From 103f98ea64a1b0a67d8a1b23070b4db3533db2b8 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Thu, 30 May 2013 13:22:39 +0200 Subject: [PATCH] KVM: Emulate multibyte NOP This is encountered when booting RHEL5.9 64-bit. There is another bug after this one that is not a simple emulation failure, but this one lets the boot proceed a bit. Cc: # 3.9 Signed-off-by: Paolo Bonzini Signed-off-by: Gleb Natapov --- arch/x86/kvm/emulate.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 8db0010ed150..0f42c2a48166 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -3997,7 +3997,8 @@ static const struct opcode twobyte_table[256] = { DI(ImplicitOps | Priv, invd), DI(ImplicitOps | Priv, wbinvd), N, N, N, D(ImplicitOps | ModRM), N, N, /* 0x10 - 0x1F */ - N, N, N, N, N, N, N, N, D(ImplicitOps | ModRM), N, N, N, N, N, N, N, + N, N, N, N, N, N, N, N, + D(ImplicitOps | ModRM), N, N, N, N, N, N, D(ImplicitOps | ModRM), /* 0x20 - 0x2F */ DIP(ModRM | DstMem | Priv | Op3264, cr_read, check_cr_read), DIP(ModRM | DstMem | Priv | Op3264, dr_read, check_dr_read), @@ -4836,6 +4837,7 @@ twobyte_insn: case 0x08: /* invd */ case 0x0d: /* GrpP (prefetch) */ case 0x18: /* Grp16 (prefetch/nop) */ + case 0x1f: /* nop */ break; case 0x20: /* mov cr, reg */ ctxt->dst.val = ops->get_cr(ctxt, ctxt->modrm_reg); -- 2.39.5