diff options
-rw-r--r-- | arch/x86/kernel/crash.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c index d84a852e4cd..c689d19e35a 100644 --- a/arch/x86/kernel/crash.c +++ b/arch/x86/kernel/crash.c @@ -26,6 +26,7 @@ #include <linux/kdebug.h> #include <asm/smp.h> #include <asm/reboot.h> +#include <asm/virtext.h> #include <mach_ipi.h> @@ -49,6 +50,15 @@ static void kdump_nmi_callback(int cpu, struct die_args *args) #endif crash_save_cpu(regs, cpu); + /* Disable VMX or SVM if needed. + * + * We need to disable virtualization on all CPUs. + * Having VMX or SVM enabled on any CPU may break rebooting + * after the kdump kernel has finished its task. + */ + cpu_emergency_vmxoff(); + cpu_emergency_svm_disable(); + disable_local_APIC(); } @@ -80,6 +90,14 @@ void native_machine_crash_shutdown(struct pt_regs *regs) local_irq_disable(); kdump_nmi_shootdown_cpus(); + + /* Booting kdump kernel with VMX or SVM enabled won't work, + * because (among other limitations) we can't disable paging + * with the virt flags. + */ + cpu_emergency_vmxoff(); + cpu_emergency_svm_disable(); + lapic_shutdown(); #if defined(CONFIG_X86_IO_APIC) disable_IO_APIC(); |