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| author | Xiao Guangrong <guangrong.xiao@linux.intel.com> | 2015-05-11 17:55:21 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-05-19 21:52:36 +0300 |
| commit | edc90b7dc4ceef62ef0ad9cc6c3f5dc770e83ad2 (patch) | |
| tree | 36a2ab127ab4f6a01fc33190abf3e06682f6ceba /arch/x86/kernel/kvmclock.c | |
| parent | 428e3d08574b77876ea5e71f294f91bd8afa51b5 (diff) | |
| download | linux-edc90b7dc4ceef62ef0ad9cc6c3f5dc770e83ad2.tar.xz | |
KVM: MMU: fix SMAP virtualization
KVM may turn a user page to a kernel page when kernel writes a readonly
user page if CR0.WP = 1. This shadow page entry will be reused after
SMAP is enabled so that kernel is allowed to access this user page
Fix it by setting SMAP && !CR0.WP into shadow page's role and reset mmu
once CR4.SMAP is updated
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kernel/kvmclock.c')
0 files changed, 0 insertions, 0 deletions