diff options
Diffstat (limited to 'arch/ia64/hp/common/sba_iommu.c')
| -rw-r--r-- | arch/ia64/hp/common/sba_iommu.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/arch/ia64/hp/common/sba_iommu.c b/arch/ia64/hp/common/sba_iommu.c index c1dca226b479..cd4adf52f174 100644 --- a/arch/ia64/hp/common/sba_iommu.c +++ b/arch/ia64/hp/common/sba_iommu.c @@ -34,6 +34,7 @@ #include <linux/efi.h> #include <linux/nodemask.h> #include <linux/bitops.h> /* hweight64() */ +#include <linux/crash_dump.h> #include <asm/delay.h> /* ia64_get_itc() */ #include <asm/io.h> @@ -43,6 +44,8 @@ #include <asm/acpi-ext.h> +extern int swiotlb_late_init_with_default_size (size_t size); + #define PFX "IOC: " /* @@ -2026,11 +2029,24 @@ sba_init(void) if (!ia64_platform_is("hpzx1") && !ia64_platform_is("hpzx1_swiotlb")) return 0; +#if defined(CONFIG_IA64_GENERIC) && defined(CONFIG_CRASH_DUMP) + /* If we are booting a kdump kernel, the sba_iommu will + * cause devices that were not shutdown properly to MCA + * as soon as they are turned back on. Our only option for + * a successful kdump kernel boot is to use the swiotlb. + */ + if (elfcorehdr_addr < ELFCORE_ADDR_MAX) { + if (swiotlb_late_init_with_default_size(64 * (1<<20)) != 0) + panic("Unable to initialize software I/O TLB:" + " Try machvec=dig boot option"); + machvec_init("dig"); + return 0; + } +#endif + acpi_bus_register_driver(&acpi_sba_ioc_driver); if (!ioc_list) { #ifdef CONFIG_IA64_GENERIC - extern int swiotlb_late_init_with_default_size (size_t size); - /* * If we didn't find something sba_iommu can claim, we * need to setup the swiotlb and switch to the dig machvec. |