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| author | Tomasz Nowicki <tomasz.nowicki@linaro.org> | 2014-07-22 11:20:13 +0200 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2014-07-22 15:05:06 -0700 |
| commit | 594c7255dce7a13cac50cf2470cc56e2c3b0494e (patch) | |
| tree | 057da64928a17b6e13e923ec2baad9181886c704 /drivers/acpi/apei/ghes.c | |
| parent | 44a69f6195628f6f940566d133a72987559e102d (diff) | |
| download | lwn-594c7255dce7a13cac50cf2470cc56e2c3b0494e.tar.gz lwn-594c7255dce7a13cac50cf2470cc56e2c3b0494e.zip | |
acpi, apei, ghes: Factor out ioremap virtual memory for IRQ and NMI context.
GHES currently maps two pages with atomic_ioremap. From now
on, NMI is architectural depended so there is no need to allocate
an NMI page for platforms without NMI support.
To make it possible to not use a second page, swap the existing
page order so that the IRQ context page is first, and the optional
NMI context page is second. Then, use HAVE_ACPI_APEI_NMI to decide
how many pages are to be allocated.
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'drivers/acpi/apei/ghes.c')
| -rw-r--r-- | drivers/acpi/apei/ghes.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index 7fcf4d7b41f6..e05d84e7b06d 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -105,12 +105,16 @@ static DEFINE_MUTEX(ghes_list_mutex); */ /* - * Two virtual pages are used, one for NMI context, the other for - * IRQ/PROCESS context + * Two virtual pages are used, one for IRQ/PROCESS context, the other for + * NMI context (optionally). */ -#define GHES_IOREMAP_PAGES 2 -#define GHES_IOREMAP_NMI_PAGE(base) (base) -#define GHES_IOREMAP_IRQ_PAGE(base) ((base) + PAGE_SIZE) +#ifdef CONFIG_HAVE_ACPI_APEI_NMI +#define GHES_IOREMAP_PAGES 2 +#else +#define GHES_IOREMAP_PAGES 1 +#endif +#define GHES_IOREMAP_IRQ_PAGE(base) (base) +#define GHES_IOREMAP_NMI_PAGE(base) ((base) + PAGE_SIZE) /* virtual memory area for atomic ioremap */ static struct vm_struct *ghes_ioremap_area; @@ -173,7 +177,7 @@ static void ghes_iounmap_nmi(void __iomem *vaddr_ptr) BUG_ON(vaddr != (unsigned long)GHES_IOREMAP_NMI_PAGE(base)); unmap_kernel_range_noflush(vaddr, PAGE_SIZE); - __flush_tlb_one(vaddr); + arch_apei_flush_tlb_one(vaddr); } static void ghes_iounmap_irq(void __iomem *vaddr_ptr) @@ -183,7 +187,7 @@ static void ghes_iounmap_irq(void __iomem *vaddr_ptr) BUG_ON(vaddr != (unsigned long)GHES_IOREMAP_IRQ_PAGE(base)); unmap_kernel_range_noflush(vaddr, PAGE_SIZE); - __flush_tlb_one(vaddr); + arch_apei_flush_tlb_one(vaddr); } static int ghes_estatus_pool_init(void) |