tools/arch/s390/include/uapi/asm/kvm.h

Source file repositories/reference/linux-study-clean/tools/arch/s390/include/uapi/asm/kvm.h

File Facts

System
Linux kernel
Corpus path
tools/arch/s390/include/uapi/asm/kvm.h
Extension
.h
Size
15885 bytes
Lines
623
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

struct kvm_s390_skeys {
	__u64 start_gfn;
	__u64 count;
	__u64 skeydata_addr;
	__u32 flags;
	__u32 reserved[9];
};

#define KVM_S390_CMMA_PEEK (1 << 0)

/**
 * kvm_s390_cmma_log - Used for CMMA migration.
 *
 * Used both for input and output.
 *
 * @start_gfn: Guest page number to start from.
 * @count: Size of the result buffer.
 * @flags: Control operation mode via KVM_S390_CMMA_* flags
 * @remaining: Used with KVM_S390_GET_CMMA_BITS. Indicates how many dirty
 *             pages are still remaining.
 * @mask: Used with KVM_S390_SET_CMMA_BITS. Bitmap of bits to actually set
 *        in the PGSTE.
 * @values: Pointer to the values buffer.
 *
 * Used in KVM_S390_{G,S}ET_CMMA_BITS ioctls.
 */
struct kvm_s390_cmma_log {
	__u64 start_gfn;
	__u32 count;
	__u32 flags;
	union {
		__u64 remaining;
		__u64 mask;
	};
	__u64 values;
};

#define KVM_S390_RESET_POR       1
#define KVM_S390_RESET_CLEAR     2
#define KVM_S390_RESET_SUBSYSTEM 4
#define KVM_S390_RESET_CPU_INIT  8
#define KVM_S390_RESET_IPL       16

/* for KVM_S390_MEM_OP */
struct kvm_s390_mem_op {
	/* in */
	__u64 gaddr;		/* the guest address */
	__u64 flags;		/* flags */
	__u32 size;		/* amount of bytes */
	__u32 op;		/* type of operation */
	__u64 buf;		/* buffer in userspace */
	union {
		struct {
			__u8 ar;	/* the access register number */
			__u8 key;	/* access key, ignored if flag unset */
			__u8 pad1[6];	/* ignored */
			__u64 old_addr;	/* ignored if cmpxchg flag unset */
		};
		__u32 sida_offset; /* offset into the sida */
		__u8 reserved[32]; /* ignored */
	};
};
/* types for kvm_s390_mem_op->op */
#define KVM_S390_MEMOP_LOGICAL_READ	0
#define KVM_S390_MEMOP_LOGICAL_WRITE	1
#define KVM_S390_MEMOP_SIDA_READ	2
#define KVM_S390_MEMOP_SIDA_WRITE	3
#define KVM_S390_MEMOP_ABSOLUTE_READ	4
#define KVM_S390_MEMOP_ABSOLUTE_WRITE	5
#define KVM_S390_MEMOP_ABSOLUTE_CMPXCHG	6

/* flags for kvm_s390_mem_op->flags */
#define KVM_S390_MEMOP_F_CHECK_ONLY		(1ULL << 0)
#define KVM_S390_MEMOP_F_INJECT_EXCEPTION	(1ULL << 1)
#define KVM_S390_MEMOP_F_SKEY_PROTECTION	(1ULL << 2)

/* flags specifying extension support via KVM_CAP_S390_MEM_OP_EXTENSION */
#define KVM_S390_MEMOP_EXTENSION_CAP_BASE	(1 << 0)
#define KVM_S390_MEMOP_EXTENSION_CAP_CMPXCHG	(1 << 1)

struct kvm_s390_psw {
	__u64 mask;
	__u64 addr;
};

/* valid values for type in kvm_s390_interrupt */
#define KVM_S390_SIGP_STOP		0xfffe0000u
#define KVM_S390_PROGRAM_INT		0xfffe0001u
#define KVM_S390_SIGP_SET_PREFIX	0xfffe0002u
#define KVM_S390_RESTART		0xfffe0003u

Annotation

Implementation Notes