Commit b972d2ea authored Jan 29, 2019 by James Morse Committed by Rafael J. Wysocki Feb 07, 2019

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



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>

parent d9f608dc

arch/arm64/include/asm/fixmap.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -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

drivers/acpi/apei/ghes.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;

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