On Thu, 9 Nov 2023, Maciej Wieczor-Retman wrote:
> Non-contiguous CBM support for Intel CAT has been merged into the kernel
> with Commit 0e3cd31f6e90 ("x86/resctrl: Enable non-contiguous CBMs in
> Intel CAT") but there is no selftest that would validate if this feature
> works correctly.
>
> The
Nested translation is a hardware feature that is supported by many modern
IOMMU hardwares. It has two stages (stage-1, stage-2) address translation
to get access to the physical address. stage-1 translation table is owned
by userspace (e.g. by a guest OS), while stage-2 is owned by kernel. Changes
From: Lu Baolu
The updates of the PTEs in the nested page table will be propagated to the
hardware caches on both IOMMU (IOTLB) and devices (DevTLB/ATC).
Add a new domain op cache_invalidate_user for the userspace to flush the
hardware caches for a nested domain through iommufd. No wrapper for i
In nested translation, the stage-1 page table is user-managed but cached
by the IOMMU hardware, so an update on present page table entries in the
stage-1 page table should be followed with a cache invalidation.
Add an IOMMU_HWPT_INVALIDATE ioctl to support such a cache invalidation.
It takes hwpt_
From: Nicolin Chen
Wrap up the data type/pointer/num sanity and __iommu_copy_struct_from_user
call for iommu drivers to copy driver specific data at a specific location
in the struct iommu_user_data_array.
And expect it to be used in cache_invalidate_user ops for example.
Signed-off-by: Nicolin
From: Nicolin Chen
Add mock_domain_cache_invalidate_user() data structure to support user
space selftest program to cover user cache invalidation pathway.
Signed-off-by: Nicolin Chen
Signed-off-by: Yi Liu
---
drivers/iommu/iommufd/iommufd_test.h | 17 +++
drivers/iommu/iommufd/selftes
From: Nicolin Chen
Allow to test whether IOTLB has been invalidated or not.
Signed-off-by: Nicolin Chen
Signed-off-by: Yi Liu
---
drivers/iommu/iommufd/iommufd_test.h | 5
drivers/iommu/iommufd/selftest.c | 26 +++
tools/testing/selftests/iommu/iomm
From: Nicolin Chen
Add test cases for the IOMMU_HWPT_INVALIDATE ioctl and verify it by using
the new IOMMU_TEST_OP_MD_CHECK_IOTLB.
Signed-off-by: Nicolin Chen
Signed-off-by: Yi Liu
---
tools/testing/selftests/iommu/iommufd.c | 71 +++
tools/testing/selftests/iommu/iommuf
This is the second part to add Intel VT-d nested translation based on IOMMUFD
nesting infrastructure. As the iommufd nesting infrastructure series [1],
iommu core supports new ops to invalidate the cache after the modifictions
in stage-1 page table. So far, the cache invalidation data is vendor spe
This makes the helpers visible to nested.c.
Reviewed-by: Kevin Tian
Signed-off-by: Yi Liu
---
drivers/iommu/intel/iommu.c | 10 +-
drivers/iommu/intel/iommu.h | 6 ++
2 files changed, 11 insertions(+), 5 deletions(-)
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/i
This adds the data structure for flushing iotlb for the nested domain
allocated with IOMMU_HWPT_DATA_VTD_S1 type.
This only supports invalidating IOTLB, but no for device-TLB as device-TLB
invalidation will be covered automatically in the IOTLB invalidation if the
underlying IOMMU driver has enabl
This implements the .cache_invalidate_user() callback to support iotlb
flush for nested domain.
Signed-off-by: Lu Baolu
Signed-off-by: Yi Liu
---
drivers/iommu/intel/nested.c | 54
1 file changed, 54 insertions(+)
diff --git a/drivers/iommu/intel/nested.c b
+ linux-kselftest ML, Shuah Khan
On Wed, Nov 15, 2023 at 01:17:23PM +0100, Petr Machata wrote:
> From: Ido Schimmel
>
> Test that PCI reset works correctly by verifying that only the expected
> reset methods are supported and that after issuing the reset the ifindex
> of the port changes.
>
> S
conntrack zones are heavily used by tools like openvswitch to run
multiple virtual "routers" on a single machine. In this context each
conntrack zone matches to a single router, thereby preventing
overlapping IPs from becoming issues.
In these systems it is common to operate on all conntrack entrie
On Thu, Nov 16, 2023 at 4:57 PM Chris Li wrote:
>
> Hi Nhat,
>
> I want want to share the high level feedback we discussed here in the
> mailing list as well.
>
> It is my observation that each memcg LRU list can't compare the page
> time order with other memcg.
> It works great when the leaf leve
On Fri, Nov 17, 2023 at 8:23 AM Nhat Pham wrote:
>
> On Thu, Nov 16, 2023 at 4:57 PM Chris Li wrote:
> >
> > Hi Nhat,
> >
> > I want want to share the high level feedback we discussed here in the
> > mailing list as well.
> >
> > It is my observation that each memcg LRU list can't compare the pag
On Wed, Nov 15, 2023 at 10:14 PM Yuran Pereira
wrote:
>
> Multiple files/programs in `tools/testing/selftests/bpf/prog_tests/` still
> heavily use the `CHECK` macro, even when better `ASSERT_` alternatives are
> available.
>
> As it was already pointed out by Yonghong Song [1] in the bpf selftests
On Thu, 2023-11-16 at 18:41 +, Mark Brown wrote:
> > What about a CLONE_NEW_SHSTK for clone3 that forces a new shadow
> > stack?
> > So keep the existing logic, but the new flag can override the logic
> > for
> > !CLONE_VM and CLONE_VFORK if the caller wants. The behavior of
> > shadow_stack_si
On Tue, 2023-11-14 at 15:11 -0800, Rick Edgecombe wrote:
> The other tests passed in both cases. I'm going to dig into the other
> parts now but can circle back if it's not obvious what's going on
> there.
Finally got back to this. I think it's just a problem with the shadow
stack detection logic
Hello Andrii,
On Fri, Nov 17, 2023 at 12:18:40PM -0500, Andrii Nakryiko wrote:
>
> It seems like you introduced a few failures in selftests, please take
> a look at [0] and fix them, thanks!
>
Thank you for letting me know. I will see what's wrong
and submit a v2 ASAP.
Thanks,
Yuran Pereira
On Tue, Nov 14, 2023 at 08:05:55PM +, Mark Brown wrote:
Unlike with the normal stack there is no API for configuring the the shadow
stack for a new thread, instead the kernel will dynamically allocate a new
shadow stack with the same size as the normal stack. This appears to be due
to the sha
On Tue, Nov 14, 2023 at 11:11:58PM +, Edgecombe, Rick P wrote:
On Tue, 2023-11-14 at 20:05 +, Mark Brown wrote:
+static void test_shadow_stack_supported(void)
+{
+ long shadow_stack;
+
+ shadow_stack = syscall(__NR_map_shadow_stack, 0,
getpagesize(), 0);
Hmm, x86 fails thi
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