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ACPI / APEI: Use separate fixmap pages for arm64 NMI-like notifications

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Now that ghes notification helpers provide the fixmap slots and
take the lock themselves, multiple NMI-like notifications can
be used on arm64.

These should be named after their notification method as they can't
all be called 'NMI'. x86's NOTIFY_NMI already is, change the SEA
fixmap entry to be called FIX_APEI_GHES_SEA.

Future patches can add support for FIX_APEI_GHES_SEI and
FIX_APEI_GHES_SDEI_{NORMAL,CRITICAL}.

Because all of ghes.c builds on both architectures, provide a
constant for each fixmap entry that the architecture will never
use.

Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
James Morse 2019-01-29 18:48:57 +00:00 committed by Rafael J. Wysocki
parent d9f608dc15
commit b972d2eaf0
2 changed files with 2 additions and 2 deletions
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2
arch/arm64/include/asm/fixmap.h
View file

@ -55,7 +55,7 @@ enum fixed_addresses {
#ifdef CONFIG_ACPI_APEI_GHES
/* Used for GHES mapping from assorted contexts */
FIX_APEI_GHES_IRQ,
FIX_APEI_GHES_NMI,
FIX_APEI_GHES_SEA,
#endif /* CONFIG_ACPI_APEI_GHES */
#ifdef CONFIG_UNMAP_KERNEL_AT_EL0

2
drivers/acpi/apei/ghes.c
View file

@ -957,7 +957,7 @@ int ghes_notify_sea(void)
int rv;
raw_spin_lock(&ghes_notify_lock_sea);
rv = ghes_in_nmi_spool_from_list(&ghes_sea, FIX_APEI_GHES_NMI);
rv = ghes_in_nmi_spool_from_list(&ghes_sea, FIX_APEI_GHES_SEA);
raw_spin_unlock(&ghes_notify_lock_sea);
return rv;