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| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2011-06-03 09:51:34 +0000 |
|---|---|---|
| committer | Andi Kleen <ak@linux.intel.com> | 2011-08-01 13:54:57 -0700 |
| commit | e80440bb851ed3378b9855dd2bc9a3763eef48f1 (patch) | |
| tree | d9ce0ef6040c71d37480d5512c0c62ea709d6834 /arch | |
| parent | a67f6f3794586c33e430d8a8e61d0548d33a3abe (diff) | |
| download | linux-e80440bb851ed3378b9855dd2bc9a3763eef48f1.tar.gz linux-e80440bb851ed3378b9855dd2bc9a3763eef48f1.tar.bz2 linux-e80440bb851ed3378b9855dd2bc9a3763eef48f1.zip | |
xen: partially revert "xen: set max_pfn_mapped to the last pfn mapped"
commit a91d92875ee94e4703fd017ccaadb48cfb344994 upstream.
We only need to set max_pfn_mapped to the last pfn mapped on x86_64 to
make sure that cleanup_highmap doesn't remove important mappings at
_end.
We don't need to do this on x86_32 because cleanup_highmap is not called
on x86_32. Besides lowering max_pfn_mapped on x86_32 has the unwanted
side effect of limiting the amount of memory available for the 1:1
kernel pagetable allocation.
This patch reverts the x86_32 part of the original patch.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/xen/mmu.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index 4916176c53e3..96cdf7806972 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -1641,6 +1641,11 @@ static __init void xen_map_identity_early(pmd_t *pmd, unsigned long max_pfn) for (pteidx = 0; pteidx < PTRS_PER_PTE; pteidx++, pfn++) { pte_t pte; +#ifdef CONFIG_X86_32 + if (pfn > max_pfn_mapped) + max_pfn_mapped = pfn; +#endif + if (!pte_none(pte_page[pteidx])) continue; @@ -1753,7 +1758,9 @@ __init pgd_t *xen_setup_kernel_pagetable(pgd_t *pgd, { pmd_t *kernel_pmd; - max_pfn_mapped = PFN_DOWN(__pa(xen_start_info->mfn_list)); + max_pfn_mapped = PFN_DOWN(__pa(xen_start_info->pt_base) + + xen_start_info->nr_pt_frames * PAGE_SIZE + + 512*1024); kernel_pmd = m2v(pgd[KERNEL_PGD_BOUNDARY].pgd); memcpy(level2_kernel_pgt, kernel_pmd, sizeof(pmd_t) * PTRS_PER_PMD); |