arch/powerpc/include/uapi/asm/kvm_para.h

Source file repositories/reference/linux-study-clean/arch/powerpc/include/uapi/asm/kvm_para.h

File Facts

System
Linux kernel
Corpus path
arch/powerpc/include/uapi/asm/kvm_para.h
Extension
.h
Size
2140 bytes
Lines
86
Domain
Architecture Layer
Bucket
arch/powerpc
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_vcpu_arch_shared {
	__u64 scratch1;
	__u64 scratch2;
	__u64 scratch3;
	__u64 critical;		/* Guest may not get interrupts if == r1 */
	__u64 sprg0;
	__u64 sprg1;
	__u64 sprg2;
	__u64 sprg3;
	__u64 srr0;
	__u64 srr1;
	__u64 dar;		/* dear on BookE */
	__u64 msr;
	__u32 dsisr;
	__u32 int_pending;	/* Tells the guest if we have an interrupt */
	__u32 sr[16];
	__u32 mas0;
	__u32 mas1;
	__u64 mas7_3;
	__u64 mas2;
	__u32 mas4;
	__u32 mas6;
	__u32 esr;
	__u32 pir;

	/*
	 * SPRG4-7 are user-readable, so we can only keep these consistent
	 * between the shared area and the real registers when there's an
	 * intervening exit to KVM.  This also applies to SPRG3 on some
	 * chips.
	 *
	 * This suffices for access by guest userspace, since in PR-mode
	 * KVM, an exit must occur when changing the guest's MSR[PR].
	 * If the guest kernel writes to SPRG3-7 via the shared area, it
	 * must also use the shared area for reading while in kernel space.
	 */
	__u64 sprg4;
	__u64 sprg5;
	__u64 sprg6;
	__u64 sprg7;
};

#define KVM_SC_MAGIC_R0		0x4b564d21 /* "KVM!" */

#define KVM_HCALL_TOKEN(num)     _EV_HCALL_TOKEN(EV_KVM_VENDOR_ID, num)

#include <asm/epapr_hcalls.h>

#define KVM_FEATURE_MAGIC_PAGE	1

/* Magic page flags from host to guest */

#define KVM_MAGIC_FEAT_SR		(1 << 0)

/* MASn, ESR, PIR, and high SPRGs */
#define KVM_MAGIC_FEAT_MAS0_TO_SPRG7	(1 << 1)

/* Magic page flags from guest to host */

#define MAGIC_PAGE_FLAG_NOT_MAPPED_NX	(1 << 0)


#endif /* _UAPI__POWERPC_KVM_PARA_H__ */

Annotation

Implementation Notes