Talos™ II Linux sources for OpenPOWER https://git.raptorcs.com/git/talos-op-linux/atom?h=v4.4.4 2012-01-21T06:09:00+00:00 2012-01-21T06:09:00+00:00 Myron Stowe mstowe@redhat.com 2012-01-21T02:13:37+00:00 urn:sha1:1001a3a307ca2425c028fd23b8ad05ad8bb048dd With the conversion of atomicio's routines in place (see commits 6f68c91c55e and 700130b41f4), atomicio.[ch] can be removed, replacing the APEI specific pre-mapping capabilities with the more generalized versions that drivers/acpi/osl.c provides. Signed-off-by: Myron Stowe <myron.stowe@redhat.com> Signed-off-by: Len Brown <len.brown@intel.com> 2010-05-19T15:40:03+00:00 Huang Ying ying.huang@intel.com 2010-05-18T06:35:11+00:00 urn:sha1:15651291a2f8c11e7e6a42d8bfde7a213ff13262 Some ACPI IO accessing need to be done in atomic context. For example, APEI ERST operations may be used for permanent storage in hardware error handler. That is, it may be called in atomic contexts such as IRQ or NMI, etc. And, ERST/EINJ implement their operations via IO memory/port accessing. But the IO memory accessing method provided by ACPI (acpi_read/acpi_write) maps the IO memory during it is accessed, so it can not be used in atomic context. To solve the issue, the IO memory should be pre-mapped during EINJ/ERST initializing. A linked list is used to record which memory area has been mapped, when memory is accessed in hardware error handler, search the linked list for the mapped virtual address from the given physical address. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>