Copy over the uapi definitions from the Documentation/ directory.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 include/uapi/linux/kvm.h | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 1e0a511c43d0..b0cca93ebcb3 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -135,6 +135,16 @@ struct kvm_xen_exit {
 	} u;
 };
 
+struct kvm_plane_event_exit {
+#define KVM_PLANE_EVENT_INTERRUPT    1
+	__u16 cause;
+	__u16 pending_event_planes;
+	__u16 target;
+	__u16 padding;
+	__u32 flags;
+	__u64 extra[8];
+};
+
 struct kvm_tdx_exit {
 #define KVM_EXIT_TDX_VMCALL     1
         __u32 type;
@@ -262,7 +272,8 @@ struct kvm_tdx_exit {
 #define KVM_EXIT_NOTIFY           37
 #define KVM_EXIT_LOONGARCH_IOCSR  38
 #define KVM_EXIT_MEMORY_FAULT     39
-#define KVM_EXIT_TDX              40
+#define KVM_EXIT_PLANE_EVENT      40
+#define KVM_EXIT_TDX              41
 
 /* For KVM_EXIT_INTERNAL_ERROR */
 /* Emulate instruction failed. */
@@ -295,7 +306,13 @@ struct kvm_run {
 	/* in */
 	__u8 request_interrupt_window;
 	__u8 HINT_UNSAFE_IN_KVM(immediate_exit);
-	__u8 padding1[6];
+
+	/* in/out */
+	__u8 plane;
+	__u16 suspended_planes;
+
+	/* in */
+	__u16 req_exit_planes;
 
 	/* out */
 	__u32 exit_reason;
@@ -532,6 +549,8 @@ struct kvm_run {
 			__u64 gpa;
 			__u64 size;
 		} memory_fault;
+		/* KVM_EXIT_PLANE_EVENT */
+		struct kvm_plane_event_exit plane_event;
 		/* KVM_EXIT_TDX */
 		struct kvm_tdx_exit tdx;
 		/* Fix the size of the union. */
@@ -1017,6 +1036,8 @@ struct kvm_enable_cap {
 #define KVM_CAP_PRE_FAULT_MEMORY 236
 #define KVM_CAP_X86_APIC_BUS_CYCLES_NS 237
 #define KVM_CAP_X86_GUEST_MODE 238
+#define KVM_CAP_PLANES 239
+#define KVM_CAP_PLANES_FPU 240
 
 struct kvm_irq_routing_irqchip {
 	__u32 irqchip;
-- 
2.49.0

On Tue, Apr 01, 2025, Paolo Bonzini wrote:
> Copy over the uapi definitions from the Documentation/ directory.
> 
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>  include/uapi/linux/kvm.h | 25 +++++++++++++++++++++++--
>  1 file changed, 23 insertions(+), 2 deletions(-)
> 
> diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
> index 1e0a511c43d0..b0cca93ebcb3 100644
> --- a/include/uapi/linux/kvm.h
> +++ b/include/uapi/linux/kvm.h
> @@ -135,6 +135,16 @@ struct kvm_xen_exit {
>  	} u;
>  };
>  
> +struct kvm_plane_event_exit {
> +#define KVM_PLANE_EVENT_INTERRUPT    1
> +	__u16 cause;
> +	__u16 pending_event_planes;
> +	__u16 target;
> +	__u16 padding;
> +	__u32 flags;
> +	__u64 extra[8];
> +};
> +
>  struct kvm_tdx_exit {
>  #define KVM_EXIT_TDX_VMCALL     1
>          __u32 type;
> @@ -262,7 +272,8 @@ struct kvm_tdx_exit {
>  #define KVM_EXIT_NOTIFY           37
>  #define KVM_EXIT_LOONGARCH_IOCSR  38
>  #define KVM_EXIT_MEMORY_FAULT     39
> -#define KVM_EXIT_TDX              40
> +#define KVM_EXIT_PLANE_EVENT      40
> +#define KVM_EXIT_TDX              41
>  
>  /* For KVM_EXIT_INTERNAL_ERROR */
>  /* Emulate instruction failed. */
> @@ -295,7 +306,13 @@ struct kvm_run {
>  	/* in */
>  	__u8 request_interrupt_window;
>  	__u8 HINT_UNSAFE_IN_KVM(immediate_exit);
> -	__u8 padding1[6];
> +
> +	/* in/out */
> +	__u8 plane;

We should add padding before or after "plane"; there's a 1-byte hole here that's
hard to spot at first glance (ran pahole just to verify my eyeballs):

  struct kvm_run {
	__u8                       request_interrupt_window; /*     0     1 */
	__u8                       immediate_exit__unsafe; /*     1     1 */
	__u8                       plane;                /*     2     1 */

	/* XXX 1 byte hole, try to pack */

	__u16                      suspended_planes;     /*     4     2 */
	__u16                      req_exit_planes;      /*     6     2 */
  }

Probably pad before, so that "plane" is just before the xxx_planes fields?