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  1. Sep 07, 2023
    • Niklas Cassel's avatar
      hw/ide/ahci: fix broken SError handling · 9f894235
      Niklas Cassel authored 
      
When encountering an NCQ error, you should not write the NCQ tag to the
SError register. This is completely wrong.

The SError register has a clear definition, where each bit represents a
different error, see PxSERR definition in AHCI 1.3.1.

If we write a random value (like the NCQ tag) in SError, e.g. Linux will
read SError, and will trigger arbitrary error handling depending on the
NCQ tag that happened to be executing.

In case of success, ncq_cb() will call ncq_finish().
In case of error, ncq_cb() will call ncq_err() (which will clear
ncq_tfs->used), and then call ncq_finish(), thus using ncq_tfs->used is
sufficient to tell if finished should get set or not.

Signed-off-by: default avatarNiklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: default avatarPhilippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230609140844.202795-9-nks@flawful.org
Signed-off-by: default avatarJohn Snow <jsnow@redhat.com>
      9f894235
    • Niklas Cassel's avatar
      hw/ide/ahci: fix ahci_write_fis_sdb() · 7e85cb0d
      Niklas Cassel authored 
      
When there is an error, we need to raise a TFES error irq, see AHCI 1.3.1,
5.3.13.1 SDB:Entry.

If ERR_STAT is set, we jump to state ERR:FatalTaskfile, which will raise
a TFES IRQ unconditionally, regardless if the I bit is set in the FIS or
not.

Thus, we should never raise a normal IRQ after having sent an error IRQ.

It is valid to signal successfully completed commands as finished in the
same SDB FIS that generates the error IRQ. The important thing is that
commands that did not complete successfully (e.g. commands that were
aborted, do not get the finished bit set).

Before this commit, there was never a TFES IRQ raised on NCQ error.

Signed-off-by: default avatarNiklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: default avatarPhilippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230609140844.202795-8-nks@flawful.org
Signed-off-by: default avatarJohn Snow <jsnow@redhat.com>
      7e85cb0d
    • Niklas Cassel's avatar
      hw/ide/ahci: PxCI should not get cleared when ERR_STAT is set · 1a16ce64
      Niklas Cassel authored 
      
For NCQ, PxCI is cleared on command queued successfully.
For non-NCQ, PxCI is cleared on command completed successfully.
Successfully means ERR_STAT, BUSY and DRQ are all cleared.

A command that has ERR_STAT set, does not get to clear PxCI.
See AHCI 1.3.1, section 5.3.8, states RegFIS:Entry and RegFIS:ClearCI,
and 5.3.16.5 ERR:FatalTaskfile.

In the case of non-NCQ commands, not clearing PxCI is needed in order
for host software to be able to see which command slot that failed.

Signed-off-by: default avatarNiklas Cassel <niklas.cassel@wdc.com>
Message-id: 20230609140844.202795-7-nks@flawful.org
Signed-off-by: default avatarJohn Snow <jsnow@redhat.com>
      1a16ce64
    • Niklas Cassel's avatar
      hw/ide/ahci: PxSACT and PxCI is cleared when PxCMD.ST is cleared · d73b84d0
      Niklas Cassel authored 
      
According to AHCI 1.3.1 definition of PxSACT:
This field is cleared when PxCMD.ST is written from a '1' to a '0' by
software. This field is not cleared by a COMRESET or a software reset.

According to AHCI 1.3.1 definition of PxCI:
This field is also cleared when PxCMD.ST is written from a '1' to a '0'
by software.

Clearing PxCMD.ST is part of the error recovery procedure, see
AHCI 1.3.1, section "6.2 Error Recovery".

If we don't clear PxCI on error recovery, the previous command will
incorrectly still be marked as pending after error recovery.

Signed-off-by: default avatarNiklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: default avatarPhilippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230609140844.202795-6-nks@flawful.org
Signed-off-by: default avatarJohn Snow <jsnow@redhat.com>
      d73b84d0
    • Niklas Cassel's avatar
      hw/ide/ahci: simplify and document PxCI handling · e2a5d9b3
      Niklas Cassel authored 
      
The AHCI spec states that:
For NCQ, PxCI is cleared on command queued successfully.

For non-NCQ, PxCI is cleared on command completed successfully.
(A non-NCQ command that completes with error does not clear PxCI.)

The current QEMU implementation either clears PxCI in check_cmd(),
or in ahci_cmd_done().

check_cmd() will clear PxCI for a command if handle_cmd() returns 0.
handle_cmd() will return -1 if BUSY or DRQ is set.

The QEMU implementation for NCQ commands will currently not set BUSY
or DRQ, so they will always have PxCI cleared by handle_cmd().
ahci_cmd_done() will never even get called for NCQ commands.

