diff options
| author | Michael Kinney <michael.d.kinney@intel.com> | 2015-04-27 19:54:52 +0000 |
|---|---|---|
| committer | mdkinney <mdkinney@Edk2> | 2015-04-27 19:54:52 +0000 |
| commit | 087c67d0a0847f61b70fa565361ff88fe80e46e5 (patch) | |
| tree | 5e7b4a2fa22862d31c1b41770c6c7bfdc8b59c4a /UefiCpuPkg | |
| parent | 5f72e68c9067ae5b8cfa7c935db81002cb22e00f (diff) | |
| download | edk2-platforms-087c67d0a0847f61b70fa565361ff88fe80e46e5.tar.xz | |
UefiCpuPkg/CpuExceptionHandlerLib: Support IA32 processors without DE or FXSAVE/FXRESTOR
Use CPUID Leaf 01 to detect support for debug extensions and FXSAVE/FXRESTOR instructions.
Do not enable those features in CR4 if they are not supported.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Michael Kinney <michael.d.kinney@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17221 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'UefiCpuPkg')
5 files changed, 59 insertions, 12 deletions
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf b/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf index 85e01aad1e..316ed55b2a 100644 --- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf +++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf @@ -1,7 +1,7 @@ ## @file
# CPU Exception Handler library instance for DXE modules.
#
-# Copyright (c) 2013 - 2014, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2013 - 2015, Intel Corporation. All rights reserved.<BR>
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
@@ -18,7 +18,7 @@ MODULE_UNI_FILE = DxeCpuExceptionHandlerLib.uni
FILE_GUID = B6E9835A-EDCF-4748-98A8-27D3C722E02D
MODULE_TYPE = DXE_DRIVER
- VERSION_STRING = 1.0
+ VERSION_STRING = 1.1
LIBRARY_CLASS = CpuExceptionHandlerLib|DXE_CORE DXE_DRIVER UEFI_APPLICATION
#
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/ExceptionHandlerAsm.S b/UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/ExceptionHandlerAsm.S index 627f3e513c..3676809b4b 100644 --- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/ExceptionHandlerAsm.S +++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/ExceptionHandlerAsm.S @@ -1,6 +1,6 @@ #------------------------------------------------------------------------------
#*
-#* Copyright (c) 2012 - 2013, Intel Corporation. All rights reserved.<BR>
+#* Copyright (c) 2012 - 2015, Intel Corporation. All rights reserved.<BR>
#* This program and the accompanying materials
#* are licensed and made available under the terms and conditions of the BSD License
#* which accompanies this distribution. The full text of the license may be found at
@@ -447,10 +447,25 @@ ErrorCodeAndVectorOnStack: pushl %eax
#; UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;
+## insure FXSAVE/FXRSTOR is enabled in CR4...
+## ... while we're at it, make sure DE is also enabled...
+ mov $1, %eax
+ pushl %ebx # temporarily save value of ebx on stack
+ cpuid # use CPUID to determine if FXSAVE/FXRESTOR
+ # and DE are supported
+ popl %ebx # retore value of ebx that was overwritten
+ # by CPUID
movl %cr4, %eax
- orl $0x208, %eax
+ pushl %eax # push cr4 firstly
+ testl $BIT24, %edx # Test for FXSAVE/FXRESTOR support
+ jz L1
+ orl $BIT9, %eax # Set CR4.OSFXSR
+L1:
+ testl $BIT2, %edx # Test for Debugging Extensions support
+ jz L2
+ orl $BIT3, %eax # Set CR4.DE
+L2:
movl %eax, %cr4
- pushl %eax
movl %cr3, %eax
pushl %eax
movl %cr2, %eax
@@ -477,7 +492,11 @@ ErrorCodeAndVectorOnStack: #; FX_SAVE_STATE_IA32 FxSaveState;
subl $512, %esp
movl %esp, %edi
+ testl $BIT24, %edx # Test for FXSAVE/FXRESTOR support.
