We already support duplication of 128-bit blocks. This extends
that support to 256-bit blocks. This will be needed by SVE2.
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Do not store back to the exact memory from which we just loaded.
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
The fallback inline expansion for vectorized absolute value,
when the host doesn't support such an insn was flawed.
E.g. when a vector of bytes has all elements negative, mask
will be 0xffff_ffff_ffff_ffff. Subtracting mask only adds 1
to the low element instead of all elements becase -mask is 1
and not 0x0101_0101_0101_0101.
Signed-off-by: Stephen Long <steplong@quicinc.com>
Message-Id: <20200813161818.190-1-steplong@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Here's my first pull request for qemu-5.2, which has quite a few
accumulated things. Highlights are:
* Preliminary support for POWER10 (Power ISA 3.1) instruction emulation
* Add documentation on the (very confusing) pseries NUMA configuration
* Fix some bugs handling edge cases with XICS, XIVE and kernel_irqchip
* Fix icount for a number of POWER registers
* Many cleanups to error handling in XIVE code
* Validate size of -prom-env data
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Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-5.2-20200818' into staging
ppc patch queue 2020-08-18
Here's my first pull request for qemu-5.2, which has quite a few
accumulated things. Highlights are:
* Preliminary support for POWER10 (Power ISA 3.1) instruction emulation
* Add documentation on the (very confusing) pseries NUMA configuration
* Fix some bugs handling edge cases with XICS, XIVE and kernel_irqchip
* Fix icount for a number of POWER registers
* Many cleanups to error handling in XIVE code
* Validate size of -prom-env data
# gpg: Signature made Tue 18 Aug 2020 05:18:36 BST
# gpg: using RSA key 75F46586AE61A66CC44E87DC6C38CACA20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>" [full]
# gpg: aka "David Gibson (Red Hat) <dgibson@redhat.com>" [full]
# gpg: aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>" [full]
# gpg: aka "David Gibson (kernel.org) <dwg@kernel.org>" [unknown]
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E 87DC 6C38 CACA 20D9 B392
* remotes/dgibson/tags/ppc-for-5.2-20200818: (40 commits)
spapr/xive: Use xive_source_esb_len()
nvram: Exit QEMU if NVRAM cannot contain all -prom-env data
spapr/xive: Simplify error handling of kvmppc_xive_cpu_synchronize_state()
ppc/xive: Simplify error handling in xive_tctx_realize()
spapr/xive: Simplify error handling in kvmppc_xive_connect()
ppc/xive: Fix error handling in vmstate_xive_tctx_*() callbacks
spapr/xive: Fix error handling in kvmppc_xive_post_load()
spapr/kvm: Fix error handling in kvmppc_xive_pre_save()
spapr/xive: Rework error handling of kvmppc_xive_set_source_config()
spapr/xive: Rework error handling in kvmppc_xive_get_queues()
spapr/xive: Rework error handling of kvmppc_xive_[gs]et_queue_config()
spapr/xive: Rework error handling of kvmppc_xive_cpu_[gs]et_state()
spapr/xive: Rework error handling of kvmppc_xive_mmap()
spapr/xive: Rework error handling of kvmppc_xive_source_reset()
spapr/xive: Rework error handling of kvmppc_xive_cpu_connect()
spapr: Simplify error handling in spapr_phb_realize()
spapr/xive: Convert KVM device fd checks to assert()
ppc/xive: Introduce dedicated kvm_irqchip_in_kernel() wrappers
ppc/xive: Rework setup of XiveSource::esb_mmio
target/ppc: Integrate icount to purr, vtb, and tbu40
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
With Makefiles that have automatically generated dependencies, you
generated includes are set as dependencies of the Makefile, so that they
are built before everything else and they are available when first
building the .c files.
Alternatively you can use a fine-grained dependency, e.g.
target/arm/translate.o: target/arm/decode-neon-shared.inc.c
With Meson you have only one choice and it is a third option, namely
"build at the beginning of the corresponding target"; the way you
express it is to list the includes in the sources of that target.
The problem is that Meson decides if something is a source vs. a
generated include by looking at the extension: '.c', '.cc', '.m', '.C'
are sources, while everything else is considered an include---including
'.inc.c'.
Use '.c.inc' to avoid this, as it is consistent with our other convention
of using '.rst.inc' for included reStructuredText files. The editorconfig
file is adjusted.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Group vmuluwm and vmulld. Make vmulld-specific
changes since it belongs to new ISA 3.1.
Signed-off-by: Lijun Pan <ljp@linux.ibm.com>
Message-Id: <20200724045845.89976-3-ljp@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Forgetting this asserts when tcg_gen_cmp_vec is called from
within tcg_gen_cmpsel_vec.
Fixes: 72b4c792c7
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Remove superfluous breaks, as there is a "return" before them.
Signed-off-by: Liao Pingfang <liao.pingfang@zte.com.cn>
Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <1594600421-22942-1-git-send-email-wang.yi59@zte.com.cn>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
The smin/smax/umin/umax operations require the operands to be
properly sign extended. Do not drop the MO_SIGN bit from the
load, and additionally extend the val input.
Reviewed-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
Reported-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200701165646.1901320-1-richard.henderson@linaro.org>
Sanitize shift constants so that shift operations with
large constants don't generate invalid instructions.
Signed-off-by: Catherine A. Frederick <chocola@animebitch.es>
Message-Id: <20200607211100.22858-1-agrecascino123@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
If the output of the move is dead, then the last use is in
the store. If we propagate the input to the store, then we
can remove the move opcode entirely.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
We already had support for rotlv, using a target-specific opcode;
convert to use the generic opcode. Handle rotrv via simple negation.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
For immediate rotate , we can implement this in two instructions,
using SLI. For variable rotate, the oddness of aarch64 right-shift-
as-negative-left-shift means a backend-specific expansion works best.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
For immediates, we must continue the special casing of 8-bit
elements. The other element sizes and shift types are trivially
implemented with shifts.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
No host backend support yet, but the interfaces for rotls
are in place. Only implement left-rotate for now, as the
only known use of vector rotate by scalar is s390x, so any
right-rotate would be unused and untestable.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
We do not reflect this expansion in tcg_can_emit_vecop_list,
so it is unused and unusable. However, we actually perform
the same expansion in do_gvec_shifts, so it is also unneeded.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
No host backend support yet, but the interfaces for rotlv
and rotrv are in place.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v3: Drop the generic expansion from rot to shift; we can do better
for each backend, and then this code becomes unused.
No host backend support yet, but the interfaces for rotli
are in place. Canonicalize immediate rotate to the left,
based on a survey of architectures, but provide both left
and right shift interfaces to the translators.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This will become useful shortly for providing more information about
output assembly inline. While there fix up the indenting and code
formatting in disas().
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200513175134.19619-9-alex.bennee@linaro.org>
For the benefit of compatibility of function pointer types,
we have standardized on int32_t and int64_t as the integral
argument to tcg expanders.
We converted most of them in 474b2e8f0f, but missed the rotates.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
We have this same parameter for GVecGen2i, GVecGen3,
and GVecGen3i. This will make some SVE2 insns easier
to parameterize.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Better handling of non-power-of-2 tails as seen with Arm 8-byte
vector operations.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
These interfaces are now unused.
Reviewed-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Replace the outgoing interface.
Reviewed-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Add a version of tcg_gen_dup_* that takes both immediate and
a vector element size operand. This will replace the set of
tcg_gen_gvec_dup{8,16,32,64}i functions that encode the element
size within the function name.
Reviewed-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
OPC_SYNC_WMB, OPC_SYNC_MB, OPC_SYNC_ACQUIRE, OPC_SYNC_RELEASE and
OPC_SYNC_RMB have wrong encode. According to the mips manual,
their encode should be 'OPC_SYNC | 0x?? << 6' rather than
'OPC_SYNC | 0x?? << 5'. Wrong encode can lead illegal instruction
errors. These instructions often appear with multi-threaded
simulation.
Fixes: 6f0b99104a ("tcg/mips: Add support for fence")
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: lixinyu <precinct@mail.ustc.edu.cn>
Message-Id: <20200411124612.12560-1-precinct@mail.ustc.edu.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
When %gs cannot be used, we use register offset addressing.
This path is almost never used, so it was clearly not tested.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200406174803.8192-1-richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
We were only constructing the 64-bit element, and not
replicating the 64-bit element across the rest of the vector.
Cc: qemu-stable@nongnu.org
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
A given RISU testcase for SVE can produce
tcg-op-vec.c:511: do_shifti: Assertion `i >= 0 && i < (8 << vece)' failed.
because expand_vec_sari gave a shift count of 32 to a MO_32
vector shift.
In 44f1441dbe, we changed from direct expansion of vector opcodes
to re-use of the tcg expanders. So while the comment correctly notes
that the hw will handle such a shift count, we now have to take our
own sanity checks into account. Which is easy in this particular case.
