Commit Graph

1898 Commits (master)

Author SHA1 Message Date
Richard Henderson dfc7228be3 target/i386: Use translator_ldub for everything
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-05-15 08:55:19 +02:00
Richard Henderson 962a145cdc accel/tcg: Provide default implementation of disas_log
Almost all of the disas_log implementations are identical.
Unify them within translator_loop.

Drop extra Priv/Virt logging from target/riscv.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-05-15 08:55:18 +02:00
Paolo Bonzini 1b1badf3c5 i386: select correct components for no-board build
The local APIC is a part of the CPU and has callbacks that are invoked
from multiple accelerators.

The IOAPIC on the other hand is optional, but ioapic_eoi_broadcast is
used by common x86 code to implement the IOAPIC's implicit EOI mode.
Add a stub in case the IOAPIC device is not included but the APIC is.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Message-ID: <20240509170044.190795-13-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-10 15:45:15 +02:00
Paolo Bonzini fe01af5d47 target/i386: fix feature dependency for WAITPKG
The VMX feature bit depends on general availability of WAITPKG,
not the other way round.

Fixes: 33cc88261c ("target/i386: add support for VMX_SECONDARY_EXEC_ENABLE_USER_WAIT_PAUSE", 2023-08-28)
Cc: qemu-stable@nongnu.org
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-10 15:45:14 +02:00
Paolo Bonzini 3fabbe0b7d target/i386: move prefetch and multi-byte UD/NOP to new decoder
These are trivial to add, and moving them to the new decoder fixes some
corner cases: raising #UD instead of an instruction fetch page fault for
the undefined opcodes, and incorrectly rejecting 0F 18 prefetches with
register operands (which are treated as reserved NOPs).

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-10 15:45:14 +02:00
Paolo Bonzini 40a3ec7b5f target/i386: rdpkru/wrpkru are no-prefix instructions
Reject 0x66/0xf3/0xf2 in front of them.

Cc: qemu-stable@nongnu.org
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-10 15:45:14 +02:00
Paolo Bonzini 41c685dc59 target/i386: fix operand size for DATA16 REX.W POPCNT
According to the manual, 32-bit vs 64-bit is governed by REX.W
and REX ignores the 0x66 prefix.  This can be confirmed with this
program:

    #include <stdio.h>
    int main()
    {
       int x = 0x12340000;
       int y;
       asm("popcntl %1, %0" : "=r" (y) : "r" (x)); printf("%x\n", y);
       asm("mov $-1, %0; .byte 0x66; popcntl %1, %0" : "+r" (y) : "r" (x)); printf("%x\n", y);
       asm("mov $-1, %0; .byte 0x66; popcntq %q1, %q0" : "+r" (y) : "r" (x)); printf("%x\n", y);
    }

which prints 5/ffff0000/5 on real hardware and 5/ffff0000/ffff0000
on QEMU.

Cc: qemu-stable@nongnu.org
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-10 15:45:14 +02:00
Paolo Bonzini 9f07e47a5e target/i386: remove PCOMMIT from TCG, deprecate property
The PCOMMIT instruction was never included in any physical processor.
TCG implements it as a no-op instruction, but its utility is debatable
to say the least.  Drop it from the decoder since it is only available
with "-cpu max", which does not guarantee migration compatibility
across versions, and deprecate the property just in case someone is
using it as "pcommit=off".

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-10 15:45:14 +02:00
Philippe Mathieu-Daudé 8b4d80bb53 misc: Use QEMU header path relative to include/ directory
QEMU headers are relative to the include/ directory,
not to the project root directory. Remove "include/".

