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Message-ID: <1245142575-7166-3-git-send-email-joerg.roedel@amd.com> Date: Tue, 16 Jun 2009 10:56:11 +0200 From: Joerg Roedel <joerg.roedel@....com> To: Ingo Molnar <mingo@...e.hu> CC: iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org, Chris Wright <chrisw@...s-sol.org>, Joerg Roedel <joerg.roedel@....com> Subject: [PATCH 2/6] 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@....com> --- arch/x86/kernel/crash.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c index ff95824..5e409dc 100644 --- a/arch/x86/kernel/crash.c +++ b/arch/x86/kernel/crash.c @@ -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()); } -- 1.6.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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