plugins: remove previous n_vcpus functions from API

This information is already accessible using qemu_info_t during plugin
install.

We will introduce another function (qemu_plugin_num_vcpus) which

plugins: remove previous n_vcpus functions from API

This information is already accessible using qemu_info_t during plugin
install.

We will introduce another function (qemu_plugin_num_vcpus) which
represent how many cpus were enabled, by tracking new cpu indexes.

It's a breaking change, so we bump API version.

Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240213094009.150349-2-pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240227144335.1196131-16-alex.bennee@linaro.org>

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contrib/plugins: fix coverity warning in cache

Coverity complains that appends_stats_line can be fed a 0 leading
to the undefined behaviour of a divide by 0.

Fixes: CID 1519044
Fixes: CID 1519047
S

contrib/plugins: fix coverity warning in cache

Coverity complains that appends_stats_line can be fed a 0 leading
to the undefined behaviour of a divide by 0.

Fixes: CID 1519044
Fixes: CID 1519047
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20231009164104.369749-24-alex.bennee@linaro.org>

show more ...

contrib/plugins: fix coverity warning in cache

Coverity complains that appends_stats_line can be fed a 0 leading
to the undefined behaviour of a divide by 0.

Fixes: CID 1519044
Fixes: CID 1519047
S

contrib/plugins: fix coverity warning in cache

Coverity complains that appends_stats_line can be fed a 0 leading
to the undefined behaviour of a divide by 0.

Fixes: CID 1519044
Fixes: CID 1519047
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20231009164104.369749-24-alex.bennee@linaro.org>

show more ...

contrib/plugins: fix coverity warning in cache

Coverity complains that appends_stats_line can be fed a 0 leading
to the undefined behaviour of a divide by 0.

Fixes: CID 1519044
Fixes: CID 1519047
S

contrib/plugins: fix coverity warning in cache

Coverity complains that appends_stats_line can be fed a 0 leading
to the undefined behaviour of a divide by 0.

Fixes: CID 1519044
Fixes: CID 1519047
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20231009164104.369749-24-alex.bennee@linaro.org>

show more ...

contrib/plugins: fix coverity warning in cache

Coverity complains that appends_stats_line can be fed a 0 leading
to the undefined behaviour of a divide by 0.

Fixes: CID 1519044
Fixes: CID 1519047
S

contrib/plugins: fix coverity warning in cache

Coverity complains that appends_stats_line can be fed a 0 leading
to the undefined behaviour of a divide by 0.

Fixes: CID 1519044
Fixes: CID 1519047
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20231009164104.369749-24-alex.bennee@linaro.org>

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accel/tcg: spelling fixes

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Message-ID: <20230823065335.1919380-18-mjt@tls.msk.ru>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <202308

accel/tcg: spelling fixes

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Message-ID: <20230823065335.1919380-18-mjt@tls.msk.ru>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20230823065335.1919380-19-mjt@tls.msk.ru>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

show more ...

contrib/plugins/cache: Fix string format

This fixes on Darwin:

plugins/cache.c:550:28: warning: format specifies type 'unsigned long' but the argument has type 'uint64_t' (aka 'unsigned long long

contrib/plugins/cache: Fix string format

This fixes on Darwin:

