Commit Graph

67 Commits

Author SHA1 Message Date
Philippe Mathieu-Daudé
0610677293 target/mips: Optimize regnames[] arrays
Since all entries are no more than 3/4/6 bytes (including nul
terminator), can save space and pie runtime relocations by
declaring regnames[] as array of 3/4/6 const char.

Inspired-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210617174323.2900831-10-f4bug@amsat.org>
2021-06-24 16:48:08 +02:00
Richard Henderson
119065574d hw/core: Constify TCGCPUOps
We no longer have any runtime modifications to this struct,
so declare them all const.

Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20210227232519.222663-3-richard.henderson@linaro.org>
2021-05-26 15:33:59 -07:00
Philippe Mathieu-Daudé
08928c6d0d cpu: Move CPUClass::get_phys_page_debug to SysemuCPUOps
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210517105140.1062037-21-f4bug@amsat.org>
[rth: Drop declaration movement from target/*/cpu.h]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-26 15:33:59 -07:00
Philippe Mathieu-Daudé
feece4d070 cpu: Move CPUClass::vmsd to SysemuCPUOps
Migration is specific to system emulation.

- Move the CPUClass::vmsd field to SysemuCPUOps,
- restrict VMSTATE_CPU() macro to sysemu,
- vmstate_dummy is now unused, remove it.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210517105140.1062037-16-f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-26 15:33:59 -07:00
Philippe Mathieu-Daudé
8b80bd28a5 cpu: Introduce SysemuCPUOps structure
Introduce a structure to hold handler specific to sysemu.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210517105140.1062037-15-f4bug@amsat.org>
[rth: Squash "restrict hw/core/sysemu-cpu-ops.h" patch]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-26 15:33:59 -07:00
Philippe Mathieu-Daudé
744c72a837 cpu: Rename CPUClass vmsd -> legacy_vmsd
Quoting Peter Maydell [*]:

  There are two ways to handle migration for
  a CPU object:

  (1) like any other device, so it has a dc->vmsd that covers
  migration for the whole object. As usual for objects that are a
  subclass of a parent that has state, the first entry in the
  VMStateDescription field list is VMSTATE_CPU(), which migrates
  the cpu_common fields, followed by whatever the CPU's own migration
  fields are.

  (2) a backwards-compatible mechanism for CPUs that were
  originally migrated using manual "write fields to the migration
  stream structures". The on-the-wire migration format
  for those is based on the 'env' pointer (which isn't a QOM object),
  and the cpu_common part of the migration data is elsewhere.

  cpu_exec_realizefn() handles both possibilities:

  * for type 1, dc->vmsd is set and cc->vmsd is not,
    so cpu_exec_realizefn() does nothing, and the standard
    "register dc->vmsd for a device" code does everything needed

  * for type 2, dc->vmsd is NULL and so we register the
    vmstate_cpu_common directly to handle the cpu-common fields,
    and the cc->vmsd to handle the per-CPU stuff

  You can't change a CPU from one type to the other without breaking
  migration compatibility, which is why some guest architectures
  are stuck on the cc->vmsd form. New targets should use dc->vmsd.

To avoid new targets to start using type (2), rename cc->vmsd as
cc->legacy_vmsd. The correct field to implement is dc->vmsd (the
DeviceClass one).

See also commit b170fce3dd ("cpu: Register VMStateDescription
through CPUState") for historic background.

[*] https://www.mail-archive.com/qemu-devel@nongnu.org/msg800849.html

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Cc: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20210517105140.1062037-13-f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-26 15:33:59 -07:00
Philippe Mathieu-Daudé
5679479b9a target/mips: Move CP0 helpers to sysemu/cp0.c
Opcodes accessing Coprocessor 0 are privileged.
Move the CP0 helpers to sysemu/ and simplify the #ifdef'ry.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210428170410.479308-28-f4bug@amsat.org>
2021-05-02 16:49:35 +02:00
Philippe Mathieu-Daudé
8aa52bdc87 target/mips: Move exception management code to exception.c
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210428170410.479308-27-f4bug@amsat.org>
2021-05-02 16:49:35 +02:00
Philippe Mathieu-Daudé
d60146a938 target/mips: Move Special opcodes to tcg/sysemu/special_helper.c
Move the Special opcodes helpers to tcg/sysemu/special_helper.c.