Non-NCQ commands are executed by ide_bus_exec_cmd().
Non-NCQ commands in QEMU are implemented either in a sync or in an async
way.

For non-NCQ commands implemented in a sync way, the command handler will
return true, and when ide_bus_exec_cmd() sees that a command handler
returns true, it will call ide_cmd_done() (which will call
ahci_cmd_done()). For a command implemented in a sync way,
ahci_cmd_done() will do nothing (since busy_slot is not set). Instead,
after ide_bus_exec_cmd() has finished, check_cmd() will clear PxCI for
these commands.

For non-NCQ commands implemented in an async way (using either aiocb or
pio_aiocb), the command handler will return false, ide_bus_exec_cmd()
will not call ide_cmd_done(), instead it is expected that the async
callback function will call ide_cmd_done() once the async command is
done. handle_cmd() will set busy_slot, if and only if BUSY or DRQ is
set, and this is checked _after_ ide_bus_exec_cmd() has returned.
handle_cmd() will return -1, so check_cmd() will not clear PxCI.
When the async callback calls ide_cmd_done() (which will call
ahci_cmd_done()), it will see that busy_slot is set, and
ahci_cmd_done() will clear PxCI.

This seems racy, since busy_slot is set _after_ ide_bus_exec_cmd() has
returned. The callback might come before busy_slot gets set. And it is
quite confusing that ahci_cmd_done() will be called for all non-NCQ
commands when the command is done, but will only clear PxCI in certain
cases, even though it will always write a D2H FIS and raise an IRQ.

Even worse, in the case where ahci_cmd_done() does not clear PxCI, it
still raises an IRQ. Host software might thus read an old PxCI value,
since PxCI is cleared (by check_cmd()) after the IRQ has been raised.

Try to simplify this by always setting busy_slot for non-NCQ commands,
such that ahci_cmd_done() will always be responsible for clearing PxCI
for non-NCQ commands.

For NCQ commands, clear PxCI when we receive the D2H FIS, but before
raising the IRQ, see AHCI 1.3.1, section 5.3.8, states RegFIS:Entry and
RegFIS:ClearCI.

Signed-off-by: default avatarNiklas Cassel <niklas.cassel@wdc.com>
Message-id: 20230609140844.202795-5-nks@flawful.org
Signed-off-by: default avatarJohn Snow <jsnow@redhat.com>
      e2a5d9b3
    • Niklas Cassel's avatar
      hw/ide/ahci: write D2H FIS when processing NCQ command · 2967dc82
      Niklas Cassel authored 
      
The way that BUSY + PxCI is cleared for NCQ (FPDMA QUEUED) commands is
described in SATA 3.5a Gold:

11.15 FPDMA QUEUED command protocol
DFPDMAQ2: ClearInterfaceBsy
"Transmit Register Device to Host FIS with the BSY bit cleared to zero
and the DRQ bit cleared to zero and Interrupt bit cleared to zero to
mark interface ready for the next command."

PxCI is currently cleared by handle_cmd(), but we don't write the D2H
FIS to the FIS Receive Area that actually caused PxCI to be cleared.

Similar to how ahci_pio_transfer() calls ahci_write_fis_pio() with an
additional parameter to write a PIO Setup FIS without raising an IRQ,
add a parameter to ahci_write_fis_d2h() so that ahci_write_fis_d2h()
also can write the FIS to the FIS Receive Area without raising an IRQ.

Change process_ncq_command() to call ahci_write_fis_d2h() without
raising an IRQ (similar to ahci_pio_transfer()), such that the FIS
Receive Area is in sync with the PxTFD shadow register.

E.g. Linux reads status and error fields from the FIS Receive Area
directly, so it is wise to keep the FIS Receive Area and the PxTFD
shadow register in sync.

Signed-off-by: default avatarNiklas Cassel <niklas.cassel@wdc.com>
Message-id: 20230609140844.202795-4-nks@flawful.org
Signed-off-by: default avatarJohn Snow <jsnow@redhat.com>
      2967dc82
    • Niklas Cassel's avatar
      hw/ide/core: set ERR_STAT in unsupported command completion · c3461c62
      Niklas Cassel authored 
      
Currently, the first time sending an unsupported command
(e.g. READ LOG DMA EXT) will not have ERR_STAT set in the completion.
Sending the unsupported command again, will correctly have ERR_STAT set.

When ide_cmd_permitted() returns false, it calls ide_abort_command().
ide_abort_command() first calls ide_transfer_stop(), which will call
ide_transfer_halt() and ide_cmd_done(), after that ide_abort_command()
sets ERR_STAT in status.

ide_cmd_done() for AHCI will call ahci_write_fis_d2h() which writes the
current status in the FIS, and raises an IRQ. (The status here will not
have ERR_STAT set!).

