From 6dc77fa5ac2cf26f846a51492dbe42526e26d0f2 Mon Sep 17 00:00:00 2001 From: Michael Kelley Date: Wed, 14 Jul 2021 11:34:47 -0700 Subject: Drivers: hv: Move Hyper-V misc functionality to arch-neutral code The check for whether hibernation is possible, and the enabling of Hyper-V panic notification during kexec, are both architecture neutral. Move the code from under arch/x86 and into drivers/hv/hv_common.c where it can also be used for ARM64. No functional change. Signed-off-by: Michael Kelley Link: https://lore.kernel.org/r/1626287687-2045-4-git-send-email-mikelley@microsoft.com Signed-off-by: Wei Liu --- drivers/hv/hv_common.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'drivers/hv') 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 +#include #include #include #include +#include #include #include #include @@ -70,6 +72,16 @@ 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 @@ -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 -- cgit v1.2.3