diff options
Diffstat (limited to 'arch/x86/include/asm/kvm_para.h')
| -rw-r--r-- | arch/x86/include/asm/kvm_para.h | 148 |
1 files changed, 33 insertions, 115 deletions
diff --git a/arch/x86/include/asm/kvm_para.h b/arch/x86/include/asm/kvm_para.h index 734c3767cfa..c7678e43465 100644 --- a/arch/x86/include/asm/kvm_para.h +++ b/arch/x86/include/asm/kvm_para.h @@ -1,113 +1,33 @@ #ifndef _ASM_X86_KVM_PARA_H #define _ASM_X86_KVM_PARA_H -#include <linux/types.h> -#include <asm/hyperv.h> - -/* This CPUID returns the signature 'KVMKVMKVM' in ebx, ecx, and edx. It - * should be used to determine that a VM is running under KVM. - */ -#define KVM_CPUID_SIGNATURE 0x40000000 - -/* This CPUID returns a feature bitmap in eax. Before enabling a particular - * paravirtualization, the appropriate feature bit should be checked. - */ -#define KVM_CPUID_FEATURES 0x40000001 -#define KVM_FEATURE_CLOCKSOURCE 0 -#define KVM_FEATURE_NOP_IO_DELAY 1 -#define KVM_FEATURE_MMU_OP 2 -/* This indicates that the new set of kvmclock msrs - * are available. The use of 0x11 and 0x12 is deprecated - */ -#define KVM_FEATURE_CLOCKSOURCE2 3 -#define KVM_FEATURE_ASYNC_PF 4 -#define KVM_FEATURE_STEAL_TIME 5 - -/* The last 8 bits are used to indicate how to interpret the flags field - * in pvclock structure. If no bits are set, all flags are ignored. - */ -#define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT 24 - -#define MSR_KVM_WALL_CLOCK 0x11 -#define MSR_KVM_SYSTEM_TIME 0x12 - -#define KVM_MSR_ENABLED 1 -/* Custom MSRs falls in the range 0x4b564d00-0x4b564dff */ -#define MSR_KVM_WALL_CLOCK_NEW 0x4b564d00 -#define MSR_KVM_SYSTEM_TIME_NEW 0x4b564d01 -#define MSR_KVM_ASYNC_PF_EN 0x4b564d02 -#define MSR_KVM_STEAL_TIME 0x4b564d03 - -struct kvm_steal_time { - __u64 steal; - __u32 version; - __u32 flags; - __u32 pad[12]; -}; - -#define KVM_STEAL_ALIGNMENT_BITS 5 -#define KVM_STEAL_VALID_BITS ((-1ULL << (KVM_STEAL_ALIGNMENT_BITS + 1))) -#define KVM_STEAL_RESERVED_MASK (((1 << KVM_STEAL_ALIGNMENT_BITS) - 1 ) << 1) - -#define KVM_MAX_MMU_OP_BATCH 32 - -#define KVM_ASYNC_PF_ENABLED (1 << 0) -#define KVM_ASYNC_PF_SEND_ALWAYS (1 << 1) - -/* Operations for KVM_HC_MMU_OP */ -#define KVM_MMU_OP_WRITE_PTE 1 -#define KVM_MMU_OP_FLUSH_TLB 2 -#define KVM_MMU_OP_RELEASE_PT 3 - -/* Payload for KVM_HC_MMU_OP */ -struct kvm_mmu_op_header { - __u32 op; - __u32 pad; -}; - -struct kvm_mmu_op_write_pte { - struct kvm_mmu_op_header header; - __u64 pte_phys; - __u64 pte_val; -}; - -struct kvm_mmu_op_flush_tlb { - struct kvm_mmu_op_header header; -}; - -struct kvm_mmu_op_release_pt { - struct kvm_mmu_op_header header; - __u64 pt_phys; -}; - -#define KVM_PV_REASON_PAGE_NOT_PRESENT 1 -#define KVM_PV_REASON_PAGE_READY 2 - -struct kvm_vcpu_pv_apf_data { - __u32 reason; - __u8 pad[60]; - __u32 enabled; -}; - -#ifdef __KERNEL__ #include <asm/processor.h> +#include <uapi/asm/kvm_para.h> extern void kvmclock_init(void); extern