Messages in this thread Patch in this message |  | | From | Lei Wang <> | Subject | [PATCH v7 1/8] KVM: VMX: Introduce PKS VMCS fields | Date | Sun, 24 Apr 2022 03:15:50 -0700 |
| |
From: Chenyi Qiang <chenyi.qiang@intel.com>
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 domain.
Two VMCS fields {HOST,GUEST}_IA32_PKRS are introduced in {host,guest}-state area to store the respective values 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> --- arch/x86/include/asm/vmx.h | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h index 0ffaa3156a4e..7962d506ba91 100644 --- a/arch/x86/include/asm/vmx.h +++ b/arch/x86/include/asm/vmx.h @@ -95,6 +95,7 @@ #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 @@ -108,6 +109,7 @@ #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 @@ -245,12 +247,16 @@ 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, -- 2.25.1
|  |