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Use input constraints to load RAX and RBX when testing that KVM correctly
does/doesn't patch the "wrong" hypercall. There's no need to manually
load RAX and RBX, and no reason to clobber them either (KVM is not
supposed to modify anything other than RAX).
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Message-Id: <20220928233652.783504-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Directly compare the expected versus observed hypercall instructions when
verifying that KVM patched in the native hypercall (FIX_HYPERCALL_INSN
quirk enabled). gcc rightly complains that doing a 4-byte memcpy() with
an "unsigned char" as the source generates an out-of-bounds accesses.
Alternatively, "exp" and "obs" could be declared as 3-byte arrays, but
there's no known reason to copy locally instead of comparing directly.
In function ‘assert_hypercall_insn’,
inlined from ‘guest_main’ at x86_64/fix_hypercall_test.c:91:2:
x86_64/fix_hypercall_test.c:63:9: error: array subscript ‘unsigned int[0]’
is partly outside array bounds of ‘unsigned char[1]’ [-Werror=array-bounds]
63 | memcpy(&exp, exp_insn, sizeof(exp));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
x86_64/fix_hypercall_test.c: In function ‘guest_main’:
x86_64/fix_hypercall_test.c:42:22: note: object ‘vmx_hypercall_insn’ of size 1
42 | extern unsigned char vmx_hypercall_insn;
| ^~~~~~~~~~~~~~~~~~
x86_64/fix_hypercall_test.c:25:22: note: object ‘svm_hypercall_insn’ of size 1
25 | extern unsigned char svm_hypercall_insn;
| ^~~~~~~~~~~~~~~~~~
In function ‘assert_hypercall_insn’,
inlined from ‘guest_main’ at x86_64/fix_hypercall_test.c:91:2:
x86_64/fix_hypercall_test.c:64:9: error: array subscript ‘unsigned int[0]’
is partly outside array bounds of ‘unsigned char[1]’ [-Werror=array-bounds]
64 | memcpy(&obs, obs_insn, sizeof(obs));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
x86_64/fix_hypercall_test.c: In function ‘guest_main’:
x86_64/fix_hypercall_test.c:25:22: note: object ‘svm_hypercall_insn’ of size 1
25 | extern unsigned char svm_hypercall_insn;
| ^~~~~~~~~~~~~~~~~~
x86_64/fix_hypercall_test.c:42:22: note: object ‘vmx_hypercall_insn’ of size 1
42 | extern unsigned char vmx_hypercall_insn;
| ^~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make: *** [../lib.mk:135: tools/testing/selftests/kvm/x86_64/fix_hypercall_test] Error 1
Fixes: 6c2fa8b20d0c ("selftests: KVM: Test KVM_X86_QUIRK_FIX_HYPERCALL_INSN")
Cc: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Message-Id: <20220928233652.783504-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Implement memcmp(), memcpy(), and memset() to override the compiler's
built-in versions in order to guarantee that the compiler won't generate
out-of-line calls to external functions via the PLT. This allows the
helpers to be safely used in guest code, as KVM selftests don't support
dynamic loading of guest code.
Steal the implementations from the kernel's generic versions, sans the
optimizations in memcmp() for unaligned accesses.
Put the utilities in a separate compilation unit and build with
-ffreestanding to fudge around a gcc "feature" where it will optimize
memset(), memcpy(), etc... by generating a recursive call. I.e. the
compiler optimizes itself into infinite recursion. Alternatively, the
individual functions could be tagged with
optimize("no-tree-loop-distribute-patterns"), but using "optimize" for
anything but debug is discouraged, and Linus NAK'd the use of the flag
in the kernel proper[*].
https://lore.kernel.org/lkml/CAHk-=wik-oXnUpfZ6Hw37uLykc-_P0Apyn2XuX-odh-3Nzop8w@mail.gmail.com
Cc: Andrew Jones <andrew.jones@linux.dev>
Cc: Anup Patel <anup@brainfault.org>
Cc: Atish Patra <atishp@atishpatra.org>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Janosch Frank <frankja@linux.ibm.com>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220928233652.783504-2-seanjc@google.com>
Reviewed-by: Andrew Jones <andrew.jones@linux.dev>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Bail out of test_dump_stack() if the stack trace is empty rather than
invoking addr2line with zero addresses. The problem with the latter is
that addr2line will block waiting for addresses to be passed in via
stdin, e.g. if running a selftest from an interactive terminal.
Opportunistically fix up the comment that mentions skipping 3 frames
since only 2 are skipped in the code.
Cc: Vipin Sharma <vipinsh@google.com>
Cc: Sean Christopherson <seanjc@google.com>
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20220922231724.3560211-1-dmatlack@google.com>
[Small tweak to keep backtrace() call close to if(). - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Page_idle uses {ptep/pmdp}_clear_young_notify which in turn calls
the mmu notifier callback ->clear_young(), which purposefully
does not flush the TLB.
