36577 Commits

Author SHA1 Message Date
Alex Williamson
dcbfc5cefb vfio: Cleanup error_report()s
With the conversion to tracepoints, a couple previous DPRINTKs are
now quite a bit more visible and are really just informational.
Remove these and add a bit more description to another.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2014-12-22 10:37:27 -07:00
Eric Auger
e2c7d025ad hw/vfio: create common module
A new common module is created. It implements all functions
that have no device specificity (PCI, Platform).

This patch only consists in move (no functional changes)

Signed-off-by: Kim Phillips <kim.phillips@linaro.org>
Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2014-12-22 09:54:51 -07:00
Eric Auger
df92ee4448 hw/vfio/pci: use name field in format strings
Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2014-12-22 09:54:49 -07:00
Eric Auger
62356b7292 hw/vfio/pci: rename group_list into vfio_group_list
better fit in the rest of the namespace

Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2014-12-22 09:54:46 -07:00
Eric Auger
d13dd2d7a9 hw/vfio/pci: split vfio_get_device
vfio_get_device now takes a VFIODevice as argument. The function is split
into 2 parts: vfio_get_device which is generic and vfio_populate_device
which is bus specific.

3 new fields are introduced in VFIODevice to store dev_info.

vfio_put_base_device is created.

Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2014-12-22 09:54:38 -07:00
Eric Auger
a664477db8 hw/vfio/pci: Introduce VFIORegion
This structure is going to be shared by VFIOPCIDevice and
VFIOPlatformDevice. VFIOBAR includes it.

vfio_eoi becomes an ops of VFIODevice specialized by parent device.
This makes possible to transform vfio_bar_write/read into generic
vfio_region_write/read that will be used by VFIOPlatformDevice too.

vfio_mmap_bar becomes vfio_map_region

Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2014-12-22 09:54:37 -07:00
Eric Auger
b47d8efa9f hw/vfio/pci: handle reset at VFIODevice
Since we can potentially have both PCI and platform devices in
the same VFIO group, this latter now owns a list of VFIODevices.
A unified reset handler, vfio_reset_handler, is registered, looping
through this VFIODevice list. 2 specialized operations are introduced
(vfio_compute_needs_reset and vfio_hot_reset_multi): they allow to
implement type specific behavior. also reset_works and needs_reset
VFIOPCIDevice fields are moved into VFIODevice.

Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2014-12-22 09:54:35 -07:00
Eric Auger
462037c9e8 hw/vfio/pci: add type, name and group fields in VFIODevice
Add 3 new fields in the VFIODevice struct. Type is set to
VFIO_DEVICE_TYPE_PCI. The type enum value will later be used
to discriminate between VFIO PCI and platform devices. The name is
set to domain🚌slot:function. Currently used to test whether
the device already is attached to the group. Later on, the name
will be used to simplify all traces. The group is simply moved
from VFIOPCIDevice to VFIODevice.

Signed-off-by: Eric Auger <eric.auger@linaro.org>
[Fix g_strdup_printf() usage]
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2014-12-22 09:54:31 -07:00
Eric Auger
5546a621a8 hw/vfio/pci: introduce minimalist VFIODevice with fd
Introduce a new base VFIODevice strcut that will be used by both PCI
and Platform VFIO device. Move VFIOPCIDevice fd field there. Obviously
other fields from VFIOPCIDevice will be moved there but this patch
file is introduced to ease the review.

Also vfio_mask_single_irqindex, vfio_unmask_single_irqindex,
vfio_disable_irqindex now take a VFIODevice handle as argument.

Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2014-12-19 15:24:31 -07:00
Eric Auger
079eb19cbb hw/vfio/pci: generalize mask/unmask to any IRQ index
To prepare for platform device introduction, rename vfio_mask_intx
and vfio_unmask_intx into vfio_mask_single_irqindex and respectively
unmask_single_irqindex. Also use a nex index parameter.

