linux-kernel - [PATCH] arm64: cpufeature: Enable Qualcomm erratas

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Message-Id: <20191029060432.1208859-1-bjorn.andersson@linaro.org>
Date:   Mon, 28 Oct 2019 23:04:32 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Suzuki K Poulose <suzuki.poulose@....com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, stable@...r.kernel.org,
        Mark Brown <broonie@...nel.org>
Subject: [PATCH] arm64: cpufeature: Enable Qualcomm erratas

With the introduction of 'cce360b54ce6 ("arm64: capabilities: Filter the
entries based on a given mask")' the Qualcomm erratas are no long
applied.

The result of not applying errata 1003 is that MSM8996 runs into various
RCU stalls and fails to boot most of the times.

Give both 1003 and 1009 a "type" to ensure they are not filtered out in
update_cpu_capabilities().

Fixes: cce360b54ce6 ("arm64: capabilities: Filter the entries based on a given mask")
Cc: stable@...r.kernel.org
Reported-by: Mark Brown <broonie@...nel.org>
Suggested-by: Will Deacon <will@...nel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
---
 arch/arm64/kernel/cpu_errata.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index df9465120e2f..cdd8df033536 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -780,6 +780,7 @@ const struct arm64_cpu_capabilities arm64_errata[] = {
 	{
 		.desc = "Qualcomm Technologies Falkor/Kryo erratum 1003",
 		.capability = ARM64_WORKAROUND_QCOM_FALKOR_E1003,
+		.type = ARM64_CPUCAP_SCOPE_LOCAL_CPU,
 		.matches = cpucap_multi_entry_cap_matches,
 		.match_list = qcom_erratum_1003_list,
 	},
@@ -788,6 +789,7 @@ const struct arm64_cpu_capabilities arm64_errata[] = {
 	{
 		.desc = "Qualcomm erratum 1009, ARM erratum 1286807",
 		.capability = ARM64_WORKAROUND_REPEAT_TLBI,
+		.type = ARM64_CPUCAP_SCOPE_LOCAL_CPU,
 		ERRATA_MIDR_RANGE_LIST(arm64_repeat_tlbi_cpus),
 	},
 #endif
-- 
2.23.0