Commit 1b0578f5 ("qemu-pr-helper: Fix build on CentOS 7") added
code to probe for 'old' libmultipath API on CentOS 7. However since
merge commit 8c345b3e (June 2021) we don't build/test CentOS 7 as
it felt out of our list of supported distrib versions. Therefore we
can safely remove the 'old' API check (mostly reverting commit
1b0578f5, except the code got converted to meson in commit
6ec0e15d "meson: move libmpathpersist test").

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230605174146.87440-2-philmd@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

There is no need to disable this useful compiler warning for
all versions of the SDL. Unfortunately, various versions are
buggy (beside SDL 2.0.8, the version 2.26.0 and 2.26.1 are
broken, too, see https://github.com/libsdl-org/SDL/issues/6619

 ),
but we can use a simple compiler check to see whether we need
the -Wno-undef or not.

This also enables the printing of the version number with
good versions of the SDL in the summary of the meson output
again.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20230605114523.282987-1-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Let's make it easier for the users to spot audio-related entries
in the summary of the meson output.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230602171832.533739-4-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Let's make it easier for the users to spot network-related entries
in the summary of the meson output.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230602171832.533739-3-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Let's make it easier for the users to spot UI-related entries in
the summary of the meson output.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230602171832.533739-2-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

scripts/test-driver.py was used when "make check" was already using meson
introspection data, but it did not execute "meson test".  It is dead since
commit 3d2f73ef ("build: use "meson test" as the test harness", 2021-12-23).

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

qatomic_mb_read and qatomic_mb_set were the very first atomic primitives
introduced for QEMU; their semantics are unclear and they provide a false
sense of safety.

The last use of qatomic_mb_read() has been removed, so delete it.
qatomic_mb_set() instead can survive as an optimized
qatomic_set()+smp_mb(), similar to Linux's smp_store_mb(), but
rename it to qatomic_set_mb() to match the order of the two
operations.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

While detecting a presence of a function via 'cc.links()'
gives desired result (i.e. detects whether function is present),
it also produces a warning on systems where the function is not
present (into meson-log.txt), e.g.:

  qemu.git/build/meson-private/tmph74x3p38/testfile.c:2:34: \
  warning: implicit declaration of function 'malloc_trim' [-Wimplicit-function-declaration]

And some distributions (e.g. Gentoo) parse the meson log and
consider these erroneous because it can lead to feature
misdetection (see [1]).

We can check whether given function exists via
'cc.has_function()' or whether STATX_* macros exist via
'cc.has_header_symbol()'.

1: https://wiki.gentoo.org/wiki/Modern_C_porting
Resolves: https://bugs.gentoo.org/898810


Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Message-Id: <8e02776d18595a1c575c90a189ff65f1785f76ca.1685442612.git.mprivozn@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Build tcg/ once for system and once for user.
Unmap perf_marker.
Remove left over _link_error() definitions.

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* tag 'pull-tcg-20230605' of https://gitlab.com/rth7680/qemu

: (52 commits)
  tcg/tcg-op-vec: Remove left over _link_error() definitions
  accel/tcg: Unmap perf_marker
  tcg: Build once for system and once for user-only
  exec/poison: Do not poison CONFIG_SOFTMMU
  plugins: Drop unused headers from exec/plugin-gen.h
  plugins: Move plugin_insn_append to translator.c
  tcg: Remove target-specific headers from tcg.[ch]
  tcg: Move env defines out of NEED_CPU_H in helper-head.h
  tcg: Fix PAGE/PROT confusion
  accel/tcg: Tidy includes for translator.[ch]
  target/arm: Add missing include of exec/exec-all.h
  target/*: Add missing includes of exec/translation-block.h
  target/mips: Tidy helpers for translation
  target/arm: Tidy helpers for translation
  accel/tcg: Move translator_fake_ldb out of line
  target/ppc: Inline gen_icount_io_start()
  accel/tcg: Introduce translator_io_start
  accel/tcg: Move most of gen-icount.h into translator.c
  include/exec: Remove CODE_GEN_AVG_BLOCK_SIZE
  tcg: Spit out exec/translation-block.h
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

In commit d56fea79 ("tcg: Move TCG_{LOW,HIGH} to tcg-internal.h")
we replaced the "_link_error" definitions with modern QEMU_ERROR()
attribute markup. We covered tcg-op.c but forgot to completely
clean tcg-op-vec.c. Do it now.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230605175647.88395-3-philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Coverity complains that perf_marker is never unmapped.
Fix by unmapping it in perf_exit().

