arm64: set all the CPU as present for dtb booting with 'CONFIG_ACPI' enabled

hulk inclusion
category: bugfix
bugzilla: 20799
CVE: NA
---------------------------

The following patch didn't consider the situation when we boot the
system using device tree but 'CONFIG_ACPI' is enabled. In this
situation, we also need to set all the CPU as present CPU.

Fixes: 280637f70ab5 ("arm64: mark all the GICC nodes in MADT as possible cpu")
Signed-off-by: NXiongfeng Wang <wangxiongfeng2@huawei.com>
Reviewed-by: NYang Yingliang <yangyingliang@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

arch/arm64/kernel/smp.c

@@ -762,8 +762,12 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
 		if (err)
 			continue;
 #ifdef CONFIG_ACPI
-		if ((cpu_madt_gicc[cpu].flags & ACPI_MADT_ENABLED))
+		if (!acpi_disabled) {
+			if ((cpu_madt_gicc[cpu].flags & ACPI_MADT_ENABLED))
+				set_cpu_present(cpu, true);
+		} else {
 			set_cpu_present(cpu, true);
+		}
 #else
 		set_cpu_present(cpu, true);
 #endif