With that name and prototype the function will be usable for other
indexes than VFIO_PCI_INTX_IRQ_INDEX.

Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2014-12-19 15:24:24 -07:00
Eric Auger
9ee27d7381 hw/vfio/pci: Rename VFIODevice into VFIOPCIDevice
This prepares for the introduction of VFIOPlatformDevice

Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2014-12-19 15:24:15 -07:00
Kim Phillips
cf7087db10 vfio: move hw/misc/vfio.c to hw/vfio/pci.c Move vfio.h into include/hw/vfio
This is done in preparation for the addition of VFIO platform
device support.

Signed-off-by: Kim Phillips <kim.phillips@linaro.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2014-12-19 15:24:06 -07:00
Frank Blaschka
c67676711c vfio: fix adding memory listener to the right address space
Depending on the device, container->space->as contains the valid AddressSpace.
Using address_space_memory breaks devices sitting behind an iommu (and using
a separate address space).

Signed-off-by: Frank Blaschka <blaschka@linux.vnet.ibm.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2014-12-19 14:40:06 -07:00
Eric Auger
385f57cf9a vfio: migration to trace points
This patch removes all DPRINTF and replace them by trace points.
A few DPRINTF used in error cases were transformed into error_report.

Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2014-12-19 14:40:06 -07:00
Peter Maydell
b574f60268 cirrus hwcursor fixes.
set secondary-vga category.
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Merge remote-tracking branch 'remotes/kraxel/tags/pull-vga-20141216-1' into staging

cirrus hwcursor fixes.
set secondary-vga category.

# gpg: Signature made Tue 16 Dec 2014 14:44:09 GMT using RSA key ID D3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"

* remotes/kraxel/tags/pull-vga-20141216-1:
  vga: set catagory bit for secondary vga device
  move hw cursor pos from cirrus to vga
  cirrus: Force use of shadow pixmap when HW cursor is enabled
  vga: Add mechanism to force the use of a shadow surface

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-12-17 19:22:42 +00:00
Peter Maydell
86b182ac0e Xtensa updates for 2.3:
- fix cross-page opcode handling;
 - move window overflow exception generation decision to translation phase;
 - don't generate dead code after privilege, window overflow or coprocessor
   exception;
 - add monitor command 'info opcount' for dumping TCG opcode counters.
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Merge remote-tracking branch 'remotes/xtensa/tags/20141217-xtensa' into staging

Xtensa updates for 2.3:

- fix cross-page opcode handling;
- move window overflow exception generation decision to translation phase;
- don't generate dead code after privilege, window overflow or coprocessor
  exception;
- add monitor command 'info opcount' for dumping TCG opcode counters.

# gpg: Signature made Wed 17 Dec 2014 02:57:01 GMT using RSA key ID F83FA044
# gpg: Good signature from "Max Filippov <max.filippov@cogentembedded.com>"
# gpg:                 aka "Max Filippov <jcmvbkbc@gmail.com>"

* remotes/xtensa/tags/20141217-xtensa:
  target-xtensa: don't generate dead code
  target-xtensa: record available window in TB flags
  target-xtensa: test cross-page opcode
  target-xtensa: fix translation for opcodes crossing page boundary
  tcg: add separate monitor command to dump opcode counters

