From: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
Add a flag for TDX to mark dirty logging as unsupported.
Suggested-by: Kai Huang <kai.huang@xxxxxxxxx>
Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
Signed-off-by: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>
---
include/linux/kvm_host.h | 1 +
virt/kvm/kvm_main.c | 5 ++++-
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 7ee7104b4b59..74bc55df7a5d 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -597,6 +597,7 @@ struct kvm {
unsigned int max_halt_poll_ns;
u32 dirty_ring_size;
+ bool dirty_log_unsupported;
#ifdef __KVM_HAVE_READONLY_MEM
bool readonly_mem_unsupported;
#endif
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 63d0c2833913..8b075b5e7303 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1261,7 +1261,10 @@ static void update_memslots(struct kvm_memslots *slots,
static int check_memory_region_flags(struct kvm *kvm,
const struct kvm_userspace_memory_region *mem)
{
- u32 valid_flags = KVM_MEM_LOG_DIRTY_PAGES;
+ u32 valid_flags = 0;
+
+ if (!kvm->dirty_log_unsupported)
+ valid_flags |= KVM_MEM_LOG_DIRTY_PAGES;
#ifdef __KVM_HAVE_READONLY_MEM
if (!kvm->readonly_mem_unsupported)
--
2.25.1
