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

Message ID 20211119134739.20218-3-chao.p.peng@linux.intel.com (mailing list archive)
State New
Headers show
Series KVM: mm: fd-based approach for supporting KVM guest private memory | expand

Commit Message

Chao Peng Nov. 19, 2021, 1:47 p.m. UTC 
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(+)
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Patch

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. */