pci_get_presence_state(id,
> (uint64_t)stack_pa(state));
> if (rc != OPAL_SUCCESS)
> return -EIO;
>
> @@ -114,7 +114,7 @@ int pnv_pci_get_power_state(uint64_t id, uint8_t
> *state)
> if (!opal_check_token(OPAL_PCI_GET_POWER_STATE))
> return -ENXIO;
>
> - rc = opal_pci_get_power_state(id, (uint64_t)state);
> + rc = opal_pci_get_power_state(id, (uint64_t)stack_pa(state));
> if (rc != OPAL_SUCCESS)
> return -EIO;
>
> @@ -135,7 +135,7 @@ int pnv_pci_set_power_state(uint64_t id, uint8_t
> state, struct opal_msg *msg)
> if (unlikely(token < 0))
> return token;
>
> - rc = opal_pci_set_power_state(token, id, (uint64_t)&state);
> + rc = opal_pci_set_power_state(token, id,
> (uint64_t)stack_pa(&state));
> if (rc == OPAL_SUCCESS) {
> ret = 0;
> goto exit;
> @@ -493,7 +493,8 @@ static void pnv_pci_handle_eeh_config(struct
> pnv_phb *phb, u32 pe_no)
> spin_lock_irqsave(&phb->lock, flags);
>
> /* Fetch PHB diag-data */
> - rc = opal_pci_get_phb_diag_data2(phb->opal_id, phb-
> >diag_data,
> + rc = opal_pci_get_phb_diag_data2(phb->opal_id,
> + stack_pa(phb->diag_data),
> phb->diag_data_size);
> has_diag = (rc == OPAL_SUCCESS);
>
> @@ -554,8 +555,8 @@ static void pnv_pci_config_check_eeh(struct
> pci_dn *pdn)
> } else {
> rc = opal_pci_eeh_freeze_status(phb->opal_id,
> pe_no,
> - &fstate,
> - &pcierr,
> + stack_pa(&fstate),
> + stack_pa(&pcierr),
> NULL);
> if (rc) {
> pr_warn("%s: Failure %lld getting PHB#%x-
> PE#%x state\n",
> @@ -592,20 +593,22 @@ int pnv_pci_cfg_read(struct pci_dn *pdn,
> switch (size) {
> case 1: {
> u8 v8;
> - rc = opal_pci_config_read_byte(phb->opal_id, bdfn,
> where, &v8);
> + rc = opal_pci_config_read_byte(phb->opal_id, bdfn,
> where,
> + stack_pa(&v8));
> *val = (rc == OPAL_SUCCESS) ? v8 : 0xff;
> break;
> }
> case 2: {
> __be16 v16;
> rc = opal_pci_config_read_half_word(phb->opal_id,
> bdfn, where,
> - &v16);
> + stack_pa(&v16));
> *val = (rc == OPAL_SUCCESS) ? be16_to_cpu(v16) :
> 0xffff;
> break;
> }
> case 4: {
> __be32 v32;
> - rc = opal_pci_config_read_word(phb->opal_id, bdfn,
> where, &v32);
> + rc = opal_pci_config_read_word(phb->opal_id, bdfn,
> where,
> + stack_pa(&v32));
> *val = (rc == OPAL_SUCCESS) ? be32_to_cpu(v32) :
> 0xffffffff;
> break;
> }
> @@ -765,7 +768,7 @@ int pnv_pci_set_tunnel_bar(struct pci_dev *dev,
> u64 addr, int enable)
> return -ENXIO;
>
> mutex_lock(&tunnel_mutex);
> - rc = opal_pci_get_pbcq_tunnel_bar(phb->opal_id, &val);
> + rc = opal_pci_get_pbcq_tunnel_bar(phb->opal_id,
> stack_pa(&val));
> if (rc != OPAL_SUCCESS) {
> rc = -EIO;
> goto out;
> diff --git a/arch/powerpc/platforms/powernv/setup.c
> b/arch/powerpc/platforms/powernv/setup.c
> index 61ab2d38ff4b..aae6ad04c65f 100644
> --- a/arch/powerpc/platforms/powernv/setup.c
> +++ b/arch/powerpc/platforms/powernv/setup.c
