bwlp/qemu.git/contrib/plugins, branch master

contrib/plugins: protect execlog's last_exec expansion

2022-10-31T20:37:59+00:00

We originally naively treated expansion as safe because we expected each new CPU/thread to appear in order. However the -M raspi2 model triggered a case where a new high cpu_index thread started executing just before a smaller one. Clean this up by converting the GArray into the simpler GPtrArray and then holding a lock for the expansion. Signed-off-by: Alex Bennée Cc: Alexandre Iooss Reviewed-by: Richard Henderson Message-Id: <20221027183637.2772968-29-alex.bennee@linaro.org>

contrib/plugins: enable debug on CONFIG_DEBUG_TCG

2022-10-31T20:37:59+00:00

We used to rely on QEMU_CFLAGS to expose the debug flags but now this is synthesised by meson and only available to the main build. Add our own flags if we detect the build has been enabled with CONFIG_DEBUG_TCG (which is the default for --enable-debug anyway). Signed-off-by: Alex Bennée Reviewed-by: Philippe Mathieu-Daudé Cc: Paolo Bonzini Message-Id: <20221027183637.2772968-28-alex.bennee@linaro.org>

contrib/plugins: reset skip when matching in execlog

2022-10-06T10:53:40+00:00

The purpose of the matches was to only track the execution of instructions we care about. Without resetting skip to the value at the start of the block we end up dumping all instructions after the match with the consequent load on the instrumentation. Signed-off-by: Alex Bennée Cc: Alexandre Iooss Reviewed-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daudé Message-Id: <20220929114231.583801-40-alex.bennee@linaro.org>

plugins: extend execlog to filter matches

2022-10-06T10:53:40+00:00

Sometimes the whole execlog is just two much so add the ability to filter by instruction opcode or address. [AJB: this shows for example qemu-system-aarch64 -display none -serial mon:stdio \ -M virt -cpu max \ -semihosting-config enable=on \ -kernel ./tests/tcg/aarch64-softmmu/memory-sve \ -plugin ./contrib/plugins/libexeclog.so,ifilter=st1w,afilter=0x40001808 -d plugin -D plugin.out the st1w SVE instruction is not instrumenting its stores.] Signed-off-by: Alex Bennée Reviewed-by: Alexandre Iooss Cc: Robert Henry Cc: Aaron Lindsay Message-Id: <20220929114231.583801-36-alex.bennee@linaro.org>

misc: fix commonly doubled up words

2022-08-01T09:58:02+00:00

Signed-off-by: Daniel P. Berrangé Message-Id: <20220707163720.1421716-5-berrange@redhat.com> Reviewed-by: Peter Maydell Signed-off-by: Thomas Huth

contrib/plugins: add a drcov plugin

2022-02-09T12:08:42+00:00

This patch adds the ability to generate files in drcov format. Primary goal this script is to have coverage logfiles thatwork in Lighthouse. Signed-off-by: Ivanov Arkady Message-Id: <163491884553.304355.13246023070235438959.stgit@pc-System-Product-Name> [AJB: use g_ptr_array instead of slist] Signed-off-by: Alex Bennée Message-Id: <20220204204335.1689602-23-alex.bennee@linaro.org>

plugins/cache: make L2 emulation optional through args

2021-11-04T10:32:01+00:00

By default L2 is not enabled and is enabled by either using the newly-introduced "l2" boolean argument, or by setting any of the L2 cache parameters using args. On specifying "l2=on", the default cache configuration is used. Signed-off-by: Mahmoud Mandour Signed-off-by: Alex Bennée Message-Id: <20210810134844.166490-5-ma.mandourr@gmail.com> Message-Id: <20211026102234.3961636-17-alex.bennee@linaro.org>

plugins/cache: split command line arguments into name and value

2021-11-04T10:32:01+00:00

This way of handling args is more lenient and sets a better framework to parse boolean command line arguments. Signed-off-by: Mahmoud Mandour Signed-off-by: Alex Bennée Message-Id: <20210810134844.166490-4-ma.mandourr@gmail.com> Message-Id: <20211026102234.3961636-16-alex.bennee@linaro.org>

plugins/cache: implement unified L2 cache emulation

2021-11-04T10:32:01+00:00

This adds an implementation of a simple L2 configuration, in which a unified L2 cache (stores both blocks of instructions and data) is maintained for each core separately, with no inter-core interaction taken in account. The L2 cache is used as a backup for L1 and is only accessed if the wanted block does not exist in L1. In terms of multi-threaded user-space emulation, the same approximation of L1 is done, a static number of caches is maintained, and each and every memory access initiated by a thread will have to go through one of the available caches. An atomic increment is used to maintain the number of L2 misses per instruction. The default cache parameters of L2 caches is: 2MB cache size 16-way associativity 64-byte blocks Signed-off-by: Mahmoud Mandour Signed-off-by: Alex Bennée Message-Id: <20210810134844.166490-3-ma.mandourr@gmail.com> Message-Id: <20211026102234.3961636-15-alex.bennee@linaro.org>

plugins/cache: freed heap-allocated mutexes

2021-11-04T10:32:01+00:00

Signed-off-by: Mahmoud Mandour Signed-off-by: Alex Bennée Message-Id: <20210810134844.166490-2-ma.mandourr@gmail.com> Reviewed-by: Alex Bennée Reviewed-by: Philippe Mathieu-Daudé Message-Id: <20211026102234.3961636-14-alex.bennee@linaro.org>