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authorZhanghaoyu (A) <haoyu.zhang@huawei.com>2013-06-14 11:36:13 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-06-27 22:27:30 +0400
commite6e045d5919fd03aef387c86064f67ea300914dc (patch)
tree6006cb68dc087a9e91a6e769fd4a4a0c78fae7ee /mm/bootmem.c
parent68447fe9bd4f476aba881d2b4d88502e2c8807fe (diff)
downloadlinux-e6e045d5919fd03aef387c86064f67ea300914dc.tar.xz
KVM: x86: remove vcpu's CPL check in host-invoked XCR set
commit 764bcbc5a6d7a2f3e75c9f0e4caa984e2926e346 upstream. __kvm_set_xcr function does the CPL check when set xcr. __kvm_set_xcr is called in two flows, one is invoked by guest, call stack shown as below, handle_xsetbv(or xsetbv_interception) kvm_set_xcr __kvm_set_xcr the other one is invoked by host, for example during system reset: kvm_arch_vcpu_ioctl kvm_vcpu_ioctl_x86_set_xcrs __kvm_set_xcr The former does need the CPL check, but the latter does not. Signed-off-by: Zhang Haoyu <haoyu.zhang@huawei.com> [Tweaks to commit message. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm/bootmem.c')
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