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author | Tom Lendacky <thomas.lendacky@amd.com> | 2020-08-12 15:21:36 -0500 |
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committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2020-08-17 02:46:39 +0000 |
commit | 5277540e37e88a1a69f9517c4ad895051b4b3ed3 (patch) | |
tree | 2395bf622ff3af9ca7c5fa92c5d570e2c1eda63f /UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf | |
parent | 3a4a6ead323feb6f021c0daf93a974464a9eeeec (diff) | |
download | edk2-5277540e37e88a1a69f9517c4ad895051b4b3ed3.tar.gz edk2-5277540e37e88a1a69f9517c4ad895051b4b3ed3.tar.bz2 edk2-5277540e37e88a1a69f9517c4ad895051b4b3ed3.zip |
UefiCpuPkg/CpuExceptionHandler: Add base support for the #VC exception
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198
Add base support to handle #VC exceptions. Update the common exception
handlers to invoke the VmgExitHandleVc () function of the VmgExitLib
library when a #VC is encountered. A non-zero return code will propagate
to the targeted exception handler.
Under SEV-ES, a DR7 read or write intercept generates a #VC exception.
To avoid exception recursion, a #VC exception will not try to read and
push the actual debug registers into the EFI_SYSTEM_CONTEXT_X64 struct
and instead push zeroes. The #VC exception handler does not make use of
the debug registers from the saved context and the exception processing
exit code does not attempt to restore the debug register values.
Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
Diffstat (limited to 'UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf')
-rw-r--r-- | UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf b/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf index 61e2ec30b0..07b34c92a8 100644 --- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf +++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf @@ -57,3 +57,4 @@ PeCoffGetEntryPointLib
MemoryAllocationLib
DebugLib
+ VmgExitLib
|