> @@ -407,7 +407,7 @@ static void pnv_kexec_wait_secondaries_down(void)
>
> for (;;) {
> rc =
> opal_query_cpu_status(get_hard_smp_processor_id(i),
> - &status);
> +
> stack_pa(&status));
> if (rc != OPAL_SUCCESS || status !=
> OPAL_THREAD_STARTED)
> break;
> barrier();
> diff --git a/arch/powerpc/platforms/powernv/smp.c
> b/arch/powerpc/platforms/powernv/smp.c
> index 9e1a25398f98..2f70e0bf9873 100644
> --- a/arch/powerpc/platforms/powernv/smp.c
> +++ b/arch/powerpc/platforms/powernv/smp.c
> @@ -86,7 +86,7 @@ static int pnv_smp_kick_cpu(int nr)
> * first time. OPAL v3 allows us to query OPAL to know if it
> * has the CPUs, so we do that
> */
> - rc = opal_query_cpu_status(pcpu, &status);
> + rc = opal_query_cpu_status(pcpu, stack_pa(&status));
> if (rc != OPAL_SUCCESS) {
> pr_warn("OPAL Error %ld querying CPU %d state\n", rc,
> nr);
> return -ENODEV;
> diff --git a/arch/powerpc/sysdev/xics/icp-opal.c
> b/arch/powerpc/sysdev/xics/icp-opal.c
> index 4dae624b9f2f..a79b98349a1e 100644
> --- a/arch/powerpc/sysdev/xics/icp-opal.c
> +++ b/arch/powerpc/sysdev/xics/icp-opal.c
> @@ -53,7 +53,7 @@ static unsigned int icp_opal_get_xirr(void)
> return kvm_xirr;
>
> /* Then ask OPAL */
> - rc = opal_int_get_xirr(&hw_xirr, false);
> + rc = opal_int_get_xirr(stack_pa(&hw_xirr), false);
> if (rc < 0)
> return 0;
> return be32_to_cpu(hw_xirr);
> diff --git a/arch/powerpc/sysdev/xics/ics-opal.c
> b/arch/powerpc/sysdev/xics/ics-opal.c
> index 6cfbb4fac7fb..5bf54470b35d 100644
> --- a/arch/powerpc/sysdev/xics/ics-opal.c
> +++ b/arch/powerpc/sysdev/xics/ics-opal.c
> @@ -105,7 +105,7 @@ static int ics_opal_set_affinity(struct irq_data
> *d,
> if (hw_irq == XICS_IPI || hw_irq == XICS_IRQ_SPURIOUS)
> return -1;
>
> - rc = opal_get_xive(hw_irq, &oserver, &priority);
> + rc = opal_get_xive(hw_irq, stack_pa(&oserver),
> stack_pa(&priority));
> if (rc != OPAL_SUCCESS) {
> pr_err("%s: opal_get_xive(irq=%d [hw 0x%x]) error
> %lld\n",
> __func__, d->irq, hw_irq, rc);
> @@ -160,7 +160,7 @@ static int ics_opal_check(struct ics *ics,
> unsigned int hw_irq)
> return -EINVAL;
>
> /* Check if HAL knows about this interrupt */
> - rc = opal_get_xive(hw_irq, &server, &priority);
> + rc = opal_get_xive(hw_irq, stack_pa(&server),
> stack_pa(&priority));
> if (rc != OPAL_SUCCESS)
> return -ENXIO;
>
> @@ -174,7 +174,7 @@ static void ics_opal_mask_unknown(struct ics
> *ics, unsigned long vec)
> int8_t priority;
>
> /* Check if HAL knows about this interrupt */
> - rc = opal_get_xive(vec, &server, &priority);
> + rc = opal_get_xive(vec, stack_pa(&server),
> stack_pa(&priority));
> if (rc != OPAL_SUCCESS)
> return;
>
> @@ -188,7 +188,7 @@ static long ics_opal_get_server(struct ics *ics,
> unsigned long vec)
> int8_t priority;
>
