Messages in this thread Patch in this message | | | Date | Fri, 02 Apr 2010 18:27:54 -0700 | From | Chris Wright <> | Subject | [PATCH 3/4] Revert "x86: disable IOMMUs on kernel crash" |
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This effectively reverts commit 61d047be99757fd9b0af900d7abce9a13a337488.
Disabling the IOMMU can potetially allow DMA transactions to complete without being translated. Leave it enabled, and allow crash kernel to do the IOMMU reinitialization properly.
Cc: Joerg Roedel <joerg.roedel@amd.com> Cc: Eric Biederman <ebiederm@xmission.com> Cc: Neil Horman <nhorman@tuxdriver.com> Cc: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Chris Wright <chrisw@sous-sol.org> --- arch/x86/kernel/crash.c | 6 ------ 1 file changed, 6 deletions(-)
--- a/arch/x86/kernel/crash.c +++ b/arch/x86/kernel/crash.c @@ -27,7 +27,6 @@ #include <asm/cpu.h> #include <asm/reboot.h> #include <asm/virtext.h> -#include <asm/x86_init.h> #if defined(CONFIG_SMP) && defined(CONFIG_X86_LOCAL_APIC) @@ -103,10 +102,5 @@ void native_machine_crash_shutdown(struc #ifdef CONFIG_HPET_TIMER hpet_disable(); #endif - -#ifdef CONFIG_X86_64 - x86_platform.iommu_shutdown(); -#endif - crash_save_cpu(regs, safe_smp_processor_id()); }
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