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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2016-02-16 13:52:41 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2016-02-18 18:16:49 +0000 |
| commit | a89dea585371a9d5d85499db47c93f129be8e0c4 (patch) | |
| tree | cb10715cd4d2c4502d0a52d369a4ce5619f00358 | |
| parent | f9040773b7bbbd9e98eb6184a263512a7cfc133f (diff) | |
| download | linux-stable-a89dea585371a9d5d85499db47c93f129be8e0c4.tar.gz linux-stable-a89dea585371a9d5d85499db47c93f129be8e0c4.tar.bz2 linux-stable-a89dea585371a9d5d85499db47c93f129be8e0c4.zip | |
arm64: defer __va translation of initrd_start and initrd_end
Before deferring the assignment of memstart_addr in a subsequent patch, to
the moment where all memory has been discovered and possibly clipped based
on the size of the linear region and the presence of a mem= command line
parameter, we need to ensure that memstart_addr is not used to perform __va
translations before it is assigned.
One such use is in the generic early DT discovery of the initrd location,
which is recorded as a virtual address in the globals initrd_start and
initrd_end. So wire up the generic support to declare the initrd addresses,
and implement it without __va() translations, and perform the translation
after memstart_addr has been assigned.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| -rw-r--r-- | arch/arm64/include/asm/memory.h | 8 | ||||
| -rw-r--r-- | arch/arm64/mm/init.c | 13 |
2 files changed, 17 insertions, 4 deletions
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index 4388651d1f0d..18b7e77c7495 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -121,6 +121,14 @@ #define IOREMAP_MAX_ORDER (PMD_SHIFT) #endif +#ifdef CONFIG_BLK_DEV_INITRD +#define __early_init_dt_declare_initrd(__start, __end) \ + do { \ + initrd_start = (__start); \ + initrd_end = (__end); \ + } while (0) +#endif + #ifndef __ASSEMBLY__ extern phys_addr_t memstart_addr; diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index 1d627cd8121c..52d1fc465885 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -59,8 +59,8 @@ static int __init early_initrd(char *p) if (*endp == ',') { size = memparse(endp + 1, NULL); - initrd_start = (unsigned long)__va(start); - initrd_end = (unsigned long)__va(start + size); + initrd_start = start; + initrd_end = start + size; } return 0; } @@ -168,8 +168,13 @@ void __init arm64_memblock_init(void) */ memblock_reserve(__pa(_text), _end - _text); #ifdef CONFIG_BLK_DEV_INITRD - if (initrd_start) - memblock_reserve(__virt_to_phys(initrd_start), initrd_end - initrd_start); + if (initrd_start) { + memblock_reserve(initrd_start, initrd_end - initrd_start); + + /* the generic initrd code expects virtual addresses */ + initrd_start = __phys_to_virt(initrd_start); + initrd_end = __phys_to_virt(initrd_end); + } #endif early_init_fdt_scan_reserved_mem(); |