> /* Check if HAL knows about this interrupt */
> - rc = opal_get_xive(vec, &server, &priority);
> + rc = opal_get_xive(vec, stack_pa(&server),
> stack_pa(&priority));
> if (rc != OPAL_SUCCESS)
> return -1;
> return ics_opal_unmangle_server(be16_to_cpu(server));
> diff --git a/arch/powerpc/sysdev/xive/native.c
> b/arch/powerpc/sysdev/xive/native.c
> index 3925825954bc..a2082ee866ca 100644
> --- a/arch/powerpc/sysdev/xive/native.c
> +++ b/arch/powerpc/sysdev/xive/native.c
> @@ -52,8 +52,11 @@ int xive_native_populate_irq_data(u32 hw_irq,
> struct xive_irq_data *data)
>
> memset(data, 0, sizeof(*data));
>
> - rc = opal_xive_get_irq_info(hw_irq, &flags, &eoi_page,
> &trig_page,
> - &esb_shift, &src_chip);
> + rc = opal_xive_get_irq_info(hw_irq, stack_pa(&flags),
> + stack_pa(&eoi_page),
> + stack_pa(&trig_page),
> + stack_pa(&esb_shift),
> + stack_pa(&src_chip));
> if (rc) {
> pr_err("opal_xive_get_irq_info(0x%x) returned
> %lld\n",
> hw_irq, rc);
> @@ -117,7 +120,8 @@ static int xive_native_get_irq_config(u32 hw_irq,
> u32 *target, u8 *prio,
> __be64 vp;
> __be32 lirq;
>
> - rc = opal_xive_get_irq_config(hw_irq, &vp, prio, &lirq);
> + rc = opal_xive_get_irq_config(hw_irq, stack_pa(&vp),
> stack_pa(prio),
> + stack_pa(&lirq));
>
> *target = be64_to_cpu(vp);
> *sw_irq = be32_to_cpu(lirq);
> @@ -150,8 +154,8 @@ int xive_native_configure_queue(u32 vp_id, struct
> xive_q *q, u8 prio,
> q->toggle = 0;
>
> rc = opal_xive_get_queue_info(vp_id, prio, NULL, NULL,
> - &qeoi_page_be,
> - &esc_irq_be,
> + stack_pa(&qeoi_page_be),
> + stack_pa(&esc_irq_be),
> NULL);
> if (rc) {
> vp_err(vp_id, "Failed to get queue %d info : %lld\n",
> prio, rc);
> @@ -416,7 +420,8 @@ static void xive_native_setup_cpu(unsigned int
> cpu, struct xive_cpu *xc)
> }
>
> /* Grab it's CAM value */
> - rc = opal_xive_get_vp_info(vp, NULL, &vp_cam_be, NULL, NULL);
> + rc = opal_xive_get_vp_info(vp, NULL, stack_pa(&vp_cam_be),
> NULL,
> + NULL);
> if (rc) {
> pr_err("Failed to get pool VP info CPU %d\n", cpu);
> return;
> @@ -756,7 +761,8 @@ int xive_native_get_vp_info(u32 vp_id, u32
> *out_cam_id, u32 *out_chip_id)
> __be32 vp_chip_id_be;
> s64 rc;
>
> - rc = opal_xive_get_vp_info(vp_id, NULL, &vp_cam_be, NULL,
> &vp_chip_id_be);
> + rc = opal_xive_get_vp_info(vp_id, NULL, stack_pa(&vp_cam_be),
> NULL,
> + stack_pa(&vp_chip_id_be));
> if (rc) {
> vp_err(vp_id, "Failed to get VP info : %lld\n", rc);
> return -EIO;
> @@ -794,8 +800,11 @@ int xive_native_get_queue_info(u32 vp_id, u32
> prio,
> __be64 qflags;
> s64 rc;
>
> - rc = opal_xive_get_queue_info(vp_id, prio, &qpage, &qsize,
> - &qeoi_page, &escalate_irq,
> &qflags);
> + rc = opal_xive_get_queue_info(vp_id, prio, stack_pa(&qpage),
> + stack_pa(&qsize),
> + stack_pa(&qeoi_page),
> + stack_pa(&escalate_irq),
