mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2025-01-01 11:24:25 +08:00
df43acac8e
The aim of this machvec is to support devices with < 32-bit dma masks. But given that ia64 only has a ZONE_DMA32 and not a ZONE_DMA that isn't supported by swiotlb either. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lkml.kernel.org/r/20190813072514.23299-21-hch@lst.de Signed-off-by: Tony Luck <tony.luck@intel.com>
56 lines
1.8 KiB
Plaintext
56 lines
1.8 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0
|
|
|
|
choice
|
|
prompt "Physical memory granularity"
|
|
default IA64_GRANULE_64MB
|
|
|
|
config IA64_GRANULE_16MB
|
|
bool "16MB"
|
|
help
|
|
IA-64 identity-mapped regions use a large page size called "granules".
|
|
|
|
Select "16MB" for a small granule size.
|
|
Select "64MB" for a large granule size. This is the current default.
|
|
|
|
config IA64_GRANULE_64MB
|
|
bool "64MB"
|
|
depends on !(IA64_GENERIC || IA64_HP_ZX1)
|
|
|
|
endchoice
|
|
|
|
config IA64_PRINT_HAZARDS
|
|
bool "Print possible IA-64 dependency violations to console"
|
|
depends on DEBUG_KERNEL
|
|
help
|
|
Selecting this option prints more information for Illegal Dependency
|
|
Faults, that is, for Read-after-Write (RAW), Write-after-Write (WAW),
|
|
or Write-after-Read (WAR) violations. This option is ignored if you
|
|
are compiling for an Itanium A step processor
|
|
(CONFIG_ITANIUM_ASTEP_SPECIFIC). If you're unsure, select Y.
|
|
|
|
config DISABLE_VHPT
|
|
bool "Disable VHPT"
|
|
depends on DEBUG_KERNEL
|
|
help
|
|
The Virtual Hash Page Table (VHPT) enhances virtual address
|
|
translation performance. Normally you want the VHPT active but you
|
|
can select this option to disable the VHPT for debugging. If you're
|
|
unsure, answer N.
|
|
|
|
config IA64_DEBUG_CMPXCHG
|
|
bool "Turn on compare-and-exchange bug checking (slow!)"
|
|
depends on DEBUG_KERNEL
|
|
help
|
|
Selecting this option turns on bug checking for the IA-64
|
|
compare-and-exchange instructions. This is slow! Itaniums
|
|
from step B3 or later don't have this problem. If you're unsure,
|
|
select N.
|
|
|
|
config IA64_DEBUG_IRQ
|
|
bool "Turn on irq debug checks (slow!)"
|
|
depends on DEBUG_KERNEL
|
|
help
|
|
Selecting this option turns on bug checking for the IA-64 irq_save
|
|
and restore instructions. It's useful for tracking down spinlock
|
|
problems, but slow! If you're unsure, select N.
|