diff options
| author | Ard Biesheuvel <ardb@kernel.org> | 2020-01-21 09:44:43 +0100 |
|---|---|---|
| committer | Ard Biesheuvel <ardb@kernel.org> | 2020-02-23 21:59:42 +0100 |
| commit | 59f2a619a2db86111e8bb30f349aebff6eb75baa (patch) | |
| tree | dc1aeac5b0479e863dd6feb11960d6680b8d4955 /arch/x86/kernel/asm-offsets_32.c | |
| parent | 09308012d8546dda75e96c02bed19e2ba1e875fd (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/kernel/asm-offsets_32.c')
| -rw-r--r-- | arch/x86/kernel/asm-offsets_32.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kernel/asm-offsets_32.c b/arch/x86/kernel/asm-offsets_32.c index 82826f2275cc..2b4256ebe86e 100644 --- a/arch/x86/kernel/asm-offsets_32.c +++ b/arch/x86/kernel/asm-offsets_32.c @@ -3,6 +3,8 @@ # error "Please do not build this file directly, build asm-offsets.c instead" #endif +#include <linux/efi.h> + #include <asm/ucontext.h> #define __SYSCALL_I386(nr, sym, qual) [nr] = 1, @@ -64,4 +66,7 @@ void foo(void) BLANK(); DEFINE(__NR_syscall_max, sizeof(syscalls) - 1); DEFINE(NR_syscalls, sizeof(syscalls)); + + BLANK(); + DEFINE(EFI_svam, offsetof(efi_runtime_services_t, set_virtual_address_map)); } |