> + stack_pa(&qflags));
> if (rc) {
> vp_err(vp_id, "failed to get queue %d info : %lld\n",
> prio, rc);
> return -EIO;
> @@ -822,8 +831,8 @@ int xive_native_get_queue_state(u32 vp_id, u32
> prio, u32 *qtoggle, u32 *qindex)
> __be32 opal_qindex;
> s64 rc;
>
> - rc = opal_xive_get_queue_state(vp_id, prio, &opal_qtoggle,
> - &opal_qindex);
> + rc = opal_xive_get_queue_state(vp_id, prio,
> stack_pa(&opal_qtoggle),
> + stack_pa(&opal_qindex));
> if (rc) {
> vp_err(vp_id, "failed to get queue %d state :
> %lld\n", prio, rc);
> return -EIO;
> @@ -864,7 +873,7 @@ int xive_native_get_vp_state(u32 vp_id, u64
> *out_state)
> __be64 state;
> s64 rc;
>
> - rc = opal_xive_get_vp_state(vp_id, &state);
> + rc = opal_xive_get_vp_state(vp_id, stack_pa(&state));
> if (rc) {
> vp_err(vp_id, "failed to get vp state : %lld\n", rc);
> return -EIO;
> diff --git a/drivers/char/ipmi/ipmi_powernv.c
> b/drivers/char/ipmi/ipmi_powernv.c
> index da22a8cbe68e..55032e205e8e 100644
> --- a/drivers/char/ipmi/ipmi_powernv.c
> +++ b/drivers/char/ipmi/ipmi_powernv.c
> @@ -91,7 +91,7 @@ static void ipmi_powernv_send(void *send_info,
> struct ipmi_smi_msg *msg)
>
> pr_devel("%s: opal_ipmi_send(0x%llx, %p, %ld)\n", __func__,
> smi->interface_id, opal_msg, size);
> - rc = opal_ipmi_send(smi->interface_id, opal_msg, size);
> + rc = opal_ipmi_send(smi->interface_id, stack_pa(opal_msg),
> size);
> pr_devel("%s: -> %d\n", __func__, rc);
>
> if (!rc) {
> @@ -132,8 +132,8 @@ static int ipmi_powernv_recv(struct
> ipmi_smi_powernv *smi)
> size = cpu_to_be64(sizeof(*opal_msg) + IPMI_MAX_MSG_LENGTH);
>
> rc = opal_ipmi_recv(smi->interface_id,
> - opal_msg,
> - &size);
> + stack_pa(opal_msg),
> + stack_pa(&size));
> size = be64_to_cpu(size);
> pr_devel("%s: -> %d (size %lld)\n", __func__,
> rc, rc == 0 ? size : 0);
> diff --git a/drivers/char/powernv-op-panel.c b/drivers/char/powernv-
> op-panel.c
> index 3c99696b145e..10588093e2e2 100644
> --- a/drivers/char/powernv-op-panel.c
> +++ b/drivers/char/powernv-op-panel.c
> @@ -60,7 +60,7 @@ static int __op_panel_update_display(void)
> return token;
> }
>
> - rc = opal_write_oppanel_async(token, oppanel_lines,
> num_lines);
> + rc = opal_write_oppanel_async(token, stack_pa(oppanel_lines),
> num_lines);
> switch (rc) {
> case OPAL_ASYNC_COMPLETION:
> rc = opal_async_wait_response(token, &msg);
> diff --git a/drivers/i2c/busses/i2c-opal.c b/drivers/i2c/busses/i2c-
> opal.c
> index 9f773b4f5ed8..d1d1fb3a55ba 100644
> --- a/drivers/i2c/busses/i2c-opal.c
> +++ b/drivers/i2c/busses/i2c-opal.c
> @@ -49,7 +49,7 @@ static int i2c_opal_send_request(u32 bus_id, struct
> opal_i2c_request *req)
> return token;
> }
>
> - rc = opal_i2c_request(token, bus_id, req);
> + rc = opal_i2c_request(token, bus_id, stack_pa(req));