When running the test in a nested guest, point 1. of the test
doc header is violated, because KVM TLB is unbounded by size
and since no flush is forced, KVM does not update the sptes
accessed/idle bits resulting in guest assertion failure.
More precisely, only the first ACCESS_WRITE in run_test() actually
makes visible changes, because sptes are created and the accessed
bit is set to 1 (or idle bit is 0). Then the first mark_memory_idle()
passes since access bit is still one, and sets all pages as idle
(or not accessed). When the next write is performed, the update
is not flushed therefore idle is still 1 and next mark_memory_idle()
fails.
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20220926082923.299554-1-eesposit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* for-next/kselftest: (28 commits)
: Kselftest updates for arm64
kselftest/arm64: Handle EINTR while reading data from children
kselftest/arm64: Flag fp-stress as exiting when we begin finishing up
kselftest/arm64: Don't repeat termination handler for fp-stress
kselftest/arm64: Don't enable v8.5 for MTE selftest builds
kselftest/arm64: Fix typo in hwcap check
kselftest/arm64: Add hwcap test for RNG
kselftest/arm64: Add SVE 2 to the tested hwcaps
kselftest/arm64: Add missing newline in hwcap output
kselftest/arm64: Fix spelling misakes of signal names
kselftest/arm64: Enforce actual ABI for SVE syscalls
kselftest/arm64: Correct buffer allocation for SVE Z registers
kselftest/arm64: Include larger SVE and SME VLs in signal tests
kselftest/arm64: Allow larger buffers in get_signal_context()
kselftest/arm64: Preserve any EXTRA_CONTEXT in handle_signal_copyctx()
kselftest/arm64: Validate contents of EXTRA_CONTEXT blocks
kselftest/arm64: Only validate each signal context once
kselftest/arm64: Remove unneeded protype for validate_extra_context()
kselftest/arm64: Fix validation of EXTRA_CONTEXT signal context location
kselftest/arm64: Fix validatation termination record after EXTRA_CONTEXT
kselftest/arm64: Validate signal ucontext in place
...
Currently we treat any error when reading from the child as a failure and
don't read any more output from that child as a result. This ignores the
fact that it is valid for read() to return EINTR as the error code if there
is a signal pending so we could stop handling the output of children,
especially during exit when we will get some SIGCHLD signals delivered to
us. Fix this by pulling the read handling out into a separate function
which returns a flag if reads should be continued and wrapping it in a
loop.
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220921181345.618085-4-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Once we have started exiting the termination handler will have the same
effect as what we're already running so set the termination flag at that
point.
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220921181345.618085-3-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
When fp-stress gets a termination signal it sets a flag telling itself to
exit and sends a termination signal to all the children. If the flag is set
then don't bother repeating this process, it isn't going to accomplish
anything other than consume CPU time which can be an issue when running in
emulation.
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220921181345.618085-2-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Currently we set -march=armv8.5+memtag when building the MTE selftests,
allowing the compiler to emit v8.5 and MTE instructions for anything it
generates. This means that we may get code that will generate SIGILLs when
run on older systems rather than skipping on non-MTE systems as should be
the case. Most toolchains don't select any incompatible instructions but
I have seen some reports which suggest that some may be appearing which do
so. This is also potentially problematic in that if the compiler chooses to
emit any MTE instructions for the C code it may interfere with the MTE
usage we are trying to test.
Since the only reason we are specifying this option is to allow us to
assemble MTE instructions in mte_helper.S we can avoid these issues by
moving to using a .arch directive there and adding the -march explicitly to
the toolchain support check instead of the generic CFLAGS.
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220928154517.173108-1-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This patch changes the bpf_dctcp test to ensure the recurred
bpf_setsockopt(TCP_CONGESTION) returns -EBUSY.
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://lore.kernel.org/r/20220929070407.965581-6-martin.lau@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
User processes may require many events and when they do the cache
performance of a byte index status check is less ideal than a bit index.
The previous event limit per-page was 4096, the new limit is 32,768.
This change adds a bitwise index to the user_reg struct. Programs check
that the bit at status_bit has a bit set within the status page(s).
Link: https://lkml.kernel.org/r/20220728233309.1896-6-beaub@linux.microsoft.com
Link: https://lore.kernel.org/all/2059213643.196683.1648499088753.JavaMail.zimbra@efficios.com/
Suggested-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Beau Belgrave <beaub@linux.microsoft.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Pick KVM_CAP_DIRTY_LOG_RING_ACQ_REL if exposed by the kernel.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Link: https://lore.kernel.org/r/20220926145120.27974-7-maz@kernel.org
In order to preserve ordering, make sure that the flag accesses
in the dirty log are done using acquire/release accessors.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Link: https://lore.kernel.org/r/20220926145120.27974-6-maz@kernel.org
Test iterators of vma, files and tasks.