Since mips_io_recompile_replay_branch() is set as
CPUClass::io_recompile_replay_branch handler in cpu.c,
we need to declare its prototype in "tcg-internal.h".

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210428170410.479308-24-f4bug@amsat.org>
2021-05-02 16:49:35 +02:00
Philippe Mathieu-Daudé
c284201702 target/mips: Restrict mmu_init() to TCG
mmu_init() is only required by TCG accelerator.
Restrict its declaration and call to TCG.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210428170410.479308-21-f4bug@amsat.org>
2021-05-02 16:49:35 +02:00
Philippe Mathieu-Daudé
533fc64feb target/mips: Declare mips_env_set_pc() inlined in "internal.h"
Rename set_pc() as mips_env_set_pc(), declare it inlined
and use it in cpu.c and op_helper.c.

Reported-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210428170410.479308-9-f4bug@amsat.org>
2021-05-02 16:49:34 +02:00
Philippe Mathieu-Daudé
4d169b9cce target/mips: Turn printfpr() macro into a proper function
Turn printfpr() macro into a proper function: fpu_dump_fpr().

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210428170410.479308-8-f4bug@amsat.org>
2021-05-02 16:49:34 +02:00
Philippe Mathieu-Daudé
4f14ce4bf4 target/mips: Restrict mips_cpu_dump_state() to cpu.c
As mips_cpu_dump_state() is only used once to initialize the
CPUClass::dump_state handler, we can move it to cpu.c to keep
it symbol local.
Beside, this handler is used by all accelerators, while the
translate.c file targets TCG.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210428170410.479308-7-f4bug@amsat.org>
2021-05-02 16:49:34 +02:00
Philippe Mathieu-Daudé
830b87ea25 target/mips: Optimize CPU/FPU regnames[] arrays
Since all entries are no more than 4 bytes (including nul
terminator), can save space and pie runtime relocations by
declaring regnames[] as array of 4 const char.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210428170410.479308-6-f4bug@amsat.org>
2021-05-02 16:49:34 +02:00
Philippe Mathieu-Daudé
adbf1be325 target/mips: Make CPU/FPU regnames[] arrays global
The CPU/FPU regnames[] arrays is used in mips_tcg_init() and
mips_cpu_dump_state(), which while being in translate.c is
not specific to TCG.

To be able to move mips_cpu_dump_state() to cpu.c, which is
compiled for all accelerator, we need to make the regnames[]
arrays global to target/mips/ by declaring them in "internal.h".

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210428170410.479308-5-f4bug@amsat.org>
2021-05-02 16:49:34 +02:00
Peter Maydell
f4abdf3271 Testing, guest-loader and other misc tweaks
- add warning text to quickstart example
   - add CFI tests to CI
   - use --arch-only for docker pre-requisites
   - fix .editorconfig for emacs
   - add guest-loader for Xen-like hypervisor testing
   - move generic-loader docs into manual proper
   - move semihosting out of hw/
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Merge remote-tracking branch 'remotes/stsquad/tags/pull-testing-docs-xen-updates-100321-2' into staging

Testing, guest-loader and other misc tweaks

  - add warning text to quickstart example
  - add CFI tests to CI
  - use --arch-only for docker pre-requisites
  - fix .editorconfig for emacs
  - add guest-loader for Xen-like hypervisor testing
  - move generic-loader docs into manual proper
  - move semihosting out of hw/

# gpg: Signature made Wed 10 Mar 2021 15:35:31 GMT
# gpg:                using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [full]
# Primary key fingerprint: 6685 AE99 E751 67BC AFC8  DF35 FBD0 DB09 5A9E 2A44