> if (rc != OPAL_ASYNC_COMPLETION) {
> rc = i2c_opal_translate_error(rc);
> goto exit;
> diff --git a/drivers/leds/leds-powernv.c b/drivers/leds/leds-
> powernv.c
> index 743e2cdd0891..b65bfdf6fa18 100644
> --- a/drivers/leds/leds-powernv.c
> +++ b/drivers/leds/leds-powernv.c
> @@ -99,7 +99,7 @@ static int powernv_led_set(struct powernv_led_data
> *powernv_led,
> }
>
> rc = opal_leds_set_ind(token, powernv_led->loc_code,
> - led_mask, led_value, &max_type);
> + led_mask, led_value,
> stack_pa(&max_type));
> if (rc != OPAL_ASYNC_COMPLETION) {
> dev_err(dev, "%s: OPAL set LED call failed for %s
> [rc=%d]\n",
> __func__, powernv_led->loc_code, rc);
> @@ -142,7 +142,9 @@ static enum led_brightness powernv_led_get(struct
> powernv_led_data *powernv_led)
> max_type = powernv_led_common->max_led_type;
>
> rc = opal_leds_get_ind(powernv_led->loc_code,
> - &mask, &value, &max_type);
> + stack_pa(&mask),
> + stack_pa(&value),
> + stack_pa(&max_type));
> if (rc != OPAL_SUCCESS && rc != OPAL_PARTIAL) {
> dev_err(dev, "%s: OPAL get led call failed
> [rc=%d]\n",
> __func__, rc);
> diff --git a/drivers/mtd/devices/powernv_flash.c
> b/drivers/mtd/devices/powernv_flash.c
> index 36e060386e59..a2d0e61d0afe 100644
> --- a/drivers/mtd/devices/powernv_flash.c
> +++ b/drivers/mtd/devices/powernv_flash.c
> @@ -66,10 +66,10 @@ static int powernv_flash_async_op(struct mtd_info
> *mtd, enum flash_op op,
>
> switch (op) {
> case FLASH_OP_READ:
> - rc = opal_flash_read(info->id, offset, __pa(buf),
> len, token);
> + rc = opal_flash_read(info->id, offset,
> (uint64_t)stack_pa(buf), len, token);
> break;
> case FLASH_OP_WRITE:
> - rc = opal_flash_write(info->id, offset, __pa(buf),
> len, token);
> + rc = opal_flash_write(info->id, offset,
> (uint64_t)stack_pa(buf), len, token);
> break;
> case FLASH_OP_ERASE:
> rc = opal_flash_erase(info->id, offset, len, token);
> diff --git a/drivers/rtc/rtc-opal.c b/drivers/rtc/rtc-opal.c
> index ad41aaf8a17f..9e627fb7115a 100644
> --- a/drivers/rtc/rtc-opal.c
> +++ b/drivers/rtc/rtc-opal.c
> @@ -53,7 +53,7 @@ static int opal_get_rtc_time(struct device *dev,
> struct rtc_time *tm)
> __be64 __h_m_s_ms;
>
> while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
> - rc = opal_rtc_read(&__y_m_d, &__h_m_s_ms);
> + rc = opal_rtc_read(stack_pa(&__y_m_d),
> stack_pa(&__h_m_s_ms));
> if (rc == OPAL_BUSY_EVENT) {
> msleep(OPAL_BUSY_DELAY_MS);
> opal_poll_events(NULL);
> @@ -127,7 +127,7 @@ static int opal_get_tpo_time(struct device *dev,
> struct rtc_wkalrm *alarm)
> return token;
> }
>
> - rc = opal_tpo_read(token, &__y_m_d, &__h_m);
> + rc = opal_tpo_read(token, stack_pa(&__y_m_d),
> stack_pa(&__h_m));
> if (rc != OPAL_ASYNC_COMPLETION) {
> rc = -EIO;
> goto exit;
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