From: "André Przywara" <andre.przywara@arm.com>
To: Leo Yan <leo.yan@linaro.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
Wei Li <liwei391@huawei.com>, James Clark <james.clark@arm.com>,
Dave Martin <Dave.Martin@arm.com>,
linux-kernel@vger.kernel.org, Al Grant <Al.Grant@arm.com>
Subject: Re: [PATCH v2 12/14] perf arm-spe: Add more sub classes for operation packet
Date: Tue, 20 Oct 2020 22:54:57 +0100 [thread overview]
Message-ID: <de7d783c-29c6-0f71-922d-bcefe8f1962a@arm.com> (raw)
In-Reply-To: <20200929133917.9224-13-leo.yan@linaro.org>
On 29/09/2020 14:39, Leo Yan wrote:
Hi,
> For the operation type packet payload with load/store class, it misses
> to support these sub classes:
>
> - A load/store targeting the general-purpose registers;
> - A load/store targeting unspecified registers;
> - The ARMv8.4 nested virtualisation extension can redirect system
> register accesses to a memory page controlled by the hypervisor.
> The SPE profiling feature in newer implementations can tag those
> memory accesses accordingly.
>
> Add the bit pattern describing load/store sub classes, so that the perf
> tool can decode it properly.
>
> Inspired by Andre Przywara, refined the commit log and code for more
> clear description.
>
> Co-developed-by: Andre Przywara <andre.przywara@arm.com>
> Signed-off-by: Leo Yan <leo.yan@linaro.org>
> ---
> .../util/arm-spe-decoder/arm-spe-pkt-decoder.c | 15 +++++++++++++++
> 1 file changed, 15 insertions(+)
>
> diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
> index a848c784f4cf..57a2d5494838 100644
> --- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
> +++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
> @@ -378,6 +378,21 @@ int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf,
> ret = arm_spe_pkt_snprintf(&buf, &blen, " SIMD-FP");
> if (ret < 0)
> return ret;
> + } else if ((payload & SPE_OP_PKT_LDST_SUBCLASS_MASK) ==
These three and the one above use the same mask, should this go into a
switch case? Move this block to the end, then do:
switch (payload & SPE_OP_PKT_LDST_SUBCLASS_MASK) {
case SPE_OP_PKT_LDST_SUBCLASS_GP_REG:
...
case SPE_OP_PKT_LDST_SUBCLASS_UNSPEC_REG:
...
Maybe even assign just a string pointer inside, then have one snprintf.
Haven't checked it that *really* looks better, though.
Also those later checks are quite indented, shall those be moved to
helper functions? Again just an idea ....
Cheers,
Andre
> + SPE_OP_PKT_LDST_SUBCLASS_GP_REG) {
> + ret = arm_spe_pkt_snprintf(&buf, &blen, " GP-REG");
> + if (ret < 0)
> + return ret;
> + } else if ((payload & SPE_OP_PKT_LDST_SUBCLASS_MASK) ==
> + SPE_OP_PKT_LDST_SUBCLASS_UNSPEC_REG) {
> + ret = arm_spe_pkt_snprintf(&buf, &blen, " UNSPEC-REG");
> + if (ret < 0)
> + return ret;
> + } else if ((payload & SPE_OP_PKT_LDST_SUBCLASS_MASK) ==
> + SPE_OP_PKT_LDST_SUBCLASS_NV_SYSREG) {
> + ret = arm_spe_pkt_snprintf(&buf, &blen, " NV-SYSREG");
> + if (ret < 0)
> + return ret;
> }
>
> return buf_len - blen;
>
next prev parent reply other threads:[~2020-10-20 21:55 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-29 13:39 [PATCH v2 00/14] perf arm-spe: Refactor decoding & dumping flow Leo Yan
2020-09-29 13:39 ` [PATCH v2 01/14] perf arm-spe: Include bitops.h for BIT() macro Leo Yan
2020-10-08 13:44 ` André Przywara
2020-09-29 13:39 ` [PATCH v2 02/14] perf arm-spe: Fix a typo in comment Leo Yan
2020-10-08 13:44 ` André Przywara
2020-09-29 13:39 ` [PATCH v2 03/14] perf arm-spe: Refactor payload length calculation Leo Yan
2020-10-08 13:44 ` André Przywara
2020-10-12 0:21 ` Leo Yan
2020-09-29 13:39 ` [PATCH v2 04/14] perf arm-spe: Fix packet length handling Leo Yan
2020-10-08 13:45 ` André Przywara
2020-09-29 13:39 ` [PATCH v2 05/14] perf arm-spe: Refactor printing string to buffer Leo Yan
2020-10-08 13:46 ` André Przywara
2020-10-12 0:29 ` Leo Yan
2020-09-29 13:39 ` [PATCH v2 06/14] perf arm-spe: Refactor packet header parsing Leo Yan
2020-10-08 19:49 ` André Przywara
2020-10-12 1:00 ` Leo Yan
2020-09-29 13:39 ` [PATCH v2 07/14] perf arm-spe: Refactor address packet handling Leo Yan
2020-10-19 9:01 ` André Przywara
2020-10-19 10:41 ` Leo Yan
2020-09-29 13:39 ` [PATCH v2 08/14] perf arm-spe: Refactor context " Leo Yan
2020-10-20 21:53 ` André Przywara
2020-09-29 13:39 ` [PATCH v2 09/14] perf arm-spe: Refactor counter " Leo Yan
2020-10-20 21:53 ` André Przywara
2020-10-21 3:52 ` Leo Yan
2020-09-29 13:39 ` [PATCH v2 10/14] perf arm-spe: Refactor event type handling Leo Yan
2020-10-20 21:54 ` André Przywara
2020-10-21 4:54 ` Leo Yan
2020-10-21 9:20 ` André Przywara
2020-10-21 10:13 ` Leo Yan
2020-09-29 13:39 ` [PATCH v2 11/14] perf arm-spe: Refactor operation packet handling Leo Yan
2020-09-29 13:39 ` [PATCH v2 12/14] perf arm-spe: Add more sub classes for operation packet Leo Yan
2020-10-20 21:54 ` André Przywara [this message]
2020-10-21 5:16 ` Leo Yan
2020-09-29 13:39 ` [PATCH v2 13/14] perf arm_spe: Decode memory tagging properties Leo Yan
2020-09-29 13:39 ` [PATCH v2 14/14] perf arm-spe: Add support for ARMv8.3-SPE Leo Yan
2020-10-20 21:54 ` André Przywara
2020-10-21 5:10 ` Leo Yan
2020-10-21 9:26 ` André Przywara
2020-10-21 10:17 ` Leo Yan
2020-10-21 14:53 ` André Przywara
2020-10-22 0:44 ` Leo Yan
2020-10-13 14:53 ` [PATCH v2 00/14] perf arm-spe: Refactor decoding & dumping flow Arnaldo Carvalho de Melo
2020-10-13 15:19 ` Leo Yan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=de7d783c-29c6-0f71-922d-bcefe8f1962a@arm.com \
--to=andre.przywara@arm.com \
--cc=Al.Grant@arm.com \
--cc=Dave.Martin@arm.com \
--cc=acme@kernel.org \
--cc=alexander.shishkin@linux.intel.com \
--cc=james.clark@arm.com \
--cc=jolsa@redhat.com \
--cc=leo.yan@linaro.org \
--cc=linux-kernel@vger.kernel.org \
--cc=liwei391@huawei.com \
--cc=mark.rutland@arm.com \
--cc=mingo@redhat.com \
--cc=namhyung@kernel.org \
--cc=peterz@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).