From: Michael Kelley <mikelley@microsoft.com>
To: sthemmin@microsoft.com, kys@microsoft.com, wei.liu@kernel.org,
decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com,
bp@alien8.de, x86@kernel.org, hpa@zytor.com, arnd@arndb.de,
linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org
Cc: mikelley@microsoft.com, linux-arch@vger.kernel.org
Subject: [PATCH 3/3] Drivers: hv: Move Hyper-V misc functionality to arch-neutral code
Date: Sun, 11 Jul 2021 20:25:16 -0700 [thread overview]
Message-ID: <1626060316-2398-4-git-send-email-mikelley@microsoft.com> (raw)
In-Reply-To: <1626060316-2398-1-git-send-email-mikelley@microsoft.com>
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 <mikelley@microsoft.com>
---
arch/x86/hyperv/hv_init.c | 8 +-------
arch/x86/kernel/cpu/mshyperv.c | 11 -----------
drivers/hv/hv_common.c | 18 ++++++++++++++++++
3 files changed, 19 insertions(+), 18 deletions(-)
diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
index e87a029..6f247e7 100644
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -7,10 +7,10 @@
* Author : K. Y. Srinivasan <kys@microsoft.com>
*/
-#include <linux/acpi.h>
#include <linux/efi.h>
#include <linux/types.h>
#include <linux/bitfield.h>
+#include <linux/io.h>
#include <asm/apic.h>
#include <asm/desc.h>
#include <asm/hypervisor.h>
@@ -523,12 +523,6 @@ bool hv_is_hyperv_initialized(void)
}
EXPORT_SYMBOL_GPL(hv_is_hyperv_initialized);
-bool hv_is_hibernation_supported(void)
-{
- return !hv_root_partition && acpi_sleep_state_supported(ACPI_STATE_S4);
-}
-EXPORT_SYMBOL_GPL(hv_is_hibernation_supported);
-
enum hv_isolation_type hv_get_isolation_type(void)
{
if (!(ms_hyperv.priv_high & HV_ISOLATION))
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index 3e5a3f5..ec428e2 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -17,7 +17,6 @@
#include <linux/irq.h>
#include <linux/kexec.h>
#include <linux/i8253.h>
-#include <linux/panic_notifier.h>
#include <linux/random.h>
#include <asm/processor.h>
#include <asm/hypervisor.h>
@@ -322,16 +321,6 @@ static void __init ms_hyperv_init_platform(void)
ms_hyperv.nested_features);
}
- /*
- * 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;
-
#ifdef CONFIG_X86_LOCAL_APIC
if (ms_hyperv.features & HV_ACCESS_FREQUENCY_MSRS &&
ms_hyperv.misc_features & HV_FEATURE_FREQUENCY_MSRS_AVAILABLE) {
diff --git a/drivers/hv/hv_common.c b/drivers/hv/hv_common.c
index c429306..3ff8446 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>
@@ -64,6 +66,16 @@ 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
@@ -197,6 +209,12 @@ 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
--
1.8.3.1
next prev parent reply other threads:[~2021-07-12 3:26 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-12 3:25 [PATCH 0/3] Additional refactoring of Hyper-V arch specific code Michael Kelley
2021-07-12 3:25 ` [PATCH 1/3] Drivers: hv: Make portions of Hyper-V init code be arch neutral Michael Kelley
2021-07-12 18:24 ` Wei Liu
2021-07-12 18:40 ` Wei Liu
2021-07-12 18:41 ` Michael Kelley
2021-07-12 18:51 ` Wei Liu
2021-07-12 3:25 ` [PATCH 2/3] Drivers: hv: Add arch independent default functions for some Hyper-V handlers Michael Kelley
2021-07-12 3:25 ` Michael Kelley [this message]
2021-07-14 9:37 ` [PATCH 0/3] Additional refactoring of Hyper-V arch specific code Wei Liu
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