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Test that we can see user namespaces we have CAP_SYS_ADMIN inside of.
This is different from seeing namespaces owned by a user namespace.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-53-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test that CAP_SYS_ADMIN in parent user namespace allows seeing
child user namespace's owned namespaces.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-52-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test permission checking with LISTNS_CURRENT_USER.
Verify that listing with LISTNS_CURRENT_USER respects permissions.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-51-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test that users cannot see namespaces from unrelated user namespaces.
Create two sibling user namespaces, verify they can't see each other's
owned namespaces.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-50-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test that users with CAP_SYS_ADMIN in a user namespace can see
all namespaces owned by that user namespace.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-49-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test that unprivileged users can only see namespaces they're currently
in. Create a namespace, drop privileges, verify we can only see our own
namespaces.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-48-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test error cases for listns().
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-47-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test that hierarchical active reference propagation keeps parent
user namespaces visible in listns().
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-46-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test listns() with multiple namespace types filter.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-45-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test listns() with specific user namespace ID.
Create a user namespace and list namespaces it owns.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-44-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test that listns() only returns active namespaces.
Create a namespace, let it become inactive, verify it's not listed.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-43-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test listns() with LISTNS_CURRENT_USER.
List namespaces owned by current user namespace.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-42-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test listns() pagination.
List namespaces in batches.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-41-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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test listns() with type filtering.
List only network namespaces.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-40-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test basic listns() functionality with the unified namespace tree.
List all active namespaces globally.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-39-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Add a wrapper for the listns() system call.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-38-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test different namespace types (net, uts, ipc) all contributing
active references to the same owning user namespace.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-37-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test that user namespace as a child also propagates correctly.
Create user_A -> user_B, verify when user_B is active that user_A
is also active. This is different from non-user namespace children.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-36-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test that parent stays active as long as ANY child is active.
Create parent user namespace with two child net namespaces.
Parent should remain active until BOTH children are inactive.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-35-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test hierarchical propagation with deep namespace hierarchy.
Create: init_user_ns -> user_A -> user_B -> net_ns
When net_ns is active, both user_A and user_B should be active.
This verifies the conditional recursion in __ns_ref_active_put() works.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-34-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test that different namespace types with same owner all contribute
active references to the owning user namespace.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-33-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test multiple children sharing same parent.
Parent should stay active as long as ANY child is active.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-32-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test multi-level hierarchy (3+ levels deep).
Grandparent → Parent → Child
When child is active, both parent AND grandparent should be active.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-31-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test that bind mounts keep namespaces in the tree even when inactive
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-30-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test hierarchical active reference propagation.
When a child namespace is active, its owning user namespace should also
be active automatically due to hierarchical active reference propagation.
This ensures parents are always reachable when children are active.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-29-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test that an open file descriptor keeps a namespace active.
Even after the creating process exits, the namespace should remain
active as long as an fd is held open.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-28-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test PID namespace active ref tracking
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-27-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test user namespace active ref tracking via credential lifecycle.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-26-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test that a namespace remains active while a process is using it,
even after the creating process exits.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-25-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test namespace lifecycle: create a namespace in a child process, get a
file handle while it's active, then try to reopen after the process
exits (namespace becomes inactive).
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-24-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Test that initial namespaces can be reopened via file handle. Initial
namespaces should always have a ref count of one from boot.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-23-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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This is effectively unused and doesn't really server any purpose after
having reviewed all of the tests that rely on it.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-22-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Ensure all the new uapi bits are visible for the selftests.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-21-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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To pick the changes in:
6606c8c7e8188656 ("bitops: Add __attribute_const__ to generic ffs()-family implementations")
This addresses these tools build warnings:
Warning: Kernel ABI header differences:
diff -u tools/include/asm-generic/bitops/__fls.h include/asm-generic/bitops/__fls.h
diff -u tools/include/asm-generic/bitops/fls.h include/asm-generic/bitops/fls.h
diff -u tools/include/asm-generic/bitops/fls64.h include/asm-generic/bitops/fls64.h
Please see tools/include/uapi/README for further details.
Cc: Kees Cook <kees@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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handle new exit reasons
To pick the changes in:
885df2d2109a60f8 ("KVM: x86: Add support for RDMSR/WRMSRNS w/ immediate on Intel")
c42856af8f70d983 ("KVM: TDX: Add a place holder for handler of TDX hypercalls (TDG.VP.VMCALL)")
That makes 'perf kvm-stat' aware of these new TDCALL and
MSR_{READ,WRITE}_IMM exit reasons, thus addressing the following perf
build warning:
Warning: Kernel ABI header differences:
diff -u tools/arch/x86/include/uapi/asm/vmx.h arch/x86/include/uapi/asm/vmx.h
Please see tools/include/uapi/README for further details.