* remotes/stsquad/tags/pull-testing-docs-xen-updates-100321-2:
  semihosting: Move hw/semihosting/ -> semihosting/
  semihosting: Move include/hw/semihosting/ -> include/semihosting/
  tests/avocado: add boot_xen tests
  docs: add some documentation for the guest-loader
  docs: move generic-loader documentation into the main manual
  hw/core: implement a guest-loader to support static hypervisor guests
  device_tree: add qemu_fdt_setprop_string_array helper
  hw/riscv: migrate fdt field to generic MachineState
  hw/board: promote fdt from ARM VirtMachineState to MachineState
  .editorconfig: update the automatic mode setting for Emacs
  tests/docker: Use --arch-only when building Debian cross image
  gitlab-ci.yml: Add jobs to test CFI flags
  gitlab-ci.yml: Allow custom # of parallel linkers
  tests/docker: add a test-tcg for building then running check-tcg
  docs/system: add a gentle prompt for the complexity to come

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-03-11 16:20:58 +00:00
Philippe Mathieu-Daudé
6b5fe13786 semihosting: Move include/hw/semihosting/ -> include/semihosting/
We want to move the semihosting code out of hw/ in the next patch.

This patch contains the mechanical steps, created using:

  $ git mv include/hw/semihosting/ include/
  $ sed -i s,hw/semihosting,semihosting, $(git grep -l hw/semihosting)

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210226131356.3964782-2-f4bug@amsat.org>
Message-Id: <20210305135451.15427-2-alex.bennee@linaro.org>
2021-03-10 15:34:12 +00:00
Peter Maydell
5ee0abed51 clock: Add ClockEvent parameter to callbacks
The Clock framework allows users to specify a callback which is
called after the clock's period has been updated.  Some users need to
also have a callback which is called before the clock period is
updated.

As the first step in adding support for notifying Clock users on
pre-update events, add an argument to the ClockCallback to specify
what event is being notified, and add an argument to the various
functions for registering a callback to specify which events are
of interest to that callback.

Note that the documentation update renders correct the previously
incorrect claim in 'Adding a new clock' that callbacks "will be
explained in a following section".

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Luc Michel <luc@lmichel.fr>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210219144617.4782-2-peter.maydell@linaro.org
2021-03-08 17:20:01 +00:00
Richard Henderson
95ab7c2291 target/mips: Create mips_io_recompile_replay_branch
Move the code from accel/tcg/translate-all.c to target/mips/cpu.c.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210208233906.479571-4-richard.henderson@linaro.org>
Message-Id: <20210213130325.14781-13-alex.bennee@linaro.org>
2021-02-18 08:19:15 +00:00
Claudio Fontana
7827168471 cpu: tcg_ops: move to tcg-cpu-ops.h, keep a pointer in CPUClass
we cannot in principle make the TCG Operations field definitions
conditional on CONFIG_TCG in code that is included by both common_ss
and specific_ss modules.

Therefore, what we can do safely to restrict the TCG fields to TCG-only
builds, is to move all tcg cpu operations into a separate header file,
which is only included by TCG, target-specific code.

This leaves just a NULL pointer in the cpu.h for the non-TCG builds.

This also tidies up the code in all targets a bit, having all TCG cpu
operations neatly contained by a dedicated data struct.

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Message-Id: <20210204163931.7358-16-cfontana@suse.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-02-05 10:24:15 -10:00
Claudio Fontana
8535dd702d cpu: move do_unaligned_access to tcg_ops
make it consistently SOFTMMU-only.

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

[claudio: make the field presence in cpu.h unconditional, removing the ifdefs]
Message-Id: <20210204163931.7358-12-cfontana@suse.de>

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-02-05 10:24:14 -10:00
Claudio Fontana
cbc183d2d9 cpu: move cc->transaction_failed to tcg_ops
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

[claudio: wrap target code around CONFIG_TCG and !CONFIG_USER_ONLY]

avoiding its use in headers used by common_ss code (should be poisoned).

