Commit b05b9f5f9dcf ("x86, mirror: x86 enabling - find
mirrored memory ranges") introduced the efi_find_mirror
on x86. Now we can scan the memory map and find mirrored
memory ranges by calling efi_find_mirror on arm64 platform.
For example, if "efi_fake_mem=4G@1G:0x10000,4G@7G:0x10000"
is specified, the original (firmware provided) EFI memmap will be
updated so that the specified memory regions have
EFI_MEMORY_MORE_RELIABLE attribute (0x10000):
<original>
efi: mem02: [Conventional Memory| | | | | | | | | |WB|
| | ] range=[0x0000000040000000-0x00000001b5035fff] (5968MB)
efi: mem28: [Conventional Memory| | | | | | | | | |WB|
| | ] range=[0x00000001c0000000-0x00000002843fffff] (3140MB)
efi: mem29: [Loader Data | | | | | | | | | |WB|
| | ] range=[0x0000000284400000-0x0000000285f18fff] (27MB)
efi: mem30: [Conventional Memory| | | | | | | | | |WB|
| | ] range=[0x0000000285f19000-0x000000033fbfffff] (2972MB)
<updated>
efi: mem02: [Conventional Memory| |MR| | | | | | | |WB|
| | ] range=[0x0000000040000000-0x000000013fffffff] (4096MB)
efi: mem03: [Conventional Memory| | | | | | | | | |WB|
| | ] range=[0x0000000140000000-0x00000001b5035fff] (1872MB)
efi: mem29: [Conventional Memory| |MR| | | | | | | |WB|
| | ] range=[0x00000001c0000000-0x00000002843fffff] (3140MB)
efi: mem30: [Loader Data | |MR| | | | | | | |WB|
| | ] range=[0x0000000284400000-0x0000000285f18fff] (27MB)
efi: mem31: [Conventional Memory| |MR| | | | | | | |WB|
| | ] range=[0x0000000285f19000-0x00000002bfffffff] (928MB)
And you will find that the following message is output:
efi: Memory: 8192M/12352M mirrored memory
Signed-off-by: Jing Xiangfeng <jingxiangfeng@xxxxxxxxxx>
---
arch/x86/include/asm/efi.h | 4 ----
arch/x86/platform/efi/efi.c | 23 -----------------------
drivers/firmware/efi/arm-init.c | 1 +
drivers/firmware/efi/efi.c | 23 +++++++++++++++++++++++
include/linux/efi.h | 4 ++++
5 files changed, 28 insertions(+), 27 deletions(-)
diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index 127977f..24fa6a9 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -330,7 +330,6 @@ static inline void *efi64_zero_upper(void *p)
extern bool efi_reboot_required(void);
extern bool efi_is_table_address(unsigned long phys_addr);
-extern void efi_find_mirror(void);
extern void efi_reserve_boot_services(void);
#else
static inline void parse_efi_setup(u64 phys_addr, u32 data_len) {}
@@ -342,9 +341,6 @@ static inline bool efi_is_table_address(unsigned long phys_addr)
{
return false;
}
-static inline void efi_find_mirror(void)
-{
-}
static inline void efi_reserve_boot_services(void)
{
}
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 4c8793d..c06603d 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -97,29 +97,6 @@ static int __init setup_add_efi_memmap(char *arg)
}
early_param("add_efi_memmap", setup_add_efi_memmap);
-void __init efi_find_mirror(void)
-{
- efi_memory_desc_t *md;
- u64 mirror_size = 0, total_size = 0;
-
- if (!efi_enabled(EFI_MEMMAP))
- return;
-
- for_each_efi_memory_desc(md) {
- unsigned long long start = md->phys_addr;
- unsigned long long size = md->num_pages << EFI_PAGE_SHIFT;
-
- total_size += size;
- if (md->attribute & EFI_MEMORY_MORE_RELIABLE) {
- memblock_mark_mirror(start, size);
- mirror_size += size;
- }
- }
- if (mirror_size)
- pr_info("Memory: %lldM/%lldM mirrored memory\n",
- mirror_size>>20, total_size>>20);
-}
-
/*
* Tell the kernel about the EFI memory map. This might include
* more than the max 128 entries that can fit in the passed in e820
diff --git a/drivers/firmware/efi/arm-init.c b/drivers/firmware/efi/arm-init.c
index ac00e7c..f86e73e 100644
--- a/drivers/firmware/efi/arm-init.c
+++ b/drivers/firmware/efi/arm-init.c
@@ -266,6 +266,7 @@ void __init efi_init(void)
reserve_regions();
efi_fake_memmap();
+ efi_find_mirror();
efi_esrt_init();
memblock_reserve(params.mmap & PAGE_MASK,
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 621220a..664d01d 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -394,6 +394,29 @@ static int __init efisubsys_init(void)
subsys_initcall(efisubsys_init);
+void __init efi_find_mirror(void)
+{
+ efi_memory_desc_t *md;
+ u64 mirror_size = 0, total_size = 0;
+
+ if (!efi_enabled(EFI_MEMMAP))
+ return;
+
+ for_each_efi_memory_desc(md) {
+ unsigned long long start = md->phys_addr;
+ unsigned long long size = md->num_pages << EFI_PAGE_SHIFT;
+
+ total_size += size;
+ if (md->attribute & EFI_MEMORY_MORE_RELIABLE) {
+ memblock_mark_mirror(start, size);
+ mirror_size += size;
+ }
+ }
+ if (mirror_size)
+ pr_info("Memory: %lldM/%lldM mirrored memory\n",
+ mirror_size>>20, total_size>>20);
+}
+
/*
* Find the efi memory descriptor for a given physical address. Given a
* physical address, determine if it exists within an EFI Memory Map entry,
diff --git a/include/linux/efi.h b/include/linux/efi.h
index bf101e5..bb32e37 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -1143,6 +1143,7 @@ static inline bool __pure efi_soft_reserve_enabled(void)
&& __efi_soft_reserve_enabled();
}
extern void __init efi_print_memmap(void);
+extern void efi_find_mirror(void);
#else
static inline bool efi_enabled(int feature)
{
@@ -1161,6 +1162,9 @@ static inline bool efi_soft_reserve_enabled(void)
{
return false;
}
+static inline void efi_find_mirror(void)
+{
+}
#endif
extern int efi_status_to_err(efi_status_t status);
--
1.8.3.1
