This in particular prevents updating guest IP when handling the retry
needed to forward the memory access to qemu.
Signed-off-by: Jan Beulich <jbeul...@suse.com>
--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -4178,6 +4178,8 @@ x86_emulate(
if ( !rc && (b & 1) && (ea.type == OP_MEM) )
rc = ops->write(ea.mem.seg, ea.mem.off, mmvalp,
ea.bytes, ctxt);
+ if ( rc )
+ goto done;
dst.type = OP_NONE;
break;
}
@@ -4430,6 +4432,8 @@ x86_emulate(
if ( !rc && (b != 0x6f) && (ea.type == OP_MEM) )
rc = ops->write(ea.mem.seg, ea.mem.off, mmvalp,
ea.bytes, ctxt);
+ if ( rc )
+ goto done;
dst.type = OP_NONE;
break;
}
x86emul: suppress writeback upon unsuccessful MMX/SSE/AVX insn emulation
This in particular prevents updating guest IP when handling the retry
needed to forward the memory access to qemu.
Signed-off-by: Jan Beulich <jbeul...@suse.com>
--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -4178,6 +4178,8 @@ x86_emulate(
if ( !rc && (b & 1) && (ea.type == OP_MEM) )
rc = ops->write(ea.mem.seg, ea.mem.off, mmvalp,
ea.bytes, ctxt);
+ if ( rc )
+ goto done;
dst.type = OP_NONE;
break;
}
@@ -4430,6 +4432,8 @@ x86_emulate(
if ( !rc && (b != 0x6f) && (ea.type == OP_MEM) )
rc = ops->write(ea.mem.seg, ea.mem.off, mmvalp,
ea.bytes, ctxt);
+ if ( rc )
+ goto done;
dst.type = OP_NONE;
break;
}
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