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-12-17 17:31:26 +00:00
Peter Maydell
84afc4dd56 Merge remote-tracking branch 'remotes/lalrae/tags/mips-20141216' into staging
* remotes/lalrae/tags/mips-20141216: (30 commits)
  target-mips: remove excp_names[] from linux-user as it is unused
  disas/mips: disable unused mips16_to_32_reg_map[]
  disas/mips: remove unused mips_msa_control_names_numeric[32]
  target-mips: convert single case switch into if statement
  target-mips: Fix DisasContext's ulri member initialization
  target-mips: Use local float status pointer across MSA macros
  target-mips: Add missing calls to synchronise SoftFloat status
  linux-user: Use the 5KEf processor for 64-bit emulation
  target-mips: Also apply the CP0.Status mask to MTTC0
  target-mips: gdbstub: Clean up FPU register handling
  target-mips: Correct 32-bit address space wrapping
  target-mips: Tighten ISA level checks
  target-mips: Fix CP0.Config3.ISAOnExc write accesses
  target-mips: Output CP0.Config2-5 in the register dump
  target-mips: Fix the 64-bit case for microMIPS MOVE16 and MOVEP
  target-mips: Correct the writes to Status and Cause registers via gdbstub
  target-mips: Correct the handling of writes to CP0.Status for MIPSr6
  target-mips: Correct MIPS16/microMIPS branch size calculation
  target-mips: Restore the order of helpers
  target-mips: Remove unused `FLOAT_OP' macro
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-12-17 16:25:21 +00:00
Max Filippov
97e89ee914 target-xtensa: don't generate dead code
Don't generate TCG operations when privilege, register window or
coprocessor checks fail.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
2014-12-17 05:49:32 +03:00
Max Filippov
2db59a76c4 target-xtensa: record available window in TB flags
Record last valid 4-register window pane number in TB flags so that a
window overflow exception throw point is known at the translation time.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
2014-12-17 05:49:32 +03:00
Max Filippov
85d36377e4 target-xtensa: test cross-page opcode
Alter cross-page TB test to also test cross-page opcode.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-12-17 05:49:32 +03:00
Max Filippov
01673a3401 target-xtensa: fix translation for opcodes crossing page boundary
If TB ends with an opcode that crosses page boundary and the following
page is not executable then EPC1 for the code fetch exception wrongly
points at the beginning of the TB. Always treat instruction that crosses
page boundary as a separate TB.

Cc: qemu-stable@nongnu.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-12-17 05:49:32 +03:00
Max Filippov
246ae24d7d tcg: add separate monitor command to dump opcode counters
Currently 'info jit' outputs half of the information to monitor and the
rest to qemu log. Dumping opcode counts to monitor as a part of 'info
jit' command doesn't sound useful. Add new monitor command 'info
opcount' that only dumps opcode counters.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
2014-12-17 05:49:32 +03:00
Antony Pavlov
339aaf5b7f qemu-log: add log category for MMU info
Running barebox on qemu-system-mips* with '-d unimp' overloads
stderr by very very many mips_cpu_handle_mmu_fault() messages:

  mips_cpu_handle_mmu_fault address=b80003fd ret 0 physical 00000000180003fd prot 3
  mips_cpu_handle_mmu_fault address=a0800884 ret 0 physical 0000000000800884 prot 3
  mips_cpu_handle_mmu_fault pc a080cd80 ad b80003fd rw 0 mmu_idx 0

So it's very difficult to find LOG_UNIMP message.

The mips_cpu_handle_mmu_fault() messages appear on enabling ANY
logging! It's not very handy.

Adding separate log category for *_cpu_handle_mmu_fault()
logging fixes the problem.

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Acked-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 1418489298-1184-1-git-send-email-antonynpavlov@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-12-16 18:43:19 +00:00
Peter Maydell
d86fb03469 misc spice updates.
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Merge remote-tracking branch 'remotes/spice/tags/pull-spice-20141216-1' into staging

misc spice updates.

# gpg: Signature made Tue 16 Dec 2014 14:03:07 GMT using RSA key ID D3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"

* remotes/spice/tags/pull-spice-20141216-1:
  spice: fix memory leak
  spice: remove spice-experimental.h include
  spice: do not require TCP ports
  spice: rework mirror allocation, add no-resize fast path
  spice: reduce refresh rate in native mode
  spice: use bottom half instead of refresh timer for cursor updates

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-12-16 16:52:42 +00:00
Peter Maydell
4db753b1ac Migration pull for 2.3. Mostly moving the code to the migration/
directory, and updating MAINTAINERS.
 
