diff mbox series

[v11,03/16] KVM: x86: Add an emulation flag for implicit system access

Message ID 20230913124227.12574-4-binbin.wu@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series LAM and LASS KVM Enabling | expand

Commit Message

Binbin Wu Sept. 13, 2023, 12:42 p.m. UTC 
Add an emulation flag X86EMUL_F_IMPLICIT to identify implicit system access
in instruction emulation.

Linear Address Space Separation (LASS) treats data access a supervisor-mode
access if it implicitly accessed a system data structure. The flag will be
consumed to support LASS virtualization.

Signed-off-by: Binbin Wu <binbin.wu@linux.intel.com>
Tested-by: Xuelian Guo <xuelian.guo@intel.com>
---
 arch/x86/kvm/kvm_emulate.h | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/arch/x86/kvm/kvm_emulate.h b/arch/x86/kvm/kvm_emulate.h
index e1fd83908334..5f9869018332 100644
--- a/arch/x86/kvm/kvm_emulate.h
+++ b/arch/x86/kvm/kvm_emulate.h
@@ -92,6 +92,7 @@  struct x86_instruction_info {
 #define X86EMUL_F_WRITE			BIT(0)
 #define X86EMUL_F_FETCH			BIT(1)
 #define X86EMUL_F_BRANCH		BIT(2)
+#define X86EMUL_F_IMPLICIT		BIT(3)
 
 struct x86_emulate_ops {
 	void (*vm_bugged)(struct x86_emulate_ctxt *ctxt);