Note: need to be careful with the use of CONFIG_USER_ONLY,
Message-Id: <20210204163931.7358-11-cfontana@suse.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-02-05 10:24:14 -10:00
Claudio Fontana
0545608056 cpu: move cc->do_interrupt to tcg_ops
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210204163931.7358-10-cfontana@suse.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-02-05 10:24:14 -10:00
Eduardo Habkost
e124536f37 cpu: Move tlb_fill to tcg_ops
[claudio: wrapped target code in CONFIG_TCG]

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210204163931.7358-7-cfontana@suse.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-02-05 10:24:14 -10:00
Eduardo Habkost
48c1a3e303 cpu: Move cpu_exec_* to tcg_ops
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
[claudio: wrapped target code in CONFIG_TCG]
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210204163931.7358-6-cfontana@suse.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-02-05 10:24:14 -10:00
Eduardo Habkost
ec62595bab cpu: Move synchronize_from_tb() to tcg_ops
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
[claudio: wrapped target code in CONFIG_TCG, reworded comments]
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210204163931.7358-5-cfontana@suse.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-02-05 10:24:14 -10:00
Eduardo Habkost
e9e51b7154 cpu: Introduce TCGCpuOperations struct
The TCG-specific CPU methods will be moved to a separate struct,
to make it easier to move accel-specific code outside generic CPU
code in the future.  Start by moving tcg_initialize().

The new CPUClass.tcg_opts field may eventually become a pointer,
but keep it an embedded struct for now, to make code conversion
easier.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
[claudio: move TCGCpuOperations inside include/hw/core/cpu.h]
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210204163931.7358-2-cfontana@suse.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-02-05 10:24:14 -10:00
Philippe Mathieu-Daudé
03e4d95c91 target/mips: Move msa_reset() to msa_helper.c
translate_init.c.inc mostly contains CPU definitions.
msa_reset() doesn't belong here, move it with the MSA
helpers.

One comment style is updated to avoid checkpatch.pl warning.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20201215225757.764263-15-f4bug@amsat.org>
Tested-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
2021-01-14 17:13:53 +01:00
Philippe Mathieu-Daudé
72f31f60f8 target/mips: Simplify msa_reset()
Call msa_reset() unconditionally, but only reset
the MSA registers if MSA is implemented.

Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Message-Id: <20201208003702.4088927-3-f4bug@amsat.org>
2021-01-14 17:13:53 +01:00
Philippe Mathieu-Daudé
25a1362875 target/mips: Introduce ase_msa_available() helper
Instead of accessing CP0_Config3 directly and checking
the 'MSA Present' bit, introduce an explicit helper,
making the code easier to read.

Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Message-Id: <20201208003702.4088927-2-f4bug@amsat.org>
2021-01-14 17:13:53 +01:00
Philippe Mathieu-Daudé
0dc351ca6b target/mips: Rename translate_init.c as cpu-defs.c
This file is not TCG specific, contains CPU definitions
and is consumed by cpu.c. Rename it as such.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20201214183739.500368-10-f4bug@amsat.org>
2021-01-14 17:13:53 +01:00
Philippe Mathieu-Daudé
e9927723ba target/mips: Move common helpers from helper.c to cpu.c
The rest of helper.c is TLB related. Extract the non TLB
specific functions to cpu.c, so we can rename helper.c as
tlb_helper.c in the next commit.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20201214183739.500368-6-f4bug@amsat.org>
2021-01-14 17:13:53 +01:00
Philippe Mathieu-Daudé
9bcd41d41f target/mips: Inline cpu_state_reset() in mips_cpu_reset()
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20201214183739.500368-2-f4bug@amsat.org>
2021-01-14 17:13:53 +01:00
Philippe Mathieu-Daudé
2e211e0a12 target/mips/mips-defs: Rename ISA_MIPS32R6 as ISA_MIPS_R6
The MIPS ISA release 6 is common to 32/64-bit CPUs.

To avoid holes in the insn_flags type, update the
definition with the next available bit.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210104221154.3127610-16-f4bug@amsat.org>
2021-01-14 17:13:53 +01:00
Richard Henderson
04a37d4ca4 tcg: Make tb arg to synchronize_from_tb const
There is nothing within the translators that ought to be
changing the TranslationBlock data, so make it const.

This does not actually use the read-only copy of the
data structure that exists within the rx region.

