1 files changed, 6 insertions, 44 deletions

diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index b7ad41d7b6ee..909bf3926fd2 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -83,43 +83,6 @@ enum ipi_msg_type {
 	IPI_WAKEUP
 };
 
-#ifdef CONFIG_ARM64_VHE
-
-/* Whether the boot CPU is running in HYP mode or not*/
-static bool boot_cpu_hyp_mode;
-
-static inline void save_boot_cpu_run_el(void)
-{
-	boot_cpu_hyp_mode = is_kernel_in_hyp_mode();
-}
-
-static inline bool is_boot_cpu_in_hyp_mode(void)
-{
-	return boot_cpu_hyp_mode;
-}
-
-/*
- * Verify that a secondary CPU is running the kernel at the same
- * EL as that of the boot CPU.
- */
-void verify_cpu_run_el(void)
-{
-	bool in_el2 = is_kernel_in_hyp_mode();
-	bool boot_cpu_el2 = is_boot_cpu_in_hyp_mode();
-
-	if (in_el2 ^ boot_cpu_el2) {
-		pr_crit("CPU%d: mismatched Exception Level(EL%d) with boot CPU(EL%d)\n",
-					smp_processor_id(),
-					in_el2 ? 2 : 1,
-					boot_cpu_el2 ? 2 : 1);
-		cpu_panic_kernel();
-	}
-}
-
-#else
-static inline void save_boot_cpu_run_el(void) {}
-#endif
-
 #ifdef CONFIG_HOTPLUG_CPU
 static int op_cpu_kill(unsigned int cpu);
 #else
@@ -143,6 +106,7 @@ static int boot_secondary(unsigned int cpu, struct task_struct *idle)
 }
 
 static DECLARE_COMPLETION(cpu_running);
+bool va52mismatch __ro_after_init;
 
 int __cpu_up(unsigned int cpu, struct task_struct *idle)
 {
@@ -172,10 +136,15 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle)
 
 		if (!cpu_online(cpu)) {
 			pr_crit("CPU%u: failed to come online\n", cpu);
+
+			if (IS_ENABLED(CONFIG_ARM64_52BIT_VA) && va52mismatch)
+				pr_crit("CPU%u: does not support 52-bit VAs\n", cpu);
+
 			ret = -EIO;
 		}
 	} else {
 		pr_err("CPU%u: failed to boot: %d\n", cpu, ret);
+		return ret;
 	}
 
 	secondary_data.task = NULL;
@@ -448,13 +417,6 @@ void __init smp_prepare_boot_cpu(void)
 	 */
 	jump_label_init();
 	cpuinfo_store_boot_cpu();
-	save_boot_cpu_run_el();
-	/*
-	 * Run the errata work around checks on the boot CPU, once we have
-	 * initialised the cpu feature infrastructure from
-	 * cpuinfo_store_boot_cpu() above.
-	 */
-	update_cpu_errata_workarounds();
 }
 
 static u64 __init of_get_cpu_mpidr(struct device_node *dn)