path: root/arch/x86/platform/efi/efi_32.c
diff options
authorArd Biesheuvel <ardb@kernel.org>2020-01-21 09:44:43 +0100
committerArd Biesheuvel <ardb@kernel.org>2020-02-23 21:59:42 +0100
commit59f2a619a2db86111e8bb30f349aebff6eb75baa (patch)
treedc1aeac5b0479e863dd6feb11960d6680b8d4955 /arch/x86/platform/efi/efi_32.c
parent09308012d8546dda75e96c02bed19e2ba1e875fd (diff)
efi: Add 'runtime' pointer to struct efi
Instead of going through the EFI system table each time, just copy the runtime services table pointer into struct efi directly. This is the last use of the system table pointer in struct efi, allowing us to drop it in a future patch, along with a fair amount of quirky handling of the translated address. Note that usually, the runtime services pointer changes value during the call to SetVirtualAddressMap(), so grab the updated value as soon as that call returns. (Mixed mode uses a 1:1 mapping, and kexec boot enters with the updated address in the system table, so in those cases, we don't need to do anything here) Tested-by: Tony Luck <tony.luck@intel.com> # arch/ia64 Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Diffstat (limited to 'arch/x86/platform/efi/efi_32.c')
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/x86/platform/efi/efi_32.c b/arch/x86/platform/efi/efi_32.c
index 081d466002c9..c049c432745d 100644
--- a/arch/x86/platform/efi/efi_32.c
+++ b/arch/x86/platform/efi/efi_32.c
@@ -66,14 +66,16 @@ void __init efi_map_region(efi_memory_desc_t *md)
void __init efi_map_region_fixed(efi_memory_desc_t *md) {}
void __init parse_efi_setup(u64 phys_addr, u32 data_len) {}
-efi_status_t efi_call_svam(efi_set_virtual_address_map_t *__efiapi *,
- u32, u32, u32, void *);
+efi_status_t efi_call_svam(efi_runtime_services_t * const *,
+ u32, u32, u32, void *, u32);
efi_status_t __init efi_set_virtual_address_map(unsigned long memory_map_size,
unsigned long descriptor_size,
u32 descriptor_version,
- efi_memory_desc_t *virtual_map)
+ efi_memory_desc_t *virtual_map,
+ unsigned long systab_phys)
+ const efi_system_table_t *systab = (efi_system_table_t *)systab_phys;
struct desc_ptr gdt_descr;
efi_status_t status;
unsigned long flags;
@@ -90,9 +92,10 @@ efi_status_t __init efi_set_virtual_address_map(unsigned long memory_map_size,
/* Disable interrupts around EFI calls: */
- status = efi_call_svam(&efi.systab->runtime->set_virtual_address_map,
+ status = efi_call_svam(&systab->runtime,
memory_map_size, descriptor_size,
- descriptor_version, virtual_map);
+ descriptor_version, virtual_map,
+ __pa(&efi.runtime));

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