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arm64: mm: Remove arch_apei_flush_tlb_one()

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Nothing calls arch_apei_flush_tlb_one() anymore, instead relying on
__set_fixmap() to do the invalidation. Remove it.

Move the IPI-considered-harmful comment to __set_fixmap().

Signed-off-by: James Morse <james.morse@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Tested-by: Tyler Baicar <tbaicar@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: All applicable <stable@vger.kernel.org>
This commit is contained in:
James Morse 2017-11-06 18:44:26 +00:00 committed by Rafael J. Wysocki
parent 520e18a508
commit 18b4b276b4
2 changed files with 4 additions and 12 deletions
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12
arch/arm64/include/asm/acpi.h
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@ -126,18 +126,6 @@ static inline const char *acpi_get_enable_method(int cpu)
*/
#define acpi_disable_cmcff 1
pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr);
/*
* Despite its name, this function must still broadcast the TLB
* invalidation in order to ensure other CPUs don't end up with junk
* entries as a result of speculation. Unusually, its also called in
* IRQ context (ghes_iounmap_irq) so if we ever need to use IPIs for
* TLB broadcasting, then we're in trouble here.
*/
static inline void arch_apei_flush_tlb_one(unsigned long addr)
{
flush_tlb_kernel_range(addr, addr + PAGE_SIZE);
}
#endif /* CONFIG_ACPI_APEI */
#ifdef CONFIG_ACPI_NUMA

4
arch/arm64/mm/mmu.c
View file

@ -778,6 +778,10 @@ void __init early_fixmap_init(void)
}
}
/*
* Unusually, this is also called in IRQ context (ghes_iounmap_irq) so if we
* ever need to use IPIs for TLB broadcasting, then we're in trouble here.
*/
void __set_fixmap(enum fixed_addresses idx,
phys_addr_t phys, pgprot_t flags)
{