include/qemu: Remove ifndef CONFIG_USER_ONLY from accel.h

While setup_post and has_memory will not be used for
CONFIG_USER_ONLY, let the struct have constant layout.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

include/system: Remove ifndef CONFIG_USER_ONLY in qtest.h

This is include/system, so CONFIG_USER_ONLY will never be true.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

include/exec: Protect icount_enabled from poisoned symbols

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

include/exec: Split out icount.h

Split icount stuff from system/cpu-timers.h.
There are 17 files which only require icount.h, 7 that only
require cpu-timers.h, and 7 that require both.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

include/hw/s390x: Remove ifndef CONFIG_USER_ONLY in css.h

We were hiding a number of declarations from user-only,
although it hurts nothing to allow them.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

include/hw/intc: Remove ifndef CONFIG_USER_ONLY from armv7m_nvic.h

We were hiding a number of declarations from user-only,
although it hurts nothing to allow them.  The inlines
for user-only are unused.

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

include/hw/core: Drop ifndef CONFIG_USER_ONLY from cpu.h

We were hiding a number of declarations from user-only,
although it hurts nothing to allow them.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

include/exec: Drop ifndef CONFIG_USER_ONLY from cpu-common.h

We were hiding a number of declarations from user-only,
although it hurts nothing to allow them.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

plugins: Move api.c, core.c to libuser_ss, libsystem_ss

Headers used by these files require CONFIG_USER_ONLY.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

system: Move most files to libsystem_ss

Some of the headers used require CONFIG_USER_ONLY.
Do not move vl.c, because it has other include dependencies
that are present in system_ss.

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

hw/core: Move unconditional files to libsystem_ss, libuser_ss

Many of the headers used by these require CONFIG_USER_ONLY.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

include/exec: Split out watchpoint.h

Relatively few objects in qemu care about watchpoints, so split
out to a new header.  Removes an instance of CONFIG_USER_ONLY
from hw/core/cpu.h.

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

semihosting: Assert is_user in user-only semihosting_enabled

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

semihosting: Move user-only implementation out-of-line

Avoid testing CONFIG_USER_ONLY in semihost.h.
The only function that's required is semihosting_enabled.

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

target/xtensa: Restrict semihosting tests to system mode

We do not set CONFIG_SEMIHOSTING in
configs/targets/xtensa*-linux-user.mak.

Do not raise SIGILL for user-only unconditionally.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

target/mips: Restrict semihosting tests to system mode

We do not set CONFIG_SEMIHOSTING in
configs/targets/mips*-linux-user.mak.

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

accel/tcg: Use libuser_ss and libsystem_ss

While some of these files are built exactly once, due
to being in only libuser_ss or libsystem_ss, some of
the includes that they depend on require CONFIG_USER_ONLY.
So make use of the common infrastructure to allow that.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

gdbstub: Move syscalls.c out of common_ss

Copy to libuser_ss and libsystem_ss.
This file uses semihosting/semihost.h, which has separate
implementations with and without CONFIG_USER_ONLY.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

meson: Introduce top-level libuser_ss and libsystem_ss

We already have two subdirectories for which we need
to build files twice, for user vs system modes.
Move this handling to the top level.

This cannot be combined with user_ss or system_ss,
because the formulation has not been extended to support
configuration symbols.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

exec: Restrict memory-internal.h to system/

Only file units within the system/ directory need access to
"memory-internal.h". Restrict its scope by moving it there.

The comment from commit 9d70618c684 ("memory-internal.h:
Remove obsolete claim that header is obsolete") is now obsolete,
remove it.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317161329.40300-3-philmd@linaro.org>

accel/tcg: Remove unnecesary inclusion of memory-internal.h in cputlb.c

At some point cputlb.c stopped depending on the
"exec/memory-internal.h" header. Clean that now.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317161329.40300-2-philmd@linaro.org>

include/system: Move exec/ramblock.h to system/ramblock.h

Convert the existing includes with sed.

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

include/system: Move exec/ram_addr.h to system/ram_addr.h

Convert the existing includes with sed.

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

include/system: Move exec/ioport.h to system/ioport.h

Convert the existing includes with sed.

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

include/system: Move exec/address-spaces.h to system/address-spaces.h

Convert the existing includes with sed.