See also:
https://www.qemu.org/docs/master/devel/style.html#include-directives

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240507142737.95735-1-philmd@linaro.org>
2024-05-09 00:07:21 +02:00
Paolo Bonzini d4e6d40c36 target/i386: remove duplicate prefix decoding
Now that a bulk of opcodes go through the new decoder, it is sensible
to do some cleanup.  Go immediately through disas_insn_new and only jump
back after parsing the prefixes.

disas_insn() now only contains the three sigsetjmp cases, and they
are more easily managed if they are inlined into i386_tr_translate_insn.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini ef309ec2a6 target/i386: split legacy decoder into a separate function
Split the bits that have some duplication with disas_insn_new, from
those that should be the main topic of the conversion.  This is the
first step towards removing duplicate decoding of prefixes between
disas_insn and disas_insn_new.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini 7795b455dd target/i386: decode x87 instructions in a separate function
These are unlikely to be converted to the table-based decoding
soon (perhaps there could be generic ESC decoding in decode-new.c.inc
for the Mod/RM byte, but not operand decoding), so keep them separate
from the remaining legacy-decoded instructions.

Acked-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini aef4f4affd target/i386: remove now-converted opcodes from old decoder
Send all converted opcodes to disas_insn_new() directly from the big
decoding switch statement; once more, the debugging/bisecting logic
disappears.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini 3519b813e1 target/i386: port extensions of one-byte opcodes to new decoder
A few two-byte opcodes are simple extensions of existing one-byte opcodes;
they are easy to decode and need no change to emit.c.inc.  Port them to
the new decoder.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini 37861fa519 target/i386: move BSWAP to new decoder
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini 2b8046f361 target/i386: move remaining conditional operations to new decoder
Move long-displacement Jcc, SETcc and CMOVcc to the new decoder.
While filling in the tables makes the code seem longer, the new
emitters are all just one line of code.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini 40c4b92f1c target/i386: merge and enlarge a few ranges for call to disas_insn_new
Since new opcodes are not going to be added in translate.c, round the
case labels that call to disas_insn_new(), including whole sets of
eight opcodes when possible.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini d7c41a60d0 target/i386: move C0-FF opcodes to new decoder (except for x87)
The shift instructions are rewritten instead of reusing code from the old
decoder.  Rotates use CC_OP_ADCOX more extensively and generally rely
more on the optimizer, so that the code generators are shared between
the immediate-count and variable-count cases.

In particular, this makes gen_RCL and gen_RCR pretty efficient for the
count == 1 case, which becomes (apart from a few extra movs) something like:

  (compute_cc_all if needed)
  // save old value for OF calculation
  mov     cc_src2, T0
  // the bulk of RCL is just this!
  deposit T0, cc_src, T0, 1, TARGET_LONG_BITS - 1
  // compute carry
  shr     cc_dst, cc_src2, length - 1
  and     cc_dst, cc_dst, 1
  // compute overflow
  xor     cc_src2, cc_src2, T0
  extract cc_src2, cc_src2, length - 1, 1

