diff options
| author | Ray Ni <ray.ni@intel.com> | 2019-06-12 17:26:45 +0800 |
|---|---|---|
| committer | Ray Ni <ray.ni@intel.com> | 2019-07-10 16:00:15 +0800 |
| commit | 7365eb2c8cf1d7112330d09918c0c67e8d0b827a (patch) | |
| tree | 470ff5cbaf3038ed534f98344c4791564e4ac5a7 /UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.nasm | |
| parent | 7c5010c7f88b790f4524c4a5311819e3af5e2752 (diff) | |
| download | edk2-7365eb2c8cf1d7112330d09918c0c67e8d0b827a.tar.gz edk2-7365eb2c8cf1d7112330d09918c0c67e8d0b827a.tar.bz2 edk2-7365eb2c8cf1d7112330d09918c0c67e8d0b827a.zip | |
UefiCpuPkg/PiSmmCpu: Enable 5 level paging when CPU supports
REF:https://bugzilla.tianocore.org/show_bug.cgi?id=1946
The patch changes SMM environment to use 5 level paging when CPU
supports it.
Signed-off-by: Ray Ni <ray.ni@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
Diffstat (limited to 'UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.nasm')
| -rw-r--r-- | UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.nasm | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.nasm b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.nasm index 741e4b7da2..271492a9d7 100644 --- a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.nasm +++ b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.nasm @@ -69,6 +69,7 @@ extern ASM_PFX(mXdSupported) global ASM_PFX(gPatchXdSupported)
global ASM_PFX(gPatchSmiStack)
global ASM_PFX(gPatchSmiCr3)
+global ASM_PFX(gPatch5LevelPagingSupport)
global ASM_PFX(gcSmiHandlerTemplate)
global ASM_PFX(gcSmiHandlerSize)
@@ -124,6 +125,17 @@ ProtFlatMode: ASM_PFX(gPatchSmiCr3):
mov cr3, rax
mov eax, 0x668 ; as cr4.PGE is not set here, refresh cr3
+
+ mov cl, strict byte 0 ; source operand will be patched
+ASM_PFX(gPatch5LevelPagingSupport):
+ cmp cl, 0
+ je SkipEnable5LevelPaging
+ ;
+ ; Enable 5-Level Paging bit
+ ;
+ bts eax, 12 ; Set LA57 bit (bit #12)
+SkipEnable5LevelPaging:
+
mov cr4, rax ; in PreModifyMtrrs() to flush TLB.
; Load TSS
sub esp, 8 ; reserve room in stack
|