plugins/cache.c:550:28: warning: format specifies type 'unsigned long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Wformat]
l1_daccess,
^~~~~~~~~~
plugins/cache.c:551:28: warning: format specifies type 'unsigned long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Wformat]
l1_dmisses,
^~~~~~~~~~
plugins/cache.c:553:28: warning: format specifies type 'unsigned long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Wformat]
l1_iaccess,
^~~~~~~~~~
plugins/cache.c:554:28: warning: format specifies type 'unsigned long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Wformat]
l1_imisses,
^~~~~~~~~~
plugins/cache.c:560:32: warning: format specifies type 'unsigned long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Wformat]
l2_access,
^~~~~~~~~
plugins/cache.c:561:32: warning: format specifies type 'unsigned long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Wformat]
l2_misses,
^~~~~~~~~
plugins/cache.c:665:52: warning: format specifies type 'long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Wformat]
g_string_append_printf(rep, ", %ld, %s\n", insn->l1_dmisses,
~~~ ^~~~~~~~~~~~~~~~
%llu
plugins/cache.c:678:52: warning: format specifies type 'long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Wformat]
g_string_append_printf(rep, ", %ld, %s\n", insn->l1_imisses,
~~~ ^~~~~~~~~~~~~~~~
%llu
plugins/cache.c:695:52: warning: format specifies type 'long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Wformat]
g_string_append_printf(rep, ", %ld, %s\n", insn->l2_misses,
~~~ ^~~~~~~~~~~~~~~
%llu

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230907105004.88600-2-philmd@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

show more ...

accel/tcg: spelling fixes

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Message-ID: <20230823065335.1919380-18-mjt@tls.msk.ru>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <202308

accel/tcg: spelling fixes

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Message-ID: <20230823065335.1919380-18-mjt@tls.msk.ru>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20230823065335.1919380-19-mjt@tls.msk.ru>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

show more ...

accel/tcg: spelling fixes

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Message-ID: <20230823065335.1919380-18-mjt@tls.msk.ru>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <202308

accel/tcg: spelling fixes

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Message-ID: <20230823065335.1919380-18-mjt@tls.msk.ru>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20230823065335.1919380-19-mjt@tls.msk.ru>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

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plugins: fix memory leak while parsing options

It was hard to track down this leak as it was an internal allocation
by glib and the backtraces did not give much away. The autofree was
freeing the al

plugins: fix memory leak while parsing options

It was hard to track down this leak as it was an internal allocation
by glib and the backtraces did not give much away. The autofree was
freeing the allocation with g_free() but not taking care of the
individual strings. They should have been freed with g_strfreev()
instead.

Searching the glib source code for the correct string free function
led to:

G_DEFINE_AUTO_CLEANUP_FREE_FUNC(GStrv, g_strfreev, NULL)

and indeed if you read to the bottom of the documentation page you
will find:

typedef gchar** GStrv;

A typedef alias for gchar**. This is mostly useful when used together with g_auto().

So fix up all the g_autofree g_strsplit case that smugly thought they
had de-allocation covered.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230630180423.558337-21-alex.bennee@linaro.org>

show more ...

plugins: fix memory leak while parsing options

It was hard to track down this leak as it was an internal allocation
by glib and the backtraces did not give much away. The autofree was
freeing the al

plugins: fix memory leak while parsing options

It was hard to track down this leak as it was an internal allocation
by glib and the backtraces did not give much away. The autofree was
freeing the allocation with g_free() but not taking care of the
individual strings. They should have been freed with g_strfreev()
instead.

Searching the glib source code for the correct string free function
led to:

G_DEFINE_AUTO_CLEANUP_FREE_FUNC(GStrv, g_strfreev, NULL)

and indeed if you read to the bottom of the documentation page you
will find:

typedef gchar** GStrv;

A typedef alias for gchar**. This is mostly useful when used together with g_auto().

So fix up all the g_autofree g_strsplit case that smugly thought they
had de-allocation covered.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230630180423.558337-21-alex.bennee@linaro.org>

show more ...

Drop more useless casts from void * to pointer

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20221123133811.1398562-1-armbru@redha

Drop more useless casts from void * to pointer

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20221123133811.1398562-1-armbru@redhat.com>

show more ...

Drop more useless casts from void * to pointer

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20221123133811.1398562-1-armbru@redha

Drop more useless casts from void * to pointer

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20221123133811.1398562-1-armbru@redhat.com>

show more ...

misc: fix commonly doubled up words

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

misc: fix commonly doubled up words

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