32-bit MUL and IMUL are also slightly more efficient on 64-bit hosts.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini b603136402 target/i386: generalize gen_movl_seg_T0
In the new decoder it is sometimes easier to put the segment
in T1 instead of T0, usually because another operand was loaded
by common code in T0.  Genrealize gen_movl_seg_T0 to allow
using any source.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini 5e9e21bcc4 target/i386: move 60-BF opcodes to new decoder
Compared to the old decoder, the main differences in translation
are for the little-used ARPL instruction.  IMUL is adjusted a bit
to share more code to produce flags, but is otherwise very similar.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:14 +02:00
Paolo Bonzini 2666fbd271 target/i386: allow instructions with more than one immediate
While keeping decode->immediate for convenience and for 4-operand instructions,
store the immediate in X86DecodedOp as well.  This enables instructions
with more than one immediate such as ENTER.  It can also be used for far
calls and jumps.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:52:19 +02:00
Paolo Bonzini 442e38c4fb target/i386: extract gen_far_call/jmp, reordering temporaries
Extract the code into new functions, and swap T0/T1 so that T0 corresponds
to the first immediate in the instruction stream.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:52:19 +02:00
Paolo Bonzini cc1d28bdbe target/i386: move 00-5F opcodes to new decoder
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:52:19 +02:00
Paolo Bonzini 445457693c target/i386: reintroduce debugging mechanism
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:52:12 +02:00
Paolo Bonzini 8b5de7ea56 target/i386: cleanup *gen_eob*
Create a new wrapper for syscall/sysret, and do not go through multiple
layers of wrappers.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:52:09 +02:00
Paolo Bonzini ccfabc00e0 target/i386: clarify the "reg" argument of functions returning CCPrepare
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:52:02 +02:00
Paolo Bonzini 89e4e65ac0 target/i386: do not use s->T0 and s->T1 as scratch registers for CCPrepare
Instead of using s->T0 or s->T1, create a scratch register
when computing the C, NC, L or LE conditions.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:51:59 +02:00
Paolo Bonzini bccb0c138e target/i386: extend cc_* when using them to compute flags
Instead of using s->tmp0 or s->tmp4 as the result, just extend the cc_*
registers in place.  It is harmless and, if multiple setcc instructions
are used, the optimizer will be able to remove the redundant ones.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:51:53 +02:00
Paolo Bonzini dd17322be7 target/i386: pull cc_op update to callers of gen_jmp_rel{,_csize}
gen_update_cc_op must be called before control flow splits.  Doing it
in gen_jmp_rel{,_csize} may hide bugs, instead assert that cc_op is
clean---even if that means a few more calls to gen_update_cc_op().

With this new invariant, setting cc_op to CC_OP_DYNAMIC is unnecessary
since the caller should have done it.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:51:43 +02:00
Paolo Bonzini bbba9594e8 target/i386: cleanup cc_op changes for REP/REPZ/REPNZ
gen_update_cc_op must be called before control flow splits.  Do it
where the jump on ECX!=0 is translated.

On the other hand, remove the call before gen_jcc1, which takes care of
it already, and explain why REPZ/REPNZ need not use CC_OP_DYNAMIC---the
translation block ends before any control-flow-dependent cc_op could
be observed.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:51:31 +02:00
Paolo Bonzini 64ddadc6bb target/i386: cc_op is not dynamic in gen_jcc1
Resetting cc_op to CC_OP_DYNAMIC should be done at control flow junctions,
which is not the case here.  This translation block is ending and the
only effect of calling set_cc_op() would be a discard of s->cc_srcT.
This discard is useless (it's a temporary, not a global) and in fact
prevents gen_prepare_cc from returning s->cc_srcT.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:51:17 +02:00
Paolo Bonzini e995f3f944 target/i386: remove mask from CCPrepare
With the introduction of TSTEQ and TSTNE the .mask field is always -1,
so remove all the now-unnecessary code.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:50:39 +02:00
Paolo Bonzini 9309b53e83 target/i386: use TSTEQ/TSTNE to check flags
The new conditions obviously come in handy when testing individual bits
of EFLAGS, and they make it possible to remove the .mask field of
CCPrepare.

Lowering to shift+and is done by the optimizer if necessary.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:50:39 +02:00
Paolo Bonzini 15957eb9ef target/i386: use TSTEQ/TSTNE to test low bits
When testing the sign bit or equality to zero of a partial register, it
is useful to use a single TSTEQ or TSTNE operation.  It can also be used
to test the parity flag, using bit 0 of the population count.

Do not do this for target_ulong-sized values however; the optimizer would
produce a comparison against zero anyway, and it avoids shifts by 64
which are undefined behavior.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:50:39 +02:00
Babu Moger b776569a53 target/i386: Fix CPUID encoding of Fn8000001E_ECX
Observed the following failure while booting the SEV-SNP guest and the
guest fails to boot with the smp parameters:
"-smp 192,sockets=1,dies=12,cores=8,threads=2".

