linux-kernel - [PATCH] kdump, vmcoreinfo: Export sme_me

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Date:   Fri, 26 Oct 2018 17:36:30 +0800
From:   Lianbo Jiang <lijiang@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     kexec@...ts.infradead.org, tglx@...utronix.de, mingo@...hat.com,
        bp@...en8.de, x86@...nel.org, bhe@...hat.com, dyoung@...hat.com
Subject: [PATCH] kdump, vmcoreinfo: Export sme_me_mask value to vmcoreinfo

For AMD machine with SME feature, makedumpfile tools need to know
whether the crash kernel was encrypted or not. So it is necessary
to write the sme_me_mask to vmcoreinfo.

Signed-off-by: Lianbo Jiang <lijiang@...hat.com>
---
 arch/x86/kernel/machine_kexec_64.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
index 4c8acdfdc5a7..dcfdb64d1097 100644
--- a/arch/x86/kernel/machine_kexec_64.c
+++ b/arch/x86/kernel/machine_kexec_64.c
@@ -357,6 +357,8 @@ void arch_crash_save_vmcoreinfo(void)
 	vmcoreinfo_append_str("NUMBER(pgtable_l5_enabled)=%d\n",
 			pgtable_l5_enabled());
 
+	VMCOREINFO_NUMBER(sme_me_mask);
+
 #ifdef CONFIG_NUMA
 	VMCOREINFO_SYMBOL(node_data);
 	VMCOREINFO_LENGTH(node_data, MAX_NUMNODES);
-- 
2.17.1