linux-toradex.git/tools/include/uapi/linux, branch v5.19-rc7

tools headers UAPI: Sync linux/kvm.h with the kernel sources

2022-07-17T13:14:07+00:00

To pick the changes in:

  1b870fa5573e260b ("kvm: stats: tell userspace which values are boolean")

That just rebuilds perf, as these patches don't add any new KVM ioctl to
be harvested for the the 'perf trace' ioctl syscall argument
beautifiers.

This is also by now used by tools/testing/selftests/kvm/, a simple test
build succeeded.

This silences this perf build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/kvm.h' differs from latest version at 'include/uapi/linux/kvm.h'
  diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h

Cc: Adrian Hunter 
Cc: Ian Rogers 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Paolo Bonzini 
Link: http://lore.kernel.org/lkml/YtQLDvQrBhJNl3n5@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

2022-07-08T22:24:16+00:00

Daniel Borkmann says:

====================
bpf 2022-07-08

We've added 3 non-merge commits during the last 2 day(s) which contain
a total of 7 files changed, 40 insertions(+), 24 deletions(-).

The main changes are:

1) Fix cBPF splat triggered by skb not having a mac header, from Eric Dumazet.

2) Fix spurious packet loss in generic XDP when pushing packets out (note
   that native XDP is not affected by the issue), from Johan Almbladh.

3) Fix bpf_dynptr_{read,write}() helper signatures with flag argument before
   its set in stone as UAPI, from Joanne Koong.

* https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
  bpf: Add flags arg to bpf_dynptr_read and bpf_dynptr_write APIs
  bpf: Make sure mac_header was set before using it
  xdp: Fix spurious packet loss in generic XDP TX path
====================

Link: https://lore.kernel.org/r/20220708213418.19626-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski

bpf: Add flags arg to bpf_dynptr_read and bpf_dynptr_write APIs

2022-07-08T08:55:53+00:00

Commit 13bbbfbea759 ("bpf: Add bpf_dynptr_read and bpf_dynptr_write")
added the bpf_dynptr_write() and bpf_dynptr_read() APIs.

However, it will be needed for some dynptr types to pass in flags as
well (e.g. when writing to a skb, the user may like to invalidate the
hash or recompute the checksum).

This patch adds a "u64 flags" arg to the bpf_dynptr_read() and
bpf_dynptr_write() APIs before their UAPI signature freezes where
we then cannot change them anymore with a 5.19.x released kernel.

Fixes: 13bbbfbea759 ("bpf: Add bpf_dynptr_read and bpf_dynptr_write")
Signed-off-by: Joanne Koong 
Signed-off-by: Alexei Starovoitov 
Signed-off-by: Daniel Borkmann 
Link: https://lore.kernel.org/r/20220706232547.4016651-1-joannelkoong@gmail.com

tools headers UAPI: Sync linux/kvm.h with the kernel sources

2022-06-28T17:20:22+00:00

To pick the changes in:

  bfbab44568779e16 ("KVM: arm64: Implement PSCI SYSTEM_SUSPEND")
  7b33a09d036ffd9a ("KVM: arm64: Add support for userspace to suspend a vCPU")
  ffbb61d09fc56c85 ("KVM: x86: Accept KVM_[GS]ET_TSC_KHZ as a VM ioctl.")
  661a20fab7d156cf ("KVM: x86/xen: Advertise and document KVM_XEN_HVM_CONFIG_EVTCHN_SEND")
  fde0451be8fb3208 ("KVM: x86/xen: Support per-vCPU event channel upcall via local APIC")
  28d1629f751c4a5f ("KVM: x86/xen: Kernel acceleration for XENVER_version")
  536395260582be74 ("KVM: x86/xen: handle PV timers oneshot mode")
  942c2490c23f2800 ("KVM: x86/xen: Add KVM_XEN_VCPU_ATTR_TYPE_VCPU_ID")
  2fd6df2f2b47d430 ("KVM: x86/xen: intercept EVTCHNOP_send from guests")
  35025735a79eaa89 ("KVM: x86/xen: Support direct injection of event channel events")

That automatically adds support for this new ioctl:

  $ tools/perf/trace/beauty/kvm_ioctl.sh > before
  $ cp include/uapi/linux/kvm.h tools/include/uapi/linux/kvm.h
  $ tools/perf/trace/beauty/kvm_ioctl.sh > after
  $ diff -u before after
  --- before	2022-06-28 12:13:07.281150509 -0300
  +++ after	2022-06-28 12:13:16.423392896 -0300
  @@ -98,6 +98,7 @@
   	[0xcc] = "GET_SREGS2",
   	[0xcd] = "SET_SREGS2",
   	[0xce] = "GET_STATS_FD",
  +	[0xd0] = "XEN_HVM_EVTCHN_SEND",
   	[0xe0] = "CREATE_DEVICE",
   	[0xe1] = "SET_DEVICE_ATTR",
   	[0xe2] = "GET_DEVICE_ATTR",
  $

