diff options
| author | Yinghai Lu <yinghai@kernel.org> | 2010-12-17 16:58:40 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2010-12-29 14:46:54 -0800 |
| commit | 32e3f2b00c529477d26895c5428ed95bba537443 (patch) | |
| tree | 234eb05abd0060d6fc343583de99e248e27d9d68 /arch | |
| parent | 4b239f458c229de044d6905c2b0f9fe16ed9e01e (diff) | |
x86-64, gart: Fix allocation with memblock
When trying to change alloc_bootmem with memblock to go with real top-down
Found one old system:
[ 0.000000] Node 0: aperture @ ac000000 size 64 MB
[ 0.000000] Aperture pointing to e820 RAM. Ignoring.
[ 0.000000] Your BIOS doesn't leave a aperture memory hole
[ 0.000000] Please enable the IOMMU option in the BIOS setup
[ 0.000000] This costs you 64 MB of RAM
[ 0.000000] memblock_x86_reserve_range: [0x2020000000-0x2023ffffff] aperture64
[ 0.000000] Cannot allocate aperture memory hole (ffff882020000000,65536K)
[ 0.000000] memblock_x86_free_range: [0x2020000000-0x2023ffffff]
[ 0.000000] Kernel panic - not syncing: Not enough memory for aperture
[ 0.000000] Pid: 0, comm: swapper Not tainted 2.6.37-rc5-tip-yh-06229-gb792dc2-dirty #331
[ 0.000000] Call Trace:
[ 0.000000] [<ffffffff81cf50fe>] ? panic+0x91/0x1a3
[ 0.000000] [<ffffffff827c66b2>] ? gart_iommu_hole_init+0x3d7/0x4a3
[ 0.000000] [<ffffffff81d026a9>] ? _etext+0x0/0x3
[ 0.000000] [<ffffffff827ba940>] ? pci_iommu_alloc+0x47/0x71
[ 0.000000] [<ffffffff827c820b>] ? mem_init+0x19/0xec
[ 0.000000] [<ffffffff827b3c40>] ? start_kernel+0x20a/0x3e8
[ 0.000000] [<ffffffff827b32cc>] ? x86_64_start_reservations+0x9c/0xa0
[ 0.000000] [<ffffffff827b33e4>] ? x86_64_start_kernel+0x114/0x11b
it means __alloc_bootmem_nopanic() get too high for that aperture.
Use memblock_find_in_range() with limit directly.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <4D0C0740.90104@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/aperture_64.c | 33 |
1 files changed, 16 insertions, 17 deletions
diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c index dcd7c83e165..85f66b4f4fe 100644 --- a/arch/x86/kernel/aperture_64.c +++ b/arch/x86/kernel/aperture_64.c @@ -13,7 +13,7 @@ #include <linux/kernel.h> #include <linux/types.h> #include <linux/init.h> -#include <linux/bootmem.h> +#include <linux/memblock.h> #include <linux/mmzone.h> #include <linux/pci_ids.h> #include <linux/pci.h> @@ -69,7 +69,7 @@ static void __init insert_aperture_resource(u32 aper_base, u32 aper_size) static u32 __init allocate_aperture(void) { u32 aper_size; - void *p; + unsigned long addr; /* aper_size should <= 1G */ if (fallback_aper_order > 5) @@ -95,27 +95,26 @@ static u32 __init allocate_aperture(void) * so don't use 512M below as gart iommu, leave the space for kernel * code for safe */ - p = __alloc_bootmem_nopanic(aper_size, aper_size, 512ULL<<20); + addr = memblock_find_in_range(0, 1ULL<<32, aper_size, 512ULL<<20); + if (addr == MEMBLOCK_ERROR || addr + aper_size > 0xffffffff) { + printk(KERN_ERR + "Cannot allocate aperture memory hole (%lx,%uK)\n", + addr, aper_size>>10); + return 0; + } + memblock_x86_reserve_range(addr, addr + aper_size, "aperture64"); /* * Kmemleak should not scan this block as it may not be mapped via the * kernel direct mapping. */ - kmemleak_ignore(p); - if (!p || __pa(p)+aper_size > 0xffffffff) { - printk(KERN_ERR - "Cannot allocate aperture memory hole (%p,%uK)\n", - p, aper_size>>10); - if (p) - free_bootmem(__pa(p), aper_size); - return 0; - } + kmemleak_ignore(phys_to_virt(addr)); printk(KERN_INFO "Mapping aperture over %d KB of RAM @ %lx\n", - aper_size >> 10, __pa(p)); - insert_aperture_resource((u32)__pa(p), aper_size); - register_nosave_region((u32)__pa(p) >> PAGE_SHIFT, - (u32)__pa(p+aper_size) >> PAGE_SHIFT); + aper_size >> 10, addr); + insert_aperture_resource((u32)addr, aper_size); + register_nosave_region(addr >> PAGE_SHIFT, + (addr+aper_size) >> PAGE_SHIFT); - return (u32)__pa(p); + return (u32)addr; } |