arm64: Add cpu_panic_kernel helper (17eebd1a) · Commits · 戴 / test

During the activation of a secondary CPU, we could report serious configuration issues and hence request to crash the kernel. We do this for CPU ASID bit check now. We will need it also for handling mismatched exception levels for the CPUs with VHE. Hence, add a helper to do the same for reusability. Cc: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:

Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by:

Will Deacon <will.deacon@arm.com>

arch/arm64/include/asm/smp.h

+11 −0

Original line number	Diff line number	Diff line
		@@ -113,6 +113,17 @@ static inline void update_cpu_boot_status(int val)
		dsb(ishst);
		}

		/*
		* The calling secondary CPU has detected serious configuration mismatch,
		* which calls for a kernel panic. Update the boot status and park the calling
		* CPU.
		*/
		static inline void cpu_panic_kernel(void)
		{
		update_cpu_boot_status(CPU_PANIC_KERNEL);
		cpu_park_loop();
		}

		#endif /* ifndef __ASSEMBLY__ */

		#endif /* ifndef __ASM_SMP_H */

arch/arm64/mm/context.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -75,8 +75,7 @@ void verify_cpu_asid_bits(void)
		*/
		pr_crit("CPU%d: smaller ASID size(%u) than boot CPU (%u)\n",
		smp_processor_id(), asid, asid_bits);
		update_cpu_boot_status(CPU_PANIC_KERNEL);
		cpu_park_loop();
		cpu_panic_kernel();
		}
		}

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