This silences these perf build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/kvm.h' differs from latest version at 'include/uapi/linux/kvm.h'
  diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h

Cc: Adrian Hunter 
Cc: David Woodhouse 
Cc: Ian Rogers 
Cc: Jiri Olsa 
Cc: Joao Martins 
Cc: Marc Zyngier 
Cc: Namhyung Kim 
Cc: Oliver Upton 
Cc: Paolo Bonzini 
Link: http://lore.kernel.org/lkml/Yrs4RE+qfgTaWdAt@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

tools include UAPI: Sync linux/vhost.h with the kernel sources

2022-06-26T15:32:55+00:00

To get the changes in:

  84d7c8fd3aade2fe ("vhost-vdpa: introduce uAPI to set group ASID")
  2d1fcb7758e49fd9 ("vhost-vdpa: uAPI to get virtqueue group id")
  a0c95f201170bd55 ("vhost-vdpa: introduce uAPI to get the number of address spaces")
  3ace88bd37436abc ("vhost-vdpa: introduce uAPI to get the number of virtqueue groups")
  175d493c3c3e09a3 ("vhost: move the backend feature bits to vhost_types.h")

Silencing this perf build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/vhost.h' differs from latest version at 'include/uapi/linux/vhost.h'
  diff -u tools/include/uapi/linux/vhost.h include/uapi/linux/vhost.h

To pick up these changes and support them:

  $ tools/perf/trace/beauty/vhost_virtio_ioctl.sh > before
  $ cp include/uapi/linux/vhost.h tools/include/uapi/linux/vhost.h
  $ tools/perf/trace/beauty/vhost_virtio_ioctl.sh > after
  $ diff -u before after
  --- before	2022-06-26 12:04:35.982003781 -0300
  +++ after	2022-06-26 12:04:43.819972476 -0300
  @@ -28,6 +28,7 @@
   	[0x74] = "VDPA_SET_CONFIG",
   	[0x75] = "VDPA_SET_VRING_ENABLE",
   	[0x77] = "VDPA_SET_CONFIG_CALL",
  +	[0x7C] = "VDPA_SET_GROUP_ASID",
   };
   static const char *vhost_virtio_ioctl_read_cmds[] = {
   	[0x00] = "GET_FEATURES",
  @@ -39,5 +40,8 @@
   	[0x76] = "VDPA_GET_VRING_NUM",
   	[0x78] = "VDPA_GET_IOVA_RANGE",
   	[0x79] = "VDPA_GET_CONFIG_SIZE",
  +	[0x7A] = "VDPA_GET_AS_NUM",
  +	[0x7B] = "VDPA_GET_VRING_GROUP",
   	[0x80] = "VDPA_GET_VQS_COUNT",
  +	[0x81] = "VDPA_GET_GROUP_NUM",
   };
  $

Cc: Adrian Hunter 
Cc: Gautam Dawar 
Cc: Jiri Olsa 
Cc: Michael S. Tsirkin 
Cc: Namhyung Kim 
Link: https://lore.kernel.org/lkml/Yrh3xMYbfeAD0MFL@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

tools headers UAPI: Sync linux/prctl.h with the kernel sources

2022-06-19T14:42:25+00:00

To pick the changes in:

  9e4ab6c891094720 ("arm64/sme: Implement vector length configuration prctl()s")

That don't result in any changes in tooling:

  $ tools/perf/trace/beauty/prctl_option.sh > before
  $ cp include/uapi/linux/prctl.h tools/include/uapi/linux/prctl.h
  $ tools/perf/trace/beauty/prctl_option.sh > after
  $ diff -u before after
  $

Just silences this perf tools build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/prctl.h' differs from latest version at 'include/uapi/linux/prctl.h'
  diff -u tools/include/uapi/linux/prctl.h include/uapi/linux/prctl.h

Cc: Catalin Marinas 
Cc: Mark Brown 
Link: http://lore.kernel.org/lkml/Yq81we+XFOqlBWyu@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

2022-05-23T23:07:14+00:00

Daniel Borkmann says:

====================
pull-request: bpf-next 2022-05-23

We've added 113 non-merge commits during the last 26 day(s) which contain
a total of 121 files changed, 7425 insertions(+), 1586 deletions(-).

