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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: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2009-06-09 17:56:09 +02:00
parent 0975904276
commit 61d047be99
1 changed files with 6 additions and 0 deletions
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6
arch/x86/kernel/crash.c
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@ -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());
}