x86/emulator: generalize movq emulation (SSE2 and AVX variants)

Extend the existing movq emulation to also support its SSE2 and AVX
variants, the latter implying the addition of VEX decoding. Fold the
read and write cases (as most of the logic is identical), and add
movntq and variants (as they're very similar).

Extend the testing code to also exercise these instructions.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/xen/arch/x86/hvm/emulate.c b/xen/arch/x86/hvm/emulate.c
index 0d6967a21c..15f413c576 100644
--- a/xen/arch/x86/hvm/emulate.c
+++ b/xen/arch/x86/hvm/emulate.c
@@ -16,6 +16,7 @@
 #include <xen/paging.h>
 #include <xen/trace.h>
 #include <asm/event.h>
+#include <asm/xstate.h>
 #include <asm/hvm/emulate.h>
 #include <asm/hvm/hvm.h>
 #include <asm/hvm/trace.h>
@@ -928,6 +929,20 @@ static int hvmemul_get_fpu(
         if ( !cpu_has_mmx )
             return X86EMUL_UNHANDLEABLE;
         break;
+    case X86EMUL_FPU_xmm:
+        if ( !cpu_has_xmm ||
+             (curr->arch.hvm_vcpu.guest_cr[0] & X86_CR0_EM) ||
+             !(curr->arch.hvm_vcpu.guest_cr[4] & X86_CR4_OSFXSR) )
+            return X86EMUL_UNHANDLEABLE;
+        break;
+    case X86EMUL_FPU_ymm:
+        if ( !(curr->arch.hvm_vcpu.guest_cr[0] & X86_CR0_PE) ||
+             vm86_mode(ctxt->regs) ||
+             !(curr->arch.hvm_vcpu.guest_cr[4] & X86_CR4_OSXSAVE) ||
+             !(curr->arch.xcr0 & XSTATE_SSE) ||
+             !(curr->arch.xcr0 & XSTATE_YMM) )
+            return X86EMUL_UNHANDLEABLE;
+        break;
     default:
         return X86EMUL_UNHANDLEABLE;
     }