This reverts commit 437b38c51162f8b87beb28a833c4d5dc85fa864e.
After this commit, a boot panic is alway hit on an Ampere EMAG server with call trace as follows: Internal error: synchronous external abort: 96000410 [#1] SMP Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.14.0+ #462 Hardware name: MiTAC RAPTOR EV-883832-X3-0001/RAPTOR, BIOS 0.14 02/22/2019 pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [...snip...] Call trace: acpi_ex_system_memory_space_handler+0x26c/0x2c8 acpi_ev_address_space_dispatch+0x228/0x2c4 acpi_ex_access_region+0x114/0x268 acpi_ex_field_datum_io+0x128/0x1b8 acpi_ex_extract_from_field+0x14c/0x2ac acpi_ex_read_data_from_field+0x190/0x1b8 acpi_ex_resolve_node_to_value+0x1ec/0x288 acpi_ex_resolve_to_value+0x250/0x274 acpi_ds_evaluate_name_path+0xac/0x124 acpi_ds_exec_end_op+0x90/0x410 acpi_ps_parse_loop+0x4ac/0x5d8 acpi_ps_parse_aml+0xe0/0x2c8 acpi_ps_execute_method+0x19c/0x1ac acpi_ns_evaluate+0x1f8/0x26c acpi_ns_init_one_device+0x104/0x140 acpi_ns_walk_namespace+0x158/0x1d0 acpi_ns_initialize_devices+0x194/0x218 acpi_initialize_objects+0x48/0x50 acpi_init+0xe0/0x498
From the debugging, we're mapping something which is *not* described by
the EFI memory map, but *does* want PROT_NORMAL_NC.
Hence just revert it before everything is clear.
Fixes: 437b38c51162 ("ACPI: Add memory semantics to acpi_os_map_memory()") Cc: stable@vger.kernel.org Cc: Lorenzo Pieralisi lorenzo.pieralisi@arm.com Cc: Ard Biesheuvel ardb@kernel.org Cc: Hanjun Guo guohanjun@huawei.com Cc: Catalin Marinas catalin.marinas@arm.com Cc: Rafael J. Wysocki rafael.j.wysocki@intel.com
Signed-off-by: Jia He justin.he@arm.com --- arch/arm64/include/asm/acpi.h | 3 --- arch/arm64/kernel/acpi.c | 19 +++---------------- drivers/acpi/osl.c | 23 +++++++---------------- include/acpi/acpi_io.h | 8 -------- 4 files changed, 10 insertions(+), 43 deletions(-)
diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h index 7535dc7cc5aa..bd68e1b7f29f 100644 --- a/arch/arm64/include/asm/acpi.h +++ b/arch/arm64/include/asm/acpi.h @@ -50,9 +50,6 @@ pgprot_t __acpi_get_mem_attribute(phys_addr_t addr); void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size); #define acpi_os_ioremap acpi_os_ioremap
-void __iomem *acpi_os_memmap(acpi_physical_address phys, acpi_size size); -#define acpi_os_memmap acpi_os_memmap - typedef u64 phys_cpuid_t; #define PHYS_CPUID_INVALID INVALID_HWID
diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c index 1c9c2f7a1c04..f3851724fe35 100644 --- a/arch/arm64/kernel/acpi.c +++ b/arch/arm64/kernel/acpi.c @@ -273,8 +273,7 @@ pgprot_t __acpi_get_mem_attribute(phys_addr_t addr) return __pgprot(PROT_DEVICE_nGnRnE); }
-static void __iomem *__acpi_os_ioremap(acpi_physical_address phys, - acpi_size size, bool memory) +void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size) { efi_memory_desc_t *md, *region = NULL; pgprot_t prot; @@ -300,11 +299,9 @@ static void __iomem *__acpi_os_ioremap(acpi_physical_address phys, * It is fine for AML to remap regions that are not represented in the * EFI memory map at all, as it only describes normal memory, and MMIO * regions that require a virtual mapping to make them accessible to - * the EFI runtime services. Determine the region default - * attributes by checking the requested memory semantics. + * the EFI runtime services. */ - prot = memory ? __pgprot(PROT_NORMAL_NC) : - __pgprot(PROT_DEVICE_nGnRnE); + prot = __pgprot(PROT_DEVICE_nGnRnE); if (region) { switch (region->type) { case EFI_LOADER_CODE: @@ -364,16 +361,6 @@ static void __iomem *__acpi_os_ioremap(acpi_physical_address phys, return __ioremap(phys, size, prot); }
