Add an emulation flag X86EMUL_F_INVLPG, which is used to identify an
instruction that does TLB invalidation without true memory access.
Only invlpg & invlpga implemented in emulator belong to this kind.
invlpga doesn't need additional information for emulation. Just pass
the flag to em_invlpg().
Linear Address Masking (LAM) and Linear Address Space Separation (LASS)
don't apply to addresses that are inputs to TLB invalidation. The flag
will be consumed to support LAM/LASS virtualization.
Signed-off-by: Binbin Wu <binbin.wu@xxxxxxxxxxxxxxx>
Tested-by: Xuelian Guo <xuelian.guo@xxxxxxxxx>
---
arch/x86/kvm/emulate.c | 4 +++-
arch/x86/kvm/kvm_emulate.h | 1 +
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 274d6e7aa0c1..f54e1a2cafa9 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -3441,8 +3441,10 @@ static int em_invlpg(struct x86_emulate_ctxt *ctxt)
{
int rc;
ulong linear;
+ unsigned int max_size;
- rc = linearize(ctxt, ctxt->src.addr.mem, 1, false, &linear);
+ rc = __linearize(ctxt, ctxt->src.addr.mem, &max_size, 1, ctxt->mode,
+ &linear, X86EMUL_F_INVLPG);
if (rc == X86EMUL_CONTINUE)
ctxt->ops->invlpg(ctxt, linear);
/* Disable writeback. */
diff --git a/arch/x86/kvm/kvm_emulate.h b/arch/x86/kvm/kvm_emulate.h
index 5f9869018332..70f329a685fe 100644
--- a/arch/x86/kvm/kvm_emulate.h
+++ b/arch/x86/kvm/kvm_emulate.h
@@ -93,6 +93,7 @@ struct x86_instruction_info {
#define X86EMUL_F_FETCH BIT(1)
#define X86EMUL_F_BRANCH BIT(2)
#define X86EMUL_F_IMPLICIT BIT(3)
+#define X86EMUL_F_INVLPG BIT(4)
struct x86_emulate_ops {
void (*vm_bugged)(struct x86_emulate_ctxt *ctxt);
--
2.25.1