 I've also folded my other MAINTAINERS update patches into this, as
 they're small by themselves.
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Merge remote-tracking branch 'remotes/amit-migration/tags/for-2.3-2' into staging

Migration pull for 2.3.  Mostly moving the code to the migration/
directory, and updating MAINTAINERS.

I've also folded my other MAINTAINERS update patches into this, as
they're small by themselves.

# gpg: Signature made Tue 16 Dec 2014 12:21:24 GMT using RSA key ID 854083B6
# gpg: Good signature from "Amit Shah <amit@amitshah.net>"
# gpg:                 aka "Amit Shah <amit@kernel.org>"
# gpg:                 aka "Amit Shah <amitshah@gmx.net>"

* remotes/amit-migration/tags/for-2.3-2:
  MAINTAINERS: Update for migrated migration code
  Split the QEMU buffered file code out
  Split struct QEMUFile out
  Remove migration- pre/post fixes off files in migration/ dir
  Start migrating migration code into a migration directory
  qmp-command.hx: add missing docs for migration capabilites
  cpu: verify that block->host is set
  cpu: assert host pointer offset within block
  exec: add wrapper for host pointer access
  MAINTAINERS: add include files to virtio-serial entry
  MAINTAINERS: add entry for virtio-rng
  MAINTAINERS: migration: add vmstate static checker files
  MAINTAINERS: Add myself to migration maintainers

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-12-16 14:53:23 +00:00
Gonglei
46817e86fc vga: set catagory bit for secondary vga device
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2014-12-16 15:14:42 +01:00
Gerd Hoffmann
22382bb96c move hw cursor pos from cirrus to vga 2014-12-16 15:14:42 +01:00
Benjamin Herrenschmidt
b9fd11b867 cirrus: Force use of shadow pixmap when HW cursor is enabled
The HW cursor cannot be painted on a shared surface. This fixes HW
cursor display in Windows NT 4.0 and Windows 98.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2014-12-16 15:14:42 +01:00
Benjamin Herrenschmidt
5508099397 vga: Add mechanism to force the use of a shadow surface
This prevents surface sharing which will be necessary to
fix cirrus HW cursor support.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2014-12-16 15:14:42 +01:00
Gonglei
a41642708a spice: fix memory leak
If errors happen for middle items of channel_list,
qmp_query_spice_channels() returns NULL, and the variable
cur_item going out of scope leaks the storage it points to.

The flag is a compatibility thing for older spice-server
versions. Meanwhile our minimum spice version requirement is
new enough that we should never ever see this error, and if we
do something went very seriously wrong. Let's using assert()
instead of returning NULL to avoid a memory leak.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2014-12-16 14:15:29 +01:00
Marc-André Lureau
e0883e2de0 spice: remove spice-experimental.h include
Nothing seems to be using functions from spice-experimental.h (better
that way). Let's remove its inclusion.

Signed-off-by: Marc-André Lureau <marcandre.lureau@gmail.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2014-12-16 14:15:29 +01:00
Marc-André Lureau
cf7856adef spice: do not require TCP ports
It is possible to use Spice server without TCP port.  On local VM,
qemu (and libvirt) can add new clients thanks to QMP add_client command.

Signed-off-by: Marc-André Lureau <marcandre.lureau@gmail.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2014-12-16 14:15:29 +01:00
Gerd Hoffmann
555e72f2d0 spice: rework mirror allocation, add no-resize fast path
Add fast path to qemu_spice_display_switch in case old and new
displaysurface have identical size (happens with display panning
and page flipping).  We just swap the backing store then and don't
go through the whole process of deleting and creating the primary
surface.

To simplify the code a bit move mirror surface allocation to
qemu_spice_display_switch().

