From: Ma Wupeng <mawupeng1@xxxxxxxxxx>
Commit b05b9f5f9dcf ("x86, mirror: x86 enabling - find mirrored memory
ranges") introduce the efi_find_mirror() function on x86. In order to reuse
the API we make it public.
Arm64 can support mirrored memory too, so function efi_find_mirror() is added to
efi_init() to this support for arm64.
Since efi_init() is shared by ARM, arm64 and riscv, this patch will bring
mirror memory support for these architectures, but this support is only tested
in arm64.
Signed-off-by: Ma Wupeng <mawupeng1@xxxxxxxxxx>
---
arch/x86/include/asm/efi.h | 4 ----
arch/x86/platform/efi/efi.c | 23 -----------------------
drivers/firmware/efi/efi-init.c | 1 +
drivers/firmware/efi/efi.c | 23 +++++++++++++++++++++++
include/linux/efi.h | 3 +++
5 files changed, 27 insertions(+), 27 deletions(-)
diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index 71943dce691e..eb90206eae80 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -383,7 +383,6 @@ static inline bool efi_is_64bit(void)
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) {}
@@ -395,9 +394,6 @@ 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 1591d67e0bcd..6e598bd78eef 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -108,29 +108,6 @@ 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/efi-init.c b/drivers/firmware/efi/efi-init.c
index b2c829e95bd1..8e3a0d14dac5 100644
--- a/drivers/firmware/efi/efi-init.c
+++ b/drivers/firmware/efi/efi-init.c
@@ -241,6 +241,7 @@ void __init efi_init(void)
*/
early_init_dt_check_for_usable_mem_range();
+ efi_find_mirror();
efi_esrt_init();
efi_mokvar_table_init();
memblock_reserve(data.phys_map & PAGE_MASK,
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 860534bcfdac..79c232e07de7 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -446,6 +446,29 @@ 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 7d9b0bb47eb3..53f64c14a525 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -872,6 +872,7 @@ static inline bool efi_rt_services_supported(unsigned int mask)
{
return (efi.runtime_supported_mask & mask) == mask;
}
+extern void efi_find_mirror(void);
#else
static inline bool efi_enabled(int feature)
{
@@ -889,6 +890,8 @@ static inline bool efi_rt_services_supported(unsigned int mask)
{
return false;
}
+
+static inline void efi_find_mirror(void) {}
#endif
extern int efi_status_to_err(efi_status_t status);
--
2.25.1