-void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size) -{ - return __acpi_os_ioremap(phys, size, false); -} - -void __iomem *acpi_os_memmap(acpi_physical_address phys, acpi_size size) -{ - return __acpi_os_ioremap(phys, size, true); -} - /* * Claim Synchronous External Aborts as a firmware first notification. * diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index a43f1521efe6..45c5c0e45e33 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -284,8 +284,7 @@ acpi_map_lookup_virt(void __iomem *virt, acpi_size size) #define should_use_kmap(pfn) page_is_ram(pfn) #endif
-static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz, - bool memory) +static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) { unsigned long pfn;
@@ -295,8 +294,7 @@ static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz, return NULL; return (void __iomem __force *)kmap(pfn_to_page(pfn)); } else - return memory ? acpi_os_memmap(pg_off, pg_sz) : - acpi_os_ioremap(pg_off, pg_sz); + return acpi_os_ioremap(pg_off, pg_sz); }
static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) @@ -311,10 +309,9 @@ static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) }
/** - * __acpi_os_map_iomem - Get a virtual address for a given physical address range. + * acpi_os_map_iomem - Get a virtual address for a given physical address range. * @phys: Start of the physical address range to map. * @size: Size of the physical address range to map. - * @memory: true if remapping memory, false if IO * * Look up the given physical address range in the list of existing ACPI memory * mappings. If found, get a reference to it and return a pointer to it (its @@ -324,8 +321,8 @@ static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) * During early init (when acpi_permanent_mmap has not been set yet) this * routine simply calls __acpi_map_table() to get the job done. */ -static void __iomem __ref -*__acpi_os_map_iomem(acpi_physical_address phys, acpi_size size, bool memory) +void __iomem __ref +*acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) { struct acpi_ioremap *map; void __iomem *virt; @@ -356,7 +353,7 @@ static void __iomem __ref
pg_off = round_down(phys, PAGE_SIZE); pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; - virt = acpi_map(phys, size, memory); + virt = acpi_map(phys, size); if (!virt) { mutex_unlock(&acpi_ioremap_lock); kfree(map); @@ -375,17 +372,11 @@ static void __iomem __ref mutex_unlock(&acpi_ioremap_lock); return map->virt + (phys - map->phys); } - -void __iomem *__ref -acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) -{ - return __acpi_os_map_iomem(phys, size, false); -} EXPORT_SYMBOL_GPL(acpi_os_map_iomem);
void *__ref acpi_os_map_memory(acpi_physical_address phys, acpi_size size) { - return (void *)__acpi_os_map_iomem(phys, size, true); + return (void *)acpi_os_map_iomem(phys, size); } EXPORT_SYMBOL_GPL(acpi_os_map_memory);
diff --git a/include/acpi/acpi_io.h b/include/acpi/acpi_io.h index a0212e67d6f4..027faa8883aa 100644 --- a/include/acpi/acpi_io.h +++ b/include/acpi/acpi_io.h @@ -14,14 +14,6 @@ static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys, } #endif
-#ifndef acpi_os_memmap -static inline void __iomem *acpi_os_memmap(acpi_physical_address phys, - acpi_size size) -{ - return ioremap_cache(phys, size); -} -#endif - extern bool acpi_permanent_mmap;
void __iomem __ref