[PATCH 1/3] UefiCpuPkg/PiSmmCpuDxeSmm: update comments in IA32 SmmStartup()

[Laszlo Ersek <lersek@redhat.com>]

The gSmmCr3, gSmmCr4, gSmmCr0 and gSmmJmpAddr global variables  are used
for patching assembly instructions, thus we can never remove the DB
encodings for those instructions. At least we should add the intended
meanings in comments.

This patch only changes comments.

Cc: Eric Dong <eric.dong@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
---
 UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/SmmInit.nasm | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/SmmInit.nasm b/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/SmmInit.nasm
index e96dd8d2392a..08534dba64b7 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/SmmInit.nasm
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/SmmInit.nasm
@@ -44,34 +44,34 @@ global ASM_PFX(SmmStartup)
 ASM_PFX(SmmStartup):
     DB      0x66
     mov     eax, 0x80000001             ; read capability
     cpuid
     DB      0x66
     mov     ebx, edx                    ; rdmsr will change edx. keep it in ebx.
-    DB      0x66, 0xb8
+    DB      0x66, 0xb8                  ; mov eax, imm32
 ASM_PFX(gSmmCr3): DD 0
     mov     cr3, eax
     DB      0x67, 0x66
     lgdt    [cs:ebp + (ASM_PFX(gcSmiInitGdtr) - ASM_PFX(SmmStartup))]
-    DB      0x66, 0xb8
+    DB      0x66, 0xb8                  ; mov eax, imm32
 ASM_PFX(gSmmCr4): DD 0
     mov     cr4, eax
     DB      0x66
     mov     ecx, 0xc0000080             ; IA32_EFER MSR
     rdmsr
     DB      0x66
     test    ebx, BIT20                  ; check NXE capability
     jz      .1
     or      ah, BIT3                    ; set NXE bit
     wrmsr
 .1:
-    DB      0x66, 0xb8
+    DB      0x66, 0xb8                  ; mov eax, imm32
 ASM_PFX(gSmmCr0): DD 0
     DB      0xbf, PROTECT_MODE_DS, 0    ; mov di, PROTECT_MODE_DS
     mov     cr0, eax
-    DB      0x66, 0xea                   ; jmp far [ptr48]
+    DB      0x66, 0xea                  ; jmp far [ptr48]
 ASM_PFX(gSmmJmpAddr):
     DD      @32bit
     DW      PROTECT_MODE_CS
 @32bit:
     mov     ds, edi
     mov     es, edi
-- 
2.14.1.3.gb7cf6e02401b