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| author | Huaitong Han <huaitong.han@intel.com> | 2016-03-22 16:51:20 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-03-22 16:23:37 +0100 |
| commit | be94f6b71067df47d623fc6c6983a8dee504fb4d (patch) | |
| tree | c19c2f42c18e328bbb6efff88e286bce23c779f1 /arch/x86/kvm/kvm_cache_regs.h | |
| parent | 2d344105f57ca77fc9c5d4377f65d1082f71ac4b (diff) | |
| download | lwn-be94f6b71067df47d623fc6c6983a8dee504fb4d.tar.gz lwn-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/kvm_cache_regs.h')
| -rw-r--r-- | arch/x86/kvm/kvm_cache_regs.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kvm/kvm_cache_regs.h b/arch/x86/kvm/kvm_cache_regs.h index e1e89ee4af75..762cdf2595f9 100644 --- a/arch/x86/kvm/kvm_cache_regs.h +++ b/arch/x86/kvm/kvm_cache_regs.h @@ -84,6 +84,11 @@ static inline u64 kvm_read_edx_eax(struct kvm_vcpu *vcpu) | ((u64)(kvm_register_read(vcpu, VCPU_REGS_RDX) & -1u) << 32); } +static inline u32 kvm_read_pkru(struct kvm_vcpu *vcpu) +{ + return kvm_x86_ops->get_pkru(vcpu); +} + static inline void enter_guest_mode(struct kvm_vcpu *vcpu) { vcpu->arch.hflags |= HF_GUEST_MASK; |