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KVM: x86/emulator: emulate movbe with operand-size prefix

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The MOVBE instruction can come with an operand-size prefix (66h). In
this, case the x86 emulation code returns EMULATION_FAILED.

It turns out that em_movbe can already handle this case and all that
is missing is an entry in respective opcode tables to populate
gprefix->pfx_66.

Signed-off-by: Thomas Prescher <thomas.prescher@cyberus-technology.de>
Signed-off-by: Julian Stecklina <julian.stecklina@cyberus-technology.de>
Acked-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20231212095938.26731-1-julian.stecklina@cyberus-technology.de
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Thomas Prescher 2023-12-12 10:59:37 +01:00 committed by Sean Christopherson
parent e1dda3afe2
commit 03f6298c7c
1 changed files with 2 additions and 2 deletions
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4
arch/x86/kvm/emulate.c
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@ -4505,11 +4505,11 @@ static const struct instr_dual instr_dual_0f_38_f1 = {
};
static const struct gprefix three_byte_0f_38_f0 = {
ID(0, &instr_dual_0f_38_f0), N, N, N
ID(0, &instr_dual_0f_38_f0), ID(0, &instr_dual_0f_38_f0), N, N
};
static const struct gprefix three_byte_0f_38_f1 = {
ID(0, &instr_dual_0f_38_f1), N, N, N
ID(0, &instr_dual_0f_38_f1), ID(0, &instr_dual_0f_38_f1), N, N
};
/*