diff mbox

[V4,2/6] x86/hvm: pkeys, add pkeys support when setting CR4

Message ID 1450682504-32286-3-git-send-email-huaitong.han@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Huaitong Han Dec. 21, 2015, 7:21 a.m. UTC 
This patch adds pkeys support when setting CR4.

Signed-off-by: Huaitong Han <huaitong.han@intel.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
---
 xen/arch/x86/hvm/hvm.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Comments

Jan Beulich Dec. 21, 2015, 3 p.m. UTC | #1 
>>> On 21.12.15 at 08:21, <huaitong.han@intel.com> wrote:
> This patch adds pkeys support when setting CR4.

Btw there's little point in a commit message simply repeating the
title.

Jan
diff mbox

Patch

diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index db0aeba..59916ed 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -1924,6 +1924,7 @@  static unsigned long hvm_cr4_guest_reserved_bits(const struct vcpu *v,
         leaf1_edx = boot_cpu_data.x86_capability[cpufeat_word(X86_FEATURE_VME)];
         leaf1_ecx = boot_cpu_data.x86_capability[cpufeat_word(X86_FEATURE_PCID)];
         leaf7_0_ebx = boot_cpu_data.x86_capability[cpufeat_word(X86_FEATURE_FSGSBASE)];
+        leaf7_0_ecx = boot_cpu_data.x86_capability[cpufeat_word(X86_FEATURE_PKU)];
     }
 
     return ~(unsigned long)
@@ -1959,7 +1960,9 @@  static unsigned long hvm_cr4_guest_reserved_bits(const struct vcpu *v,
              (leaf7_0_ebx & cpufeat_mask(X86_FEATURE_SMEP) ?
               X86_CR4_SMEP : 0) |
              (leaf7_0_ebx & cpufeat_mask(X86_FEATURE_SMAP) ?
-              X86_CR4_SMAP : 0));
+              X86_CR4_SMAP : 0) |
+              (leaf7_0_ecx & cpufeat_mask(X86_FEATURE_PKU) ?
+              X86_CR4_PKE : 0));
 }
 
 static int hvm_load_cpu_ctxt(struct domain *d, hvm_domain_context_t *h)