The main changes are:

1) Speed up symbol resolution for kprobes multi-link attachments, from Jiri Olsa.

2) Add BPF dynamic pointer infrastructure e.g. to allow for dynamically sized ringbuf
   reservations without extra memory copies, from Joanne Koong.

3) Big batch of libbpf improvements towards libbpf 1.0 release, from Andrii Nakryiko.

4) Add BPF link iterator to traverse links via seq_file ops, from Dmitrii Dolgov.

5) Add source IP address to BPF tunnel key infrastructure, from Kaixi Fan.

6) Refine unprivileged BPF to disable only object-creating commands, from Alan Maguire.

7) Fix JIT blinding of ld_imm64 when they point to subprogs, from Alexei Starovoitov.

8) Add BPF access to mptcp_sock structures and their meta data, from Geliang Tang.

9) Add new BPF helper for access to remote CPU's BPF map elements, from Feng Zhou.

10) Allow attaching 64-bit cookie to BPF link of fentry/fexit/fmod_ret, from Kui-Feng Lee.

11) Follow-ups to typed pointer support in BPF maps, from Kumar Kartikeya Dwivedi.

12) Add busy-poll test cases to the XSK selftest suite, from Magnus Karlsson.

13) Improvements in BPF selftest test_progs subtest output, from Mykola Lysenko.

14) Fill bpf_prog_pack allocator areas with illegal instructions, from Song Liu.

15) Add generic batch operations for BPF map-in-map cases, from Takshak Chahande.

16) Make bpf_jit_enable more user friendly when permanently on 1, from Tiezhu Yang.

17) Fix an array overflow in bpf_trampoline_get_progs(), from Yuntao Wang.

====================

Link: https://lore.kernel.org/r/20220523223805.27931-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski

bpf: Add dynptr data slices

2022-05-23T21:31:28+00:00

This patch adds a new helper function

void *bpf_dynptr_data(struct bpf_dynptr *ptr, u32 offset, u32 len);

which returns a pointer to the underlying data of a dynptr. *len*
must be a statically known value. The bpf program may access the returned
data slice as a normal buffer (eg can do direct reads and writes), since
the verifier associates the length with the returned pointer, and
enforces that no out of bounds accesses occur.

Signed-off-by: Joanne Koong 
Signed-off-by: Andrii Nakryiko 
Acked-by: Yonghong Song 
Link: https://lore.kernel.org/bpf/20220523210712.3641569-6-joannelkoong@gmail.com

bpf: Add bpf_dynptr_read and bpf_dynptr_write

2022-05-23T21:31:28+00:00

This patch adds two helper functions, bpf_dynptr_read and
bpf_dynptr_write:

long bpf_dynptr_read(void *dst, u32 len, struct bpf_dynptr *src, u32 offset);

long bpf_dynptr_write(struct bpf_dynptr *dst, u32 offset, void *src, u32 len);

The dynptr passed into these functions must be valid dynptrs that have
been initialized.

Signed-off-by: Joanne Koong 
Signed-off-by: Andrii Nakryiko 
Acked-by: Andrii Nakryiko 
Link: https://lore.kernel.org/bpf/20220523210712.3641569-5-joannelkoong@gmail.com

bpf: Dynptr support for ring buffers

2022-05-23T21:31:28+00:00

Currently, our only way of writing dynamically-sized data into a ring
buffer is through bpf_ringbuf_output but this incurs an extra memcpy
cost. bpf_ringbuf_reserve + bpf_ringbuf_commit avoids this extra
memcpy, but it can only safely support reservation sizes that are
statically known since the verifier cannot guarantee that the bpf
program won’t access memory outside the reserved space.

The bpf_dynptr abstraction allows for dynamically-sized ring buffer
reservations without the extra memcpy.

There are 3 new APIs:

long bpf_ringbuf_reserve_dynptr(void *ringbuf, u32 size, u64 flags, struct bpf_dynptr *ptr);
void bpf_ringbuf_submit_dynptr(struct bpf_dynptr *ptr, u64 flags);
void bpf_ringbuf_discard_dynptr(struct bpf_dynptr *ptr, u64 flags);

These closely follow the functionalities of the original ringbuf APIs.
For example, all ringbuffer dynptrs that have been reserved must be
either submitted or discarded before the program exits.

Signed-off-by: Joanne Koong 
Signed-off-by: Andrii Nakryiko 
Acked-by: Andrii Nakryiko 
Acked-by: David Vernet 
Link: https://lore.kernel.org/bpf/20220523210712.3641569-4-joannelkoong@gmail.com