int kvm_register_clock(char *txt); +#ifdef CONFIG_KVM_GUEST +bool kvm_check_and_clear_guest_paused(void); +#else +static inline bool kvm_check_and_clear_guest_paused(void) +{ + return false; +} +#endif /* CONFIG_KVM_GUEST */ /* This instruction is vmcall. On non-VT architectures, it will generate a * trap that we will then rewrite to the appropriate instruction. */ #define KVM_HYPERCALL ".byte 0x0f,0x01,0xc1" -/* For KVM hypercalls, a three-byte sequence of either the vmrun or the vmmrun +/* For KVM hypercalls, a three-byte sequence of either the vmcall or the vmmcall * instruction. The hypervisor may replace it with something else but only the * instructions are guaranteed to be supported. * * Up to four arguments may be passed in rbx, rcx, rdx, and rsi respectively. * The hypercall number should be placed in rax and the return value will be - * placed in rax. No other registers will be clobbered unless explicited + * placed in rax. No other registers will be clobbered unless explicitly * noted by the particular hypercall. */ @@ -165,38 +85,38 @@ static inline long kvm_hypercall4(unsigned int nr, unsigned long p1, return ret; } -static inline int kvm_para_available(void) -{ - unsigned int eax, ebx, ecx, edx; - char signature[13]; +#ifdef CONFIG_KVM_GUEST +bool kvm_para_available(void); +unsigned int kvm_arch_para_features(void); +void __init kvm_guest_init(void); +void kvm_async_pf_task_wait(u32 token); +void kvm_async_pf_task_wake(u32 token); +u32 kvm_read_and_reset_pf_reason(void); +extern void kvm_disable_steal_time(void); - cpuid(KVM_CPUID_SIGNATURE, &eax, &ebx, &ecx, &edx); - memcpy(signature + 0, &ebx, 4); - memcpy(signature + 4, &ecx, 4); - memcpy(signature + 8, &edx, 4); - signature[12] = 0; +#ifdef CONFIG_PARAVIRT_SPINLOCKS +void __init kvm_spinlock_init(void); +#else /* !CONFIG_PARAVIRT_SPINLOCKS */ +static inline void kvm_spinlock_init(void) +{ +} +#endif /* CONFIG_PARAVIRT_SPINLOCKS */ - if (strcmp(signature, "KVMKVMKVM") == 0) - return 1; +#else /* CONFIG_KVM_GUEST */ +#define kvm_guest_init() do {} while (0) +#define kvm_async_pf_task_wait(T) do {} while(0) +#define kvm_async_pf_task_wake(T) do {} while(0) +static inline bool kvm_para_available(void) +{ return 0; } static inline unsigned int kvm_arch_para_features(void) { - return cpuid_eax(KVM_CPUID_FEATURES); + return 0; } -#ifdef CONFIG_KVM_GUEST -void __init kvm_guest_init(void); -void kvm_async_pf_task_wait(u32 token); -void kvm_async_pf_task_wake(u32 token); -u32 kvm_read_and_reset_pf_reason(void); -extern void kvm_disable_steal_time(void); -#else -#define kvm_guest_init() do { } while (0) -#define kvm_async_pf_task_wait(T) do {} while(0) -#define kvm_async_pf_task_wake(T) do {} while(0) static inline u32 kvm_read_and_reset_pf_reason(void) { return 0; @@ -208,6 +128,4 @@ static inline void kvm_disable_steal_time(void) } #endif -#endif /* __KERNEL__ */ - #endif /* _ASM_X86_KVM_PARA_H */ |