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authorPaolo Bonzini <pbonzini@redhat.com>2013-05-09 11:32:51 +0200
committerGleb Natapov <gleb@redhat.com>2013-05-09 13:15:08 +0300
commit326f578f7e1443bac2333712dd130a261ec15288 (patch)
tree7d1e6123f831b6789f68d4e9ea0f7f10a904230b /virt
parent7fa57952d70f5737513d8319395e471d107e4e0d (diff)
downloadlinux-326f578f7e1443bac2333712dd130a261ec15288.tar.gz
KVM: emulator: emulate SALC
This is an almost-undocumented instruction available in 32-bit mode. I say "almost" undocumented because AMD documents it in their opcode maps just to say that it is unavailable in 64-bit mode (sections "A.2.1 One-Byte Opcodes" and "B.3 Invalid and Reassigned Instructions in 64-Bit Mode"). It is roughly equivalent to "sbb %al, %al" except it does not set the flags. Use fastop to emulate it, but do not use the opcode directly because it would fail if the host is 64-bit! Reported-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Cc: stable@vger.kernel.org # 3.9 Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Gleb Natapov <gleb@redhat.com>
Diffstat (limited to 'virt')
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