From: "Suzuki K. Poulose" <suzuki.poulose@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: marc.zyngier@arm.com, linux-kernel@vger.kernel.org,
mark.rutland@arm.com, will.deacon@arm.com,
catalin.marinas@arm.com,
"Suzuki K. Poulose" <suzuki.poulose@arm.com>
Subject: [PATCH v2 4/6] arm64: Add hook for checking early CPU features
Date: Tue, 1 Dec 2015 15:12:09 +0000 [thread overview]
Message-ID: <1448982731-17182-5-git-send-email-suzuki.poulose@arm.com> (raw)
In-Reply-To: <1448982731-17182-1-git-send-email-suzuki.poulose@arm.com>
Adds a hook for checking whether a secondary CPU has the
features used already by the kernel during early boot, based
on the boot CPU.
Cc: Will Deacon <will.deacon@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
---
arch/arm64/kernel/cpufeature.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index dde1f56..8dd05283 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -824,6 +824,14 @@ static u64 __raw_read_system_reg(u32 sys_id)
}
/*
+ * Check for CPU features that are used in early boot
+ * based on the Boot CPU value.
+ */
+static void check_early_cpu_features(void)
+{
+}
+
+/*
* Run through the enabled system capabilities and enable() it on this CPU.
* The capabilities were decided based on the available CPUs at the boot time.
* Any new CPU should match the system wide status of the capability. If the
@@ -836,6 +844,8 @@ void verify_local_cpu_capabilities(void)
int i;
const struct arm64_cpu_capabilities *caps;
+ check_early_cpu_features();
+
/*
* If we haven't computed the system capabilities, there is nothing
* to verify.
--
1.7.9.5
next prev parent reply other threads:[~2015-12-01 15:13 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-01 15:12 [PATCH v2 0/6] arm64: cpufeature: Add sanity check for ASIDBits Suzuki K. Poulose
2015-12-01 15:12 ` [PATCH v2 1/6] arm64: Introduce kill_cpu_early Suzuki K. Poulose
2015-12-01 15:12 ` [PATCH v2 2/6] arm64: Move kill_cpu_early to smp.c Suzuki K. Poulose
2015-12-01 15:28 ` Mark Rutland
2015-12-01 16:07 ` Suzuki K. Poulose
2015-12-01 16:31 ` Mark Rutland
2015-12-01 17:38 ` Suzuki K. Poulose
2015-12-01 17:52 ` Mark Rutland
2015-12-01 18:10 ` Suzuki K. Poulose
2015-12-01 18:50 ` Mark Rutland
2015-12-03 16:36 ` Suzuki K. Poulose
2015-12-03 17:08 ` Mark Rutland
2015-12-01 15:12 ` [PATCH v2 3/6] arm64: Enable CPU capability verification for !CONFIG_HOTPLUG_CPU Suzuki K. Poulose
2015-12-01 15:12 ` Suzuki K. Poulose [this message]
2015-12-01 15:12 ` [PATCH v2 5/6] arm64: Add helper for extracting ASIDBits Suzuki K. Poulose
2015-12-01 15:12 ` [PATCH v2 6/6] arm64: Ensure the secondary CPUs have safe ASIDBits size Suzuki K. Poulose
2015-12-01 15:15 ` [PATCH v2 0/6] arm64: cpufeature: Add sanity check for ASIDBits Suzuki K. Poulose
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