Reviewed-by: Joelle van Dyne <j@getutm.app>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-01-07 05:09:41 -10:00
Peter Maydell
0ac1fb2567 target/mips: Don't use clock_get_ns() in clock period calculation
Currently the MIPS code uses the old clock_get_ns() API to
calculate a time length in nanoseconds:
 cpu->cp0_count_rate * clock_get_ns(MIPS_CPU(cpu)->clock)

This relies on the clock having a period which is an exact number
of nanoseconds.

Switch to the new clock_ticks_to_ns() function, which does the
multiplication internally at a higher precision.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Luc Michel <luc@lmichel.fr>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20201215150929.30311-3-peter.maydell@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2021-01-04 23:24:44 +01:00
Eric Blake
54aa3de72e qapi: Use QAPI_LIST_PREPEND() where possible
Anywhere we create a list of just one item or by prepending items
(typically because order doesn't matter), we can use
QAPI_LIST_PREPEND().  But places where we must keep the list in order
by appending remain open-coded until later patches.

Note that as a side effect, this also performs a cleanup of two minor
issues in qga/commands-posix.c: the old code was performing
 new = g_malloc0(sizeof(*ret));
which 1) is confusing because you have to verify whether 'new' and
'ret' are variables with the same type, and 2) would conflict with C++
compilation (not an actual problem for this file, but makes
copy-and-paste harder).

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20201113011340.463563-5-eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
[Straightforward conflicts due to commit a8aa94b5f8 "qga: update
schema for guest-get-disks 'dependents' field" and commit a10b453a52
"target/mips: Move mips_cpu_add_definition() from helper.c to cpu.c"
resolved.  Commit message tweaked.]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2020-12-19 10:20:14 +01:00
Philippe Mathieu-Daudé
7b884bf51e target/mips: Inline cpu_mips_realize_env() in mips_cpu_realizefn()
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20201206233949.3783184-17-f4bug@amsat.org>
2020-12-13 20:27:11 +01:00
Philippe Mathieu-Daudé
c20cf02bbd target/mips: Move cpu definitions, reset() and realize() to cpu.c
Nothing TCG specific there, move to common cpu code.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20201206233949.3783184-16-f4bug@amsat.org>
2020-12-13 20:27:11 +01:00
Philippe Mathieu-Daudé
a10b453a52 target/mips: Move mips_cpu_add_definition() from helper.c to cpu.c
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20201206233949.3783184-10-f4bug@amsat.org>
2020-12-13 20:26:02 +01:00
Philippe Mathieu-Daudé
ffa657ee70 target/mips: Extract cpu_supports*/cpu_set* translate.c
Move cpu_supports*() and cpu_set_exception_base() from
translate.c to cpu.c.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20201206233949.3783184-9-f4bug@amsat.org>
2020-12-13 20:26:02 +01:00
Philippe Mathieu-Daudé
17c2c320f3 target/mips: Introduce ase_mt_available() helper
Instead of accessing CP0_Config3 directly and checking
the 'Multi-Threading Present' bit, introduce an helper
to simplify code review.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20201204222622.2743175-3-f4bug@amsat.org>
2020-12-13 20:26:02 +01:00
Philippe Mathieu-Daudé
df6adb68c1 target/mips: Introduce cpu_supports_isa() taking CPUMIPSState argument
Introduce cpu_supports_isa() which takes a CPUMIPSState
argument, more useful at runtime when the CPU is created
(no need to call the extensive object_class_by_name()).

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20201207215257.4004222-3-f4bug@amsat.org>
2020-12-13 19:58:54 +01:00
Philippe Mathieu-Daudé
8a6359f937 target/mips/cpu: Display warning when CPU is used without input clock
All our QOM users provides an input clock. In order to avoid
avoid future machines added without clock, display a warning.

User-mode emulation use the CP0 timer with the RDHWR instruction
(see commit cdfcad7883) so keep using the fixed 200 MHz clock
without diplaying any warning. Only display it in system-mode
emulation.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20201012095804.3335117-22-f4bug@amsat.org>
2020-10-17 13:59:40 +02:00
Philippe Mathieu-Daudé
7aaab96a9b target/mips/cpu: Introduce mips_cpu_create_with_clock() helper
Introduce an helper to create a MIPS CPU and connect it to
a reference clock. This helper is not MIPS specific, but so
far only MIPS CPUs need it.

