In order to enable the EFI memory map to be initialized outside of
efi_init(), decouple the two functions efi_memmap_init() and
do_add_efi_memmap() and set the x86_facility EFI_MEMMAP in
efi_memmap_init(). Additionally, check EFI_MEMMAP to determine whether
efi_memmap_init() has been previously called to avoid doing the
initialization more than once.
Signed-off-by: Linn Crosetto <linn@xxxxxx>
---
arch/x86/platform/efi/efi.c | 44 ++++++++++++++++++++++++++------------------
1 file changed, 26 insertions(+), 18 deletions(-)
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 90f6ed1..32da922 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -326,6 +326,24 @@ void efi_get_time(struct timespec *now)
now->tv_nsec = 0;
}
+static int __init efi_memmap_init(void)
+{
+ if (efi_enabled(EFI_MEMMAP))
+ return 0; /* already initialized */
+
+ /* Map the EFI memory map */
+ memmap.map = early_ioremap((unsigned long)memmap.phys_map,
+ memmap.nr_map * memmap.desc_size);
+ if (memmap.map == NULL) {
+ pr_err("Could not map the memory map!\n");
+ return -ENOMEM;
+ }
+ memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size);
+
+ set_bit(EFI_MEMMAP, &x86_efi_facility);
+ return 0;
+}
+
/*
* Tell the kernel about the EFI memory map. This might include
* more than the max 128 entries that can fit in the e820 legacy
@@ -336,6 +354,9 @@ static void __init do_add_efi_memmap(void)
{
void *p;
+ if (!efi_enabled(EFI_MEMMAP) && efi_memmap_init())
+ return;
+
for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
efi_memory_desc_t *md = p;
unsigned long long start = md->phys_addr;
@@ -409,6 +430,9 @@ static void __init print_efi_memmap(void)
void *p;
int i;
+ if (!efi_enabled(EFI_MEMMAP))
+ return;
+
for (p = memmap.map, i = 0;
p < memmap.map_end;
p += memmap.desc_size, i++) {
@@ -687,23 +711,6 @@ static int __init efi_runtime_init(void)
return 0;
}
-static int __init efi_memmap_init(void)
-{
- /* Map the EFI memory map */
- memmap.map = early_ioremap((unsigned long)memmap.phys_map,
- memmap.nr_map * memmap.desc_size);
- if (memmap.map == NULL) {
- pr_err("Could not map the memory map!\n");
- return -ENOMEM;
- }
- memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size);
-
- if (add_efi_memmap)
- do_add_efi_memmap();
-
- return 0;
-}
-
void __init efi_init(void)
{
efi_char16_t *c16;
@@ -766,7 +773,8 @@ void __init efi_init(void)
if (efi_memmap_init())
return;
- set_bit(EFI_MEMMAP, &x86_efi_facility);
+ if (add_efi_memmap)
+ do_add_efi_memmap();
#ifdef CONFIG_X86_32
if (efi_is_native()) {
--
1.7.11.3
--
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