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ACPI fix for 5.15-rc3

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Revert a recent commit related to memory management that turned out
 to be problematic (Jia He).
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Merge tag 'acpi-5.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI fix from Rafael Wysocki:
 "Revert a recent commit related to memory management that turned out to
  be problematic (Jia He)"

* tag 'acpi-5.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  Revert "ACPI: Add memory semantics to acpi_os_map_memory()"
This commit is contained in:
Linus Torvalds 2021-09-24 11:17:32 -07:00
commit ea1f9163ac
4 changed files with 10 additions and 43 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/arm64/include/asm/acpi.h
View File

@ -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

19
arch/arm64/kernel/acpi.c
View File

@ -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.
*

23
drivers/acpi/osl.c
View File

@ -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 @@ out:
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);

8
include/acpi/acpi_io.h
View File

@ -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