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acpi: apei: handle SEA notification type for ARMv8

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ARM APEI extension proposal added SEA (Synchronous External Abort)
notification type for ARMv8.
Add a new GHES error source handling function for SEA. If an error
source's notification type is SEA, then this function can be registered
into the SEA exception handler. That way GHES will parse and report
SEA exceptions when they occur.
An SEA can interrupt code that had interrupts masked and is treated as
an NMI. To aid this the page of address space for mapping APEI buffers
while in_nmi() is always reserved, and ghes_ioremap_pfn_nmi() is
changed to use the helper methods to find the prot_t to map with in
the same way as ghes_ioremap_pfn_irq().

Signed-off-by: Tyler Baicar <[email protected]>
CC: Jonathan (Zhixiong) Zhang <[email protected]>
Reviewed-by: James Morse <[email protected]>
Acked-by: Catalin Marinas <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
This commit is contained in:
Tyler Baicar 2017-06-21 12:17:09 -06:00 • committed by Will Deacon
commit 7edda0886b
5 changed files with 105 additions and 6 deletions
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7
include/acpi/ghes.h
View file

@ -1,3 +1,6 @@
#ifndef GHES_H
#define GHES_H
#include <acpi/apei.h>
#include <acpi/hed.h>
@ -109,3 +112,7 @@ static inline void *acpi_hest_get_next(struct acpi_hest_generic_data *gdata)
{
return (void *)(gdata) + acpi_hest_get_record_size(gdata);
}
void ghes_notify_sea(void);
#endif /* GHES_H */