x86: fix EFI mapping
The patch updates EFI runtime memory mapping code, by making EFI
areas explicitly executable.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/kernel/efi_64.c b/arch/x86/kernel/efi_64.c
index 674f237..09d5c23 100644
--- a/arch/x86/kernel/efi_64.c
+++ b/arch/x86/kernel/efi_64.c
@@ -54,10 +54,10 @@
else
set_pte(kpte, __pte((pte_val(*kpte) | _PAGE_NX) & \
__supported_pte_mask));
- if (level == 4)
- start = (start + PMD_SIZE) & PMD_MASK;
- else
+ if (level == PG_LEVEL_4K)
start = (start + PAGE_SIZE) & PAGE_MASK;
+ else
+ start = (start + PMD_SIZE) & PMD_MASK;
}
}
@@ -109,23 +109,23 @@
memmap.nr_map * memmap.desc_size);
}
-void __iomem * __init efi_ioremap(unsigned long offset,
- unsigned long size)
+void __iomem * __init efi_ioremap(unsigned long phys_addr, unsigned long size)
{
static unsigned pages_mapped;
- unsigned long last_addr;
unsigned i, pages;
- last_addr = offset + size - 1;
- offset &= PAGE_MASK;
- pages = (PAGE_ALIGN(last_addr) - offset) >> PAGE_SHIFT;
+ /* phys_addr and size must be page aligned */
+ if ((phys_addr & ~PAGE_MASK) || (size & ~PAGE_MASK))
+ return NULL;
+
+ pages = size >> PAGE_SHIFT;
if (pages_mapped + pages > MAX_EFI_IO_PAGES)
return NULL;
for (i = 0; i < pages; i++) {
__set_fixmap(FIX_EFI_IO_MAP_FIRST_PAGE - pages_mapped,
- offset, PAGE_KERNEL_EXEC_NOCACHE);
- offset += PAGE_SIZE;
+ phys_addr, PAGE_KERNEL);
+ phys_addr += PAGE_SIZE;
pages_mapped++;
}