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| author | Zhanghaoyu (A) <haoyu.zhang@huawei.com> | 2013-06-14 07:36:13 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-27 10:34:31 -0700 |
| commit | 1819a873d94cd7abeb94f235175052f72fe6fa2c (patch) | |
| tree | 44aadd7fdd0b98cb6398ce85771f601cc068cef7 /lib/random32.c | |
| parent | a0631b300bac987a591ae485d8a19a08aa57b4d2 (diff) | |
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 'lib/random32.c')
0 files changed, 0 insertions, 0 deletions