On Tue, Dec 12, 2023 at 10:59:37AM +0100, Julian Stecklina wrote:
> From: Thomas Prescher <thomas.prescher@xxxxxxxxxxxxxxxxxxxxx>
>
> 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@xxxxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Julian Stecklina <julian.stecklina@xxxxxxxxxxxxxxxxxxxxx>
> ---
> arch/x86/kvm/emulate.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
> index 2673cd5c46cb..08013e158b2d 100644
> --- a/arch/x86/kvm/emulate.c
> +++ b/arch/x86/kvm/emulate.c
> @@ -4502,11 +4502,11 @@ 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
> };
>
> /*
> --
Acked-by: Borislav Petkov (AMD) <bp@xxxxxxxxx>
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
