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KVM: x86: clflushopt should be treated as a no-op by emulation
The instruction emulator ignores clflush instructions, yet fails to
support clflushopt. Treat both similarly.
Fixes: 13e457e0ee
("KVM: x86: Emulator does not decode clflush well")
Signed-off-by: David Edmondson <david.edmondson@oracle.com>
Message-Id: <20201103120400.240882-1-david.edmondson@oracle.com>
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
parent
2c38234c42
commit
51b958e5ae
1 changed files with 7 additions and 1 deletions
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@ -4046,6 +4046,12 @@ static int em_clflush(struct x86_emulate_ctxt *ctxt)
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return X86EMUL_CONTINUE;
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return X86EMUL_CONTINUE;
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}
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}
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static int em_clflushopt(struct x86_emulate_ctxt *ctxt)
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{
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/* emulating clflushopt regardless of cpuid */
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return X86EMUL_CONTINUE;
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}
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static int em_movsxd(struct x86_emulate_ctxt *ctxt)
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static int em_movsxd(struct x86_emulate_ctxt *ctxt)
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{
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{
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ctxt->dst.val = (s32) ctxt->src.val;
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ctxt->dst.val = (s32) ctxt->src.val;
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@ -4585,7 +4591,7 @@ static const struct opcode group11[] = {
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};
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};
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static const struct gprefix pfx_0f_ae_7 = {
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static const struct gprefix pfx_0f_ae_7 = {
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I(SrcMem | ByteOp, em_clflush), N, N, N,
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I(SrcMem | ByteOp, em_clflush), I(SrcMem | ByteOp, em_clflushopt), N, N,
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};
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};
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static const struct group_dual group15 = { {
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static const struct group_dual group15 = { {
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