[RFC PATCH v6 83/92] kvm: x86: emulate movd xmm, m32
From: Adalbert Lazăr <hidden>
Date: 2019-08-09 16:05:21
Also in:
kvm, linux-mm
Subsystem:
kernel virtual machine for x86 (kvm/x86), the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Sean Christopherson, Paolo Bonzini, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
From: Mihai Donțu <redacted> This is needed in order to be able to support guest code that uses movd to write into pages that are marked for write tracking. Signed-off-by: Mihai Donțu <redacted> Signed-off-by: Adalbert Lazăr <redacted> --- arch/x86/kvm/emulate.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 7c79504e58cd..b42a71653622 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c@@ -1203,6 +1203,11 @@ static u8 simd_prefix_to_bytes(const struct x86_emulate_ctxt *ctxt, if (simd_prefix == 0x66) bytes = 8; break; + case 0x7e: + /* movd xmm, m32 */ + if (simd_prefix == 0x66) + bytes = 4; + break; default: break; }
@@ -4564,6 +4569,10 @@ static const struct gprefix pfx_0f_d6 = { N, I(0, em_mov), N, N, }; +static const struct gprefix pfx_0f_7e = { + N, I(0, em_mov), N, N, +}; + static const struct gprefix pfx_0f_2b = { ID(0, &instr_dual_0f_2b), ID(0, &instr_dual_0f_2b), N, N, };
@@ -4823,7 +4832,8 @@ static const struct opcode twobyte_table[256] = { N, N, N, N, N, N, N, N, N, N, N, N, - N, N, N, GP(SrcReg | DstMem | ModRM | Mov, &pfx_0f_6f_0f_7f), + N, N, GP(ModRM | SrcReg | DstMem | GPRModRM | Mov | Sse, &pfx_0f_7e), + GP(SrcReg | DstMem | ModRM | Mov, &pfx_0f_6f_0f_7f), /* 0x80 - 0x8F */ X16(D(SrcImm | NearBranch)), /* 0x90 - 0x9F */
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