Fixes: 44f1441dbe
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
It is, after all, just two instructions.
Profiling on a cortex-a15, using -d nochain to increase the number
of exit_tb that are executed, shows a minor improvement of 0.5%.
Signed-off-by: Richard Henderson <rth@twiddle.net>
We will shortly use this function from tcg_out_op as well.
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
While do_gen_mem_cb does copy (via extu_tl_i64) vaddr into a new temp
this won't help if the vaddr temp gets clobbered by the actual
load/store op. To avoid this clobbering we explicitly copy vaddr
before the op to ensure it is live my the time we do the
instrumentation.
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Emilio G. Cota <cota@braap.org>
Cc: qemu-stable@nongnu.org
Message-Id: <20200225124710.14152-18-alex.bennee@linaro.org>
Extend the vector generator infrastructure to handle
5 vector arguments.
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200101112303.20724-4-philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
All the *.inc.c files included by tcg/$TARGET/tcg-target.inc.c
are in tcg/, their parent directory. To simplify the preprocessor
search path, include the relative parent path: '..'.
Patch created mechanically by running:
$ for x in tcg-pool.inc.c tcg-ldst.inc.c; do \
sed -i "s,#include \"$x\",#include \"../$x\"," \
$(git grep -l "#include \"$x\""); \
done
Acked-by: David Gibson <david@gibson.dropbear.id.au> (ppc parts)
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200101112303.20724-3-philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
We currently search both the root and the tcg/ directories for tcg
files:
$ git grep '#include "tcg/' | wc -l
28
$ git grep '#include "tcg[^/]' | wc -l
94
To simplify the preprocessor search path, unify by expliciting the
tcg/ directory.
Patch created mechanically by running:
$ for x in \
tcg.h tcg-mo.h tcg-op.h tcg-opc.h \
tcg-op-gvec.h tcg-gvec-desc.h; do \
sed -i "s,#include \"$x\",#include \"tcg/$x\"," \
$(git grep -l "#include \"$x\""); \
done
Acked-by: David Gibson <david@gibson.dropbear.id.au> (ppc parts)
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200101112303.20724-2-philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
There are no uses of the *_cmmu names other than the bare wrapping
within the *_code inlines. Therefore rename the functions so we
can drop the inlines.
Use abi_ptr instead of target_ulong in preparation for user-only;
the two types are identical for softmmu.
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This now allows changing the logfile while logging is active,
and also solves the issue of a seg fault while changing the logfile.
Any read access to the qemu_logfile handle will use
the rcu_read_lock()/unlock() around the use of the handle.
To fetch the handle we will use atomic_rcu_read().
We also in many cases do a check for validity of the
logfile handle before using it to deal with the case where the
file is closed and set to NULL.
The cases where we write to the qemu_logfile will use atomic_rcu_set().
Writers will also use call_rcu() with a newly added qemu_logfile_free
function for freeing/closing when readers have finished.
Signed-off-by: Robert Foley <robert.foley@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20191118211528.3221-6-robert.foley@linaro.org>
qemu_log_lock() now returns a handle and qemu_log_unlock() receives a
handle to unlock. This allows for changing the handle during logging
and ensures the lock() and unlock() are for the same file.
Also in target/tilegx/translate.c removed the qemu_log_lock()/unlock()
calls (and the log("\n")), since the translator can longjmp out of the
loop if it attempts to translate an instruction in an inaccessible page.
Signed-off-by: Robert Foley <robert.foley@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20191118211528.3221-5-robert.foley@linaro.org>
Since 2008 the tcg/LICENSE file has not changed: it claims that
everything under tcg/ is BSD-licensed.
This is not true and hasn't been true for years: in 2013 we
accepted the tcg/aarch64 target code under a GPLv2-or-later
license statement. We also have generic vector optimisation
code under the LGPL2.1-or-later, and the TCI backend is
GPLv2-or-later. Further, many of the files are not BSD
licensed but MIT licensed.
We don't really consider the tcg subdirectory to be a distinct part
of QEMU anyway.
Remove the LICENSE file, since claiming false information
about the license of the code is confusing.
Update the main project LICENSE file also to be clearer about
the licenses used by TCG.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20191025155848.17362-5-peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Add the copyright/license boilerplate for tcg/i386/tcg-target.opc.h.
This file has had only two commits, 4b06c21682 and
d9897efa1f, both by a Linaro engineer.
The license is MIT, since that's what the rest of tcg/ppc/ is.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20191025155848.17362-4-peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Add the copyright/license boilerplate for tcg/i386/tcg-target.opc.h.
This file has had only one commit, 770c2fc7bb, by
a Linaro engineer.
The license is MIT, since that's what the rest of tcg/i386/ is.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20191025155848.17362-3-peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Add the copyright/license boilerplate for target/aarch64/tcg-target.opc.h.
This file has only had two commits: 14e4c1e235
and 79525dfd08, both by the same Linaro engineer.
The license is GPL-2-or-later, since that's what the
rest of tcg/aarch64 uses.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20191025155848.17362-2-peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
- use --enable-plugins @ configure
- low impact introspection (-plugin empty.so to measure overhead)
- plugins cannot alter guest state
- example plugins included in source tree (tests/plugins)
- -d plugin to enable plugin output in logs
- check-tcg runs extra tests when plugins enabled
- documentation in docs/devel/plugins.rst
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Merge remote-tracking branch 'remotes/stsquad/tags/pull-tcg-plugins-281019-4' into staging
TCG Plugins initial implementation
- use --enable-plugins @ configure
- low impact introspection (-plugin empty.so to measure overhead)
- plugins cannot alter guest state
- example plugins included in source tree (tests/plugins)
- -d plugin to enable plugin output in logs
- check-tcg runs extra tests when plugins enabled
- documentation in docs/devel/plugins.rst
# gpg: Signature made Mon 28 Oct 2019 15:13:23 GMT
# gpg: using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [full]
# Primary key fingerprint: 6685 AE99 E751 67BC AFC8 DF35 FBD0 DB09 5A9E 2A44
* remotes/stsquad/tags/pull-tcg-plugins-281019-4: (57 commits)
travis.yml: enable linux-gcc-debug-tcg cache
MAINTAINERS: add me for the TCG plugins code
scripts/checkpatch.pl: don't complain about (foo, /* empty */)
.travis.yml: add --enable-plugins tests
include/exec: wrap cpu_ldst.h in CONFIG_TCG
accel/stubs: reduce headers from tcg-stub
tests/plugin: add hotpages to analyse memory access patterns
tests/plugin: add instruction execution breakdown
tests/plugin: add a hotblocks plugin
tests/tcg: enable plugin testing
tests/tcg: drop test-i386-fprem from TESTS when not SLOW
tests/tcg: move "virtual" tests to EXTRA_TESTS
tests/tcg: set QEMU_OPTS for all cris runs
tests/tcg/Makefile.target: fix path to config-host.mak
tests/plugin: add sample plugins
linux-user: support -plugin option
vl: support -plugin option
plugin: add qemu_plugin_outs helper
plugin: add qemu_plugin_insn_disas helper
plugin: expand the plugin_init function to include an info block
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
We document this in docs/devel/load-stores.rst so lets follow it. The
32 bit and 64 bit access functions have historically not included the
sign so we leave those as is. We also introduce some signed helpers
which are used for loading immediate values in the translator.
Fixes: 282dffc8
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20191021150910.23216-1-alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
To capture all memory accesses we need hook into all the various
helper functions that are involved in memory operations as well as the
injected inline helper calls. A later commit will allow us to resolve
the actual guest HW addresses by replaying the lookup.
Signed-off-by: Emilio G. Cota <cota@braap.org>
[AJB: drop haddr handling, just deal in vaddr]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
We first inject empty instrumentation from translator_loop.
After translation, we go through the plugins to see what
they want to register for, filling in the empty instrumentation.
If if turns out that some instrumentation remains unused, we
remove it.
This approach supports the following features:
- Inlining TCG code for simple operations. Note that we do not
export TCG ops to plugins. Instead, we give them a C API to
insert inlined ops. So far we only support adding an immediate
to a u64, e.g. to count events.
- "Direct" callbacks. These are callbacks that do not go via
a helper. Instead, the helper is defined at run-time, so that
the plugin code is directly called from TCG. This makes direct
callbacks as efficient as possible; they are therefore used
for very frequent events, e.g. memory callbacks.
- Passing the host address to memory callbacks. Most of this
is implemented in a later patch though.
- Instrumentation of memory accesses performed from helpers.
See the corresponding comment, as well as a later patch.
Signed-off-by: Emilio G. Cota <cota@braap.org>
[AJB: add alloc_tcg_plugin_context, use glib, rm hwaddr]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Will gain a user soon.
Signed-off-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
We are going to re-use mem_info later for plugins and will need to
track the mmu_idx for softmmu code.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