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2014-12-16 14:15:29 +01:00
Gerd Hoffmann
3dcadce507 spice: reduce refresh rate in native mode
Now that cursor updates are out of the way qxl needs the refresh timer
only when when running in vga mode, for dirty bitmap checking.  In
native qxl mode the guest will notify us, so we don't need to poll and
can use the idle interval (one refresh wakeup every few seconds).

Cc: Marc-André Lureau <marcandre.lureau@gmail.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2014-12-16 14:15:29 +01:00
Gerd Hoffmann
0b2824e5e4 spice: use bottom half instead of refresh timer for cursor updates
Calling directly doesn't work due to the qxl-render code running in
spice server thread context.  Meanwhile bottom half scheduling is
thread-safe though, so we can use that to kick a cursor update in
main i/o thread context.

Cc: Marc-André Lureau <marcandre.lureau@gmail.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2014-12-16 14:15:29 +01:00
Leon Alrae
d4fa5354a2 target-mips: remove excp_names[] from linux-user as it is unused
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
2014-12-16 12:45:20 +00:00
Leon Alrae
8ef3915263 disas/mips: disable unused mips16_to_32_reg_map[]
This array is used by print_mips16_insn_arg() which is guarded by #if 0.
Therefore doing the same with the array as it generates clang warnings.

Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-12-16 12:45:20 +00:00
Leon Alrae
8e5f757044 disas/mips: remove unused mips_msa_control_names_numeric[32]
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
2014-12-16 12:45:20 +00:00
Leon Alrae
00fb4a1181 target-mips: convert single case switch into if statement
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
2014-12-16 12:45:20 +00:00
Maciej W. Rozycki
66991d1103 target-mips: Fix DisasContext's ulri member initialization
Set DisasContext's ulri member to 0 or 1 as with other bool members.

Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Reviewed-by: Leon Alrae <leon.alrae@imgtec.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-12-16 12:45:20 +00:00
Maciej W. Rozycki
1a4d570017 target-mips: Use local float status pointer across MSA macros
Reduce line wrapping throughout MSA helper macros by using a local float
status pointer rather than referring to the float status through the
environment each time.  No functional change.

Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Reviewed-by: Leon Alrae <leon.alrae@imgtec.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-12-16 12:45:20 +00:00
Maciej W. Rozycki
bb962386b8 target-mips: Add missing calls to synchronise SoftFloat status
Add missing calls to synchronise the SoftFloat status with the CP1.FSCR:

+ for the rounding and flush-to-zero modes upon processor reset,

+ for the flush-to-zero mode on FSCR updates through the GDB stub.

Refactor code accordingly and remove the redundant RESTORE_ROUNDING_MODE
macro.

Signed-off-by: Thomas Schwinge <thomas@codesourcery.com>
Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Reviewed-by: Leon Alrae <leon.alrae@imgtec.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-12-16 12:45:20 +00:00
Maciej W. Rozycki
74797f40dc linux-user: Use the 5KEf processor for 64-bit emulation
Replace the 20Kc original MIPS64 ISA processor used for 64-bit user
emulation with the 5KEf processor that implements the MIPS64r2 ISA,
complementing the choice of the 24Kf processor for 32-bit emulation.

Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Reviewed-by: Leon Alrae <leon.alrae@imgtec.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-12-16 12:45:20 +00:00
Maciej W. Rozycki
1d725ae952 target-mips: Also apply the CP0.Status mask to MTTC0
Make CP0.Status writes made with the MTTC0 instruction respect this
register's mask just like all the other places.  Also preserve the
current values of masked out bits.

Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Reviewed-by: Leon Alrae <leon.alrae@imgtec.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-12-16 12:45:20 +00:00
Maciej W. Rozycki
cbb26c9a12 target-mips: gdbstub: Clean up FPU register handling
Rewrite the FPU register access parts of `mips_cpu_gdb_read_register'
and `mips_cpu_gdb_write_register' for consistency between each other.

Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Reviewed-by: Leon Alrae <leon.alrae@imgtec.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-12-16 12:45:20 +00:00
Maciej W. Rozycki
c48245f0c6 target-mips: Correct 32-bit address space wrapping
Make sure the address space is unconditionally wrapped on 32-bit
processors, that is ones that do not implement at least the MIPS III
ISA.

Also make MIPS16 SAVE and RESTORE instructions use address calculation
rather than plain arithmetic operations for stack pointer manipulation
so that their semantics for stack accesses follows the architecture
specification.  That in particular applies to user software run on
64-bit processors with the CP0.Status.UX bit clear where the address
space is wrapped to 32 bits.

Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Reviewed-by: Leon Alrae <leon.alrae@imgtec.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-12-16 12:45:20 +00:00
Maciej W. Rozycki
d922445020 target-mips: Tighten ISA level checks
Tighten ISA level checks down to MIPS II that many of our instructions
are missing.  Also make sure any 64-bit instruction enables are only
applied to 64-bit processors, that is ones that implement at least the
MIPS III ISA.

Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Reviewed-by: Leon Alrae <leon.alrae@imgtec.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-12-16 12:45:20 +00:00
Maciej W. Rozycki
90f12d735d target-mips: Fix CP0.Config3.ISAOnExc write accesses
Fix CP0.Config3.ISAOnExc write accesses on microMIPS processors.  This
bit is mandatory for any processor that implements the microMIPS
instruction set.  This bit is r/w for processors that implement both the
standard MIPS and the microMIPS instruction set.  This bit is r/o and
hardwired to 1 if only the microMIPS instruction set is implemented.

There is no other bit ever writable in CP0.Config3 so defining a
corresponding `CP0_Config3_rw_bitmask' member in `CPUMIPSState' is I
think an overkill.  Therefore make the ability to write the bit rely on
the presence of ASE_MICROMIPS set in the instruction flags.

The read-only case of the microMIPS instruction set being implemented
only can be added when we add support for such a configuration.  We do
not currently have such support, we have no instruction flag that would
control the presence of the standard MIPS instruction set nor any
associated code in instruction decoding.

This change is needed to boot a microMIPS Linux kernel successfully,
otherwise it hangs early on as interrupts are enabled and then the
exception handler invoked loops as its first instruction is interpreted
in the wrong execution mode and triggers another exception right away.
And then over and over again.

We already check the current setting of the CP0.Config3.ISAOnExc in
`set_hflags_for_handler' to set the ISA bit correctly on the exception
handler entry so it is the ability to set it that is missing only.

Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Reviewed-by: Leon Alrae <leon.alrae@imgtec.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-12-16 12:45:20 +00:00
Maciej W. Rozycki
27e1fb13f2 target-mips: Output CP0.Config2-5 in the register dump
Include CP0.Config2 through CP0.Config5 registers in the register dump
produced with the `info registers' monitor command.  Align vertically
with the registers already output.

Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-12-16 12:45:20 +00:00
Maciej W. Rozycki
7215d7e7ae target-mips: Fix the 64-bit case for microMIPS MOVE16 and MOVEP
Fix microMIPS MOVE16 and MOVEP instructions on 64-bit processors by
using register addition operations.

This copies the approach taken with MIPS16 MOVE instructions (I8_MOV32R
and I8_MOVR32 opcodes) and follows the observation that OPC_ADDU expands
to tcg_gen_mov_tl whenever `rt' is 0 and `rs' is not, therefore copying
`rs' to `rd' verbatim.  This is not the case with OPC_ADDIU where a
sign-extension from bit #31 is made, unless in the uninteresting case of
`rs' being 0, losing the upper 32 bits of the value copied for any
proper 64-bit values.

This also serves as an optimization as one op is produced in generated
code rather than two (again, unless `rs' is 0, where it doesn't change
anything).

Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Reviewed-by: Leon Alrae <leon.alrae@imgtec.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-12-16 12:45:20 +00:00