Move has_work() from CPUClass to SysemuCPUOps, simplifying
xtensa_cpu_has_work() by directly using CPU env.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250125170125.32855-24-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250125170125.32855-23-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250125170125.32855-22-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250125170125.32855-21-philmd@linaro.org>
Move has_work() from CPUClass to SysemuCPUOps, move
s390_cpu_has_work() to cpu-system.c so it is only build
for system emulation binaries, restrict functions not
used anymore on user emulation in interrupt.c.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250125170125.32855-20-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250125170125.32855-19-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250125170125.32855-18-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250125170125.32855-17-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250125170125.32855-16-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250125170125.32855-15-philmd@linaro.org>
Move has_work() from CPUClass to SysemuCPUOps and
cpu_mips_hw_interrupts_enabled() to system.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250125170125.32855-14-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250125170125.32855-13-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250125170125.32855-12-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250125170125.32855-11-philmd@linaro.org>
Move has_work() from CPUClass to SysemuCPUOps,
restrict x86_cpu_pending_interrupt() to system.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250125170125.32855-10-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250125170125.32855-9-philmd@linaro.org>
Remove as unreachable code.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Brian Cain <brian.cain@oss.qualcomm.com>
Message-Id: <20250125170125.32855-8-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250125170125.32855-7-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250125170125.32855-6-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250125170125.32855-5-philmd@linaro.org>
CpuState caches its CPUClass since commit 6fbdff8706
("cpu: cache CPUClass in CPUState for hot code paths"),
use it.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250122093028.52416-11-philmd@linaro.org>
Move CPU TLB related methods to "exec/cputlb.h".
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-ID: <20241114011310.3615-19-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Move CPU TLB related methods to "exec/cputlb.h".
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20241114011310.3615-18-philmd@linaro.org>
Move CPU TLB related methods to "exec/cputlb.h".
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20241114011310.3615-17-philmd@linaro.org>
Move CPU TLB related methods to "exec/cputlb.h".
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20241114011310.3615-16-philmd@linaro.org>
Functions which modify TCG globals must not be marked TCG_CALL_NO_WG,
as that tells the optimizer that TCG global values already loaded in
machine registers are still valid, and so any changes which these
helpers make to the CPU state may be ignored.
The target/rx code chooses to put (among other things) all the PSW
bits and also ACC into globals, so the NO_WG flag on various
functions that touch the PSW or ACC is incorrect and must be removed.
This includes all the floating point helper functions, because
update_fpsw() will update PSW Z and S.
Signed-off-by: Keith Packard <keithp@keithp.com>
[PMM: Clarified commit message]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The documentation says the vector is at 0xffffff80, instead of the
previous value of 0xffffffc0. That value must have been a bug because
the standard vector values (20, 21, 23, 25, 30) were all
past the end of the array.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
In debug_helper.c we provide a few dummy versions of
debug registers:
* DBGVCR (AArch32 only): enable bits for vector-catch
debug events
* MDCCINT_EL1: interrupt enable bits for the DCC
debug communications channel
* DBGVCR32_EL2: the AArch64 accessor for the state in
DBGVCR
We implemented these only to stop Linux crashing on startup,
but we chose to implement them as ARM_CP_NOP. This worked
for Linux where it only cares about trying to write to these
registers, but is very confusing behaviour for anything that
wants to read the registers (perhaps for context state switches),
because the destination register will be left with whatever
random value it happened to have before the read.
Model these registers instead as RAZ.
Fixes: 5e8b12ffbb ("target-arm: Implement minimal DBGVCR, OSDLR_EL1, MDCCSR_EL0")
Fixes: 5dbdc4342f ("target-arm: Implement dummy MDCCINT_EL1")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2708
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20250228162424.1917269-1-peter.maydell@linaro.org
All the callers of op_addr_rr_post() and op_addr_ri_post() now pass in
zero for the address_offset, so we can remove that argument.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20250227142746.1698904-4-peter.maydell@linaro.org
Our STRD implementation doesn't correctly implement the requirement:
* if the address is 8-aligned the access must be a 64-bit
single-copy atomic access, not two 32-bit accesses
Rewrite the handling of STRD to use a single tcg_gen_qemu_st_i64()
of a value produced by concatenating the two 32 bit source registers.
This allows us to get the atomicity right.
As with the LDRD change, now that we don't update 'addr' in the
course of performing the store we need to adjust the offset
we pass to op_addr_ri_post() and op_addr_rr_post().
Cc: qemu-stable@nongnu.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20250227142746.1698904-3-peter.maydell@linaro.org
Our LDRD implementation is wrong in two respects:
* if the address is 4-aligned and the load crosses a page boundary
and the second load faults and the first load was to the
base register (as in cases like "ldrd r2, r3, [r2]", then we
must not update the base register before taking the fault
* if the address is 8-aligned the access must be a 64-bit
single-copy atomic access, not two 32-bit accesses
Rewrite the handling of the loads in LDRD to use a single
tcg_gen_qemu_ld_i64() and split the result into the destination
registers. This allows us to get the atomicity requirements
right, and also implicitly means that we won't update the
base register too early for the page-crossing case.