qemu-system-x86_64: sev_snp_launch_update: SNP_LAUNCH_UPDATE ret=-5 fw_error=22 'Invalid parameter'
qemu-system-x86_64: SEV-SNP: CPUID validation failed for function 0x8000001e, index: 0x0.
provided: eax:0x00000000, ebx: 0x00000100, ecx: 0x00000b00, edx: 0x00000000
expected: eax:0x00000000, ebx: 0x00000100, ecx: 0x00000300, edx: 0x00000000
qemu-system-x86_64: SEV-SNP: failed update CPUID page

Reason for the failure is due to overflowing of bits used for "Node per
processor" in CPUID Fn8000001E_ECX. This field's width is 3 bits wide and
can hold maximum value 0x7. With dies=12 (0xB), it overflows and spills
over into the reserved bits. In the case of SEV-SNP, this causes CPUID
enforcement failure and guest fails to boot.

The PPR documentation for CPUID_Fn8000001E_ECX [Node Identifiers]
=================================================================
Bits    Description
31:11   Reserved.

10:8    NodesPerProcessor: Node per processor. Read-only.
        ValidValues:
        Value   Description
        0h      1 node per processor.
        7h-1h   Reserved.

7:0     NodeId: Node ID. Read-only. Reset: Fixed,XXh.
=================================================================

As in the spec, the valid value for "node per processor" is 0 and rest
are reserved.

Looking back at the history of decoding of CPUID_Fn8000001E_ECX, noticed
that there were cases where "node per processor" can be more than 1. It
is valid only for pre-F17h (pre-EPYC) architectures. For EPYC or later
CPUs, the linux kernel does not use this information to build the L3
topology.

Also noted that the CPUID Function 0x8000001E_ECX is available only when
TOPOEXT feature is enabled. This feature is enabled only for EPYC(F17h)
or later processors. So, previous generation of processors do not not
enumerate 0x8000001E_ECX leaf.

There could be some corner cases where the older guests could enable the
TOPOEXT feature by running with -cpu host, in which case legacy guests
might notice the topology change. To address those cases introduced a
new CPU property "legacy-multi-node". It will be true for older machine
types to maintain compatibility. By default, it will be false, so new
decoding will be used going forward.

The documentation is taken from Preliminary Processor Programming
Reference (PPR) for AMD Family 19h Model 11h, Revision B1 Processors 55901
Rev 0.25 - Oct 6, 2022.

Cc: qemu-stable@nongnu.org
Fixes: 31ada106d8 ("Simplify CPUID_8000_001E for AMD")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=206537
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Babu Moger <babu.moger@amd.com>
Message-ID: <0ee4b0a8293188a53970a2b0e4f4ef713425055e.1714757834.git.babu.moger@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:50:38 +02:00
Richard Henderson 873f9ca385 Accelerator patches
- Extract page-protection definitions to page-protection.h
 - Rework in accel/tcg in preparation of extracting TCG fields from CPUState
 - More uses of get_task_state() in user emulation
 - Xen refactors in preparation for adding multiple map caches (Juergen & Edgar)
 - MAINTAINERS updates (Aleksandar and Bin)
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Merge tag 'accel-20240506' of https://github.com/philmd/qemu into staging

Accelerator patches

- Extract page-protection definitions to page-protection.h
- Rework in accel/tcg in preparation of extracting TCG fields from CPUState
- More uses of get_task_state() in user emulation
- Xen refactors in preparation for adding multiple map caches (Juergen & Edgar)
- MAINTAINERS updates (Aleksandar and Bin)

