arch/loongarch/include/uapi/asm/kvm.h

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

File Facts

System
Linux kernel
Corpus path
arch/loongarch/include/uapi/asm/kvm.h
Extension
.h
Size
5085 bytes
Lines
163
Domain
Architecture Layer
Bucket
arch/loongarch
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

struct kvm_regs {
	/* out (KVM_GET_REGS) / in (KVM_SET_REGS) */
	__u64 gpr[32];
	__u64 pc;
};

/*
 * for KVM_GET_FPU and KVM_SET_FPU
 */
struct kvm_fpu {
	__u32 fcsr;
	__u64 fcc;    /* 8x8 */
	struct kvm_fpureg {
		__u64 val64[4];
	} fpr[32];
};

/*
 * For LoongArch, we use KVM_SET_ONE_REG and KVM_GET_ONE_REG to access various
 * registers.  The id field is broken down as follows:
 *
 *  bits[63..52] - As per linux/kvm.h
 *  bits[51..32] - Must be zero.
 *  bits[31..16] - Register set.
 *
 * Register set = 0: GP registers from kvm_regs (see definitions below).
 *
 * Register set = 1: CSR registers.
 *
 * Register set = 2: KVM specific registers (see definitions below).
 *
 * Register set = 3: FPU / SIMD registers (see definitions below).
 *
 * Other sets registers may be added in the future.  Each set would
 * have its own identifier in bits[31..16].
 */

#define KVM_REG_LOONGARCH_GPR		(KVM_REG_LOONGARCH | 0x00000ULL)
#define KVM_REG_LOONGARCH_CSR		(KVM_REG_LOONGARCH | 0x10000ULL)
#define KVM_REG_LOONGARCH_KVM		(KVM_REG_LOONGARCH | 0x20000ULL)
#define KVM_REG_LOONGARCH_FPSIMD	(KVM_REG_LOONGARCH | 0x30000ULL)
#define KVM_REG_LOONGARCH_CPUCFG	(KVM_REG_LOONGARCH | 0x40000ULL)
#define KVM_REG_LOONGARCH_LBT		(KVM_REG_LOONGARCH | 0x50000ULL)
#define KVM_REG_LOONGARCH_MASK		(KVM_REG_LOONGARCH | 0x70000ULL)
#define KVM_CSR_IDX_MASK		0x7fff
#define KVM_CPUCFG_IDX_MASK		0x7fff

/*
 * KVM_REG_LOONGARCH_KVM - KVM specific control registers.
 */

#define KVM_REG_LOONGARCH_COUNTER	(KVM_REG_LOONGARCH_KVM | KVM_REG_SIZE_U64 | 1)
#define KVM_REG_LOONGARCH_VCPU_RESET	(KVM_REG_LOONGARCH_KVM | KVM_REG_SIZE_U64 | 2)
/* Debugging: Special instruction for software breakpoint */
#define KVM_REG_LOONGARCH_DEBUG_INST	(KVM_REG_LOONGARCH_KVM | KVM_REG_SIZE_U64 | 3)

/* LBT registers */
#define KVM_REG_LOONGARCH_LBT_SCR0	(KVM_REG_LOONGARCH_LBT | KVM_REG_SIZE_U64 | 1)
#define KVM_REG_LOONGARCH_LBT_SCR1	(KVM_REG_LOONGARCH_LBT | KVM_REG_SIZE_U64 | 2)
#define KVM_REG_LOONGARCH_LBT_SCR2	(KVM_REG_LOONGARCH_LBT | KVM_REG_SIZE_U64 | 3)
#define KVM_REG_LOONGARCH_LBT_SCR3	(KVM_REG_LOONGARCH_LBT | KVM_REG_SIZE_U64 | 4)
#define KVM_REG_LOONGARCH_LBT_EFLAGS	(KVM_REG_LOONGARCH_LBT | KVM_REG_SIZE_U64 | 5)
#define KVM_REG_LOONGARCH_LBT_FTOP	(KVM_REG_LOONGARCH_LBT | KVM_REG_SIZE_U64 | 6)

#define LOONGARCH_REG_SHIFT		3
#define LOONGARCH_REG_64(TYPE, REG)	(TYPE | KVM_REG_SIZE_U64 | (REG << LOONGARCH_REG_SHIFT))
#define KVM_IOC_CSRID(REG)		LOONGARCH_REG_64(KVM_REG_LOONGARCH_CSR, REG)
#define KVM_IOC_CPUCFG(REG)		LOONGARCH_REG_64(KVM_REG_LOONGARCH_CPUCFG, REG)

/* Device Control API on vm fd */
#define KVM_LOONGARCH_VM_FEAT_CTRL		0
#define  KVM_LOONGARCH_VM_FEAT_LSX		0
#define  KVM_LOONGARCH_VM_FEAT_LASX		1
#define  KVM_LOONGARCH_VM_FEAT_X86BT		2
#define  KVM_LOONGARCH_VM_FEAT_ARMBT		3
#define  KVM_LOONGARCH_VM_FEAT_MIPSBT		4
#define  KVM_LOONGARCH_VM_FEAT_PMU		5
#define  KVM_LOONGARCH_VM_FEAT_PV_IPI		6
#define  KVM_LOONGARCH_VM_FEAT_PV_STEALTIME	7
#define  KVM_LOONGARCH_VM_FEAT_PTW		8
#define  KVM_LOONGARCH_VM_FEAT_MSGINT		9
#define  KVM_LOONGARCH_VM_FEAT_PV_PREEMPT	10

/* Device Control API on vcpu fd */
#define KVM_LOONGARCH_VCPU_CPUCFG	0
#define KVM_LOONGARCH_VCPU_PVTIME_CTRL	1
#define  KVM_LOONGARCH_VCPU_PVTIME_GPA	0

struct kvm_debug_exit_arch {
};

Annotation

Implementation Notes