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authorJan Beulich <JBeulich@suse.com>2017-08-25 16:50:18 +0100
committerIngo Molnar <mingo@kernel.org>2017-08-26 09:20:33 +0200
commit23f0571c9fd184504f7a2f27011750e0ad99bb73 (patch)
tree303f0fc34956bb4e64f1ea0c739f024200789eac /drivers/firmware/efi
parent68ee51cb773bed81f9ff7144eca0a08550e1f9a1 (diff)
efi: Move efi_mem_type() to common code
This follows efi_mem_attributes(), as it's similarly generic. Drop __weak from that one though (and don't introduce it for efi_mem_type() in the first place) to make clear that other overrides to these functions are really not intended. Signed-off-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Jan Beulich <JBeulich@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/20170825155019.6740-5-ard.biesheuvel@linaro.org [ Resolved conflict with: f99afd08a45f: (efi: Update efi_mem_type() to return an error rather than 0) ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/firmware/efi')
-rw-r--r--drivers/firmware/efi/efi.c37
1 files changed, 31 insertions, 6 deletions
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index c8a27a2c30c1..f70febf680c3 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -811,19 +811,19 @@ char * __init efi_md_typeattr_format(char *buf, size_t size,
}
/*
+ * IA64 has a funky EFI memory map that doesn't work the same way as
+ * other architectures.
+ */
+#ifndef CONFIG_IA64
+/*
* efi_mem_attributes - lookup memmap attributes for physical address
* @phys_addr: the physical address to lookup
*
* Search in the EFI memory map for the region covering
* @phys_addr. Returns the EFI memory attributes if the region
* was found in the memory map, 0 otherwise.
- *
- * Despite being marked __weak, most architectures should *not*
- * override this function. It is __weak solely for the benefit
- * of ia64 which has a funky EFI memory map that doesn't work
- * the same way as other architectures.
*/
-u64 __weak efi_mem_attributes(unsigned long phys_addr)
+u64 efi_mem_attributes(unsigned long phys_addr)
{
efi_memory_desc_t *md;
@@ -839,6 +839,31 @@ u64 __weak efi_mem_attributes(unsigned long phys_addr)
return 0;
}
+/*
+ * efi_mem_type - lookup memmap type for physical address
+ * @phys_addr: the physical address to lookup
+ *
+ * Search in the EFI memory map for the region covering @phys_addr.
+ * Returns the EFI memory type if the region was found in the memory
+ * map, EFI_RESERVED_TYPE (zero) otherwise.
+ */
+int efi_mem_type(unsigned long phys_addr)
+{
+ const efi_memory_desc_t *md;
+
+ if (!efi_enabled(EFI_MEMMAP))
+ return -ENOTSUPP;
+
+ for_each_efi_memory_desc(md) {
+ if ((md->phys_addr <= phys_addr) &&
+ (phys_addr < (md->phys_addr +
+ (md->num_pages << EFI_PAGE_SHIFT))))
+ return md->type;
+ }
+ return -EINVAL;
+}
+#endif
+
int efi_status_to_err(efi_status_t status)
{
int err;