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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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7
arch/x86/boot/compressed/misc.h
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@@ -115,6 +115,12 @@ static inline void console_init(void)
void set_sev_encryption_mask(void);
#ifdef CONFIG_AMD_MEM_ENCRYPT
void sev_es_shutdown_ghcb(void);
#else
static inline void sev_es_shutdown_ghcb(void) { }
#endif
/* acpi.c */
#ifdef CONFIG_ACPI
acpi_physical_address get_rsdp_addr(void);
@@ -144,5 +150,6 @@ extern struct desc_ptr boot_idt_desc;
/* IDT Entry Points */
void boot_page_fault(void);
void boot_stage1_vc(void);
void boot_stage2_vc(void);
#endif /* BOOT_COMPRESSED_MISC_H */