[RFC,v2,1/3] linux-headers/linux/kvm.h: introduce kvm_userspace_memory_region_list ioctl

Commit Message

Emanuele Giuseppe Esposito Sept. 9, 2022, 8:11 a.m. UTC

Introduce new KVM_SET_USER_MEMORY_REGION_LIST ioctl and
kvm_userspace_memory_region_list that will be used to pass
multiple memory region updates at once to KVM.

Signed-off-by: Emanuele Giuseppe Esposito <[e-mail]>
---
 linux-headers/linux/kvm.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

Patch

diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index f089349149..671cdfb8de 100644
--- a/linux-headers/linux/kvm.h
+++ b/linux-headers/linux/kvm.h
@@ -103,6 +103,24 @@  struct kvm_userspace_memory_region {
 	__u64 userspace_addr; /* start of the userspace allocated memory */
 };
 
+/* for KVM_SET_USER_MEMORY_REGION_LIST */
+struct kvm_userspace_memory_region_entry {
+	__u32 slot;
+	__u32 flags;
+	__u64 guest_phys_addr;
+	__u64 memory_size; /* bytes */
+	__u64 userspace_addr; /* start of the userspace allocated memory */
+	__u8 invalidate_slot;
+	__u8 padding[31];
+};
+
+/* for KVM_SET_USER_MEMORY_REGION_LIST */
+struct kvm_userspace_memory_region_list {
+	__u32 nent;
+	__u32 flags;
+	struct kvm_userspace_memory_region_entry entries[0];
+};
+
 /*
  * The bit 0 ~ bit 15 of kvm_memory_region::flags are visible for userspace,
  * other bits are reserved for kvm internal use which are defined in
@@ -1426,6 +1444,8 @@  struct kvm_vfio_spapr_tce {
 					struct kvm_userspace_memory_region)
 #define KVM_SET_TSS_ADDR          _IO(KVMIO,   0x47)
 #define KVM_SET_IDENTITY_MAP_ADDR _IOW(KVMIO,  0x48, __u64)
+#define KVM_SET_USER_MEMORY_REGION_LIST _IOW(KVMIO, 0x49, \
+					struct kvm_userspace_memory_region_list)
 
 /* enable ucontrol for s390 */
 struct kvm_s390_ucas_mapping {