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[RFC,06/18] KVM: Add KVM_MEMORY_EXIT_FLAG_USERFAULT

Message ID 20240710234222.2333120-7-jthoughton@google.com (mailing list archive)
State New, archived
Headers show
Series KVM: Post-copy live migration for guest_memfd | expand

Commit Message

James Houghton July 10, 2024, 11:42 p.m. UTC 
This is needed to support returning to userspace when a vCPU attempts to
access a userfault gfn.

Signed-off-by: James Houghton <jthoughton@google.com>
---
 include/uapi/linux/kvm.h | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index c84c24a9678e..6aa99b4587c6 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -429,6 +429,7 @@  struct kvm_run {
 		/* KVM_EXIT_MEMORY_FAULT */
 		struct {
 #define KVM_MEMORY_EXIT_FLAG_PRIVATE	(1ULL << 3)
+#define KVM_MEMORY_EXIT_FLAG_USERFAULT	(1ULL << 4)
 			__u64 flags;
 			__u64 gpa;
 			__u64 size;