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| author |   Xiao Guangrong <guangrong.xiao@linux.intel.com> | 2015-05-11 22:55:21 +0800 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2015-05-11 17:17:50 +0200 |
| commit | 0be0226f07d14b153a5eedf2bb86e1eb7dcefab5 (patch) | |
| tree | a69e9c24597cd620922617e6315ba07b7bd63ca3 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | KVM: MMU: fix CR4.SMEP=1, CR0.WP=0 with shadow pages (diff) | |
| download | linux-dev-0be0226f07d14b153a5eedf2bb86e1eb7dcefab5.tar.xz linux-dev-0be0226f07d14b153a5eedf2bb86e1eb7dcefab5.zip | |
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>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions