[PATCH] kdump, vmcoreinfo: Export sme_me_mask value to vmcoreinfo

Lianbo Jiang lijiang at redhat.com
Fri Oct 26 02:36:30 PDT 2018


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 at redhat.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




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