Add IOMMU_DMA_MODE_IS_LAZY() and IOMMU_DMA_MODE_IS_PASSTHROUGH() to make
the code looks cleaner.
There is no functional change, just prepare for the following patches.
Signed-off-by: Zhen Lei
---
drivers/iommu/iommu.c | 12
include/linux/iommu.h | 11 +++
2 files changed,
As Robin Murphy's suggestion:
"It's also not necessarily obvious to the user how this interacts with
IOMMU_DEFAULT_PASSTHROUGH, so if we really do go down this route, maybe it
would be better to refactor the whole lot into a single selection of something
like IOMMU_DEFAULT_MODE anyway."
In this
On Tue, 2 Apr 2019 15:30:35 +0900
William Breathitt Gray wrote:
> Changes in v10:
> - Fix minor typographical errors in documentation
> - Merge the FlexTimer Module Quadrature decoder counter driver patches
>
> This revision is functionally identical to the last; changes in this
> version
s390_iommu=strict can be replaced with iommu.dma_mode=strict.
Signed-off-by: Zhen Lei
---
Documentation/admin-guide/kernel-parameters.txt | 7 ---
arch/s390/pci/pci_dma.c | 20 +---
drivers/iommu/Kconfig | 1 +
3 files
First, add build option IOMMU_DMA_MODE_LAZY, so that we have the
opportunity to set lazy mode as default at build time. Then put the
three config options in an choice, make people can only choose one of the
three at a time, the same to the boot options iommu.dma_mode.
Signed-off-by: Zhen Lei
---
iommu=pt can be replaced with iommu.dma_mode=passthrough.
iommu=nopt can be replaced with iommu.dma_mode=lazy.
intel_iommu=strict can be replaced with iommu.dma_mode=strict.
amd_iommu=fullflush can be replaced with iommu.dma_mode=strict.
Note: intel_iommu_strict is not deleted because it can also
Currently the IOMMU dma contains 3 modes: passthrough, lazy, strict. The
passthrough mode bypass the IOMMU, the lazy mode defer the invalidation
of hardware TLBs, and the strict mode invalidate IOMMU hardware TLBs
synchronously. The three modes are mutually exclusive. So people maybe
confused
iommu=nobypass can be replaced with iommu.dma_mode=strict.
Signed-off-by: Zhen Lei
---
Documentation/admin-guide/kernel-parameters.txt | 2 --
arch/powerpc/platforms/powernv/pci-ioda.c | 23 +--
drivers/iommu/Kconfig | 1 +
3 files changed,
On Tue, Apr 02, 2019 at 03:31:01PM +1100, Alexey Kardashevskiy wrote:
> When called with vmas_arg==NULL, get_user_pages_longterm() allocates
> an array of nr_pages*8 which can easily get greater that the max order,
> for example, registering memory for a 256GB guest does this and fails
> in
On Mon, Apr 8, 2019 at 1:06 PM Christopher M. Riedl wrote:
>
> Operations which write to memory and special purpose registers should be
> restricted on systems with integrity guarantees (such as Secure Boot)
> and, optionally, to avoid self-destructive behaviors.
>
> Add a config option, XMON_RW,
Operations which write to memory and special purpose registers should be
restricted on systems with integrity guarantees (such as Secure Boot)
and, optionally, to avoid self-destructive behaviors.
Add a config option, XMON_RW, to control default xmon behavior along
with kernel cmdline options
Hi Zhen,
On 2019/4/7 20:41, Zhen Lei wrote:
> As Robin Murphy's suggestion:
> "It's also not necessarily obvious to the user how this interacts with
> IOMMU_DEFAULT_PASSTHROUGH, so if we really do go down this route, maybe it
> would be better to refactor the whole lot into a single selection of
On 2019/4/8 9:14, Hanjun Guo wrote:
> Hi Zhen,
>
> On 2019/4/7 20:41, Zhen Lei wrote:
>> As Robin Murphy's suggestion:
>> "It's also not necessarily obvious to the user how this interacts with
>> IOMMU_DEFAULT_PASSTHROUGH, so if we really do go down this route, maybe it
>> would be better to
On 4/7/2019 7:24 AM, Qian Cai wrote:
The commit 4c5d87db4978 ("powerpc/pseries: PAPR persistent memory
support") set a local variable "count" in dlpar_hp_pmem() but never
use it.
arch/powerpc/platforms/pseries/pmem.c: In function 'dlpar_hp_pmem':
arch/powerpc/platforms/pseries/pmem.c:109:6:
On 12/02/2019 00.31, David Gibson wrote:
> On Mon, 11 Feb 2019 12:37:12 +0100
> Thomas Huth wrote:
>
>> Recent versions of QEMU provide a XHCI device by default these
>> days instead of an old-fashioned OHCI device:
>>
>> https://git.qemu.org/?p=qemu.git;a=commitdiff;h=57040d451315320b7d27
>>
On 4/7/2019 8:18 AM, Qian Cai wrote:
The commit b7d6bf4fdd47 ("powerpc/pseries/pci: Remove obsolete SW
invalidate") left 2 variables unused.
arch/powerpc/platforms/pseries/iommu.c: In function 'tce_build_pSeries':
arch/powerpc/platforms/pseries/iommu.c:108:17: warning: variable 'tces'
set but
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