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

include/system: Move exec/memory.h to system/memory.h

Convert the existing includes with

  sed -i ,exec/memory.h,system/memory.h,g

Move the include within cpu-all.h into a !CONFIG_USER_ONLY block.

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

include/exec: Split out mmap-lock.h

Split out mmap_lock, et al from page-protection.h
to a new header.

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

accel/tcg: Remove mmap_lock/unlock from watchpoint.c

The mmap_lock is user-only, whereas watchpoint.c
is only compiled for system mode.

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

accel/tcg: Implement translator_ld*_end

Add a new family of translator load functions which take
an absolute endianness value in the form of MO_BE/MO_LE.
Expand the other translator_ld* functions on top of this.
Remove exec/tswap.h from translator.c.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

accel/tcg: Use cpu_ld*_code_mmu in translator.c

Cache the mmu index in DisasContextBase.
Perform the read on host endianness, which lets us
share code with the translator_ld fast path.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

accel/tcg: Perform aligned atomic reads in translator_ld

Perform aligned atomic reads in translator_ld, if possible.
According to

https://lore.kernel.org/qemu-devel/20240607101403.1109-1-jim.shu@sifive.com/

this is required for RISC-V Ziccif.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

include/exec: Inline *_code memory operations

These need to be per-target for 'abi_ptr' and endianness.
These expand inline to the *_mmu api with a lookup of the
target's cpu_mmu_index() and ra == 0.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

include/exec: Inline *_data memory operations

These need to be per-target for 'abi_ptr'.  Expand inline to
the *_data_ra api with ra == 0.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

include/exec: Inline *_data_ra memory operations

These need to be per-target for 'abi_ptr'.  Expand inline to
the *_mmuidx_ra api with a lookup of the target's cpu_mmu_index().

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

include/exec: Inline *_mmuidx_ra memory operations

These need to be per-target for 'abi_ptr'.  Expand inline to
the *_mmu api with trivial massaging of the arguments.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

include/exec: Split out accel/tcg/cpu-mmu-index.h

The implementation of cpu_mmu_index was split between cpu-common.h
and cpu-all.h, depending on CONFIG_USER_ONLY.  We already have the
plumbing common to user and system mode.  Using MMU_USER_IDX
requires the cpu.h for a specific target, and so is restricted to
when we're compiling per-target.

Include the new header only where needed.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

include/exec: Split out cpu-ldst-common.h

Split out the *_mmu api, which no longer uses
target specific argument types.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

include/exec: Use vaddr for *_mmu guest memory access routines

Use vaddr only for the newest api, because it has the least
number of uses and therefore is the easiest to audit.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

accel/tcg: Fix cpu_ld*_code_mmu for user mode

These routines are buggy in multiple ways:
  - Use of target-endian loads, then a bswap that
    depends on the host endiannness.
  - A non-unwinding code load must set_helper_retaddr 1,
    which is magic within adjust_signal_pc.
  - cpu_ldq_code_mmu used MMU_DATA_LOAD

The bugs are hidden because all current uses of cpu_ld*_code_mmu
are from system mode.

Fixes: 2899062614a ("accel/tcg: Add cpu_ld*_code_mmu")
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

accel/tcg: Build plugin-gen.c once

We assert that env immediately follows CPUState in cpu-all.h.
Change the offsetof expressions to be based on CPUState instead
of ArchCPU.

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

accel/tcg: Build user-exec-stub.c once

CONFIG_USER_ONLY == !CONFIG_SYSTEM_ONLY.
Therefore it's cleaner to just add to user_ss.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

system/ioport: make compilation unit common

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-19-pierrick.bouvier@linaro.org>

system/memory: make compilation unit common

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-18-pierrick.bouvier@linaro.org>

include/exec/memory: move devend functions to memory-internal.h

Only system/physmem.c and system/memory.c use those functions, so we can
move then to internal header.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-17-pierrick.bouvier@linaro.org>

include/exec/memory: extract devend_big_endian from devend_memop

we'll use it in system/memory.c.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-16-pierrick.bouvier@linaro.org>

system/physmem: compilation unit is now common to all targets

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-15-pierrick.bouvier@linaro.org>

system/xen: remove inline stubs

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-14-pierrick.bouvier@linaro.org>

hw/xen: add stubs for various functions

Those symbols are used by system/physmem.c, and are called only if
xen_enabled() (which happens only if CONFIG_XEN is set and xen is
available).