Note that because we no longer increment 'addr' by 4 in the course of
performing the LDRD we must change the adjustment value we pass to
op_addr_ri_post() and op_addr_rr_post(): it no longer needs to
subtract 4 to get the correct value to use if doing base register
writeback.
STRD has the same problem with not getting the atomicity right;
we will deal with that in the following commit.
Cc: qemu-stable@nongnu.org
Reported-by: Stu Grossman <stu.grossman@gmail.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20250227142746.1698904-2-peter.maydell@linaro.org
As we are about to add more physical and virtual timers let's make it
clear what each timer does.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20250204125009.2281315-8-peter.maydell@linaro.org
[PMM: Add timer register name prefix to each comment]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
When FEAT_SEL2 was implemented the SEL2 timers were missed. This
shows up when building the latest Hafnium with SPMC_AT_EL=2. The
actual implementation utilises the same logic as the rest of the
timers so all we need to do is:
- define the timers and their access functions
- conditionally add the correct system registers
- create a new accessfn as the rules are subtly different to the
existing secure timer
Fixes: e9152ee91c (target/arm: add ARMv8.4-SEL2 system registers)
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20250204125009.2281315-7-peter.maydell@linaro.org
Cc: qemu-stable@nongnu.org
Cc: Andrei Homescu <ahomescu@google.com>
Cc: Arve Hjønnevåg <arve@google.com>
Cc: Rémi Denis-Courmont <remi.denis.courmont@huawei.com>
[PMM: CP_ACCESS_TRAP_UNCATEGORIZED -> CP_ACCESS_UNDEFINED;
offset logic now in gt_{indirect,direct}_access_timer_offset() ]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
When reading or writing the timer registers, sometimes we need to
apply one of the timer offsets. Specifically, this happens for
direct reads of the counter registers CNTPCT_EL0 and CNTVCT_EL0 (and
their self-synchronized variants CNTVCTSS_EL0 and CNTPCTSS_EL0). It
also applies for direct reads and writes of the CNT*_TVAL_EL*
registers that provide the 32-bit downcounting view of each timer.
We currently do this with duplicated code in gt_tval_read() and
gt_tval_write() and a special-case in gt_virt_cnt_read() and
gt_cnt_read(). Refactor this so that we handle it all in a single
function gt_direct_access_timer_offset(), to parallel how we handle
the offset for indirect accesses.
The call in the WFIT helper previously to gt_virt_cnt_offset() is
now to gt_direct_access_timer_offset(); this is the correct
behaviour, but it's not immediately obvious that it shouldn't be
considered an indirect access, so we add an explanatory comment.
This commit should make no behavioural changes.
(Cc to stable because the following bugfix commit will
depend on this one.)
Cc: qemu-stable@nongnu.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20250204125009.2281315-6-peter.maydell@linaro.org
Currently we handle CNTV_TVAL_EL02 by calling gt_tval_read() for the
EL1 virt timer. This is almost correct, but the underlying
CNTV_TVAL_EL0 register behaves slightly differently. CNTV_TVAL_EL02
always applies the CNTVOFF_EL2 offset; CNTV_TVAL_EL0 doesn't do so if
we're at EL2 and HCR_EL2.E2H is 1.
We were getting this wrong, because we ended up in
gt_virt_cnt_offset() and did the E2H check.
Factor out the tval read/write calculation from the selection of the
offset, so that we can special case gt_virt_tval_read() and
gt_virt_tval_write() to unconditionally pass CNTVOFF_EL2.
Cc: qemu-stable@nongnu.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20250204125009.2281315-5-peter.maydell@linaro.org
When we added Secure EL2 support, we missed that this needs an update
to the access code for the EL3 physical timer registers. These are
supposed to UNDEF from Secure EL1 when Secure EL2 is enabled.
(Note for stable backporting: for backports to branches where
CP_ACCESS_UNDEFINED is not defined, the old name to use instead
is CP_ACCESS_TRAP_UNCATEGORIZED.)
Cc: qemu-stable@nongnu.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20250204125009.2281315-4-peter.maydell@linaro.org
The CNTVOFF_EL2 offset register should only be applied for accessses
to CNTVCT_EL0 and for the EL1 virtual timer (CNTV_*). We were
incorrectly applying it for the EL2 virtual timer (CNTHV_*).
Cc: qemu-stable@nongnu.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20250204125009.2281315-3-peter.maydell@linaro.org
When we are calculating timer deadlines, the correct definition of
whether or not to apply an offset to the physical count is described
in the Arm ARM DDI4087 rev L.a section D12.2.4.1. This is different
from when the offset should be applied for a direct read of the
counter sysreg.
