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x86/boot/compressed/64: Setup a GHCB-based VC Exception handler

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Install an exception handler for #VC exception that uses a GHCB. Also
add the infrastructure for handling different exit-codes by decoding
the instruction that caused the exception and error handling.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200907131613.12703-24-joro@8bytes.org
This commit is contained in:
Joerg Roedel
2020-09-07 15:15:24 +02:00
committed by Borislav Petkov
parent c81d60029a
commit 597cfe4821
10 changed files with 331 additions and 1 deletions
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arch/x86/include/uapi/asm/svm.h
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@@ -29,6 +29,7 @@
#define SVM_EXIT_WRITE_DR6 0x036
#define SVM_EXIT_WRITE_DR7 0x037
#define SVM_EXIT_EXCP_BASE 0x040
#define SVM_EXIT_LAST_EXCP 0x05f
#define SVM_EXIT_INTR 0x060
#define SVM_EXIT_NMI 0x061
#define SVM_EXIT_SMI 0x062