arm64: hibernate: Refuse to hibernate if the boot cpu is offline

[firefly-linux-kernel-4.4.55.git] / arch / arm64 / kernel / cpufeature.c

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 0669c63281ea01a93ef9794f9731b424b6afd28e..ab68e7c9808d1c6e7168f38749f39e543b759394 100644 (file)
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -26,6 +26,7 @@
 #include <asm/cpu_ops.h>
 #include <asm/processor.h>
 #include <asm/sysreg.h>
+#include <asm/virt.h>
 
 unsigned long elf_hwcap __read_mostly;
 EXPORT_SYMBOL_GPL(elf_hwcap);
@@ -621,6 +622,11 @@ static bool has_useable_gicv3_cpuif(const struct arm64_cpu_capabilities *entry)
        return has_sre;
 }
 
+static bool runs_at_el2(const struct arm64_cpu_capabilities *entry)
+{
+       return is_kernel_in_hyp_mode();
+}
+
 static const struct arm64_cpu_capabilities arm64_features[] = {
        {
                .desc = "GIC system register CPU interface",
@@ -651,6 +657,11 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
                .min_field_value = 2,
        },
 #endif /* CONFIG_AS_LSE && CONFIG_ARM64_LSE_ATOMICS */
+       {
+               .desc = "Virtualization Host Extensions",
+               .capability = ARM64_HAS_VIRT_HOST_EXTN,
+               .matches = runs_at_el2,
+       },
        {},
 };