So we can crash the stubs in case those are called, as they are linked
only when CONFIG_XEN is not set.

Acked-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Anthony PERARD <anthony.perard@vates.tech>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-13-pierrick.bouvier@linaro.org>

exec/ram_addr: call xen_hvm_modified_memory only if xen is enabled

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-12-pierrick.bouvier@linaro.org>

system/kvm: make kvm_flush_coalesced_mmio_buffer() accessible for common code

This function is used by system/physmem.c will be turn into common code
in next commit.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-11-pierrick.bouvier@linaro.org>

exec/ram_addr: remove dependency on cpu.h

Needed so compilation units including it can be common.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-10-pierrick.bouvier@linaro.org>

exec/memory-internal: remove dependency on cpu.h

Needed so compilation units including it can be common.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-9-pierrick.bouvier@linaro.org>

exec/exec-all: remove dependency on cpu.h

Previous commit changed files relying transitively on it.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-8-pierrick.bouvier@linaro.org>

codebase: prepare to remove cpu.h from exec/exec-all.h

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-7-pierrick.bouvier@linaro.org>

exec/memory.h: make devend_memop "target defines" agnostic

Will allow to make system/memory.c common later.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-6-pierrick.bouvier@linaro.org>

exec/memory_ldst_phys: extract memory_ldst_phys declarations from cpu-all.h

They are now accessible through exec/memory.h instead, and we make sure
all variants are available for common or target dependent code.

Move stl_phys_notdirty function as well.
Cached endianness agnostic version rely on st/ld*_p, which is available
through tswap.h.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-5-pierrick.bouvier@linaro.org>

exec/memory_ldst: extract memory_ldst declarations from cpu-all.h

They are now accessible through exec/memory.h instead, and we make sure
all variants are available for common or target dependent code.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-4-pierrick.bouvier@linaro.org>

exec/tswap: implement {ld,st}.*_p as functions instead of macros

Defining functions allows to use them from common code, by not depending
on TARGET_BIG_ENDIAN.
Remove previous macros from exec/cpu-all.h.
By moving them out of cpu-all.h, we'll be able to break dependency on
cpu.h for memory related functions coming in next commits.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-3-pierrick.bouvier@linaro.org>

exec/tswap: target code can use TARGET_BIG_ENDIAN instead of target_words_bigendian()

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-2-pierrick.bouvier@linaro.org>

Merge tag 'pull-avr-20250422' of https://gitlab.com/rth7680/qemu into staging

target/avr: Fix buffer read in avr_print_insn
target/avr: Improve decode of LDS, STS
target/avr: Move cpu register accesses into system memory
target/avr: Increase TARGET_PAGE_BITS to 10

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* tag 'pull-avr-20250422' of https://gitlab.com/rth7680/qemu:
  target/avr: Increase TARGET_PAGE_BITS to 10
  hw/avr: Prepare for TARGET_PAGE_SIZE > 256
  target/avr: Use do_stb in avr_cpu_do_interrupt
  target/avr: Use cpu_stb_mmuidx_ra in helper_fullwr
  target/avr: Remove NUMBER_OF_IO_REGISTERS
  target/avr: Move cpu register accesses into system memory
  target/avr: Add defines for i/o port registers
  target/avr: Remove OFFSET_CPU_REGISTERS
  target/avr: Improve decode of LDS, STS

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

Merge tag 'pull-request-2025-04-23' of https://gitlab.com/thuth/qemu into staging

* Remove the obsolete s390-ccw-virtio-2.9 machine type
* Prepare the dump-skeys QMP command for the universal binary project
* Add compat machine types for 10.1
* Convert the remaining Avocado tests to the functional framework
* Some more small fixes for the functional tests

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# gpg:                issuer "thuth@redhat.com"
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full]
# gpg:                 aka "Thomas Huth <thuth@redhat.com>" [full]
# gpg:                 aka "Thomas Huth <huth@tuxfamily.org>" [full]
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* tag 'pull-request-2025-04-23' of https://gitlab.com/thuth/qemu: (29 commits)
  MAINTAINERS: Add functional tests that are not covered yet
  tests/functional: Remove unnecessary import statements
  tests/functional: Remove semicolons at the end of lines
  Remove the remainders of the Avocado tests
  docs/devel/testing: Dissolve the ci-definitions.rst.inc file
  gitlab-ci: Update QEMU_JOB_AVOCADO and QEMU_CI_AVOCADO_TESTING
  tests/functional: Convert the SMMU test to the functional framework
  tests/functional: Use the tuxrun kernel for the aarch64 replay test
  tests/functional: Use the tuxrun kernel for the x86 replay test
  tests/avocado: Remove the boot_linux.py tests
  tests/functional: Convert the 64-bit big endian Wheezy mips test
  tests/functional: Convert the 64-bit little endian Wheezy mips test
  tests/functional: Convert the 32-bit little endian Wheezy mips test
  tests/functional: Convert the 32-bit big endian Wheezy mips test
  tests/avocado: Remove the LinuxKernelTest class
  tests/functional: Convert the i386 replay avocado test
  tests/functional: Convert reverse_debugging tests to the functional framework
  tests/functional: Move the check for the parameters from avocado to functional
  gitlab-ci: Remove the avocado tests from the CI pipelines
  tests/functional/test_vnc: skip test if no crypto backend available
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* target/i386: Fix model number of Zhaoxin YongFeng vCPU template
* target/i386: Reset parked vCPUs together with the online ones
* scsi: add conversion from ENODEV to sense
* target/i386: tweaks to flag handling
* target/i386: tweaks to SHLD/SHRD code generation
* target/i386: remove some global temporaries from TCG
* target/i386: pull emulator outside target/i386/hvf
* host/i386: consolidate getting host CPU vendor
* rust/hpet: preparation for migration support
* rust/pl011: bring over more commits from C version

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# gpg:                issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>" [full]
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
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* tag 'for-upstream' of https://gitlab.com/bonzini/qemu: (34 commits)
  rust/hw/char/pl011: Extract DR write logic into separate function
  rust/hw/char/pl011: Extract extract DR read logic into separate function
  rust/vmstate_test: Fix typo in test_vmstate_macro_array_of_pointer_wrapped()
  rust/hpet: Fix a clippy error
  rust/hpet: convert HPETTimer index to u8 type
  rust/hpet: convert num_timers to u8 type
  i386/cpu: Consolidate the helper to get Host's vendor
  target/i386/emulate: remove flags_mask
  MAINTAINERS: add an entry for the x86 instruction emulator
  target/i386: move x86 instruction emulator out of hvf
  target/i386/emulate: add a panic.h
  target/i386: add a directory for x86 instruction emulator
  target/i386/hvf: rename some include guards
  target/i386/hvf: drop unused headers
  target/i386: rename lazy flags field and its type
  target/i386/hvf: provide and use simulate_{wrmsr, rdmsr} in emul_ops
  target/i386/hvf: provide and use write_mem in emul_ops
  target/i386/hvf: use emul_ops->read_mem in x86_emu.c
  target/i386: rename hvf_mmio_buf to emu_mmio_buf
  target/i386/hvf: provide and use handle_io in emul_ops
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

Merge tag 'ipmi-for-qemu-10.0' of https://github.com/cminyard/qemu into staging

Some minor fixes for various things

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# gpg: Good signature from "Corey Minyard <cminyard@mvista.com>" [unknown]
# gpg:                 aka "Corey Minyard <corey@minyard.net>" [unknown]
# gpg:                 aka "Corey Minyard <minyard@mvista.com>" [unknown]
# gpg:                 aka "Corey Minyard <minyard@acm.org>" [unknown]
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* tag 'ipmi-for-qemu-10.0' of https://github.com/cminyard/qemu:
  ipmi/bmc-sim: add error handling for 'Set BMC Global Enables' command
  ipmi/bmc-sim: implement watchdog dont log flag
  ipmi/bmc-sim: Add 'Get Channel Info' command
  ipmi: add fwinfo to pci ipmi devices
  ipmi/pci-ipmi-bt: Rename copy-paste variables
  hw/ipmi: Move vmsd registration to device class

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

rust/hw/char/pl011: Extract DR write logic into separate function

- Split `write()` DR case into `write_data_register()`

Signed-off-by: Rakesh Jeyasingh <rakeshjb010@gmail.com>
Link: https://lore.kernel.org/r/20250407181327.171563-3-rakeshjb010@gmail.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

rust/hw/char/pl011: Extract extract DR read logic into separate function

- Split `read()` DR case into `read_data_register()`

Signed-off-by: Rakesh Jeyasingh <rakeshjb010@gmail.com>
Link: https://lore.kernel.org/r/20250407181327.171563-2-rakeshjb010@gmail.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

rust/vmstate_test: Fix typo in test_vmstate_macro_array_of_pointer_wrapped()

test_vmstate_macro_array_of_pointer_wrapped() tests the 3rd element, so
fix the index.

Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250414144943.1112885-5-zhao1.liu@intel.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

rust/hpet: Fix a clippy error

Carge clippy complained about:

error: casts from `u8` to `u32` can be expressed infallibly using `From`

So use `From` to convert `u8` to `u32`.

Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250414144943.1112885-10-zhao1.liu@intel.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

rust/hpet: convert HPETTimer index to u8 type

The C version of HPET uses the uint8_t type for timer index ("tn"), and
usize type in Rust version will break migration between the C and Rust
versions.

So convert HPETTimer index' type to u8 (consistent with the C version of
HPET) to make it friendly for vmstate support.

Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250414144943.1112885-8-zhao1.liu@intel.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

rust/hpet: convert num_timers to u8 type

The C version of HPET uses the uint8_t type for num_timers, and usize
type in Rust version will break migration between the C and Rust
versions.

So convert num_timers' type to u8 (consistent with the C version of
HPET) to make it friendly for vmstate support.

Note the commit 7bda68e8e2b0 ("qdev, rust/hpet: fix type of HPET
'timers property") supports the usize type property, but the uint8
property has to be re-supported now.

Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250414144943.1112885-7-zhao1.liu@intel.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

MAINTAINERS: Add functional tests that are not covered yet

Some functional tests are currently not covered by the entries
in MAINTAINERS yet, so scripts/get_maintainers.pl fails to suggest
the right people who should be CC:-ed for related patches.
Add the uncovered tests to the right sections to close this gap.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20250414121520.213665-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/functional: Remove unnecessary import statements

pylint complains about these unnecessary import statements,
so let's remove them.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20250414145457.261734-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/functional: Remove semicolons at the end of lines

Yes, we are all C coders who try to write Python code for testing...
but still, let's better avoid semicolons at the end of the lines
to keep "pylint" happy!

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Message-ID: <20250327201305.996241-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

Remove the remainders of the Avocado tests

Now that all Avocado tests have been converted to or been replaced by
other functional tests, we can delete the remainders of the Avocado
tests from the QEMU source tree.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250414113031.151105-16-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

docs/devel/testing: Dissolve the ci-definitions.rst.inc file

This file was meant for defining the vocabulary for our testing
efforts, but it did not age well: First, the definitions are not
only about the CI part, but also about testing in general, so most
of the information should rather reside in main.rst instead.
Second, some vocabulary has never been really adopted by the QEMU
project, for example we never really use the word "system testing"
since "system" rather means the system emulator binaries in the
QEMU project (and we also don't do any testing with other components
like libvirt and virt-managers here). It also defines that the qtests
are the "functional" tests in QEMU, which is not really up to date
anymore after the "tests/functional" framework has been introduced
a couple of months ago (FWIW, the qtests could rather be seen as a
mix between unit testing and functional testing).

To solve this problem, move the useful parts of this file into
main.rst and directly into ci.rst, and drop the ones (like "system
testing") that we don't really need anymore.

Message-ID: <20250314085959.1585568-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

gitlab-ci: Update QEMU_JOB_AVOCADO and QEMU_CI_AVOCADO_TESTING

Since we don't run the Avocado jobs in the CI anymore, rename
these variables to QEMU_JOB_FUNCTIONAL and QEMU_CI_FUNCTIONAL.

Also, there was a mismatch between the documentation and the
implementation of QEMU_CI_AVOCADO_TESTING: While the documentation
said that you had to "Set this variable to have the tests using the
Avocado framework run automatically", you indeed needed to set it
to make the pipelines appear in your dashboard - but they were never
run automatically in forks and had to be triggered manually. Let's
improve this now: No need to hide these pipelines from the users
by default anymore (the functional tests should be stable enough
nowadays), and rather allow the users to run the pipelines auto-
matically with this switch now instead, as was documented.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250414113031.151105-15-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/functional: Convert the SMMU test to the functional framework

This test was using cloudinit and a "dnf install" command in the guest
to exercise the NIC with SMMU enabled. Since we don't have the cloudinit
stuff in the functional framework and we should not rely on having access
to external networks (once our ASSETs have been cached), we rather boot
into the initrd first, manually mount the root disk and then use the
check_http_download() function from the functional framework here instead
for testing whether the network works as expected.

Unfortunately, there seems to be a small race when using the files
from Fedora 33: To enter the initrd shell, we have to send a "return"
once. But it does not seem to work if we send it too early. Using a
sleep(0.2) makes it work reliably for me, but to make it even more
unlikely to trigger this situation, let's better limit the Fedora 33
tests to only run with KVM.

Finally, while we're at it, we also add some lines for testing writes
to the hard disk, as we already do it in the test_intel_iommu test.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Message-ID: <20250414113031.151105-14-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/functional: Use the tuxrun kernel for the aarch64 replay test

This way we can do a full boot in record-replay mode and
should get a similar test coverage compared to the old
replay test from tests/avocado/replay_linux.py.

Since the aarch64 test was the last avocado test in the
tests/avocado/replay_linux.py file, we can remove this
file now completely.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20250414113031.151105-13-thuth@redhat.com>

tests/functional: Use the tuxrun kernel for the x86 replay test

This way we can do a full boot in record-replay mode and
should get a similar test coverage compared to the old
replay test from tests/avocado/replay_linux.py. Thus remove
the x86 avocado replay_linux test now.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250414113031.151105-12-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/avocado: Remove the boot_linux.py tests

These tests are based on the cloudinit functions from Avocado.
The cloudinit is very, very slow compared to our other tests,
so most of these Avocado tests have either been disabled by default
with a decorator, or have been marked to only run with KVM.

We won't include this sluggish cloudinit stuff in the functional
framework, and we've already got plenty of other tests there that
check pretty much the same things, so let's simply get rid of these
old tests now.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250414113031.151105-11-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/functional: Convert the 64-bit big endian Wheezy mips test

Reuse the test function from the 32-bit big endian test to easily
convert the 64-bit big endian Wheezy mips test.

Since this was the last test in tests/avocado/linux_ssh_mips_malta.py,
we can remove this avocado file now, too.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250414113031.151105-10-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/functional: Convert the 64-bit little endian Wheezy mips test

Reuse the test function from the 32-bit big endian test to easily
convert the 64-bit little endian Wheezy mips test.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250414113031.151105-9-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/functional: Convert the 32-bit little endian Wheezy mips test

Reuse the test function from the big endian test to easily
convert the 32-bit little endian Wheezy mips test.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250414113031.151105-8-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/functional: Convert the 32-bit big endian Wheezy mips test

The test checks some entries in /proc and the output of some commands ...
we put these checks into exportable functions now so that they can
be reused more easily.

Additionally the linux_ssh_mips_malta.py uses SSH to test the networking
of the guest. Since we don't have a SSH module in the functional
framework yet, let's use the check_http_download() function here instead.

And while we're at it, also switch the NIC to e1000 now to get some more
test coverage, since the "pcnet" device is already tested in the test
test_mips_malta_cpio.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250414113031.151105-7-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/avocado: Remove the LinuxKernelTest class

All tests that used this class have been converted to the functional
framework, so we can remove the boot_linux_console.py file now.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250414113031.151105-6-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/functional: Convert the i386 replay avocado test

Since this was the last test in tests/avocado/replay_kernel.py,
we can remove that Avocado file now.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250414113031.151105-5-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/functional: Convert reverse_debugging tests to the functional framework

These tests are using the gdb-related library functions from the
Avocado framework which we don't have in the functional framework
yet. So for the time being, keep those imports and skip the test
if the Avocado framework is not installed on the host.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250414113031.151105-4-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/functional: Move the check for the parameters from avocado to functional

test_x86_64_pc in tests/avocado/boot_linux_console.py only checks
whether the kernel parameters have correctly been passed to the
kernel in the guest by looking for them in the console output of the
guest. Let's move that to the functional test framework now, but
instead of doing it in a separate test, let's do it for all tuxrun
tests instead, so it is done automatically for all targets that have
a tuxrun test.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250414113031.151105-3-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

gitlab-ci: Remove the avocado tests from the CI pipelines

We are going to move the remaining Avocado tests step by step
into the functional test framework. Unfortunately, Avocado fails
with an error if it cannot determine a test to run, so disable
the tests here now to avoid failures in the Gitlab-CI during the
next steps.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250414113031.151105-2-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/functional/test_vnc: skip test if no crypto backend available

The test_change_password test will fail if no cryptographic backend is
available (e.g. if QEMU was built on a system with no cryptographic
library development packages installed); just skip the test in that
case.

Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20250414093732.220498-1-cohuck@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

hw: add compat machines for 10.1

Add 10.1 machine types for arm/i440fx/m68k/q35/s390x/spapr.

Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20250414094543.221241-1-cohuck@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

qapi/machine: Make @dump-skeys command generic

Reduce misc-target.json by one target specific command.

Error message is returned for machines not implementing
TYPE_DUMP_SKEYS_INTERFACE:

  $ qemu-system-aarch64 -M virt -S -qmp stdio
  {"QMP": {"version": {"qemu": {"micro": 50, "major": 9}}, "capabilities": ["oob"]}}
  { "execute": "qmp_capabilities" }
  {"return": {}}
  { "execute": "dump-skeys", "arguments": { "filename": "/tmp/foo" }  }
  {"error": {"class": "GenericError", "desc": "Storage keys information not available for this architecture"}}

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20250310151414.11550-5-philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

hw/s390x/ccw: Have CCW machine implement a qmp_dump_skeys() callback

In preparation to make @dump-skeys command generic,
extract s390_qmp_dump_skeys() out of qmp_dump_skeys().
Register it as CCW qmp_dump_skeys() callback.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Message-ID: <20250310151414.11550-4-philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

hw/s390x/skeys: Introduce TYPE_DUMP_SKEYS_INTERFACE

The storage keys are part of the machine memory.

Introduce the TYPE_DUMP_SKEYS_INTERFACE type,
allowing machine using storage keys to dump them
when a DumpSKeysInterface::qmp_dump_skeys() callback
is provided.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20250310151414.11550-3-philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

hw/s390x/skeys: Declare QOM types using DEFINE_TYPES() macro

When multiple QOM types are registered in the same file,
it is simpler to use the the DEFINE_TYPES() macro. In
particular because type array declared with such macro
are easier to review.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20250310151414.11550-2-philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

hw/intc/s390_flic: Remove the obsolete migration_enabled flag

Now that the machine types that set the migration_enabled flag to
false are gone, we can remove it and the related code.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20250115073819.15452-5-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

hw/s390x/s390-stattrib: Remove the old migration_enabled flag

Now that the machine types that set the migration_enabled flag to
false are gone, we can remove it and the related code.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20250115073819.15452-4-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

hw/s390x/css: Remove the obsolete "css_migration_enabled" variable

Now that the s390-ccw-virtio-2.9 machine type has been removed, we
don't need the "css_migration_enabled" variable anymore and can remove
the related code.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20250115073819.15452-3-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

hw/s390x/s390-virtio-ccw: Remove the deprecated 2.9 machine type

The s390-ccw-virtio-2.9 machine is older than 6 years, so according to
our machine support policy, it can be removed now.

Message-ID: <20250115073819.15452-2-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

target/avr: Increase TARGET_PAGE_BITS to 10

Now that we can handle the MCU allocating only a portion of the
first page to i/o, increase the page size.  Choose 10 as larger
than the i/o on every MCU, just so that this path is tested.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

hw/avr: Prepare for TARGET_PAGE_SIZE > 256

If i/o does not cover the entire first page, allocate a portion
of ram as an i/o device, so that the entire first page is i/o.

While memory_region_init_ram_device_ptr is happy to allocate
the RAMBlock, it does not register the ram for migration.
Do this by hand.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>