| Message ID | 20200807084841.7112-2-chenyi.qiang@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | KVM: PKS Virtualization support | expand |
On Fri, Aug 7, 2020 at 1:46 AM Chenyi Qiang <chenyi.qiang@intel.com> wrote: > > PKS(Protection Keys for Supervisor Pages) is a feature that extends the > Protection Key architecture to support thread-specific permission > restrictions on supervisor pages. > > A new PKS MSR(PKRS) is defined in kernel to support PKS, which holds a > set of permissions associated with each protection domian. > > Two VMCS fields {HOST,GUEST}_IA32_PKRS are introduced in > {host,guest}-state area to store the value of PKRS. > > Every VM exit saves PKRS into guest-state area. > If VM_EXIT_LOAD_IA32_PKRS = 1, VM exit loads PKRS from the host-state > area. > If VM_ENTRY_LOAD_IA32_PKRS = 1, VM entry loads PKRS from the guest-state > area. > > Signed-off-by: Chenyi Qiang <chenyi.qiang@intel.com> Reviewed-by: Jim Mattson <jmattson@google.com>
diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h index cd7de4b401fe..425cf81dd722 100644 --- a/arch/x86/include/asm/vmx.h +++ b/arch/x86/include/asm/vmx.h @@ -94,6 +94,7 @@ #define VM_EXIT_CLEAR_BNDCFGS 0x00800000 #define VM_EXIT_PT_CONCEAL_PIP 0x01000000 #define VM_EXIT_CLEAR_IA32_RTIT_CTL 0x02000000 +#define VM_EXIT_LOAD_IA32_PKRS 0x20000000 #define VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR 0x00036dff @@ -107,6 +108,7 @@ #define VM_ENTRY_LOAD_BNDCFGS 0x00010000 #define VM_ENTRY_PT_CONCEAL_PIP 0x00020000 #define VM_ENTRY_LOAD_IA32_RTIT_CTL 0x00040000 +#define VM_ENTRY_LOAD_IA32_PKRS 0x00400000 #define VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR 0x000011ff @@ -243,12 +245,16 @@ enum vmcs_field { GUEST_BNDCFGS_HIGH = 0x00002813, GUEST_IA32_RTIT_CTL = 0x00002814, GUEST_IA32_RTIT_CTL_HIGH = 0x00002815, + GUEST_IA32_PKRS = 0x00002818, + GUEST_IA32_PKRS_HIGH = 0x00002819, HOST_IA32_PAT = 0x00002c00, HOST_IA32_PAT_HIGH = 0x00002c01, HOST_IA32_EFER = 0x00002c02, HOST_IA32_EFER_HIGH = 0x00002c03, HOST_IA32_PERF_GLOBAL_CTRL = 0x00002c04, HOST_IA32_PERF_GLOBAL_CTRL_HIGH = 0x00002c05, + HOST_IA32_PKRS = 0x00002c06, + HOST_IA32_PKRS_HIGH = 0x00002c07, PIN_BASED_VM_EXEC_CONTROL = 0x00004000, CPU_BASED_VM_EXEC_CONTROL = 0x00004002, EXCEPTION_BITMAP = 0x00004004,
PKS(Protection Keys for Supervisor Pages) is a feature that extends the Protection Key architecture to support thread-specific permission restrictions on supervisor pages. A new PKS MSR(PKRS) is defined in kernel to support PKS, which holds a set of permissions associated with each protection domian. Two VMCS fields {HOST,GUEST}_IA32_PKRS are introduced in {host,guest}-state area to store the value of PKRS. Every VM exit saves PKRS into guest-state area. If VM_EXIT_LOAD_IA32_PKRS = 1, VM exit loads PKRS from the host-state area. If VM_ENTRY_LOAD_IA32_PKRS = 1, VM entry loads PKRS from the guest-state area. Signed-off-by: Chenyi Qiang <chenyi.qiang@intel.com> --- arch/x86/include/asm/vmx.h | 6 ++++++ 1 file changed, 6 insertions(+)