From: Zhanghaoyu (A) Date: Fri, 14 Jun 2013 07:36:13 +0000 (+0000) Subject: KVM: x86: remove vcpu's CPL check in host-invoked XCR set X-Git-Tag: v3.10-rc7~11^2~2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=764bcbc5a6d7a2f3e75c9f0e4caa984e2926e346;p=pandora-kernel.git KVM: x86: remove vcpu's CPL check in host-invoked XCR set __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. Cc: stable@vger.kernel.org Signed-off-by: Zhang Haoyu [Tweaks to commit message. - Paolo] Signed-off-by: Paolo Bonzini --- Reading git-diff-tree failed