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authorZhihui Zhang <zzhsuny@gmail.com>2013-12-30 15:56:29 -0500
committerMarcelo Tosatti <mtosatti@redhat.com>2014-01-08 19:01:40 -0200
commit2f0a6397dd3cac2fb05b46cad08c1d532c04d6b8 (patch)
tree2a68f99698169b20ed597e36bddfa9725275b712 /virt/kvm
parent171800328f6e2443e0e356de5b41fb7e0fff4448 (diff)
downloadlinux-linaro-stable-2f0a6397dd3cac2fb05b46cad08c1d532c04d6b8.tar.gz
KVM: VMX: check use I/O bitmap first before unconditional I/O exit
According to Table C-1 of Intel SDM 3C, a VM exit happens on an I/O instruction when "use I/O bitmaps" VM-execution control was 0 _and_ the "unconditional I/O exiting" VM-execution control was 1. So we can't just check "unconditional I/O exiting" alone. This patch was improved by suggestion from Jan Kiszka. Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Zhihui Zhang <zzhsuny@gmail.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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