linux-kernel - [PATCH v1] x86/hyperv: Move hv crash init after hypercall pg setup

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Message-ID: <20260204015800.40843-1-mrathor@linux.microsoft.com>
Date: Tue,  3 Feb 2026 17:58:00 -0800
From: Mukesh R <mrathor@...ux.microsoft.com>
To: linux-hyperv@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: wei.liu@...nel.org
Subject: [PATCH v1] x86/hyperv: Move hv crash init after hypercall pg setup

hv_root_crash_init() is not setting up the hypervisor crash collection
for baremetal cases because when it's called, hypervisor page is not
setup. This got missed due to internal mirror falling behind.

Fix is simple, just move the crash init call after the hypercall
page setup.

Signed-off-by: Mukesh Rathor <mrathor@...ux.microsoft.com>
---
 arch/x86/hyperv/hv_init.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
index 14de43f4bc6c..7f3301bd081e 100644
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -558,7 +558,6 @@ void __init hyperv_init(void)
 		memunmap(src);
 
 		hv_remap_tsc_clocksource();
-		hv_root_crash_init();
 		hv_sleep_notifiers_register();
 	} else {
 		hypercall_msr.guest_physical_address = vmalloc_to_pfn(hv_hypercall_pg);
@@ -567,6 +566,9 @@ void __init hyperv_init(void)
 
 	hv_set_hypercall_pg(hv_hypercall_pg);
 
+	if (hv_root_partition())        /* after set hypercall pg */
+		hv_root_crash_init();
+
 skip_hypercall_pg_init:
 	/*
 	 * hyperv_init() is called before LAPIC is initialized: see
-- 
2.51.2.vfs.0.1