Ensure the API works appropriately to visit all tasks,
tasks in a process, or a particular task.
Signed-off-by: Kui-Feng Lee <kuifeng@fb.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Acked-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://lore.kernel.org/bpf/20220926184957.208194-5-kuifeng@fb.com
Bits 27 through 31 in Hyper-V hypercall 'control' are reserved (see
HV_HYPERCALL_RSVD0_MASK) but '0xdeadbeef' includes them. This causes
KVM to return HV_STATUS_INVALID_HYPERCALL_INPUT instead of the expected
HV_STATUS_INVALID_HYPERCALL_CODE.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Link: https://lore.kernel.org/all/87fsgjol20.fsf@redhat.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Load RAX with -EFAULT prior to making a Hyper-V hypercall so that tests
can't get false negatives due to the compiler coincidentally loading the
"right" value into RAX, i.e. to ensure that _KVM_ and not the compiler
is correctly clearing RAX on a successful hypercall.
Note, initializing *hv_status (in C code) to -EFAULT is not sufficient
to avoid false negatives, as the compiler can still "clobber" RAX and
thus load garbage into *hv_status if the hypercall faults (or if KVM
doesn't set RAX).
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Vipin Sharma <vipinsh@google.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Link: https://lore.kernel.org/r/20220922062451.2927010-1-vipinsh@google.com
[sean: move to separate patch, massage changelog]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Commit cc5851c6be86 ("KVM: selftests: Use exception fixup for #UD/#GP
Hyper-V MSR/hcall tests") introduced a wrong guest assert in guest_hcall().
It is not checking the successful hypercall results and only checks the
result when a fault happens.
GUEST_ASSERT_2(!hcall->ud_expected || res == hcall->expect,
hcall->expect, res);
Correct the assertion by only checking results of the successful
hypercalls.
This issue was observed when this test started failing after building it
in Clang. Above guest assert statement fails because "res" is not equal
to "hcall->expect" when "hcall->ud_expected" is true. "res" gets some
garbage value in Clang from the RAX register. In GCC, RAX is 0 because
it using RAX for @output_address in the asm statement and resetting it
to 0 before using it as output operand in the same asm statement. Clang
is not using RAX for @output_address.
Fixes: cc5851c6be86 ("KVM: selftests: Use exception fixup for #UD/#GP Hyper-V MSR/hcall tests")
Signed-off-by: Vipin Sharma <vipinsh@google.com>
Suggested-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Link: https://lore.kernel.org/r/20220922062451.2927010-1-vipinsh@google.com
[sean: wrap changelog at ~75 chars, move -EFAULT change to separate patch]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Fix the comment to accurately describe the test and recently added
SYSTEM_SUSPEND test case.
What was once psci_cpu_on_test was renamed and extended to squeeze in a
test case for PSCI SYSTEM_SUSPEND. Nonetheless, the author of those
changes (whoever they may be...) failed to update the file comment to
reflect what had changed.
Reported-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220819162100.213854-1-oliver.upton@linux.dev
For PERF_SAMPLE_BRANCH_STACK sample type, different branch_sample_type,
ie branch filters are supported. The testcase "bhrb_filter_map_test"
tests the valid and invalid filter maps in different powerpc platforms.
Update this testcase to include scenario to cover multiple branch
filters at sametime. Since powerpc doesn't support multiple filters at
sametime, expect failure during perf_event_open.
