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>
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 7fcf4d7..e05d84e7 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -105,12 +105,16 @@
*/
/*
- * 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 @@
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 @@
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)