diff options
Diffstat (limited to 'arch/x86/hyperv/hv_init.c')
| -rw-r--r-- | arch/x86/hyperv/hv_init.c | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c index 1ff420217298..20c876c7c5bf 100644 --- a/arch/x86/hyperv/hv_init.c +++ b/arch/x86/hyperv/hv_init.c @@ -333,7 +333,7 @@ void __init hyperv_init(void) * Register Hyper-V specific clocksource. */ #ifdef CONFIG_HYPERV_TSCPAGE - if (ms_hyperv.features & HV_X64_MSR_REFERENCE_TSC_AVAILABLE) { + if (ms_hyperv.features & HV_MSR_REFERENCE_TSC_AVAILABLE) { union hv_x64_msr_hypercall_contents tsc_msr; tsc_pg = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL); @@ -362,7 +362,7 @@ register_msr_cs: */ hyperv_cs = &hyperv_cs_msr; - if (ms_hyperv.features & HV_X64_MSR_TIME_REF_COUNT_AVAILABLE) + if (ms_hyperv.features & HV_MSR_TIME_REF_COUNT_AVAILABLE) clocksource_register_hz(&hyperv_cs_msr, NSEC_PER_SEC/100); return; @@ -426,6 +426,33 @@ void hyperv_report_panic(struct pt_regs *regs, long err) } EXPORT_SYMBOL_GPL(hyperv_report_panic); +/** + * hyperv_report_panic_msg - report panic message to Hyper-V + * @pa: physical address of the panic page containing the message + * @size: size of the message in the page + */ +void hyperv_report_panic_msg(phys_addr_t pa, size_t size) +{ + /* + * P3 to contain the physical address of the panic page & P4 to + * contain the size of the panic data in that page. Rest of the + * registers are no-op when the NOTIFY_MSG flag is set. + */ + wrmsrl(HV_X64_MSR_CRASH_P0, 0); + wrmsrl(HV_X64_MSR_CRASH_P1, 0); + wrmsrl(HV_X64_MSR_CRASH_P2, 0); + wrmsrl(HV_X64_MSR_CRASH_P3, pa); + wrmsrl(HV_X64_MSR_CRASH_P4, size); + + /* + * Let Hyper-V know there is crash data available along with + * the panic message. + */ + wrmsrl(HV_X64_MSR_CRASH_CTL, + (HV_CRASH_CTL_CRASH_NOTIFY | HV_CRASH_CTL_CRASH_NOTIFY_MSG)); +} +EXPORT_SYMBOL_GPL(hyperv_report_panic_msg); + bool hv_is_hyperv_initialized(void) { union hv_x64_msr_hypercall_contents hypercall_msr; |