diff options
| -rw-r--r-- | arch/x86/include/asm/hyperv-tlfs.h | 57 | ||||
| -rw-r--r-- | arch/x86/include/asm/mshyperv.h | 78 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/mshyperv.c | 15 |
3 files changed, 66 insertions, 84 deletions
diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h index 77d6e8b10ea9..a9d6738d2071 100644 --- a/arch/x86/include/asm/hyperv-tlfs.h +++ b/arch/x86/include/asm/hyperv-tlfs.h @@ -244,6 +244,55 @@ #define HV_X64_MSR_CRASH_PARAMS \ (1 + (HV_X64_MSR_CRASH_P4 - HV_X64_MSR_CRASH_P0)) +/* + * Declare the MSR used to setup pages used to communicate with the hypervisor. + */ +union hv_x64_msr_hypercall_contents { + u64 as_uint64; + struct { + u64 enable:1; + u64 reserved:11; + u64 guest_physical_address:52; + }; +}; + +/* + * TSC page layout. + */ +struct ms_hyperv_tsc_page { + volatile u32 tsc_sequence; + u32 reserved1; + volatile u64 tsc_scale; + volatile s64 tsc_offset; + u64 reserved2[509]; +}; + +/* + * The guest OS needs to register the guest ID with the hypervisor. + * The guest ID is a 64 bit entity and the structure of this ID is + * specified in the Hyper-V specification: + * + * msdn.microsoft.com/en-us/library/windows/hardware/ff542653%28v=vs.85%29.aspx + * + * While the current guideline does not specify how Linux guest ID(s) + * need to be generated, our plan is to publish the guidelines for + * Linux and other guest operating systems that currently are hosted + * on Hyper-V. The implementation here conforms to this yet + * unpublished guidelines. + * + * + * Bit(s) + * 63 - Indicates if the OS is Open Source or not; 1 is Open Source + * 62:56 - Os Type; Linux is 0x100 + * 55:48 - Distro specific identification + * 47:16 - Linux kernel version number + * 15:0 - Distro specific identification + * + * + */ + +#define HV_LINUX_VENDOR_ID 0x8100 + /* TSC emulation after migration */ #define HV_X64_MSR_REENLIGHTENMENT_CONTROL 0x40000106 @@ -305,6 +354,14 @@ enum HV_GENERIC_SET_FORMAT { HV_GENERIC_SET_ALL, }; +#define HV_HYPERCALL_RESULT_MASK GENMASK_ULL(15, 0) +#define HV_HYPERCALL_FAST_BIT BIT(16) +#define HV_HYPERCALL_VARHEAD_OFFSET 17 +#define HV_HYPERCALL_REP_COMP_OFFSET 32 +#define HV_HYPERCALL_REP_COMP_MASK GENMASK_ULL(43, 32) +#define HV_HYPERCALL_REP_START_OFFSET 48 +#define HV_HYPERCALL_REP_START_MASK GENMASK_ULL(59, 48) + /* hypercall status code */ #define HV_STATUS_SUCCESS 0 #define HV_STATUS_INVALID_HYPERCALL_CODE 2 diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index 044323a59354..38cfbe9a5794 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -9,25 +9,6 @@ #include <asm/hyperv-tlfs.h> #include <asm/nospec-branch.h> -/* - * The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent - * is set by CPUID(HVCPUID_VERSION_FEATURES). - */ -enum hv_cpuid_function { - HVCPUID_VERSION_FEATURES = 0x00000001, - HVCPUID_VENDOR_MAXFUNCTION = 0x40000000, - HVCPUID_INTERFACE = 0x40000001, - - /* - * The remaining functions depend on the value of - * HVCPUID_INTERFACE - */ - HVCPUID_VERSION = 0x40000002, - HVCPUID_FEATURES = 0x40000003, - HVCPUID_ENLIGHTENMENT_INFO = 0x40000004, - HVCPUID_IMPLEMENTATION_LIMITS = 0x40000005, -}; - struct ms_hyperv_info { u32 features; u32 misc_features; @@ -38,58 +19,9 @@ struct ms_hyperv_info { extern struct ms_hyperv_info ms_hyperv; -/* - * Declare the MSR used to setup pages used to communicate with the hypervisor. - */ -union