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[59/70] x86/sev-es: Handle #AC Events

Message ID 20200319091407.1481-60-joro@8bytes.org (mailing list archive)
State New, archived
Headers show
Series x86: SEV-ES Guest Support | expand

Commit Message

Joerg Roedel March 19, 2020, 9:13 a.m. UTC 
From: Joerg Roedel <jroedel@suse.de>

Implement a handler for #VC exceptions caused by #AC exceptions. The #AC
exception is just forwarded to do_alignment_check() and not pushed down
to the hypervisor, as requested by the SEV-ES GHCB Standardization
Specification.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 arch/x86/kernel/sev-es.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index efb392e6f483..f22b361f6b60 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -766,6 +766,10 @@  static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt,
 	case SVM_EXIT_WRITE_DR7:
 		result = vc_handle_dr7_write(ghcb, ctxt, early);
 		break;
+	case SVM_EXIT_EXCP_BASE + X86_TRAP_AC:
+		do_alignment_check(ctxt->regs, 0);
+		result = ES_RETRY;
+		break;
 	case SVM_EXIT_RDTSC:
 	case SVM_EXIT_RDTSCP:
 		result = vc_handle_rdtsc(ghcb, ctxt, exit_code);