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Commit 61d047be authored by Joerg Roedel's avatar Joerg Roedel
Browse files

x86: disable IOMMUs on kernel crash 



If the IOMMUs are still enabled when the kexec kernel boots access to
the disk is not possible. This is bad for tools like kdump or anything
else which wants to use PCI devices.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 09759042

arch/x86/kernel/crash.c

+6 −0
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include <asm/cpu.h>

#include <asm/reboot.h>

#include <asm/virtext.h>

#include <asm/iommu.h>





#if defined(CONFIG_SMP) && defined(CONFIG_X86_LOCAL_APIC)
@@ -103,5 +104,10 @@ void native_machine_crash_shutdown(struct pt_regs *regs) 
#ifdef CONFIG_HPET_TIMER

	hpet_disable();

#endif



#ifdef CONFIG_X86_64

	pci_iommu_shutdown();

#endif



	crash_save_cpu(regs, safe_smp_processor_id());

}