From: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
As part of the effort to separate out architecture specific code, move the
crash notification function.
Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
---
arch/x86/hyperv/hv_init.c | 26 ++++++++++++++++++++++++++
arch/x86/include/asm/mshyperv.h | 1 +
arch/x86/include/uapi/asm/hyperv.h | 8 ++++++++
drivers/hv/hyperv_vmbus.h | 10 ----------
drivers/hv/vmbus_drv.c | 25 -------------------------
5 files changed, 35 insertions(+), 35 deletions(-)
diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
index 940a970..299cafb 100644
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -208,3 +208,29 @@ u64 hv_do_hypercall(u64 control, void *input, void *output)
#endif /* !x86_64 */
}
EXPORT_SYMBOL_GPL(hv_do_hypercall);
+
+void hyperv_report_panic(struct pt_regs *regs)
+{
+ static bool panic_reported;
+
+ /*
+ * We prefer to report panic on 'die' chain as we have proper
+ * registers to report, but if we miss it (e.g. on BUG()) we need
+ * to report it on 'panic'.
+ */
+ if (panic_reported)
+ return;
+ panic_reported = true;
+
+ wrmsrl(HV_X64_MSR_CRASH_P0, regs->ip);
+ wrmsrl(HV_X64_MSR_CRASH_P1, regs->ax);
+ wrmsrl(HV_X64_MSR_CRASH_P2, regs->bx);
+ wrmsrl(HV_X64_MSR_CRASH_P3, regs->cx);
+ wrmsrl(HV_X64_MSR_CRASH_P4, regs->dx);
+
+ /*
+ * Let Hyper-V know there is crash data available
+ */
+ wrmsrl(HV_X64_MSR_CRASH_CTL, HV_CRASH_CTL_CRASH_NOTIFY);
+}
+EXPORT_SYMBOL_GPL(hyperv_report_panic);
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
index 54729e3..64e682d 100644
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -114,5 +114,6 @@ static inline __u64 generate_guest_id(__u64 d_info1, __u64 kernel_version,
#if IS_ENABLED(CONFIG_HYPERV)
void hyperv_init(void);
+void hyperv_report_panic(struct pt_regs *regs);
#endif
#endif
diff --git a/arch/x86/include/uapi/asm/hyperv.h b/arch/x86/include/uapi/asm/hyperv.h
index 9b1a918..3a20ccf 100644
--- a/arch/x86/include/uapi/asm/hyperv.h
+++ b/arch/x86/include/uapi/asm/hyperv.h
@@ -73,6 +73,9 @@
*/
#define HV_X64_MSR_STAT_PAGES_AVAILABLE (1 << 8)
+/* Crash MSR available */
+#define HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE (1 << 10)
+
/*
* Feature identification: EBX indicates which flags were specified at
* partition creation. The format is the same as the partition creation
@@ -144,6 +147,11 @@
*/
#define HV_X64_RELAXED_TIMING_RECOMMENDED (1 << 5)
+/*
+ * Crash notification flag.
+ */
+#define HV_CRASH_CTL_CRASH_NOTIFY (1ULL << 63)
+
/* MSR used to identify the guest OS. */
#define HV_X64_MSR_GUEST_OS_ID 0x40000000
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
index a7e35c8..59eb28c 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -40,16 +40,6 @@
*/
#define HV_UTIL_NEGO_TIMEOUT 55
-#define HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE 0x400
-
-#define HV_X64_MSR_CRASH_P0 0x40000100
-#define HV_X64_MSR_CRASH_P1 0x40000101
-#define HV_X64_MSR_CRASH_P2 0x40000102
-#define HV_X64_MSR_CRASH_P3 0x40000103
-#define HV_X64_MSR_CRASH_P4 0x40000104
-#define HV_X64_MSR_CRASH_CTL 0x40000105
-
-#define HV_CRASH_CTL_CRASH_NOTIFY (1ULL << 63)
/* Define version of the synthetic interrupt controller. */
#define HV_SYNIC_VERSION (1)
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 565bdd1..8e81346 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -56,31 +56,6 @@ struct vmbus_dynid {
static int hyperv_cpuhp_online;
-static void hyperv_report_panic(struct pt_regs *regs)
-{
- static bool panic_reported;
-
- /*
- * We prefer to report panic on 'die' chain as we have proper
- * registers to report, but if we miss it (e.g. on BUG()) we need
- * to report it on 'panic'.
- */
- if (panic_reported)
- return;
- panic_reported = true;
-
- wrmsrl(HV_X64_MSR_CRASH_P0, regs->ip);
- wrmsrl(HV_X64_MSR_CRASH_P1, regs->ax);
- wrmsrl(HV_X64_MSR_CRASH_P2, regs->bx);
- wrmsrl(HV_X64_MSR_CRASH_P3, regs->cx);
- wrmsrl(HV_X64_MSR_CRASH_P4, regs->dx);
-
- /*
- * Let Hyper-V know there is crash data available
- */
- wrmsrl(HV_X64_MSR_CRASH_CTL, HV_CRASH_CTL_CRASH_NOTIFY);
-}
-
static int hyperv_panic_event(struct notifier_block *nb, unsigned long val,
void *args)
{
--
1.7.4.1
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