From 6330b3511142934199dfbd9d273e2c5a13c59a23 Mon Sep 17 00:00:00 2001
From: Xie XiuQi <xiexiuqi@huawei.com>
Date: Tue, 29 Jan 2019 17:38:33 +0800
Subject: [PATCH] arm64/mpam: print mpam caps info when booting

hulk inclusion
category: feature
bugzilla: 5510
CVE: NA

Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
 arch/arm64/kernel/mpam.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/mpam.c b/arch/arm64/kernel/mpam.c
index b83fd581fca7..4261c64f2a12 100644
--- a/arch/arm64/kernel/mpam.c
+++ b/arch/arm64/kernel/mpam.c
@@ -406,8 +406,10 @@ static __init bool get_rdt_mon_resources(void)
 
 static __init bool get_resctrl_resources(void)
 {
-	if (!cpus_have_const_cap(ARM64_HAS_MPAM))
+	if (!cpus_have_const_cap(ARM64_HAS_MPAM)) {
+		pr_info("This cpu don't support MPAM feature: pfr0: %016llx\n", read_sysreg_s(SYS_ID_AA64PFR0_EL1));
 		return false;
+	}
 
 	rdt_alloc_capable = get_rdt_alloc_resources();
 	rdt_mon_capable = get_rdt_mon_resources();
-- 
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