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| author | Ingo Molnar <mingo@kernel.org> | 2015-09-25 09:28:58 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-09-25 09:28:58 +0200 |
| commit | 9c9ab385bc6c3f0787f742d5e9baf04063d9697a (patch) | |
| tree | cc6ac425f7580a40d011ad2e8fc7974678843e0b /arch/powerpc/platforms/powernv/pci-ioda.c | |
| parent | 93f13a9f96771a064c716364aebc6e283b186eb8 (diff) | |
| parent | bcee19f424a0d8c26ecf2607b73c690802658b29 (diff) | |
| download | talos-op-linux-9c9ab385bc6c3f0787f742d5e9baf04063d9697a.tar.gz talos-op-linux-9c9ab385bc6c3f0787f742d5e9baf04063d9697a.zip | |
Merge branch 'linus' into x86/asm, to refresh the tree before applying new changes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/powerpc/platforms/powernv/pci-ioda.c')
| -rw-r--r-- | arch/powerpc/platforms/powernv/pci-ioda.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 2927cd5c8303..414fd1a00fda 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -2049,9 +2049,23 @@ static long pnv_pci_ioda2_setup_default_config(struct pnv_ioda_pe *pe) struct iommu_table *tbl = NULL; long rc; + /* + * crashkernel= specifies the kdump kernel's maximum memory at + * some offset and there is no guaranteed the result is a power + * of 2, which will cause errors later. + */ + const u64 max_memory = __rounddown_pow_of_two(memory_hotplug_max()); + + /* + * In memory constrained environments, e.g. kdump kernel, the + * DMA window can be larger than available memory, which will + * cause errors later. + */ + const u64 window_size = min((u64)pe->table_group.tce32_size, max_memory); + rc = pnv_pci_ioda2_create_table(&pe->table_group, 0, IOMMU_PAGE_SHIFT_4K, - pe->table_group.tce32_size, + window_size, POWERNV_IOMMU_DEFAULT_LEVELS, &tbl); if (rc) { pe_err(pe, "Failed to create 32-bit TCE table, err %ld", |