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* tag 'accel-20240506' of https://github.com/philmd/qemu: (28 commits)
  MAINTAINERS: Update my email address
  MAINTAINERS: Update Aleksandar Rikalo email
  system: Pass RAM MemoryRegion and is_write in xen_map_cache()
  xen: mapcache: Break out xen_map_cache_init_single()
  xen: mapcache: Break out xen_invalidate_map_cache_single()
  xen: mapcache: Refactor xen_invalidate_map_cache_entry_unlocked
  xen: mapcache: Refactor xen_replace_cache_entry_unlocked
  xen: mapcache: Break out xen_ram_addr_from_mapcache_single
  xen: mapcache: Refactor xen_remap_bucket for multi-instance
  xen: mapcache: Refactor xen_map_cache for multi-instance
  xen: mapcache: Refactor lock functions for multi-instance
  xen: let xen_ram_addr_from_mapcache() return -1 in case of not found entry
  system: let qemu_map_ram_ptr() use qemu_ram_ptr_length()
  user: Use get_task_state() helper
  user: Declare get_task_state() once in 'accel/tcg/vcpu-state.h'
  user: Forward declare TaskState type definition
  accel/tcg: Move @plugin_mem_cbs from CPUState to CPUNegativeOffsetState
  accel/tcg: Restrict cpu_plugin_mem_cbs_enabled() to TCG
  accel/tcg: Restrict qemu_plugin_vcpu_exit_hook() to TCG plugins
  accel/tcg: Update CPUNegativeOffsetState::can_do_io field documentation
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-05-06 10:19:10 -07:00
Richard Henderson d4c453f648 * target/i386: Introduce SapphireRapids-v3 to add missing features
* switch boards to "default y"
 * allow building emulators without any board
 * configs: list "implied" device groups in the default configs
 * remove unnecessary declarations from typedefs.h
 * target/i386: Give IRQs a chance when resetting HF_INHIBIT_IRQ_MASK
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Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* target/i386: Introduce SapphireRapids-v3 to add missing features
* switch boards to "default y"
* allow building emulators without any board
* configs: list "implied" device groups in the default configs
* remove unnecessary declarations from typedefs.h
* target/i386: Give IRQs a chance when resetting HF_INHIBIT_IRQ_MASK

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# gpg:                using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg:                issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>" [full]

* tag 'for-upstream' of https://gitlab.com/bonzini/qemu: (46 commits)
  qga/commands-posix: fix typo in qmp_guest_set_user_password
  migration: do not include coroutine_int.h
  kvm: move target-dependent interrupt routing out of kvm-all.c
  pci: remove some types from typedefs.h
  tcg: remove CPU* types from typedefs.h
  display: remove GraphicHwOps from typedefs.h
  qapi/machine: remove types from typedefs.h
  monitor: remove MonitorDef from typedefs.h
  migration: remove PostcopyDiscardState from typedefs.h
  lockable: remove QemuLockable from typedefs.h
  intc: remove PICCommonState from typedefs.h
  qemu-option: remove QemuOpt from typedefs.h
  net: remove AnnounceTimer from typedefs.h
  numa: remove types from typedefs.h
  qdev-core: remove DeviceListener from typedefs.h
  fw_cfg: remove useless declarations from typedefs.h
  build: do not build virtio-vga-gl if virgl/opengl not available
  bitmap: Use g_try_new0/g_new0/g_renew
  target/i386: Introduce SapphireRapids-v3 to add missing features
  docs: document new convention for Kconfig board symbols
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-05-06 08:34:34 -07:00
Philippe Mathieu-Daudé b254c342cf accel/tcg: Access tcg_cflags with getter / setter
Access the CPUState::tcg_cflags via tcg_cflags_has() and
tcg_cflags_set() helpers.

Mechanical change using the following Coccinelle spatch script:

  @@
  expression cpu;
  expression flags;
  @@
  -     cpu->tcg_cflags & flags
  +     tcg_cflags_has(cpu, flags)

  @@
  expression cpu;
  expression flags;
  @@
  -     (tcg_cflags_has(cpu, flags))
  +     tcg_cflags_has(cpu, flags)

  @@
  expression cpu;
  expression flags;
  @@
  -     cpu->tcg_cflags |= flags;
  +     tcg_cflags_set(cpu, flags);

Then manually moving the declarations, and adding both
tcg_cflags_has() and tcg_cflags_set() definitions.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240427155714.53669-15-philmd@linaro.org>
2024-05-06 11:21:05 +02:00
Philippe Mathieu-Daudé 74781c0888 exec/cpu: Extract page-protection definitions to page-protection.h
Extract page-protection definitions from "exec/cpu-all.h"
to "exec/page-protection.h".

