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x86/boot/compressed/sev-es: Convert to insn_decode()

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Other than simplifying the code there should be no functional changes
resulting from this.

Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210304174237.31945-7-bp@alien8.de
This commit is contained in:
Borislav Petkov 2020-11-05 17:53:20 +01:00
parent 6e8c83d2a3
commit 514ef77607
1 changed files with 5 additions and 6 deletions
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11
arch/x86/boot/compressed/sev-es.c
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@ -78,16 +78,15 @@ static inline void sev_es_wr_ghcb_msr(u64 val)
static enum es_result vc_decode_insn(struct es_em_ctxt *ctxt)
{
char buffer[MAX_INSN_SIZE];
enum es_result ret;
int ret;
memcpy(buffer, (unsigned char *)ctxt->regs->ip, MAX_INSN_SIZE);
insn_init(&ctxt->insn, buffer, MAX_INSN_SIZE, 1);
insn_get_length(&ctxt->insn);
ret = insn_decode(&ctxt->insn, buffer, MAX_INSN_SIZE, INSN_MODE_64);
if (ret < 0)
return ES_DECODE_FAILED;
ret = ctxt->insn.immediate.got ? ES_OK : ES_DECODE_FAILED;
return ret;
return ES_OK;
}
static enum es_result vc_write_mem(struct es_em_ctxt *ctxt,