diff options
| author | Yinghai Lu <yinghai@kernel.org> | 2013-01-24 12:20:05 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2013-01-29 15:26:35 -0800 |
| commit | 0e691cf824f76adefb4498fe39c300aba2c2575a (patch) | |
| tree | 6e61f59e7f100eac02a9aa7e064eaaa34e4e1904 /arch/x86/kernel/machine_kexec_64.c | |
| parent | 9ebdc79f7a177d3098b89ba8ef2dd2b235163685 (diff) | |
x86, kexec, 64bit: Only set ident mapping for ram.
We should set mappings only for usable memory ranges under max_pfn
Otherwise causes same problem that is fixed by
x86, mm: Only direct map addresses that are marked as E820_RAM
This patch exposes pfn_mapped array, and only sets ident mapping for ranges
in that array.
This patch relies on new kernel_ident_mapping_init that could handle existing
pgd/pud between different calls.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1359058816-7615-25-git-send-email-yinghai@kernel.org
Cc: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/kernel/machine_kexec_64.c')
| -rw-r--r-- | arch/x86/kernel/machine_kexec_64.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c index d2d7e023a8c8..4eabc160696f 100644 --- a/arch/x86/kernel/machine_kexec_64.c +++ b/arch/x86/kernel/machine_kexec_64.c @@ -100,10 +100,15 @@ static int init_pgtable(struct kimage *image, unsigned long start_pgtable) level4p = (pgd_t *)__va(start_pgtable); clear_page(level4p); - result = kernel_ident_mapping_init(&info, level4p, - 0, max_pfn << PAGE_SHIFT); - if (result) - return result; + for (i = 0; i < nr_pfn_mapped; i++) { + mstart = pfn_mapped[i].start << PAGE_SHIFT; + mend = pfn_mapped[i].end << PAGE_SHIFT; + + result = kernel_ident_mapping_init(&info, + level4p, mstart, mend); + if (result) + return result; + } /* * segments's mem ranges could be outside 0 ~ max_pfn, |