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Message-ID: <tip-44511fb9e55ada760822b0b0d7be9d150576f17f@git.kernel.org>
Date: Wed, 28 Oct 2015 13:57:37 -0700
From: tip-bot for Ard Biesheuvel <tipbot@...or.com>
To: linux-tip-commits@...r.kernel.org
Cc: tglx@...utronix.de, torvalds@...ux-foundation.org,
peterz@...radead.org, mingo@...nel.org, matt@...eblueprint.co.uk,
hpa@...or.com, linux-kernel@...r.kernel.org,
ard.biesheuvel@...aro.org
Subject: [tip:core/efi] efi: Use correct type for struct efi_memory_map::
phys_map
Commit-ID: 44511fb9e55ada760822b0b0d7be9d150576f17f
Gitweb: http://git.kernel.org/tip/44511fb9e55ada760822b0b0d7be9d150576f17f
Author: Ard Biesheuvel <ard.biesheuvel@...aro.org>
AuthorDate: Fri, 23 Oct 2015 11:48:16 +0200
Committer: Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 28 Oct 2015 12:28:06 +0100
efi: Use correct type for struct efi_memory_map::phys_map
We have been getting away with using a void* for the physical
address of the UEFI memory map, since, even on 32-bit platforms
with 64-bit physical addresses, no truncation takes place if the
memory map has been allocated by the firmware (which only uses
1:1 virtually addressable memory), which is usually the case.
However, commit:
0f96a99dab36 ("efi: Add "efi_fake_mem" boot option")
adds code that clones and modifies the UEFI memory map, and the
clone may live above 4 GB on 32-bit platforms.
This means our use of void* for struct efi_memory_map::phys_map has
graduated from 'incorrect but working' to 'incorrect and
broken', and we need to fix it.
So redefine struct efi_memory_map::phys_map as phys_addr_t, and
get rid of a bunch of casts that are now unneeded.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
Reviewed-by: Matt Fleming <matt@...eblueprint.co.uk>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: izumi.taku@...fujitsu.com
Cc: kamezawa.hiroyu@...fujitsu.com
Cc: linux-efi@...r.kernel.org
Cc: matt.fleming@...el.com
Link: http://lkml.kernel.org/r/1445593697-1342-1-git-send-email-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
arch/arm64/kernel/efi.c | 4 ++--
arch/x86/platform/efi/efi.c | 4 ++--
drivers/firmware/efi/efi.c | 8 ++++----
include/linux/efi.h | 2 +-
4 files changed, 9 insertions(+), 9 deletions(-)
diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c
index 4b7df34..61eb1d1 100644
--- a/arch/arm64/kernel/efi.c
+++ b/arch/arm64/kernel/efi.c
@@ -208,7 +208,7 @@ void __init efi_init(void)
memblock_reserve(params.mmap & PAGE_MASK,
PAGE_ALIGN(params.mmap_size + (params.mmap & ~PAGE_MASK)));
- memmap.phys_map = (void *)params.mmap;
+ memmap.phys_map = params.mmap;
memmap.map = early_memremap(params.mmap, params.mmap_size);
memmap.map_end = memmap.map + params.mmap_size;
memmap.desc_size = params.desc_size;
@@ -282,7 +282,7 @@ static int __init arm64_enable_runtime_services(void)
pr_info("Remapping and enabling EFI services.\n");
mapsize = memmap.map_end - memmap.map;
- memmap.map = (__force void *)ioremap_cache((phys_addr_t)memmap.phys_map,
+ memmap.map = (__force void *)ioremap_cache(memmap.phys_map,
mapsize);
if (!memmap.map) {
pr_err("Failed to remap EFI memory map\n");
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 3e1d09e..ad28540 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -194,7 +194,7 @@ static void __init do_add_efi_memmap(void)
int __init efi_memblock_x86_reserve_range(void)
{
struct efi_info *e = &boot_params.efi_info;
- unsigned long pmap;
+ phys_addr_t pmap;
if (efi_enabled(EFI_PARAVIRT))
return 0;
@@ -209,7 +209,7 @@ int __init efi_memblock_x86_reserve_range(void)
#else
pmap = (e->efi_memmap | ((__u64)e->efi_memmap_hi << 32));
#endif
- memmap.phys_map = (void *)pmap;
+ memmap.phys_map = pmap;
memmap.nr_map = e->efi_memmap_size /
e->efi_memdesc_size;
memmap.desc_size = e->efi_memdesc_size;
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 31fc864..027ca21 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -254,7 +254,7 @@ subsys_initcall(efisubsys_init);
int __init efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md)
{
struct efi_memory_map *map = efi.memmap;
- void *p, *e;
+ phys_addr_t p, e;
if (!efi_enabled(EFI_MEMMAP)) {
pr_err_once("EFI_MEMMAP is not enabled.\n");
@@ -286,10 +286,10 @@ int __init efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md)
* So just always get our own virtual map on the CPU.
*
*/
- md = early_memremap((phys_addr_t)p, sizeof (*md));
+ md = early_memremap(p, sizeof (*md));
if (!md) {
- pr_err_once("early_memremap(%p, %zu) failed.\n",
- p, sizeof (*md));
+ pr_err_once("early_memremap(%pa, %zu) failed.\n",
+ &p, sizeof (*md));
return -ENOMEM;
}
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 4d01c10..569b5a8 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -680,7 +680,7 @@ typedef struct {
} efi_system_table_t;
struct efi_memory_map {
- void *phys_map;
+ phys_addr_t phys_map;
void *map;
void *map_end;
int nr_map;
--
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