diff options
Diffstat (limited to 'drivers/hv/hv_common.c')
| -rw-r--r-- | drivers/hv/hv_common.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/hv/hv_common.c b/drivers/hv/hv_common.c index fe333f410d1d..46658de78050 100644 --- a/drivers/hv/hv_common.c +++ b/drivers/hv/hv_common.c @@ -13,9 +13,11 @@ */ #include <linux/types.h> +#include <linux/acpi.h> #include <linux/export.h> #include <linux/bitfield.h> #include <linux/cpumask.h> +#include <linux/panic_notifier.h> #include <linux/ptrace.h> #include <linux/slab.h> #include <asm/hyperv-tlfs.h> @@ -71,6 +73,16 @@ int __init hv_common_init(void) int i; /* + * Hyper-V expects to get crash register data or kmsg when + * crash enlightment is available and system crashes. Set + * crash_kexec_post_notifiers to be true to make sure that + * calling crash enlightment interface before running kdump + * kernel. + */ + if (ms_hyperv.misc_features & HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE) + crash_kexec_post_notifiers = true; + + /* * Allocate the per-CPU state for the hypercall input arg. * If this allocation fails, we will not be able to setup * (per-CPU) hypercall input page and thus this failure is @@ -204,6 +216,12 @@ bool hv_query_ext_cap(u64 cap_query) } EXPORT_SYMBOL_GPL(hv_query_ext_cap); +bool hv_is_hibernation_supported(void) +{ + return !hv_root_partition && acpi_sleep_state_supported(ACPI_STATE_S4); +} +EXPORT_SYMBOL_GPL(hv_is_hibernation_supported); + /* These __weak functions provide default "no-op" behavior and * may be overridden by architecture specific versions. Architectures * for which the default "no-op" behavior is sufficient can leave |