From: "Suzuki K. Poulose" <suzuki.poulose@arm.com> To: linux-arm-kernel@lists.infradead.org Cc: Catalin.Marinas@arm.com, Will.Deacon@arm.com, Mark.Rutland@arm.com, edward.nevill@linaro.org, aph@redhat.com, linux-kernel@vger.kernel.org, andre.przywara@arm.com, ard.biesheuvel@linaro.org, dave.martin@arm.com, marc.zyngier@arm.com, "Suzuki K. Poulose" <suzuki.poulose@arm.com> Subject: [PATCH 11/22] arm64: Populate cpuinfo after notify_cpu_starting Date: Wed, 16 Sep 2015 15:21:09 +0100 [thread overview] Message-ID: <1442413280-31885-12-git-send-email-suzuki.poulose@arm.com> (raw) In-Reply-To: <1442413280-31885-1-git-send-email-suzuki.poulose@arm.com> From: "Suzuki K. Poulose" <suzuki.poulose@arm.com> This patch delays populating the cpuinfo for a new (hotplugged) CPU until the notifiers have executed. This will enable us to verify if the new (hotplugged) CPU has all the capabilities which the system already has. If it doesn't, we could prevent it from turning online and also modifying the system wide feature register status. Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com> --- arch/arm64/kernel/smp.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index cb3e0d8..6987de4 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -163,14 +163,14 @@ asmlinkage void secondary_start_kernel(void) cpu_ops[cpu]->cpu_postboot(); /* - * Log the CPU info before it is marked online and might get read. + * Enable GIC and timers. */ - cpuinfo_store_cpu(); + notify_cpu_starting(cpu); /* - * Enable GIC and timers. + * Log the CPU info before it is marked online and might get read. */ - notify_cpu_starting(cpu); + cpuinfo_store_cpu(); smp_store_cpu_info(cpu); -- 1.7.9.5
WARNING: multiple messages have this Message-ID (diff)
From: suzuki.poulose@arm.com (Suzuki K. Poulose) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 11/22] arm64: Populate cpuinfo after notify_cpu_starting Date: Wed, 16 Sep 2015 15:21:09 +0100 [thread overview] Message-ID: <1442413280-31885-12-git-send-email-suzuki.poulose@arm.com> (raw) In-Reply-To: <1442413280-31885-1-git-send-email-suzuki.poulose@arm.com> From: "Suzuki K. Poulose" <suzuki.poulose@arm.com> This patch delays populating the cpuinfo for a new (hotplugged) CPU until the notifiers have executed. This will enable us to verify if the new (hotplugged) CPU has all the capabilities which the system already has. If it doesn't, we could prevent it from turning online and also modifying the system wide feature register status. Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com> --- arch/arm64/kernel/smp.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index cb3e0d8..6987de4 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -163,14 +163,14 @@ asmlinkage void secondary_start_kernel(void) cpu_ops[cpu]->cpu_postboot(); /* - * Log the CPU info before it is marked online and might get read. + * Enable GIC and timers. */ - cpuinfo_store_cpu(); + notify_cpu_starting(cpu); /* - * Enable GIC and timers. + * Log the CPU info before it is marked online and might get read. */ - notify_cpu_starting(cpu); + cpuinfo_store_cpu(); smp_store_cpu_info(cpu); -- 1.7.9.5
next prev parent reply other threads:[~2015-09-16 14:26 UTC|newest] Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-09-16 14:20 [PATCH 00/22] arm64: Consolidate CPU feature handling Suzuki K. Poulose 2015-09-16 14:20 ` Suzuki K. Poulose 2015-09-16 14:20 ` [PATCH 01/22] arm64: Make the CPU information more clear Suzuki K. Poulose 2015-09-16 14:20 ` Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 02/22] arm64: Delay ELF HWCAP initialisation until all CPUs are up Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 03/22] arm64: Move cpu feature detection code Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 04/22] arm64: Move mixed endian support detection Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 05/22] arm64: Move /proc/cpuinfo handling code Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 06/22] arm64: sys_reg: Define System register encoding Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 07/22] arm64: Keep track of CPU feature registers Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-25 11:38 ` Dave Martin 2015-09-25 11:38 ` Dave Martin 2015-09-25 13:05 ` Suzuki K. Poulose 2015-09-25 13:05 ` Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 08/22] arm64: Consolidate CPU Sanity check to CPU Feature infrastructure Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 09/22] arm64: Read system wide CPUID value Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 10/22] arm64: Cleanup mixed endian support detection Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose [this message] 2015-09-16 14:21 ` [PATCH 11/22] arm64: Populate cpuinfo after notify_cpu_starting Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 12/22] arm64: Delay cpu feature checks Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 13/22] arm64: Make use of system wide capability checks Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 14/22] arm64: Cleanup HWCAP handling Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 15/22] arm64: Move FP/ASIMD hwcap handling to common code Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 16/22] arm64/debug: Make use of the system wide safe value Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-29 12:17 ` Vladimir Murzin 2015-09-29 12:17 ` Vladimir Murzin 2015-09-29 12:46 ` Suzuki K. Poulose 2015-09-29 12:46 ` Suzuki K. Poulose 2015-09-30 16:13 ` Suzuki K. Poulose 2015-09-30 16:13 ` Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 17/22] arm64/kvm: Make use of the system wide safe values Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 18/22] arm64: Add helper to decode register from instruction Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 19/22] arm64: cpufeature: Track the user visible fields Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 20/22] arm64: Expose feature registers by emulating MRS Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 21/22] arm64: cpuinfo: Expose MIDR_EL1 and REVIDR_EL1 to sysfs Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-16 14:21 ` [PATCH 22/22] arm64: feature registers: Documentation Suzuki K. Poulose 2015-09-16 14:21 ` Suzuki K. Poulose 2015-09-18 9:23 ` [PATCH 00/22] arm64: Consolidate CPU feature handling Suzuki K. Poulose 2015-09-18 9:23 ` Suzuki K. Poulose 2015-09-22 15:19 ` James Morse 2015-09-22 15:19 ` James Morse 2015-09-22 15:21 ` Suzuki K. Poulose 2015-09-22 15:21 ` Suzuki K. Poulose 2015-09-23 15:56 ` Dave Martin 2015-09-23 15:56 ` Dave Martin 2015-09-23 15:58 ` Suzuki K. Poulose 2015-09-23 15:58 ` Suzuki K. Poulose 2015-09-23 16:37 ` Suzuki K. Poulose 2015-09-23 16:37 ` Suzuki K. Poulose 2015-09-23 17:08 ` Dave P Martin 2015-09-23 17:08 ` Dave P Martin
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