Suggested-by: Huacai Chen <zltjiangshi@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20201012095804.3335117-13-f4bug@amsat.org>
2020-10-17 13:59:40 +02:00
Philippe Mathieu-Daudé
a0713e85bf target/mips/cpu: Allow the CPU to use dynamic frequencies
Use the Clock API and let the CPU object have an input clock.

If no clock is connected, keep using the default frequency of
200 MHz used since the introduction of the 'r4k' machine in
commit 6af0bf9c7c.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20201012095804.3335117-12-f4bug@amsat.org>
2020-10-17 13:59:40 +02:00
Philippe Mathieu-Daudé
d0bec217ee target/mips/cpu: Make cp0_count_rate a property
Since not all CPU implementations use a cores use a CP0 timer
at half the frequency of the CPU, make this variable a property.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20201012095804.3335117-11-f4bug@amsat.org>
2020-10-17 11:13:15 +02:00
Philippe Mathieu-Daudé
68b981aa76 target/mips/cpu: Calculate the CP0 timer period using the CPU frequency
The CP0 timer period is a function of the CPU frequency.
Start using the default values, which will be replaced by
properties in the next commits.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Message-Id: <20201012095804.3335117-10-f4bug@amsat.org>
2020-10-17 11:13:15 +02:00
Philippe Mathieu-Daudé
d225b51220 target/mips: Move cp0_count_ns to CPUMIPSState
Currently the CP0 timer period is fixed at 10 ns, corresponding
to a fixed CPU frequency of 200 MHz (using half the speed of the
CPU).

In few commits we will be able to use a different CPU frequency.
In preparation, move the cp0_count_ns variable to CPUMIPSState
so we can modify it.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Message-Id: <20201012095804.3335117-9-f4bug@amsat.org>
2020-10-17 11:13:15 +02:00
Peter Maydell
781c67ca55 cpu: Use DeviceClass reset instead of a special CPUClass reset
The CPUClass has a 'reset' method.  This is a legacy from when
TYPE_CPU used not to inherit from TYPE_DEVICE.  We don't need it any
more, as we can simply use the TYPE_DEVICE reset.  The 'cpu_reset()'
function is kept as the API which most places use to reset a CPU; it
is now a wrapper which calls device_cold_reset() and then the
tracepoint function.

This change should not cause CPU objects to be reset more often
than they are at the moment, because:
 * nobody is directly calling device_cold_reset() or
   qdev_reset_all() on CPU objects
 * no CPU object is on a qbus, so they will not be reset either
   by somebody calling qbus_reset_all()/bus_cold_reset(), or
   by the main "reset sysbus and everything in the qbus tree"
   reset that most devices are reset by

Note that this does not change the need for each machine or whatever
to use qemu_register_reset() to arrange to call cpu_reset() -- that
is necessary because CPU objects are not on any qbus, so they don't
get reset when the qbus tree rooted at the sysbus bus is reset, and
this isn't being changed here.

All the changes to the files under target/ were made using the
included Coccinelle script, except:

(1) the deletion of the now-inaccurate and not terribly useful
"CPUClass::reset" comments was done with a perl one-liner afterwards:
  perl -n -i -e '/ CPUClass::reset/ or print' target/*/*.c

(2) this bit of the s390 change was done by hand, because the
Coccinelle script is not sophisticated enough to handle the
parent_reset call being inside another function:

| @@ -96,8 +96,9 @@ static void s390_cpu_reset(CPUState *s, cpu_reset_type type)
|     S390CPU *cpu = S390_CPU(s);
|     S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
|     CPUS390XState *env = &cpu->env;
|+    DeviceState *dev = DEVICE(s);
|
|-    scc->parent_reset(s);
|+    scc->parent_reset(dev);
|     cpu->env.sigp_order = 0;
|     s390_cpu_set_state(S390_CPU_STATE_STOPPED, cpu);

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20200303100511.5498-1-peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2020-03-17 19:48:10 -04:00