The list of files requiring the new header was generated
using:

$ git grep -wE \
  'PAGE_(READ|WRITE|EXEC|RWX|VALID|ANON|RESERVED|TARGET_.|PASSTHROUGH)'

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Acked-by: Nicholas Piggin <npiggin@gmail.com>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240427155714.53669-3-philmd@linaro.org>
2024-05-06 11:17:15 +02:00
Richard Henderson 97c872276d - Fix NULL dereference in NVMM & WHPX init_vcpu()
- Move user emulation headers "exec/user" to "user"
 - Fix SH-4 ADDV / SUBV opcodes
 - Drop Cocoa compatility on macOS <= 10.12
 - Update Anthony PERARD email
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Merge tag 'accel-sh4-ui-20240503' of https://github.com/philmd/qemu into staging

- Fix NULL dereference in NVMM & WHPX init_vcpu()
- Move user emulation headers "exec/user" to "user"
- Fix SH-4 ADDV / SUBV opcodes
- Drop Cocoa compatility on macOS <= 10.12
- Update Anthony PERARD email

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* tag 'accel-sh4-ui-20240503' of https://github.com/philmd/qemu:
  ui/cocoa.m: Drop old macOS-10.12-and-earlier compat ifdefs
  target/sh4: Rename TCGv variables as manual for SUBV opcode
  target/sh4: Rename TCGv variables as manual for ADDV opcode
  target/sh4: Fix SUBV opcode
  target/sh4: Fix ADDV opcode
  MAINTAINERS: Update my email address
  plugins: Update stale comment
  plugins/api: Only include 'exec/ram_addr.h' with system emulation
  coverity: Update user emulation regexp
  user: Move 'thunk.h' from 'exec/user' to 'user'
  user: Move 'abitypes.h' from 'exec/user' to 'user'
  exec: Include missing license in 'exec/cpu-common.h'
  accel/whpx: Fix NULL dereference in whpx_init_vcpu()
  accel/nvmm: Fix NULL dereference in nvmm_init_vcpu()

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-05-03 14:42:50 -07:00
Lei Wang b10b248173 target/i386: Introduce SapphireRapids-v3 to add missing features
Add the missing features(ss, tsc-adjust, cldemote, movdiri, movdir64b) in
the SapphireRapids-v3 CPU model.

Signed-off-by: Lei Wang <lei4.wang@intel.com>
Message-ID: <20240424072912.43188-1-lei4.wang@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-03 15:47:48 +02:00
Paolo Bonzini 4921d0a753 i386: switch boards to "default y"
Some targets use "default y" for boards to filter out those that require
TCG.  For consistency we are switching all other targets to do the same.
Continue with i386.

No changes to generated config-devices.mak files, other than
adding CONFIG_I386 to the x86_64-softmmu target.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-03 15:47:47 +02:00
Philippe Mathieu-Daudé 083367dbbf accel/whpx: Fix NULL dereference in whpx_init_vcpu()
When mechanically moving the @dirty field to AccelCPUState
in commit 9ad49538c7, we neglected cpu->accel is still NULL
when we want to dereference it.

Fixes: 9ad49538c7 ("accel/whpx: Use accel-specific per-vcpu @dirty field")
Reported-by: Volker Rümelin <vr_qemu@t-online.de>
Suggested-by: Volker Rümelin <vr_qemu@t-online.de>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240429091918.27429-2-philmd@linaro.org>
2024-05-03 14:37:51 +02:00
Philippe Mathieu-Daudé 61653b4a97 accel/nvmm: Fix NULL dereference in nvmm_init_vcpu()
When mechanically moving the @dirty field to AccelCPUState
in commit 79f1926b2d, we neglected cpu->accel is still NULL
when we want to dereference it.

