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| author |  Brijesh Singh <brijesh.singh@amd.com>
| 2022-03-07 15:33:51 -0600 |
|---|---|---|
| committer |  Borislav Petkov <bp@suse.de>
| 2022-04-07 16:47:12 +0200 |
| commit | d5af44dde5461d125d1602ac913ab5c6bdf09b8b (patch) | |
| tree | 37b7a764183747cb3a64700efe4b9ea5eac913e6 /arch/x86/include/asm/sev-common.h | |
| parent | x86/sev: Add a sev= cmdline option (diff) | |
| download | linux-d5af44dde5461d125d1602ac913ab5c6bdf09b8b.tar.gz linux-d5af44dde5461d125d1602ac913ab5c6bdf09b8b.tar.bz2 linux-d5af44dde5461d125d1602ac913ab5c6bdf09b8b.zip | |
x86/sev: Provide support for SNP guest request NAEs
Version 2 of GHCB specification provides SNP_GUEST_REQUEST and
SNP_EXT_GUEST_REQUEST NAE that can be used by the SNP guest to
communicate with the PSP.
While at it, add a snp_issue_guest_request() helper that will be used by
driver or other subsystem to issue the request to PSP.
See SEV-SNP firmware and GHCB spec for more details.
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220307213356.2797205-42-brijesh.singh@amd.com
Diffstat (limited to 'arch/x86/include/asm/sev-common.h')
| -rw-r--r-- | arch/x86/include/asm/sev-common.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/sev-common.h b/arch/x86/include/asm/sev-common.h index 0759af9b1acf..b8357d6ecd47 100644 --- a/arch/x86/include/asm/sev-common.h +++ b/arch/x86/include/asm/sev-common.h @@ -128,6 +128,9 @@ struct snp_psc_desc { struct psc_entry entries[VMGEXIT_PSC_MAX_ENTRY]; } __packed; +/* Guest message request error code */ +#define SNP_GUEST_REQ_INVALID_LEN BIT_ULL(32) + #define GHCB_MSR_TERM_REQ 0x100 #define GHCB_MSR_TERM_REASON_SET_POS 12 #define GHCB_MSR_TERM_REASON_SET_MASK 0xf |