hv_x64_msr_hypercall_contents { - u64 as_uint64; - struct { - u64 enable:1; - u64 reserved:11; - u64 guest_physical_address:52; - }; -}; - -/* - * TSC page layout. - */ - -struct ms_hyperv_tsc_page { - volatile u32 tsc_sequence; - u32 reserved1; - volatile u64 tsc_scale; - volatile s64 tsc_offset; - u64 reserved2[509]; -}; /* - * The guest OS needs to register the guest ID with the hypervisor. - * The guest ID is a 64 bit entity and the structure of this ID is - * specified in the Hyper-V specification: - * - * msdn.microsoft.com/en-us/library/windows/hardware/ff542653%28v=vs.85%29.aspx - * - * While the current guideline does not specify how Linux guest ID(s) - * need to be generated, our plan is to publish the guidelines for - * Linux and other guest operating systems that currently are hosted - * on Hyper-V. The implementation here conforms to this yet - * unpublished guidelines. - * - * - * Bit(s) - * 63 - Indicates if the OS is Open Source or not; 1 is Open Source - * 62:56 - Os Type; Linux is 0x100 - * 55:48 - Distro specific identification - * 47:16 - Linux kernel version number - * 15:0 - Distro specific identification - * - * - */ - -#define HV_LINUX_VENDOR_ID 0x8100 - -/* - * Generate the guest ID based on the guideline described above. + * Generate the guest ID. */ static inline __u64 generate_guest_id(__u64 d_info1, __u64 kernel_version, @@ -215,14 +147,6 @@ static inline u64 hv_do_hypercall(u64 control, void *input, void *output) return hv_status; } -#define HV_HYPERCALL_RESULT_MASK GENMASK_ULL(15, 0) -#define HV_HYPERCALL_FAST_BIT BIT(16) -#define HV_HYPERCALL_VARHEAD_OFFSET 17 -#define HV_HYPERCALL_REP_COMP_OFFSET 32 -#define HV_HYPERCALL_REP_COMP_MASK GENMASK_ULL(43, 32) -#define HV_HYPERCALL_REP_START_OFFSET 48 -#define HV_HYPERCALL_REP_START_MASK GENMASK_ULL(59, 48) - /* Fast hypercall with 8 bytes of input and no output */ static inline u64 hv_do_fast_hypercall8(u16 code, u64 input1) { diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index 04f760432a17..0dfc568c110c 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -180,8 +180,8 @@ static void __init ms_hyperv_init_platform(void) pr_info("Hyper-V: features 0x%x, hints 0x%x\n", ms_hyperv.features, ms_hyperv.hints); - ms_hyperv.max_vp_index = cpuid_eax(HVCPUID_IMPLEMENTATION_LIMITS); - ms_hyperv.max_lp_index = cpuid_ebx(HVCPUID_IMPLEMENTATION_LIMITS); + ms_hyperv.max_vp_index = cpuid_eax(HYPERV_CPUID_IMPLEMENT_LIMITS); + ms_hyperv.max_lp_index = cpuid_ebx(HYPERV_CPUID_IMPLEMENT_LIMITS); pr_debug("Hyper-V: max %u virtual processors, %u logical processors\n", ms_hyperv.max_vp_index, ms_hyperv.max_lp_index); @@ -189,11 +189,12 @@ static void __init ms_hyperv_init_platform(void) /* * Extract host information. */ - if (cpuid_eax(HVCPUID_VENDOR_MAXFUNCTION) >= HVCPUID_VERSION) { - hv_host_info_eax = cpuid_eax(HVCPUID_VERSION); - hv_host_info_ebx = cpuid_ebx(HVCPUID_VERSION); - hv_host_info_ecx = cpuid_ecx(HVCPUID_VERSION); - hv_host_info_edx = cpuid_edx(HVCPUID_VERSION); + if (cpuid_eax(HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS) >= + HYPERV_CPUID_VERSION) { + hv_host_info_eax = cpuid_eax(HYPERV_CPUID_VERSION); + hv_host_info_ebx = cpuid_ebx(HYPERV_CPUID_VERSION); + hv_host_info_ecx = cpuid_ecx(HYPERV_CPUID_VERSION); + hv_host_info_edx = cpuid_edx(HYPERV_CPUID_VERSION); pr_info("Hyper-V Host Build:%d-%d.%d-%d-%d.%d\n", hv_host_info_eax, hv_host_info_ebx >> 16, |