Fixes: Coverity CID 1507929
Fixes: 5584e2db ("tcg: add perfmap and jitdump")
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230605114134.1169974-1-iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Create two static libraries for use by each execution mode.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

If CONFIG_USER_ONLY is ok generically, so is CONFIG_SOFTMMU,
because they are exactly opposite.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Two headers are not required for the rest of the
contents of plugin-gen.h.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

This function is only used in translator.c, and uses a
target-specific typedef: abi_ptr.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

This finally paves the way for tcg/ to be built once per mode.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Since the change to CPUArchState, we have a common typedef
that can always be used.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

The bug was hidden because they happen to have the same values.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Reduce the header to only bswap.h and cpu_ldst.h.
Move exec/translate-all.h to translator.c.
Reduce tcg.h and tcg-op.h to tcg-op-common.h.
Remove otherwise unused headers.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

This had been pulled in via exec/translator.h,
but the include of exec-all.h will be removed.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

This had been pulled in via exec/exec-all.h, via exec/translator.h,
but the include of exec-all.h will be removed.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Move most includes from *translate*.c to translate.h, ensuring
that we get the ordering correct.  Ensure cpu.h is first.
Use disas/disas.h instead of exec/log.h.
Drop otherwise unused includes.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Move most includes from *translate*.c to translate.h, ensuring
that we get the ordering correct.  Ensure cpu.h is first.
Use disas/disas.h instead of exec/log.h.
Drop otherwise unused includes.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

This is used by exactly one host in extraordinary circumstances.
This means that translator.h need not include plugin-gen.h;
translator.c already includes plugin-gen.h.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Now that gen_icount_io_start() is a simple wrapper to
translator_io_start(), inline it.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230602095439.48102-1-philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

New wrapper around gen_io_start which takes care of the USE_ICOUNT
check, as well as marking the DisasContext to end the TB.
Remove exec/gen-icount.h.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

The only usage of gen_tb_start and gen_tb_end are here.
Move the static icount_start_insn variable into a local
within translator_loop.  Simplify the two subroutines
by passing in the existing local cflags variable.

Leave only the declaration of gen_io_start in gen-icount.h.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

The last use was removed with 2ac01d6d.

Fixes: 2ac01d6d ("translate-all: use a binary search tree to track TBs in TBContext")
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

This is all that is required by tcg/ from exec-all.h.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

This makes TranslationBlock agnostic to the address size of the guest.
Use vaddr for pc, since that's always a virtual address.
Use uint64_t for cs_base, since usage varies between guests.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

This is a step toward making TranslationBlock agnostic
to the address size of the guest.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

From this remove, it's no longer clear what this is attempting
to protect.  The last time a use of this define was added to
the source tree, as opposed to merely moved around, was 2008.
There have been many cleanups since that time and this is
no longer required for the build to succeed.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Create tcg/tcg-op-gvec-common.h, moving everything that does not
concern TARGET_LONG_BITS.  Adjust tcg-op-gvec.c to use the new header.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

The replacement isn't ideal, as the raw count of bits
is not easily synced with exec/cpu-all.h, but it does
remove from tcg.h the target dependency on TARGET_PAGE_BITS_MIN
which is built into TLB_FLAGS_MASK.

Reviewed-by: Anton Johansson <anjo@rev.ng>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

This replaces of TCG_GUEST_DEFAULT_MO in tcg-op-ldst.c.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

This will enable replacement of TARGET_INSN_START_WORDS in tcg.c.
Split out "tcg/insn-start-words.h" and use it in target/.

Reviewed-by: Anton Johansson <anjo@rev.ng>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Fixes an assert in tcg_gen_code that we don't accidentally
eliminate an insn_start during optimization.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Create helper-proto-common.h without the target specific portion.
Use that in tcg-op-common.h.  Include helper-proto.h in target/arm
and target/hexagon before helper-info.c.inc; all other targets are
already correct in this regard.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Create helper-gen-common.h without the target specific portion.
Use that in tcg-op-common.h.  Reorg headers in target/arm to
ensure that helper-gen.h is included before helper-info.c.inc.
All other targets are already correct in this regard.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Make tcg_gen_callN a static function.  Create tcg_gen_call[0-7]
functions for use by helper-gen.h.inc.

Removes a multiplicty of calls to __stack_chk_fail, saving up
to 143kiB of .text space as measured on an x86_64 host.

    Old     New Less    %Change
8888680	8741816	146864	1.65%	qemu-system-aarch64
5911832	5856152	55680	0.94%	qemu-system-riscv64
5816728	5767512	49216	0.85%	qemu-system-mips64
6707832	6659144	48688	0.73%	qemu-system-ppc64

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>