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KVM: x86 emulator: fix LIDT/LGDT in long mode
The operand size for these instructions is 8 bytes in long mode, even without a REX prefix. Set it explicitly. Triggered while booting Linux with emulate_invalid_guest_state=1. Signed-off-by: Avi Kivity <avi@redhat.com>
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1 changed files with 4 additions and 0 deletions
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@ -2997,6 +2997,8 @@ static int em_lgdt(struct x86_emulate_ctxt *ctxt)
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struct desc_ptr desc_ptr;
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int rc;
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if (ctxt->mode == X86EMUL_MODE_PROT64)
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ctxt->op_bytes = 8;
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rc = read_descriptor(ctxt, ctxt->src.addr.mem,
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&desc_ptr.size, &desc_ptr.address,
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ctxt->op_bytes);
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@ -3024,6 +3026,8 @@ static int em_lidt(struct x86_emulate_ctxt *ctxt)
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struct desc_ptr desc_ptr;
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int rc;
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if (ctxt->mode == X86EMUL_MODE_PROT64)
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ctxt->op_bytes = 8;
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rc = read_descriptor(ctxt, ctxt->src.addr.mem,
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&desc_ptr.size, &desc_ptr.address,
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ctxt->op_bytes);
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