Re: [PATCH v6 02/21] arm64: Allow mismatched 32-bit EL0 support
flat view
From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2021-05-21 10:42:04
Also in:
linux-arch, lkml
On Tue, May 18, 2021 at 10:47:06AM +0100, Will Deacon wrote:
quoted hunk ↗ jump to hunk
+static int enable_mismatched_32bit_el0(unsigned int cpu) +{ + struct cpuinfo_arm64 *info = &per_cpu(cpu_data, cpu); + bool cpu_32bit = id_aa64pfr0_32bit_el0(info->reg_id_aa64pfr0); + + if (cpu_32bit) { + cpumask_set_cpu(cpu, cpu_32bit_el0_mask); + static_branch_enable_cpuslocked(&arm64_mismatched_32bit_el0);
It may be worth only calling static_branch_enable_cpuslocked() if not already set, in case you try this on a system with lots of CPUs. -- Catalin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel