Merge tag 'pull-tcg-20230511-2' of https://gitlab.com/rth7680/qemu into staging

target/m68k: Fix gen_load_fp regression
accel/tcg: Ensure fairness with icount
disas: Move disas.c into the target-ind

Merge tag 'pull-tcg-20230511-2' of https://gitlab.com/rth7680/qemu into staging

target/m68k: Fix gen_load_fp regression
accel/tcg: Ensure fairness with icount
disas: Move disas.c into the target-independent source sets
tcg: Use common routines for calling slow path helpers
tcg/*: Cleanups to qemu_ld/st constraints
tcg: Remove TARGET_ALIGNED_ONLY
accel/tcg: Reorg system mode load/store helpers

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# gpg: Signature made Thu 11 May 2023 11:43:34 AM BST
# gpg: using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg: issuer "richard.henderson@linaro.org"
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [ultimate]

* tag 'pull-tcg-20230511-2' of https://gitlab.com/rth7680/qemu: (53 commits)
target/loongarch: Do not include tcg-ldst.h
accel/tcg: Reorg system mode store helpers
accel/tcg: Reorg system mode load helpers
accel/tcg: Introduce tlb_read_idx
accel/tcg: Add cpu_in_serial_context
tcg: Remove TARGET_ALIGNED_ONLY
target/sh4: Remove TARGET_ALIGNED_ONLY
target/sh4: Use MO_ALIGN where required
target/nios2: Remove TARGET_ALIGNED_ONLY
target/mips: Remove TARGET_ALIGNED_ONLY
target/mips: Use MO_ALIGN instead of 0
target/mips: Add missing default_tcg_memop_mask
target/mips: Add MO_ALIGN to gen_llwp, gen_scwp
tcg/s390x: Simplify constraints on qemu_ld/st
tcg/s390x: Use ALGFR in constructing softmmu host address
tcg/riscv: Simplify constraints on qemu_ld/st
tcg/ppc: Remove unused constraint J
tcg/ppc: Remove unused constraints A, B, C, D
tcg/ppc: Adjust constraints on qemu_ld/st
tcg/ppc: Reorg tcg_out_tlb_read
...

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

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accel/tcg/tcg-accel-ops-rr: ensure fairness with icount

The round-robin scheduler will iterate over the CPU list with an
assigned budget until the next timer expiry and may exit early because
of a T

accel/tcg/tcg-accel-ops-rr: ensure fairness with icount

The round-robin scheduler will iterate over the CPU list with an
assigned budget until the next timer expiry and may exit early because
of a TB exit. This is fine under normal operation but with icount
enabled and SMP it is possible for a CPU to be starved of run time and
the system live-locks.

For example, booting a riscv64 platform with '-icount
shift=0,align=off,sleep=on -smp 2' we observe a livelock once the kernel
has timers enabled and starts performing TLB shootdowns. In this case
we have CPU 0 in M-mode with interrupts disabled sending an IPI to CPU
1. As we enter the TCG loop, we assign the icount budget to next timer
interrupt to CPU 0 and begin executing where the guest is sat in a busy
loop exhausting all of the budget before we try to execute CPU 1 which
is the target of the IPI but CPU 1 is left with no budget with which to
execute and the process repeats.

We try here to add some fairness by splitting the budget across all of
the CPUs on the thread fairly before entering each one. The CPU count
is cached on CPU list generation ID to avoid iterating the list on each
loop iteration. With this change it is possible to boot an SMP rv64
guest with icount enabled and no hangs.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Jamie Iles <quic_jiles@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230427020925.51003-3-quic_jiles@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

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Merge tag 'pull-misc-2022-05-11' of git://repo.or.cz/qemu/armbru into staging

Miscellaneous patches patches for 2022-05-11

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Merge tag 'pull-misc-2022-05-11' of git://repo.or.cz/qemu/armbru into staging

Miscellaneous patches patches for 2022-05-11

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# gpg: Signature made Wed 11 May 2022 07:58:10 AM PDT
# gpg: using RSA key 354BC8B3D7EB2A6B68674E5F3870B400EB918653
# gpg: issuer "armbru@redhat.com"
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" [undefined]
# gpg: aka "Markus Armbruster <armbru@pond.sub.org>" [undefined]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867 4E5F 3870 B400 EB91 8653

* tag 'pull-misc-2022-05-11' of git://repo.or.cz/qemu/armbru:
Clean up decorations and whitespace around header guards
Normalize header guard symbol definition
Clean up ill-advised or unusual header guards
Clean up header guards that don't match their file name

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

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Clean up header guards that don't match their file name

Header guard symbols should match their file name to make guard
collisions less likely.

Cleaned up with scripts/clean-header-guards.pl, follo

Clean up header guards that don't match their file name

Header guard symbols should match their file name to make guard
collisions less likely.

Cleaned up with scripts/clean-header-guards.pl, followed by some
renaming of new guard symbols picked by the script to better ones.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20220506134911.2856099-2-armbru@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
[Change to generated file ebpf/rss.bpf.skeleton.h backed out]

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Merge remote-tracking branch 'remotes/rth-gitlab/tags/pull-tcg-20210205' into staging

TCGCPUOps cleanups (claudio)
tcg/s390 compare fix (phil)
tcg/aarch64 rotli_vec fix
tcg/tci cleanups and fixes

#

Merge remote-tracking branch 'remotes/rth-gitlab/tags/pull-tcg-20210205' into staging

TCGCPUOps cleanups (claudio)
tcg/s390 compare fix (phil)
tcg/aarch64 rotli_vec fix
tcg/tci cleanups and fixes

# gpg: Signature made Fri 05 Feb 2021 22:55:10 GMT
# gpg: using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg: issuer "richard.henderson@linaro.org"
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [full]
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A 05C0 64DF 38E8 AF7E 215F

* remotes/rth-gitlab/tags/pull-tcg-20210205: (46 commits)
accel: introduce AccelCPUClass extending CPUClass
accel: replace struct CpusAccel with AccelOpsClass
accel: extend AccelState and AccelClass to user-mode
cpu: tcg_ops: move to tcg-cpu-ops.h, keep a pointer in CPUClass
cpu: move debug_check_watchpoint to tcg_ops
cpu: move adjust_watchpoint_address to tcg_ops
physmem: make watchpoint checking code TCG-only
cpu: move do_unaligned_access to tcg_ops
cpu: move cc->transaction_failed to tcg_ops
cpu: move cc->do_interrupt to tcg_ops
target/arm: do not use cc->do_interrupt for KVM directly
cpu: Move debug_excp_handler to tcg_ops
cpu: Move tlb_fill to tcg_ops
cpu: Move cpu_exec_* to tcg_ops
cpu: Move synchronize_from_tb() to tcg_ops
accel/tcg: split TCG-only code from cpu_exec_realizefn
target/riscv: remove CONFIG_TCG, as it is always TCG
cpu: Introduce TCGCpuOperations struct
tcg/tci: Remove TCG_CONST
tcg/tci: Fix TCG_REG_R4 misusage
...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

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accel: replace struct CpusAccel with AccelOpsClass

This will allow us to centralize the registration of
the cpus.c module accelerator operations (in accel/accel-softmmu.c),
and trigger it automatica

accel: replace struct CpusAccel with AccelOpsClass

This will allow us to centralize the registration of
the cpus.c module accelerator operations (in accel/accel-softmmu.c),
and trigger it automatically using object hierarchy lookup from the
new accel_init_interfaces() initialization step, depending just on
which accelerators are available in the code.

Rename all tcg-cpus.c, kvm-cpus.c, etc to tcg-accel-ops.c,
kvm-accel-ops.c, etc, matching the object type names.

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Message-Id: <20210204163931.7358-18-cfontana@suse.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...