This will be needed to extend the kvm selftest program.
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
---
tools/include/uapi/linux/kvm.h | 36 ++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/tools/include/uapi/linux/kvm.h b/tools/include/uapi/linux/kvm.h
index 52641d8ca9e8..17df0de21cce 100644
--- a/tools/include/uapi/linux/kvm.h
+++ b/tools/include/uapi/linux/kvm.h
@@ -235,6 +235,7 @@ struct kvm_hyperv_exit {
#define KVM_EXIT_S390_STSI 25
#define KVM_EXIT_IOAPIC_EOI 26
#define KVM_EXIT_HYPERV 27
+#define KVM_EXIT_DIRTY_RING_FULL 28
/* For KVM_EXIT_INTERNAL_ERROR */
/* Emulate instruction failed. */
@@ -246,6 +247,11 @@ struct kvm_hyperv_exit {
/* Encounter unexpected vm-exit reason */
#define KVM_INTERNAL_ERROR_UNEXPECTED_EXIT_REASON 4
+struct kvm_dirty_ring_indices {
+ __u32 avail_index; /* set by kernel */
+ __u32 fetch_index; /* set by userspace */
+};
+
/* for KVM_RUN, returned by mmap(vcpu_fd, offset=0) */
struct kvm_run {
/* in */
@@ -415,6 +421,13 @@ struct kvm_run {
struct kvm_sync_regs regs;
char padding[SYNC_REGS_SIZE_BYTES];
} s;
+
+ struct kvm_dirty_ring_indices vcpu_ring_indices;
+};
+
+/* Returned by mmap(kvm->fd, offset=0) */
+struct kvm_vm_run {
+ struct kvm_dirty_ring_indices vm_ring_indices;
};
/* for KVM_REGISTER_COALESCED_MMIO / KVM_UNREGISTER_COALESCED_MMIO */
@@ -1000,6 +1013,7 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_PMU_EVENT_FILTER 173
#define KVM_CAP_ARM_IRQ_LINE_LAYOUT_2 174
#define KVM_CAP_HYPERV_DIRECT_TLBFLUSH 175
+#define KVM_CAP_DIRTY_LOG_RING 176
#ifdef KVM_CAP_IRQ_ROUTING
@@ -1461,6 +1475,9 @@ struct kvm_enc_region {
/* Available with KVM_CAP_ARM_SVE */
#define KVM_ARM_VCPU_FINALIZE _IOW(KVMIO, 0xc2, int)
+/* Available with KVM_CAP_DIRTY_LOG_RING */
+#define KVM_RESET_DIRTY_RINGS _IO(KVMIO, 0xc3)
+
/* Secure Encrypted Virtualization command */
enum sev_cmd_id {
/* Guest initialization commands */
@@ -1611,4 +1628,23 @@ struct kvm_hyperv_eventfd {
#define KVM_HYPERV_CONN_ID_MASK 0x00ffffff
#define KVM_HYPERV_EVENTFD_DEASSIGN (1 << 0)
+/*
+ * The following are the requirements for supporting dirty log ring
+ * (by enabling KVM_DIRTY_LOG_PAGE_OFFSET).
+ *
+ * 1. Memory accesses by KVM should call kvm_vcpu_write_* instead
+ * of kvm_write_* so that the global dirty ring is not filled up
+ * too quickly.
+ * 2. kvm_arch_mmu_enable_log_dirty_pt_masked should be defined for
+ * enabling dirty logging.
+ * 3. There should not be a separate step to synchronize hardware
+ * dirty bitmap with KVM's.
+ */
+
+struct kvm_dirty_gfn {
+ __u32 pad;
+ __u32 slot;
+ __u64 offset;
+};
+
#endif /* __LINUX_KVM_H */
--
2.24.1
