[v2,4/8] KVM: x86: Add X86EMUL_F_INVTLB and pass it in em_invlpg()
Commit Message
From: Binbin Wu <binbin.wu@linux.intel.com>
Add an emulation flag X86EMUL_F_INVTLB, 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().
Signed-off-by: Binbin Wu <binbin.wu@linux.intel.com>
Signed-off-by: Zeng Guang <guang.zeng@intel.com>
---
arch/x86/kvm/emulate.c | 4 +++-
arch/x86/kvm/kvm_emulate.h | 1 +
2 files changed, 4 insertions(+), 1 deletion(-)
@@ -3443,8 +3443,10 @@ static int em_invlpg(struct x86_emulate_ctxt *ctxt)
{
int rc;
ulong linear;
+ unsigned 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_INVTLB);
if (rc == X86EMUL_CONTINUE)
ctxt->ops->invlpg(ctxt, linear);
/* Disable writeback. */
@@ -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_INVTLB BIT(4)
struct x86_emulate_ops {
void (*vm_bugged)(struct x86_emulate_ctxt *ctxt);