Reported-by: Volker Rümelin <vr_qemu@t-online.de>
Suggested-by: Volker Rümelin <vr_qemu@t-online.de>
Fixes: 79f1926b2d ("accel/nvmm: Use accel-specific per-vcpu @dirty field")
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240429091918.27429-3-philmd@linaro.org>
2024-05-03 14:37:51 +02:00
Paolo Bonzini 5ce77fcb1b Kconfig: kvm: allow building without any board
KVM code might have to call functions on the PCIDevice that is
passed to kvm_arch_fixup_msi_route().  This fails in the case
where --without-default-devices is used and no board is
configured.  While this is not really a useful configuration,
and therefore setting up stubs for CONFIG_PCI is overkill,
failing the build is impolite.  Just include the PCI
subsystem if kvm_arch_fixup_msi_route() requires it, as
is the case for ARM and x86.

Reported-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Fabiano Rosas <farosas@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-03 14:16:26 +02:00
Ruihan Li 6a5a63f74b target/i386: Give IRQs a chance when resetting HF_INHIBIT_IRQ_MASK
When emulated with QEMU, interrupts will never come in the following
loop. However, if the NOP instruction is uncommented, interrupts will
fire as normal.

	loop:
		cli
    		call do_sti
		jmp loop

	do_sti:
		sti
		# nop
		ret

This behavior is different from that of a real processor. For example,
if KVM is enabled, interrupts will always fire regardless of whether the
NOP instruction is commented or not. Also, the Intel Software Developer
Manual states that after the STI instruction is executed, the interrupt
inhibit should end as soon as the next instruction (e.g., the RET
instruction if the NOP instruction is commented) is executed.

This problem is caused because the previous code may choose not to end
the TB even if the HF_INHIBIT_IRQ_MASK has just been reset (e.g., in the
case where the STI instruction is immediately followed by the RET
instruction), so that IRQs may not have a change to trigger. This commit
fixes the problem by always terminating the current TB to give IRQs a
chance to trigger when HF_INHIBIT_IRQ_MASK is reset.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Ruihan Li <lrh2000@pku.edu.cn>
Message-ID: <20240415064518.4951-4-lrh2000@pku.edu.cn>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-03 14:15:48 +02:00
Thomas Huth 4984321436 target/i386/cpu: Remove "x86" prefix from the CPU list
Printing an "x86" in front of each CPU name is not helpful at all:
It is confusing for the users since they don't know whether they
have to specify these letters for the "-cpu" parameter, too, and
it also takes some precious space in the dense output of the CPU
entries. Let's simply remove this now and use two spaces at the
beginning of the lines for the indentation of the entries instead,
like most other target architectures are doing it for their CPU help
output already.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2024-04-29 09:37:26 +03:00
Philippe Mathieu-Daudé e620363687 accel/hvf: Use accel-specific per-vcpu @dirty field
HVF has a specific use of the CPUState::vcpu_dirty field
(CPUState::vcpu_dirty is not used by common code).
To make this field accel-specific, add and use a new
@dirty variable in the AccelCPUState structure.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240424174506.326-4-philmd@linaro.org>
2024-04-26 17:03:00 +02:00
Philippe Mathieu-Daudé 79f1926b2d accel/nvmm: Use accel-specific per-vcpu @dirty field
NVMM has a specific use of the CPUState::vcpu_dirty field
(CPUState::vcpu_dirty is not used by common code).
To make this field accel-specific, add and use a new
@dirty variable in the AccelCPUState structure.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240424174506.326-3-philmd@linaro.org>
2024-04-26 17:02:56 +02:00
Philippe Mathieu-Daudé 9ad49538c7 accel/whpx: Use accel-specific per-vcpu @dirty field
WHPX has a specific use of the CPUState::vcpu_dirty field
(CPUState::vcpu_dirty is not used by common code).
To make this field accel-specific, add and use a new
@dirty variable in the AccelCPUState structure.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240424174506.326-2-philmd@linaro.org>
2024-04-26 17:02:24 +02:00