diff options
Diffstat (limited to 'Documentation/admin-guide/kernel-parameters.txt')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index fe64f0c814ea..ec92120a7952 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1165,10 +1165,10 @@ efi= [EFI] Format: { "old_map", "nochunk", "noruntime", "debug", - "nosoftreserve" } + "nosoftreserve", "disable_early_pci_dma", + "no_disable_early_pci_dma" } old_map [X86-64]: switch to the old ioremap-based EFI - runtime services mapping. 32-bit still uses this one by - default. + runtime services mapping. [Needs CONFIG_X86_UV=y] nochunk: disable reading files in "chunks" in the EFI boot stub, as chunking can cause problems with some firmware implementations. @@ -1180,6 +1180,10 @@ claim. Specify efi=nosoftreserve to disable this reservation and treat the memory by its base type (i.e. EFI_CONVENTIONAL_MEMORY / "System RAM"). + disable_early_pci_dma: Disable the busmaster bit on all + PCI bridges while in the EFI boot stub + no_disable_early_pci_dma: Leave the busmaster bit set + on all PCI bridges while in the EFI boot stub efi_no_storage_paranoia [EFI; X86] Using this parameter you can use more than 50% of |