diff options
| author | Huaitong Han | 2016-03-22 09:51:20 +0100 |
|---|---|---|
| committer | Paolo Bonzini | 2016-03-22 16:23:37 +0100 |
| commit | be94f6b71067df47d623fc6c6983a8dee504fb4d (patch) | |
| tree | c19c2f42c18e328bbb6efff88e286bce23c779f1 /arch/x86/kvm/svm.c | |
| parent | KVM, pkeys: introduce pkru_mask to cache conditions (diff) | |
| download | kernel-qcow2-linux-be94f6b71067df47d623fc6c6983a8dee504fb4d.tar.gz kernel-qcow2-linux-be94f6b71067df47d623fc6c6983a8dee504fb4d.tar.xz kernel-qcow2-linux-be94f6b71067df47d623fc6c6983a8dee504fb4d.zip | |
KVM, pkeys: add pkeys support for permission_fault
Protection keys define a new 4-bit protection key field (PKEY) in bits
62:59 of leaf entries of the page tables, the PKEY is an index to PKRU
register(16 domains), every domain has 2 bits(write disable bit, access
disable bit).
Static logic has been produced in update_pkru_bitmask, dynamic logic need
read pkey from page table entries, get pkru value, and deduce the correct
result.
[ Huaitong: Xiao helps to modify many sections. ]
Signed-off-by: Huaitong Han <huaitong.han@intel.com>
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm.c')
| -rw-r--r-- | arch/x86/kvm/svm.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 95070386d599..31346a3f20a5 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1280,6 +1280,11 @@ static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) to_svm(vcpu)->vmcb->save.rflags = rflags; } +static u32 svm_get_pkru(struct kvm_vcpu *vcpu) +{ + return 0; +} + static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg) { switch (reg) { @@ -4347,6 +4352,9 @@ static struct kvm_x86_ops svm_x86_ops = { .cache_reg = svm_cache_reg, .get_rflags = svm_get_rflags, .set_rflags = svm_set_rflags, + + .get_pkru = svm_get_pkru, + .fpu_activate = svm_fpu_activate, .fpu_deactivate = svm_fpu_deactivate, |