Reported-by: Disha Goel <disgoel@linux.vnet.ibm.com>
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Reviewed-by: Kajol Jain <kjain@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220921145255.20972-3-atrajeev@linux.vnet.ibm.com
Test 84a0: Create TEQL with default setting
Test 7734: Create TEQL with multiple device
Test 34a9: Delete TEQL with valid handle
Test 6289: Show TEQL stats
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Test 6430: Create TBF with default setting
Test 0518: Create TBF with mtu setting
Test 320a: Create TBF with peakrate setting
Test 239b: Create TBF with latency setting
Test c975: Create TBF with overhead setting
Test 948c: Create TBF with linklayer setting
Test 3549: Replace TBF with mtu
Test f948: Change TBF with latency time
Test 2348: Show TBF class
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Test ba39: Add taprio Qdisc to multi-queue device (8 queues)
Test 9462: Add taprio Qdisc with multiple sched-entry
Test 8d92: Add taprio Qdisc with txtime-delay
Test d092: Delete taprio Qdisc with valid handle
Test 8471: Show taprio class
Test 0a85: Add taprio Qdisc to single-queue device
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Test 283e: Create skbprio with default setting
Test c086: Create skbprio with limit setting
Test 6733: Change skbprio with limit setting
Test 2958: Show skbprio class
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Test 7482: Create SFQ with default setting
Test c186: Create SFQ with limit setting
Test ae23: Create SFQ with perturb setting
Test a430: Create SFQ with quantum setting
Test 4539: Create SFQ with divisor setting
Test b089: Create SFQ with flows setting
Test 99a0: Create SFQ with depth setting
Test 7389: Create SFQ with headdrop setting
Test 6472: Create SFQ with redflowlimit setting
Test 8929: Show SFQ class
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Test 3294: Create SFB with default setting
Test 430a: Create SFB with rehash setting
Test 3410: Create SFB with db setting
Test 49a0: Create SFB with limit setting
Test 1241: Create SFB with max setting
Test 3249: Create SFB with target setting
Test 30a9: Create SFB with increment setting
Test 239a: Create SFB with decrement setting
Test 9301: Create SFB with penalty_rate setting
Test 2a01: Create SFB with penalty_burst setting
Test 3209: Change SFB with rehash setting
Test 5447: Show SFB class
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Test 3289: Create PLUG with default setting
Test 0917: Create PLUG with block setting
Test 483b: Create PLUG with release setting
Test 4995: Create PLUG with release_indefinite setting
Test 389c: Create PLUG with limit setting
Test 384a: Delete PLUG with valid handle
Test 439a: Replace PLUG with limit setting
Test 9831: Change PLUG with limit setting
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Test 900c: Create pfifo_fast with default setting
Test 7470: Dump pfifo_fast stats
Test b974: Replace pfifo_fast with different handle
Test 3240: Delete pfifo_fast with valid handle
Test 4385: Delete pfifo_fast with invalid handle
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Test 4812: Create HHF with default setting
Test 8a92: Create HHF with limit setting
Test 3491: Create HHF with quantum setting
Test ba04: Create HHF with reset_timeout setting
Test 4238: Create HHF with admit_bytes setting
Test 839f: Create HHF with evict_timeout setting
Test a044: Create HHF with non_hh_weight setting
Test 32f9: Change HHF with limit setting
Test 385e: Show HHF class
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Test 8942: Create GRED with default setting
Test 5783: Create GRED with grio setting
Test 8a09: Create GRED with limit setting
Test 48cb: Create GRED with ecn setting
Test 763a: Change GRED setting
Test 8309: Show GRED class
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Test 983b: Create FQ with default setting
Test 38a1: Create FQ with limit packet setting
Test 0a18: Create FQ with flow_limit setting
Test 2390: Create FQ with quantum setting
Test 845b: Create FQ with initial_quantum setting
Test 9398: Create FQ with maxrate setting
Test 342c: Create FQ with nopacing setting
Test 6391: Create FQ with refill_delay setting
Test 238b: Create FQ with low_rate_threshold setting
Test 7582: Create FQ with orphan_mask setting
Test 4894: Create FQ with timer_slack setting
Test 324c: Create FQ with ce_threshold setting
Test 424a: Create FQ with horizon time setting
Test 89e1: Create FQ with horizon_cap setting
Test 32e1: Delete FQ with valid handle
Test 49b0: Replace FQ with limit setting
Test 9478: Change FQ with limit setting
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Test 34ba: Create ETF with default setting
Test 438f: Create ETF with delta nanos setting
Test 9041: Create ETF with deadline_mode setting
Test 9a0c: Create ETF with skip_sock_check setting
Test 2093: Delete ETF with valid handle
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Test 983a: Create CODEL with default setting
Test 38aa: Create CODEL with limit packet setting
Test 9178: Create CODEL with target setting
Test 78d1: Create CODEL with interval setting
Test 238a: Create CODEL with ecn setting
Test 939c: Create CODEL with ce_threshold setting
Test 8380: Delete CODEL with valid handle
Test 289c: Replace CODEL with limit setting
Test 0648: Change CODEL with limit setting
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Test 8937: Create CHOKE with default setting
Test 48c0: Create CHOKE with min packet setting
Test 38c1: Create CHOKE with max packet setting
Test 234a: Create CHOKE with ecn setting
Test 4380: Create CHOKE with burst setting
Test 48c7: Delete CHOKE with valid handle
Test 4398: Replace CHOKE with min setting
Test 0301: Change CHOKE with limit setting
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Test 7628: Create ATM with default setting
Test 390a: Delete ATM with valid handle
Test 32a0: Show ATM class
Test 6310: Dump ATM stats
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Since the tests are run in a function $@ there actually contains the
function arguments, not the script ones.
Pass "$@" to the function as well.
Fixes: 272d1f4cfa3c ("selftests: bpf: test_kmod.sh: Pass parameters to the module")
Signed-off-by: Yauheni Kaliuta <ykaliuta@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220926092320.564631-1-ykaliuta@redhat.com