+ # edx still contains result from CPUID above
+ jz L3
.byte 0x0f, 0x0ae, 0x07 #fxsave [edi]
+L3:
#; UEFI calling convention for IA32 requires that Direction flag in EFLAGs is clear
cld
@@ -503,7 +522,13 @@ ErrorCodeAndVectorOnStack: #; FX_SAVE_STATE_IA32 FxSaveState;
movl %esp, %esi
+ movl $1, %eax
+ cpuid # use CPUID to determine if FXSAVE/FXRESTOR
+ # are supported
+ testl $BIT24, %edx # Test for FXSAVE/FXRESTOR support
+ jz L4
.byte 0x0f, 0x0ae, 0x0e # fxrstor [esi]
+L4:
addl $512, %esp
#; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/ExceptionHandlerAsm.asm b/UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/ExceptionHandlerAsm.asm index 3ff01b2a0c..12bbec0690 100644 --- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/ExceptionHandlerAsm.asm +++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/ExceptionHandlerAsm.asm @@ -1,5 +1,5 @@ ;------------------------------------------------------------------------------ ;
-; Copyright (c) 2012 - 2013, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2012 - 2015, Intel Corporation. All rights reserved.<BR>
; This program and the accompanying materials
; are licensed and made available under the terms and conditions of the BSD License
; which accompanies this distribution. The full text of the license may be found at
@@ -250,10 +250,22 @@ ErrorCodeAndVectorOnStack: push eax
;; UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;
+ mov eax, 1
+ push ebx ; temporarily save value of ebx on stack
+ cpuid ; use CPUID to determine if FXSAVE/FXRESTOR and DE
+ ; are supported
+ pop ebx ; retore value of ebx that was overwritten by CPUID
mov eax, cr4
- or eax, 208h
+ push eax ; push cr4 firstly
+ test edx, BIT24 ; Test for FXSAVE/FXRESTOR support
+ jz @F
+ or eax, BIT9 ; Set CR4.OSFXSR
+@@:
+ test edx, BIT2 ; Test for Debugging Extensions support
+ jz @F
+ or eax, BIT3 ; Set CR4.DE
+@@:
mov cr4, eax
- push eax
mov eax, cr3
push eax
mov eax, cr2
@@ -280,7 +292,11 @@ ErrorCodeAndVectorOnStack: ;; FX_SAVE_STATE_IA32 FxSaveState;
sub esp, 512
mov edi, esp
+ test edx, BIT24 ; Test for FXSAVE/FXRESTOR support.
+ ; edx still contains result from CPUID above
+ jz @F
db 0fh, 0aeh, 07h ;fxsave [edi]
+@@:
;; UEFI calling convention for IA32 requires that Direction flag in EFLAGs is clear
cld
@@ -307,7 +323,13 @@ ErrorCodeAndVectorOnStack: ;; FX_SAVE_STATE_IA32 FxSaveState;
mov esi, esp
+ mov eax, 1
+ cpuid ; use CPUID to determine if FXSAVE/FXRESTOR
+ ; are supported
+ test edx, BIT24 ; Test for FXSAVE/FXRESTOR support
+ jz @F
db 0fh, 0aeh, 0eh ; fxrstor [esi]
+@@:
add esp, 512
;; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuExceptionHandlerLib.inf b/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuExceptionHandlerLib.inf index 0530a15024..951a6fe62c 100644 --- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuExceptionHandlerLib.inf +++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuExceptionHandlerLib.inf @@ -1,7 +1,7 @@ ## @file
# CPU Exception Handler library instance for SEC/PEI modules.
#
-# Copyright (c) 2012 - 2014, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2012 - 2015, Intel Corporation. All rights reserved.<BR>
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
@@ -18,7 +18,7 @@ MODULE_UNI_FILE = SecPeiCpuExceptionHandlerLib.uni
FILE_GUID = CA4BBC99-DFC6-4234-B553-8B6586B7B113
MODULE_TYPE = PEIM
- VERSION_STRING = 1.0
+ VERSION_STRING = 1.1
LIBRARY_CLASS = CpuExceptionHandlerLib|SEC PEI_CORE PEIM
#
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/SmmCpuExceptionHandlerLib.inf b/UefiCpuPkg/Library/CpuExceptionHandlerLib/SmmCpuExceptionHandlerLib.inf index 582fc8a9cf..59f2d4d26d 100644 --- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/SmmCpuExceptionHandlerLib.inf +++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/SmmCpuExceptionHandlerLib.inf @@ -1,7 +1,7 @@ ## @file
# CPU Exception Handler library instance for SMM modules.
#
-# Copyright (c) 2013 - 2014, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2013 - 2015, Intel Corporation. All rights reserved.<BR>
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
@@ -18,7 +18,7 @@ MODULE_UNI_FILE = SmmCpuExceptionHandlerLib.uni
FILE_GUID = 8D2C439B-3981-42ff-9CE5-1B50ECA502D6
MODULE_TYPE = DXE_SMM_DRIVER
- VERSION_STRING = 1.0
+ VERSION_STRING = 1.1
LIBRARY_CLASS = CpuExceptionHandlerLib|DXE_SMM_DRIVER
#
|