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From: "Guilherme G. Piccoli" <gpiccoli@igalia.com>
To: kexec@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, x86@kernel.org
Cc: bhe@redhat.com, vgoyal@redhat.com, dyoung@redhat.com,
	mpe@ellerman.id.au, npiggin@gmail.com,
	christophe.leroy@csgroup.eu, naveen@kernel.org,
	hbathini@linux.ibm.com, tglx@linutronix.de, mingo@redhat.com,
	bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com,
	ashish.kalra@amd.com, michael.roth@amd.com,
	brijesh.singh@amd.com, thomas.lendacky@amd.com,
	linux-kernel@vger.kernel.org, linux-debuggers@vger.kernel.org,
	stephen.s.brennan@oracle.com, kernel@gpiccoli.net,
	kernel-dev@igalia.com,
	"Guilherme G. Piccoli" <gpiccoli@igalia.com>
Subject: [PATCH] powerpc/fadump, x86/sev: Inform about unconditionally enabling crash_kexec_post_notifiers
Date: Fri, 30 Aug 2024 11:17:15 -0300	[thread overview]
Message-ID: <20240830141752.460173-1-gpiccoli@igalia.com> (raw)

Inspired by commit d57d6fe5bf34 ("drivers: hv: log when enabling crash_kexec_post_notifiers"),
a good idea is to signal on dmesg about unconditionally enabling the kernel
parameter crash_kexec_post_notifiers, which affects how kdump works.

By checking the source code, found 2 more cases besides Hyper-V, so let's
print that on dmesg for them as well.

Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
---
 arch/powerpc/kernel/fadump.c | 1 +
 arch/x86/virt/svm/sev.c      | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
index a612e7513a4f..37dee89a0bf2 100644
--- a/arch/powerpc/kernel/fadump.c
+++ b/arch/powerpc/kernel/fadump.c
@@ -1819,6 +1819,7 @@ int __init setup_fadump(void)
 	 * notifiers are invoked.
 	 */
 	crash_kexec_post_notifiers = true;
+	pr_info("PPC/fadump: enabling crash_kexec_post_notifiers\n");
 
 	return 1;
 }
diff --git a/arch/x86/virt/svm/sev.c b/arch/x86/virt/svm/sev.c
index 0ce17766c0e5..ac445ad2fcc8 100644
--- a/arch/x86/virt/svm/sev.c
+++ b/arch/x86/virt/svm/sev.c
@@ -257,6 +257,7 @@ static int __init snp_rmptable_init(void)
 	 * notifier is invoked to do SNP IOMMU shutdown before kdump.
 	 */
 	crash_kexec_post_notifiers = true;
+	pr_info("AMD/SEV: enabling crash_kexec_post_notifiers\n");
 
 	return 0;
 
-- 
2.46.0


             reply	other threads:[~2024-08-30 14:18 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-08-30 14:17 Guilherme G. Piccoli [this message]
2024-08-30 17:54 ` [PATCH] powerpc/fadump, x86/sev: Inform about unconditionally enabling crash_kexec_post_notifiers Stephen Brennan
2024-08-30 18:11   ` Guilherme G. Piccoli

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