Cc: Sean Christopherson <seanjc@google.com>
Cc: Xin Li <xin@zytor.com>
Cc: Isaku Yamahata <isaku.yamahata@intel.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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To pick the changes in:
b8c3c9f5d0505905 ("x86/apic: Initialize Secure AVIC APIC backing page")
That triggers:
CC /tmp/build/perf-tools/arch/x86/util/kvm-stat.o
LD /tmp/build/perf-tools/arch/x86/util/perf-util-in.o
LD /tmp/build/perf-tools/arch/x86/perf-util-in.o
LD /tmp/build/perf-tools/arch/perf-util-in.o
LD /tmp/build/perf-tools/perf-util-in.o
AR /tmp/build/perf-tools/libperf-util.a
LINK /tmp/build/perf-tools/perf
But this time causes no changes in tooling results, as the introduced
SVM_VMGEXIT_SAVIC exit reason wasn't added to SVM_EXIT_REASONS, that is
used in kvm-stat.c.
And addresses this perf build warning:
Warning: Kernel ABI header differences:
diff -u tools/arch/x86/include/uapi/asm/svm.h arch/x86/include/uapi/asm/svm.h
Please see tools/include/uapi/README for further details.
Cc: Borislav Petkov (AMD) <bp@alien8.de>
Cc: Neeraj Upadhyay <Neeraj.Upadhyay@amd.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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To pick the changes in:
fddd07626baa419c ("KVM: x86: Define AMD's #HV, #VC, and #SX exception vectors")
f2f5519aa4e3ec4e ("KVM: x86: Define Control Protection Exception (#CP) vector")
9d6812d415358372 ("KVM: x86: Enable guest SSP read/write interface with new uAPIs")
06f2969c6a1237f0 ("KVM: x86: Introduce KVM_{G,S}ET_ONE_REG uAPIs support")
That just rebuilds kvm-stat.c on x86, no change in functionality.
This silences these perf build warning:
Warning: Kernel ABI header differences:
diff -u tools/arch/x86/include/uapi/asm/kvm.h arch/x86/include/uapi/asm/kvm.h
Please see tools/include/uapi/README for further details.
Cc: Sean Christopherson <seanjc@google.com>
Cc: Yang Weijiang <weijiang.yang@intel.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Add a loadable test module that validates CXL address translation
calculations using parameterized test vectors. The module tests both
host-to-device and device-to-host address translations for Modulo and
XOR interleave arithmetic.
Two types of testing are provided:
1. Parameterized test vectors:
Test vectors are passed as module parameters in the format:
"dpa pos r_eiw r_eig hb_ways math expected_spa".
Round-trip validation is performed:
- Translate a DPA and position to a SPA
- Verify the result matches expected SPA
- Translate that SPA back to a DPA and position
- Verify round-trip consistency
2. Internal validation testing:
When no test vectors are provided, the module performs validation
of the translation functions by checking parameter boundaries and
running 10,000 iterations of randomly generated valid parameters
to exercise the core calculation functions.
The module uses the CXL Driver translation functions through symbols
exported exclusively for cxl_translate.
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Alison Schofield <alison.schofield@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
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devm_cxl_port_enumerate_dports() is not longer used after below commit
commit 4f06d81e7c6a ("cxl: Defer dport allocation for switch ports")
Delete it and the relevant interface implemented in cxl_test.
Signed-off-by: Li Ming <ming.li@zohomail.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
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To pick the changes in:
fe2bf6234e947bf5 ("KVM: guest_memfd: Add INIT_SHARED flag, reject user page faults if not set")
d2042d8f96ddefde ("KVM: Rework KVM_CAP_GUEST_MEMFD_MMAP into KVM_CAP_GUEST_MEMFD_FLAGS")
3d3a04fad25a6621 ("KVM: Allow and advertise support for host mmap() on guest_memfd files")
That just rebuilds perf, as these patches don't add any new KVM ioctl to
be harvested for the 'perf trace' ioctl syscall argument beautifiers.
This addresses this perf build warning:
Warning: Kernel ABI header differences:
diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h
Please see tools/include/uapi/README for further details.
Cc: Sean Christopherson <seanjc@google.com>
Cc: Fuad Tabba <tabba@google.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Refactor ublk_thread to be a thread-local variable instead of storing
it in ublk_dev:
- Remove pthread_t thread field from struct ublk_thread and move it to
struct ublk_thread_info
- Remove struct ublk_thread array from struct ublk_dev, reducing memory
footprint
- Define struct ublk_thread as local variable in __ublk_io_handler_fn()
instead of accessing it from dev->threads[]
- Extract main IO handling logic into __ublk_io_handler_fn() which is
marked as noinline
- Move CPU affinity setup to ublk_io_handler_fn() before calling
__ublk_io_handler_fn()
- Update ublk_thread_set_sched_affinity() to take struct ublk_thread_info *
instead of struct ublk_thread *, and use pthread_setaffinity_np()
instead of sched_setaffinity()
- Reorder struct ublk_thread fields to group related state together
This change makes each thread's ublk_thread structure truly local to
the thread, improving cache locality and reducing memory usage.
