diff options
| author | Xiao Guangrong <guangrong.xiao@linux.intel.com> | 2015-05-11 22:55:21 +0800 |
|---|---|---|
| committer | Luis Henriques <luis.henriques@canonical.com> | 2015-06-02 12:08:13 +0100 |
| commit | f1c43caf6f290cc6e173688b95ffbadae89bc698 (patch) | |
| tree | c6c1e60843fdc31d376a4e515139015e7e299ada /drivers | |
| parent | c704bfbd17e5e375625921e3b4d8a8d9813b66bf (diff) | |
KVM: MMU: fix SMAP virtualization
commit 0be0226f07d14b153a5eedf2bb86e1eb7dcefab5 upstream.
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>
[ luis: backported to 3.16: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions