Add a test for the perf daemon 'signal' command. The test sends a signal
to configured sessions and verifies the perf data files were generated
accordingly.
Committer testing:
[root@five ~]# perf test daemon
76: daemon operations : Ok
[root@five ~]# perf test -v daemon
76: daemon operations :
--- start ---
test child forked, pid 790017
test daemon list
test daemon reconfig
test daemon stop
test daemon signal
signal 12 sent to session 'test [790268]'
signal 12 sent to session 'test [790268]'
test child finished with 0
---- end ----
daemon operations: Ok
[root@five ~]#
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20210208200908.1019149-23-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Add a test for daemon reconfiguration. The test changes the
configuration file and checks that the session is changed properly.
Committer testing:
[root@five ~]# perf test daemon
76: daemon operations : Ok
[root@five ~]# time perf test daemon
76: daemon operations : Ok
real 0m6.055s
user 0m0.174s
sys 0m0.147s
[root@five ~]# time perf test -v daemon
76: daemon operations :
--- start ---
test child forked, pid 786863
test daemon list
test daemon reconfig
test child finished with 0
---- end ----
daemon operations: Ok
real 0m6.127s
user 0m0.222s
sys 0m0.165s
[root@five ~]#
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20210208200908.1019149-21-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Add a 'ping' command to verify that the 'perf record' session is up and
operational.
It's used in the following patches via test code to make sure 'perf
record' is ready to receive signals.
Example:
# cat ~/.perfconfig
[daemon]
base=/opt/perfdata
[session-cycles]
run = -m 10M -e cycles --overwrite --switch-output -a
[session-sched]
run = -m 20M -e sched:* --overwrite --switch-output -a
Start the daemon:
# perf daemon start
Ping all sessions:
# perf daemon ping
OK cycles
OK sched
Ping specific session:
# perf daemon ping --session sched
OK sched
Committer notes:
Fixed up bug pointed by clang:
Buggy:
if (!pollfd.revents & POLLIN)
Correct code:
if (!(pollfd.revents & POLLIN))
clang warning:
builtin-daemon.c:560:6: error: logical not is only applied to the left hand side of this bitwise operator [-Werror,-Wlogical-not-parentheses]
if (!pollfd.revents & POLLIN) {
^ ~
builtin-daemon.c:560:6: note: add parentheses after the '!' to evaluate the bitwise operator first
Also use designated initialized with pollfd, i.e.:
struct pollfd pollfd = { .events = POLLIN, };
Instead of:
struct pollfd pollfd = { 0, };
To get past:
builtin-daemon.c:510:30: error: missing field 'events' initializer [-Werror,-Wmissing-field-initializers]
struct pollfd pollfd = { 0, };
^
1 error generated.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20210208200908.1019149-16-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Add 'lock' file under daemon base and flock it, so only one perf daemon
can run on top of it.
Each daemon tries to create and lock BASE/lock file, if it's successful
we are sure we're the only daemon running over the BASE.
Once daemon is finished, file descriptor to lock file is closed and lock
is released.
Example:
# cat ~/.perfconfig
[daemon]
base=/opt/perfdata
[session-cycles]
run = -m 10M -e cycles --overwrite --switch-output -a
[session-sched]
run = -m 20M -e sched:* --overwrite --switch-output -a
Starting the daemon:
# perf daemon start
And try once more:
# perf daemon start
failed: another perf daemon (pid 775594) owns /opt/perfdata
will end up with an error, because there's already one running
on top of /opt/perfdata.
Committer notes:
Provide lockf(F_TLOCK) when not available, i.e. transform:
lockf(fd, F_TLOCK, 0);
into:
flock(fd, LOCK_EX | LOCK_NB);
Which should be equivalent.
Noticed when cross building to some odd Android NDK.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20210208200908.1019149-14-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Allow the 'perf daemon' to send SIGUSR2 to all running sessions or just
to a specific session.
Example:
# cat ~/.perfconfig
[daemon]
base=/opt/perfdata
[session-cycles]
run = -m 10M -e cycles --overwrite --switch-output -a
[session-sched]
run = -m 20M -e sched:* --overwrite --switch-output -a
Start the daemon:
# perf daemon start
Send signal to all running sessions:
# perf daemon signal
signal 12 sent to session 'cycles [773738]'
signal 12 sent to session 'sched [773739]'
Or to specific one:
# perf daemon signal --session sched
signal 12 sent to session 'sched [773739]'
And verify signals were delivered and perf.data dumped:
# cat /opt/perfdata/session-cycles/output
rounding mmap pages size to 32M (8192 pages)
[ perf record: dump data: Woken up 1 times ]
[ perf record: Dump perf.data.2021010220382490 ]
# car /opt/perfdata/session-sched/output
rounding mmap pages size to 32M (8192 pages)
[ perf record: dump data: Woken up 1 times ]
[ perf record: Dump perf.data.2021010220382489 ]
[ perf record: dump data: Woken up 1 times ]
[ perf record: Dump perf.data.2021010220393745 ]
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20210208200908.1019149-12-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Add a 'list' command to display all running sessions. It's the default
command if no other command is specified.
Example:
# cat ~/.perfconfig
[daemon]
base=/opt/perfdata
[session-cycles]
run = -m 10M -e cycles --overwrite --switch-output -a
[session-sched]
run = -m 20M -e sched:* --overwrite --switch-output -a
Start the daemon:
# perf daemon start
List sessions:
# perf daemon
[771394:daemon] base: /opt/perfdata
[771395:cycles] perf record -m 10M -e cycles --overwrite --switch-output -a
[771396:sched] perf record -m 20M -e sched:* --overwrite --switch-output -a
List sessions with more info:
# perf daemon -v
[771394:daemon] base: /opt/perfdata
output: /opt/perfdata/output
[771395:cycles] perf record -m 10M -e cycles --overwrite --switch-output -a
base: /opt/perfdata/session-cycles
output: /opt/perfdata/session-cycles/output
[771396:sched] perf record -m 20M -e sched:* --overwrite --switch-output -a
base: /opt/perfdata/session-sched
output: /opt/perfdata/session-sched/output
The 'output' file is perf record output for specific session.
Note you have to stop all running perf processes manually at this point,
stop command is coming in following patches.
Committer notes:
Fixup union initialization to overcome this in multiple older systems:
22 15.74 debian:8 : FAIL gcc version 4.9.2 (Debian 4.9.2-10+deb8u2)
builtin-daemon.c: In function 'send_cmd_list':
builtin-daemon.c:1386:2: error: missing initializer for field 'csv_sep' of 'struct <anonymous>' [-Werror=missing-field-initializers]
};
^
builtin-daemon.c:641:8: note: 'csv_sep' declared here
char csv_sep;
^
cc1: all warnings being treated as errors
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20210208200908.1019149-11-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Add support to detect changes to the daemon's config file triggering a
re-read of the configuration when that happens.
Use a inotify file descriptor plugged into the main fdarray object for
polling.
Example:
# cat ~/.perfconfig
[daemon]
base=/opt/perfdata
[session-cycles]
run = -m 10M -e cycles --overwrite --switch-output -a
Starting the daemon:
# perf daemon start
Check sessions:
# perf daemon
[772262:daemon] base: /opt/perfdata
[772263:cycles] perf record -m 10M -e cycles --overwrite --switch-output -a
Change '-m 10M' to '-m 20M', and check daemon log:
# tail -f /opt/perfdata/output
[2021-01-02 20:31:41.234045] daemon started (pid 772262)
[2021-01-02 20:31:41.235072] reconfig: ruining session [cycles:772263]: -m 10M -e cycles --overwrite --switch-output -a
[2021-01-02 20:32:08.310137] reconfig: session 'cycles' killed
[2021-01-02 20:32:08.310847] reconfig: ruining session [cycles:772338]: -m 20M -e cycles --overwrite --switch-output -a
And the session list:
# perf daemon
[772262:daemon] base: /opt/perfdata
[772338:cycles] perf record -m 20M -e cycles --overwrite --switch-output -a
Note the changed '-m 20M' option is in place.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20210208200908.1019149-8-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Adding support to configure daemon with config file.
Each client or server invocation of perf daemon needs to know the
base directory, where all sessions data is stored.
The base is defined with:
daemon.base
Base path for daemon data. All sessions data are stored under
this path.
The daemon allows to create record sessions. Each session is a
record command spawned and monitored by perf daemon.
The session is defined with:
session-<NAME>.run
Defines new record session for daemon. The value is record's
command line without the 'record' keyword.
Example:
# cat ~/.perfconfig
[daemon]
base=/opt/perfdata
[session-cycles]
run = -m 10M -e cycles --overwrite --switch-output -a
[session-sched]
run = -m 20M -e sched:* --overwrite --switch-output -a
The example above defines '/opt/perfdata' as the base directory and 2
record sessions.
# perf daemon start
[2021-01-28 19:47:33.454413] daemon started (pid 16015)
[2021-01-28 19:47:33.455910] reconfig: ruining session [cycles:16016]: -m 10M -e cycles --overwrite --switch-output -a
[2021-01-28 19:47:33.456599] reconfig: ruining session [sched:16017]: -m 20M -e sched:* --overwrite --switch-output -a
# ps -ef | grep perf
... perf daemon start
... /home/jolsa/.../perf record -m 20M -e cycles --overwrite --switch-output -a
... /home/jolsa/.../perf record -m 20M -e sched:* --overwrite --switch-output -a
The base directory is populated with:
# find /opt/perfdata/
/opt/perfdata/
/opt/perfdata/control <- control socket
/opt/perfdata/session-cycles <- data for session 'cycles':
/opt/perfdata/session-cycles/output <- perf record output
/opt/perfdata/session-cycles/perf.data <- perf data
/opt/perfdata/session-sched <- ditto for session 'sched'
/opt/perfdata/session-sched/output
/opt/perfdata/session-sched/perf.data
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20210208200908.1019149-7-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
The Xen shinfo selftest uses '40' when setting the GPA of the vCPU info
struct, but checks for the result at '0x40'. Arbitrarily use the hex
version to resolve the bug.
Fixes: 8d4e7e8083 ("KVM: x86: declare Xen HVM shared info capability and add test case")
Cc: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210210182609.435200-4-seanjc@google.com>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Building the KVM selftests with LLVM's integrated assembler fails with:
$ CFLAGS=-fintegrated-as make -C tools/testing/selftests/kvm CC=clang
lib/x86_64/svm.c:77:16: error: too few operands for instruction
asm volatile ("vmsave\n\t" : : "a" (vmcb_gpa) : "memory");
^
<inline asm>:1:2: note: instantiated into assembly here
vmsave
^
lib/x86_64/svm.c:134:3: error: too few operands for instruction
"vmload\n\t"
^
<inline asm>:1:2: note: instantiated into assembly here
vmload
^
This is because LLVM IAS does not currently support calling vmsave,
vmload, or vmload without an explicit %rax operand.
Add an explicit operand to vmsave, vmload, and vmrum in svm.c. Fixing
this was suggested by Sean Christopherson.
Tested: building without this error in clang 11. The following patch
(not queued yet) needs to be applied to solve the other remaining error:
"selftests: kvm: remove reassignment of non-absolute variables".
Suggested-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/kvm/X+Df2oQczVBmwEzi@google.com/
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Ricardo Koller <ricarkol@google.com>
Message-Id: <20210210031719.769837-1-ricarkol@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add support for client socket side that will be used to send commands to
the daemon server socket.
This patch adds only the core support, all commands using this
functionality are coming in the following patches.
Committer notes:
Hat to patch patch it to deal with this in some systems:
cc1: warnings being treated as errors
builtin-daemon.c: In function 'send_cmd': MKDIR /tmp/build/perf/bench/
builtin-daemon.c:1368: error: ignoring return value of 'fwrite', declared with attribute warn_unused_result
MKDIR /tmp/build/perf/tests/
make[3]: *** [/tmp/build/perf/builtin-daemon.o] Error 1
And also to not leak the 'line' buffer allocated by getline(), since you
initialized line to NULL and len to zero, man page says:
If *lineptr is set to NULL and *n is set 0 before the call,
then getline() will allocate a buffer for storing the line.
This buffer should be freed by the user program even if
getline() failed.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20210208200908.1019149-6-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Atomic tests store a DW, but then load it back as a W from the same
address. This doesn't work on big-endian systems, and since the point
of those tests is not testing narrow loads, fix simply by loading a
DW.
Fixes: 98d666d05a ("bpf: Add tests for new BPF atomic operations")
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210210020713.77911-1-iii@linux.ibm.com
Natively support the stack swizzle pattern:
mov %rsp, (%[tos])
mov %[tos], %rsp
...
pop %rsp
It uses the vals[] array to link the first two stack-ops, and detect
the SP to SP_INDIRECT swizzle.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Where we already decode: mov %rsp, %reg, also decode mov %rsp, (%reg).
Nothing should match for this new stack-op.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Currently REG_SP_INDIRECT is unused but means (%rsp + offset),
change it to mean (%rsp) + offset.
The reason is that we're going to swizzle stack in the middle of a C
function with non-trivial stack footprint. This means that when the
unwinder finds the ToS, it needs to dereference it (%rsp) and then add
the offset to the next frame, resulting in: (%rsp) + offset
This is somewhat unfortunate, since REG_BP_INDIRECT is used (by DRAP)
and thus needs to retain the current (%rbp + offset).
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Pull networking fixes from David Miller:
"Another pile of networing fixes:
1) ath9k build error fix from Arnd Bergmann
2) dma memory leak fix in mediatec driver from Lorenzo Bianconi.
3) bpf int3 kprobe fix from Alexei Starovoitov.
4) bpf stackmap integer overflow fix from Bui Quang Minh.
5) Add usb device ids for Cinterion MV31 to qmi_qwwan driver, from
Christoph Schemmel.
6) Don't update deleted entry in xt_recent netfilter module, from
Jazsef Kadlecsik.
7) Use after free in nftables, fix from Pablo Neira Ayuso.
8) Header checksum fix in flowtable from Sven Auhagen.
9) Validate user controlled length in qrtr code, from Sabyrzhan
Tasbolatov.
10) Fix race in xen/netback, from Juergen Gross,
11) New device ID in cxgb4, from Raju Rangoju.
12) Fix ring locking in rxrpc release call, from David Howells.
13) Don't return LAPB error codes from x25_open(), from Xie He.
14) Missing error returns in gsi_channel_setup() from Alex Elder.
15) Get skb_copy_and_csum_datagram working properly with odd segment
sizes, from Willem de Bruijn.
16) Missing RFS/RSS table init in enetc driver, from Vladimir Oltean.
17) Do teardown on probe failure in DSA, from Vladimir Oltean.
18) Fix compilation failures of txtimestamp selftest, from Vadim
Fedorenko.
19) Limit rx per-napi gro queue size to fix latency regression, from
Eric Dumazet.
20) dpaa_eth xdp fixes from Camelia Groza.
21) Missing txq mode update when switching CBS off, in stmmac driver,
from Mohammad Athari Bin Ismail.
22) Failover pending logic fix in ibmvnic driver, from Sukadev
Bhattiprolu.
23) Null deref fix in vmw_vsock, from Norbert Slusarek.
24) Missing verdict update in xdp paths of ena driver, from Shay
Agroskin.
25) seq_file iteration fix in sctp from Neil Brown.
26) bpf 32-bit src register truncation fix on div/mod, from Daniel
Borkmann.
27) Fix jmp32 pruning in bpf verifier, from Daniel Borkmann.
28) Fix locking in vsock_shutdown(), from Stefano Garzarella.
29) Various missing index bound checks in hns3 driver, from Yufeng Mo.
30) Flush ports on .phylink_mac_link_down() in dsa felix driver, from
Vladimir Oltean.
31) Don't mix up stp and mrp port states in bridge layer, from Horatiu
Vultur.
32) Fix locking during netif_tx_disable(), from Edwin Peer"
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (45 commits)
bpf: Fix 32 bit src register truncation on div/mod
bpf: Fix verifier jmp32 pruning decision logic
bpf: Fix verifier jsgt branch analysis on max bound
vsock: fix locking in vsock_shutdown()
net: hns3: add a check for index in hclge_get_rss_key()
net: hns3: add a check for tqp_index in hclge_get_ring_chain_from_mbx()
net: hns3: add a check for queue_id in hclge_reset_vf_queue()
net: dsa: felix: implement port flushing on .phylink_mac_link_down
switchdev: mrp: Remove SWITCHDEV_ATTR_ID_MRP_PORT_STAT
bridge: mrp: Fix the usage of br_mrp_port_switchdev_set_state
net: watchdog: hold device global xmit lock during tx disable
netfilter: nftables: relax check for stateful expressions in set definition
netfilter: conntrack: skip identical origin tuple in same zone only
vsock/virtio: update credit only if socket is not closed
net: fix iteration for sctp transport seq_files
net: ena: Update XDP verdict upon failure
net/vmw_vsock: improve locking in vsock_connect_timeout()
net/vmw_vsock: fix NULL pointer dereference
ibmvnic: Clear failover_pending if unable to schedule
net: stmmac: set TxQ mode back to DCB after disabling CBS
...
Introduce KVM_CAP_PPC_DAWR1 which can be used by QEMU to query whether
KVM supports 2nd DAWR or not. The capability is by default disabled
even when the underlying CPU supports 2nd DAWR. QEMU needs to check
and enable it manually to use the feature.
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
KVM code assumes single DAWR everywhere. Add code to support 2nd DAWR.
DAWR is a hypervisor resource and thus H_SET_MODE hcall is used to set/
unset it. Introduce new case H_SET_MODE_RESOURCE_SET_DAWR1 for 2nd DAWR.
Also, KVM will support 2nd DAWR only if CPU_FTR_DAWR1 is set.
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
This test expects fds to have specific values, which works fine
when the test is run standalone. However, the kselftest runner
consumes a couple of extra fds for redirection when running
tests, so the test fails when run via kselftest.
Change the test to pass on any valid fd number.
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Hyper-V emulation is enabled in KVM unconditionally. This is bad at least
from security standpoint as it is an extra attack surface. Ideally, there
should be a per-VM capability explicitly enabled by VMM but currently it
is not the case and we can't mandate one without breaking backwards
compatibility. We can, however, check guest visible CPUIDs and only enable
Hyper-V emulation when "Hv#1" interface was exposed in
HYPERV_CPUID_INTERFACE.
Note, VMMs are free to act in any sequence they like, e.g. they can try
to set MSRs first and CPUIDs later so we still need to allow the host
to read/write Hyper-V specific MSRs unconditionally.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20210126134816.1880136-14-vkuznets@redhat.com>
[Add selftest vcpu_set_hv_cpuid API to avoid breaking xen_vmcall_test. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Generally, when Hyper-V emulation is enabled, VMM is supposed to set
Hyper-V CPUID identifications so the guest knows that Hyper-V features
are available. evmcs_test doesn't currently do that but so far Hyper-V
emulation in KVM was enabled unconditionally. As we are about to change
that, proper Hyper-V CPUID identification should be set in selftests as
well.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20210126134816.1880136-3-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
With the updated maximum number of user memslots (32)
set_memory_region_test sometimes takes longer than the default 45 seconds
to finish. Raise the value to an arbitrary 120 seconds.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20210127175731.2020089-6-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