show more ...

misc: fix commonly doubled up words

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

misc: fix commonly doubled up words

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

show more ...

misc: fix commonly doubled up words

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

misc: fix commonly doubled up words

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

show more ...

plugins/cache: make L2 emulation optional through args

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 param

plugins/cache: make L2 emulation optional through args

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 <ma.mandourr@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210810134844.166490-5-ma.mandourr@gmail.com>
Message-Id: <20211026102234.3961636-17-alex.bennee@linaro.org>

show more ...

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

This way of handling args is more lenient and sets a better framework to
parse boolean command line arguments.

Signed-off-by: Mahmoud

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

This way of handling args is more lenient and sets a better framework to
parse boolean command line arguments.

Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210810134844.166490-4-ma.mandourr@gmail.com>
Message-Id: <20211026102234.3961636-16-alex.bennee@linaro.org>

show more ...

plugins/cache: implement unified L2 cache emulation

This adds an implementation of a simple L2 configuration, in which a
unified L2 cache (stores both blocks of instructions and data) is
maintained

plugins/cache: implement unified L2 cache emulation

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 <ma.mandourr@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210810134844.166490-3-ma.mandourr@gmail.com>
Message-Id: <20211026102234.3961636-15-alex.bennee@linaro.org>

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plugins/cache: freed heap-allocated mutexes

Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210810134844.166490-2-ma.mandour

plugins/cache: freed heap-allocated mutexes

Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210810134844.166490-2-ma.mandourr@gmail.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20211026102234.3961636-14-alex.bennee@linaro.org>

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plugins/cache: supported multicore cache modelling

Multicore L1 cache modelling is introduced and is supported for both
full system emulation and linux-user.

For full-system emulation, L1 icache an

plugins/cache: supported multicore cache modelling

Multicore L1 cache modelling is introduced and is supported for both
full system emulation and linux-user.

For full-system emulation, L1 icache and dcache are maintained for each
available core, since this information is exposed to the plugin through
`qemu_plugin_n_vcpus()`.

For linux-user, a static number of cores is assumed (default 1 core, and
can be provided as a plugin argument `cores=N`). Every memory access
goes through one of these caches, this approach is taken as it's
somewhat akin to what happens on real setup, where a program that
dispatches more threads than the available cores, they'll thrash
each other

Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Message-Id: <20210803151301.123581-2-ma.mandourr@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

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plugins/cache: Fixed "function decl. is not a prototype" warnings

Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alex Bennée

plugins/cache: Fixed "function decl. is not a prototype" warnings

Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210714172151.8494-7-ma.mandourr@gmail.com>
Message-Id: <20210720232703.10650-24-alex.bennee@linaro.org>

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plugins/cache: limited the scope of a mutex lock

It's not necessary to lock the address translation portion of the
vcpu_mem_access callback.

Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
S

plugins/cache: limited the scope of a mutex lock

It's not necessary to lock the address translation portion of the
vcpu_mem_access callback.

Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210714172151.8494-3-ma.mandourr@gmail.com>
Message-Id: <20210720232703.10650-23-alex.bennee@linaro.org>

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plugins/cache: Fixed a bug with destroying FIFO metadata

This manifests itself when associativity degree is greater than the
number of sets and FIFO is used, otherwise it's also a memory leak
whenev

plugins/cache: Fixed a bug with destroying FIFO metadata

This manifests itself when associativity degree is greater than the
number of sets and FIFO is used, otherwise it's also a memory leak
whenever FIFO was used.

Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210714172151.8494-2-ma.mandourr@gmail.com>
Message-Id: <20210720232703.10650-22-alex.bennee@linaro.org>

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plugins/cache: Added FIFO and LRU eviction policies

Implemented FIFO and LRU eviction policies. Now one of the three
eviction policies can be chosen as an argument. On not specifying an
argument, LR

plugins/cache: Added FIFO and LRU eviction policies

Implemented FIFO and LRU eviction policies. Now one of the three
eviction policies can be chosen as an argument. On not specifying an
argument, LRU is used by default.

Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210623125458.450462-4-ma.mandourr@gmail.com>
Message-Id: <20210709143005.1554-39-alex.bennee@linaro.org>

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