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authorArtiom Myaskouvskey <artiom.myaskouvskey@intel.com>2006-12-07 02:14:11 +0100
committerAndi Kleen <andi@basil.nowhere.org>2006-12-07 02:14:11 +0100
commitbf7e6a196318316e921f357557fca9d11d15f486 (patch)
tree7484602fdde8eab3b750b4e9bd3f3d9a2edc628e
parentf990fff427d68af3e4e1d16fe799c106abc0bf53 (diff)
downloadlinux-bf7e6a196318316e921f357557fca9d11d15f486.tar.bz2
[PATCH] i386: Preserve EFI run time regions with memmap parameter
When using memmap kernel parameter in EFI boot we should also add to memory map memory regions of runtime services to enable their mapping later. AK: merged and cleaned up the patch Signed-off-by: Artiom Myaskouvskey <artiom.myaskouvskey@intel.com> Signed-off-by: Andi Kleen <ak@suse.de>
-rw-r--r--arch/i386/kernel/e820.c60
-rw-r--r--arch/i386/mm/init.c2
-rw-r--r--include/linux/efi.h1
3 files changed, 44 insertions, 19 deletions
diff --git a/arch/i386/kernel/e820.c b/arch/i386/kernel/e820.c
index b704790f7969..2f7d0a92fd7c 100644
--- a/arch/i386/kernel/e820.c
+++ b/arch/i386/kernel/e820.c
@@ -742,29 +742,55 @@ void __init print_memory_map(char *who)
}
}
-void __init limit_regions(unsigned long long size)
+static __init __always_inline void efi_limit_regions(unsigned long long size)
{
unsigned long long current_addr = 0;
+ efi_memory_desc_t *md, *next_md;
+ void *p, *p1;
+ int i, j;
+
+ j = 0;
+ p1 = memmap.map;
+ for (p = p1, i = 0; p < memmap.map_end; p += memmap.desc_size, i++) {
+ md = p;
+ next_md = p1;
+ current_addr = md->phys_addr +
+ PFN_PHYS(md->num_pages);
+ if (is_available_memory(md)) {
+ if (md->phys_addr >= size) continue;
+ memcpy(next_md, md, memmap.desc_size);
+ if (current_addr >= size) {
+ next_md->num_pages -=
+ PFN_UP(current_addr-size);
+ }
+ p1 += memmap.desc_size;
+ next_md = p1;
+ j++;
+ } else if ((md->attribute & EFI_MEMORY_RUNTIME) ==
+ EFI_MEMORY_RUNTIME) {
+ /* In order to make runtime services
+ * available we have to include runtime
+ * memory regions in memory map */
+ memcpy(next_md, md, memmap.desc_size);
+ p1 += memmap.desc_size;
+ next_md = p1;
+ j++;
+ }
+ }
+ memmap.nr_map = j;
+ memmap.map_end = memmap.map +
+ (memmap.nr_map * memmap.desc_size);
+}
+
+void __init limit_regions(unsigned long long size)
+{
+ unsigned long long current_addr;
int i;
print_memory_map("limit_regions start");
if (efi_enabled) {
- efi_memory_desc_t *md;
- void *p;
-
- for (p = memmap.map, i = 0; p < memmap.map_end;
- p += memmap.desc_size, i++) {
- md = p;
- current_addr = md->phys_addr + (md->num_pages << 12);
- if (md->type == EFI_CONVENTIONAL_MEMORY) {
- if (current_addr >= size) {
- md->num_pages -=
- (((current_addr-size) + PAGE_SIZE-1) >> PAGE_SHIFT);
- memmap.nr_map = i + 1;
- return;
- }
- }
- }
+ efi_limit_regions(size);
+ return;
}
for (i = 0; i < e820.nr_map; i++) {
current_addr = e820.map[i].addr + e820.map[i].size;
diff --git a/arch/i386/mm/init.c b/arch/i386/mm/init.c
index 167416155ee4..f4dd048187ff 100644
--- a/arch/i386/mm/init.c
+++ b/arch/i386/mm/init.c
@@ -192,8 +192,6 @@ static inline int page_kills_ppro(unsigned long pagenr)
return 0;
}
-extern int is_available_memory(efi_memory_desc_t *);
-
int page_is_ram(unsigned long pagenr)
{
int i;
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 91ecf49fbf21..df1c91855f0e 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -302,6 +302,7 @@ extern void efi_initialize_iomem_resources(struct resource *code_resource,
struct resource *data_resource);
extern unsigned long efi_get_time(void);
extern int __init efi_set_rtc_mmss(unsigned long nowtime);
+extern int is_available_memory(efi_memory_desc_t * md);
extern struct efi_memory_map memmap;
/**