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x86/sev-es: Wire up existing #VC exit-code handlers 

Re-use the handlers for CPUID- and IOIO-caused #VC exceptions in the
early boot handler.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200907131613.12703-48-joro@8bytes.org
This commit is contained in:
Joerg Roedel 2020-09-07 15:15:48 +02:00 committed by Borislav Petkov
parent 0786138c78
commit d3529bb73f
2 changed files with 9 additions and 4 deletions
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7
arch/x86/kernel/sev-es-shared.c
View File

@ -325,8 +325,7 @@ static enum es_result vc_ioio_exitinfo(struct es_em_ctxt *ctxt, u64 *exitinfo)
return ES_OK;
}
static enum es_result __maybe_unused
vc_handle_ioio(struct ghcb *ghcb, struct es_em_ctxt *ctxt)
static enum es_result vc_handle_ioio(struct ghcb *ghcb, struct es_em_ctxt *ctxt)
{
struct pt_regs *regs = ctxt->regs;
u64 exit_info_1, exit_info_2;
@ -434,8 +433,8 @@ vc_handle_ioio(struct ghcb *ghcb, struct es_em_ctxt *ctxt)
return ret;
}
static enum es_result __maybe_unused vc_handle_cpuid(struct ghcb *ghcb,
struct es_em_ctxt *ctxt)
static enum es_result vc_handle_cpuid(struct ghcb *ghcb,
struct es_em_ctxt *ctxt)
{
struct pt_regs *regs = ctxt->regs;
u32 cr4 = native_read_cr4();

6
arch/x86/kernel/sev-es.c
View File

@ -441,6 +441,12 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt,
enum es_result result;
switch (exit_code) {
case SVM_EXIT_CPUID:
result = vc_handle_cpuid(ghcb, ctxt);
break;
case SVM_EXIT_IOIO:
result = vc_handle_ioio(ghcb, ctxt);
break;
default:
/*
* Unexpected #VC exception