[RFC v2 PATCH 02/13] KVM: Add KVM_EXIT_MEMORY_ERROR exit

[Chao Peng]

This new exit allows userspace to handle memory related error. It will
be used for shared memory <-->private memory conversion.

Signed-off-by: Yu Zhang <yu.c.zhang@linux.intel.com>
Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
---
 include/uapi/linux/kvm.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 7c93d61cb19e..7e3a8935534b 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -285,6 +285,18 @@ struct kvm_tdx_exit {
        } u;
 };
 
+struct kvm_memory_exit {
+#define KVM_EXIT_MEM_MAP_SHARED         1
+#define KVM_EXIT_MEM_MAP_PRIVATE        2
+       __u32 type;
+       union {
+               struct {
+                       __u64 gpa;
+                       __u64 size;
+               } map;
+       } u;
+};
+
 #define KVM_S390_GET_SKEYS_NONE   1
 #define KVM_S390_SKEYS_MAX        1048576
 
@@ -324,6 +336,7 @@ struct kvm_tdx_exit {
 #define KVM_EXIT_X86_BUS_LOCK     33
 #define KVM_EXIT_XEN              34
 #define KVM_EXIT_RISCV_SBI        35
+#define KVM_EXIT_MEMORY_ERROR     36
 #define KVM_EXIT_TDX              50   /* dump number to avoid conflict. */
 
 /* For KVM_EXIT_INTERNAL_ERROR */
@@ -542,6 +555,8 @@ struct kvm_run {
                        unsigned long args[6];
                        unsigned long ret[2];
                } riscv_sbi;
+               /* KVM_EXIT_MEMORY_ERROR */
+               struct kvm_memory_exit mem;
                /* KVM_EXIT_TDX_VMCALL */
                struct kvm_tdx_exit tdx;
                /* Fix the size of the union. */
-- 
2.17.1