We got this right for the EL1 physical timer and for the EL1 virtual
timer, but got all the rest wrong: they should be using a zero offset
always.
Factor the offset calculation out into a function that has a comment
documenting exactly which offset it is calculating and which gets the
HYP, SEC, and HYPVIRT cases right.
Cc: qemu-stable@nongnu.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20250204125009.2281315-2-peter.maydell@linaro.org
For LoongArch th min tlb_ps is 12(4KB), for TLB code,
the tlb_ps may be 0,this may case UndefinedBehavior
Add a check-tlb_ps fuction to check tlb_ps,
to make sure the tlb_ps is avalablie. we check tlb_ps
when get the tlb_ps from tlb->misc or CSR bits.
1. cpu reset
set CSR_PWCL.PTBASE and CSR_STLBPS.PS bits a default value
from CSR_PRCFG2;
2. tlb instructions.
some tlb instructions get the tlb_ps from tlb->misc but the
value may has been initialized to 0. we need just check the tlb_ps
skip the function and write a guest log.
3. csrwr instructions.
to make sure CSR_PWCL.PTBASE and CSR_STLBPS.PS bits are avalable,
cheke theses bits and set a default value from CSR_PRCFG2.
Signed-off-by: Song Gao <gaosong@loongson.cn>
Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Message-Id: <20250305063311.830674-3-gaosong@loongson.cn>
some tlb instructions get the tlb_ps from tlb->misc but the
value may has been initialized to 0,just check the tlb_ps skip
the function and write a log.
Signed-off-by: Song Gao <gaosong@loongson.cn>
Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Message-Id: <20250305063311.830674-2-gaosong@loongson.cn>
- Merge "qemu/clang-tsa.h" within "qemu/compiler.h"
- Various cleanups around accelerators initialization code
(better user/system split)
- Various trivial cleanups in accel/tcg/,
Guard few TCG calls with tcg_enabled()
- Explicit disassemble_info endianness
- Improve dual-endianness support for MicroBlaze
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Merge tag 'accel-cpus-20250306' of https://github.com/philmd/qemu into staging
Generic CPUs / accelerators patch queue
- Merge "qemu/clang-tsa.h" within "qemu/compiler.h"
- Various cleanups around accelerators initialization code
(better user/system split)
- Various trivial cleanups in accel/tcg/,
Guard few TCG calls with tcg_enabled()
- Explicit disassemble_info endianness
- Improve dual-endianness support for MicroBlaze
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* tag 'accel-cpus-20250306' of https://github.com/philmd/qemu: (54 commits)
include: Poison TARGET_PHYS_ADDR_SPACE_BITS definition
system: Open-code qemu_init_arch_modules() using target_name()
target/i386: Mark WHPX APIC region as little-endian
target/alpha: Do not mix exception flags and FPCR bits
target/riscv: Convert misa_mxl_max using GLib macros
target/riscv: Declare RISCVCPUClass::misa_mxl_max as RISCVMXL
target/xtensa: Finalize config in xtensa_register_core()
target/sparc: Constify SPARCCPUClass::cpu_def
target/i386: Constify X86CPUModel uses
disas: Remove target_words_bigendian() call in initialize_debug_target()
target/xtensa: Set disassemble_info::endian value in disas_set_info()
target/sh4: Set disassemble_info::endian value in disas_set_info()
target/riscv: Set disassemble_info::endian value in disas_set_info()
target/ppc: Set disassemble_info::endian value in disas_set_info()
target/mips: Set disassemble_info::endian value in disas_set_info()
target/microblaze: Set disassemble_info::endian value in disas_set_info
target/arm: Set disassemble_info::endian value in disas_set_info()
target: Set disassemble_info::endian value for big-endian targets
target: Set disassemble_info::endian value for little-endian targets
target/mips: Fix possible MSA int overflow
...
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This device is only used by the x86 targets, which are only
built as little-endian. Therefore the DEVICE_NATIVE_ENDIAN
definition expand to DEVICE_LITTLE_ENDIAN (besides, the
DEVICE_BIG_ENDIAN case isn't tested). Simplify directly
using DEVICE_LITTLE_ENDIAN.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250212113938.38692-6-philmd@linaro.org>
get_float_exception_flags() returns exception flags,
which are distinct from the FPCR bits used as error code.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250211162604.83446-1-philmd@linaro.org>
Use GLib conversion macros to pass misa_mxl_max as
riscv_cpu_class_init() class data.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250210133134.90879-6-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250210133134.90879-5-philmd@linaro.org>
Make XtensaConfigList::config not const. Only modify
XtensaConfig within xtensa_register_core(), when the
class is registered, not when it is initialized.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Message-Id: <20250210133134.90879-4-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250210133134.90879-3-philmd@linaro.org>