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Move ublk_thread_set_sched_affinity() call before ublk_thread_init()
to ensure memory allocations during thread initialization occur on
the correct NUMA node. This leverages Linux's first-touch memory
policy for better NUMA locality.
Also convert ublk_thread_set_sched_affinity() to use
pthread_setaffinity_np() instead of sched_setaffinity(), as the
pthread API is the proper interface for setting thread affinity in
multithreaded programs.
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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DRM_IOCTL_GEM_CHANGE_HANDLE
Picking the changes from:
0864197382fa7c8c ("drm: Move drm_gem ioctl kerneldoc to uapi file")
53096728b8910c69 ("drm: Add DRM prime interface to reassign GEM handle")
Addressing these perf build warnings:
Warning: Kernel ABI header differences:
Now 'perf trace' and other code that might use the tools/perf/trace/beauty
autogenerated tables will be able to translate this new ioctl command into
a string:
$ tools/perf/trace/beauty/drm_ioctl.sh > before
$ cp include/uapi/drm/drm.h tools/include/uapi/drm/drm.h
$ tools/perf/trace/beauty/drm_ioctl.sh > after
$ diff -u before after
--- before 2025-11-03 09:57:34.832553174 -0300
+++ after 2025-11-03 09:57:47.969409428 -0300
@@ -111,6 +111,7 @@
[0xCF] = "SYNCOBJ_EVENTFD",
[0xD0] = "MODE_CLOSEFB",
[0xD1] = "SET_CLIENT_NAME",
+ [0xD2] = "GEM_CHANGE_HANDLE",
[DRM_COMMAND_BASE + 0x00] = "I915_INIT",
[DRM_COMMAND_BASE + 0x01] = "I915_FLUSH",
[DRM_COMMAND_BASE + 0x02] = "I915_FLIP",
$
Please see tools/include/uapi/README for further details.
Cc: Christian König <christian.koenig@amd.com>
Cc: David Francis <David.Francis@amd.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Along the code reorganizations, the file has been keeping the original
comments about argv and envp which are no longer relevant to this file
anymore. Let's just drop them.
Acked-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>
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The efforts we go through by installing a single arch are counter
productive when the base directory already supports them all, and
the arch-specific files are really small. Let's make the "headers"
target simply install headers for all supported archs and stop
trying to build a hybrid "arch.h" file on the fly, to instead keep
the generic one. Now the same nolibc headers installation will be
usable with any arch-specific uapi installation.
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
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It's often recommended to only use inttypes.h instead of stdint.h for
portability reasons since the former is always present when the latter
is present, but not conversely, and the former includes the latter. Due
to this some simple programs fail to build when including inttypes.h.
Let's add one that simply includes nolibc.h to better support these
programs.
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
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Modern programs tend to include sys/select.h to get FD_SET() and
FD_CLR() definitions as well as struct fd_set, but in our case it
didn't exist.
The definitions were moved from types.h to sys/select.h, which is
now included from nolibc.h, and the sys_select() definition moved
there as well from sys.h.
Signed-off-by: Willy Tarreau <w@1wt.eu>
[Thomas: adapt to current -next branch]
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
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Surprisingly we forgot to add this common one. It was added with a
per-arch guard allowing to later implement it in arch-specific asm
code like was done for a few other ones.
The test verifies that we don't search past the indicated length.
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
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The help message says the headers are going to be installed into
tools/include/nolibc but this is only the default if $OUTPUT is not set,
so better clarify this (the current value of $OUTPUT is already shown).
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
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To pick the changes from:
e19c06219985f2be ("x86/cpufeatures: Add support for Assignable Bandwidth Monitoring Counters (ABMC)")
7b59c73fd611eae8 ("x86/cpufeatures: Add SNP Secure TSC")
3c7cb84145336721 ("x86/cpufeatures: Add a CPU feature bit for MSR immediate form instructions")
2f8f173413f1cbf5 ("x86/vmscape: Add conditional IBPB mitigation")
a508cec6e5215a3f ("x86/vmscape: Enumerate VMSCAPE bug")
This causes these perf files to be rebuilt and brings some X86_FEATURE
that may be used by:
CC /tmp/build/perf/bench/mem-memcpy-x86-64-asm.o
CC /tmp/build/perf/bench/mem-memset-x86-64-asm.o
And addresses this perf build warning:
Warning: Kernel ABI header differences:
diff -u tools/arch/x86/include/asm/cpufeatures.h arch/x86/include/asm/cpufeatures.h
Please see tools/include/uapi/README for further details.
Cc: Babu Moger <babu.moger@amd.com>
Cc: Borislav Petkov (AMD) <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Nikunj A Dadhania <nikunj@amd.com>
Cc: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Xin Li <xin@zytor.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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