Commit fa4491a6b667304 moved the permission check for io instructions
to the ->check_perm callback. It failed to copy the port value from RDX
register for string and "in,out ax,dx" instructions. Fix it.
Fixes FC8.32 installation.
Signed-off-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 3bc6b7a..df354a4 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2944,6 +2944,15 @@ static int check_perm_in(struct x86_emulate_ctxt *ctxt)
{
struct decode_cache *c = &ctxt->decode;
+ switch (c->b) {
+ case 0x6c: /* insb */
+ case 0x6d: /* insw/insd */
+ case 0xec: /* in al,dx */
+ case 0xed: /* in (e/r)ax,dx */
+ c->src.val = c->regs[VCPU_REGS_RDX];
+ break;
+ }
+
c->dst.bytes = min(c->dst.bytes, 4u);
if (!emulator_io_permited(ctxt, c->src.val, c->dst.bytes))
return emulate_gp(ctxt, 0);
@@ -2955,6 +2964,15 @@ static int check_perm_out(struct x86_emulate_ctxt *ctxt)
{
struct decode_cache *c = &ctxt->decode;
+ switch (c->b) {
+ case 0x6e: /* outsb */
+ case 0x6f: /* outsw/outsd */
+ case 0xee: /* out dx,al */
+ case 0xef: /* out dx,(e/r)ax */
+ c->dst.val = c->regs[VCPU_REGS_RDX];
+ break;
+ }
+
c->src.bytes = min(c->src.bytes, 4u);
if (!emulator_io_permited(ctxt, c->dst.val, c->src.bytes))
return emulate_gp(ctxt, 0);
--
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