Thus, we cannot call ide_transfer_stop() before setting ERR_STAT, as
ide_transfer_stop() will result in the FIS being written and an IRQ
being raised.

The reason why it works the second time, is that ERR_STAT will still
be set from the previous command, so when writing the FIS, the
completion will correctly have ERR_STAT set.

Set ERR_STAT before writing the FIS (calling cmd_done), so that we will
raise an error IRQ correctly when receiving an unsupported command.

Signed-off-by: default avatarNiklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: default avatarPhilippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230609140844.202795-3-nks@flawful.org
Signed-off-by: default avatarJohn Snow <jsnow@redhat.com>
      c3461c62
  3. Sep 06, 2023
    • Stefan Hajnoczi's avatar
      Merge tag 'ui-pull-request' of https://gitlab.com/marcandre.lureau/qemu into staging · c1523794
      Stefan Hajnoczi authored 
      UI patch queue

- misc fixes and improvement
- cleanups and refactoring in ui/vc code

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# gpg:                issuer "marcandre.lureau@redhat.com"
# gpg: Good signature from "Marc-André Lureau <marcandre.lureau@redhat.com>" [full]
# gpg:                 aka "Marc-André Lureau <marcandre.lureau@gmail.com>" [full]
# Primary key fingerprint: 87A9 BD93 3F87 C606 D276  F62D DAE8 E109 7596 9CE5

* tag 'ui-pull-request' of https://gitlab.com/marcandre.lureau/qemu

: (52 commits)
  ui/gtk: fix leaks found wtih fuzzing
  ui/vdagent: Unregister input handler of mouse during finalization
  ui/vdagent: call vdagent_disconnect() when agent connection is lost
  ui/dbus: implement damage regions for GL
  ui/dbus: Properly dispose touch/mouse dbus objects
  ui/vnc-enc-tight: Avoid dynamic stack allocation
  ui/vnc-enc-hextile: Use static rather than dynamic length stack array
  ui/spice-display: Avoid dynamic stack allocation
  ui/vc: change the argument for QemuTextConsole
  ui/vc: do not parse VC-specific options in Spice and GTK
  ui/vc: move text console invalidate in helper
  ui/console: minor stylistic changes
  ui/vc: skip text console resize when possible
  ui/console: fold text_console_update_cursor_timer
  ui/console: assert(surface) where appropriate
  ui/console: rename vga_ functions with qemu_console_
  ui/console: use QEMU_PIXMAN_COLOR helpers
  ui/console: declare console types in console.h
  ui/vc: use common text console surface creation
  ui/console: remove need for g_width/g_height
  ...

Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
      c1523794
    • Stefan Hajnoczi's avatar
      Merge tag 'pull-lu-20230901' of https://gitlab.com/rth7680/qemu into staging · bde438c3
      Stefan Hajnoczi authored 
      linux-user: Rewrite and improve /proc/pid/maps
linux-user: Fix shmdt and improve shm region tracking
linux-user: Remove ELF_START_MMAP and image_info.start_mmap

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# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* tag 'pull-lu-20230901' of https://gitlab.com/rth7680/qemu

:
  linux-user: Track shm regions with an interval tree
  linux-user: Fix shmdt
  linux-user: Use WITH_MMAP_LOCK_GUARD in target_{shmat,shmdt}
  linux-user: Move shmat and shmdt implementations to mmap.c
  linux-user: Remove ELF_START_MMAP and image_info.start_mmap
  linux-user: Emulate the Anonymous: keyword in /proc/self/smaps
  linux-user: Show heap address in /proc/pid/maps
  linux-user: Adjust brk for load_bias
  linux-user: Use walk_memory_regions for open_self_maps
  util/selfmap: Use dev_t and ino_t in MapInfo
  linux-user: Emulate /proc/cpuinfo for Alpha
  linux-user: Emulate /proc/cpuinfo on aarch64 and arm
  linux-user: Split out cpu/target_proc.h

Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
      bde438c3
    • Stefan Hajnoczi's avatar
      Merge tag 'pull-aspeed-20230901' of https://github.com/legoater/qemu into staging · 912a9efd
      Stefan Hajnoczi authored 
      aspeed queue:

* Fixes for the Aspeed I2C model
* New SDK image for avocado tests
* blockdev support for flash device definition
* SD refactoring preparing ground for eMMC support

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# gpg: WARNING: This key is not certified with a trusted signature!
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# Primary key fingerprint: A0F6 6548 F048 95EB FE6B  0B60 51A3 43C7 CFFB ECA1

* tag 'pull-aspeed-20230901' of https://github.com/legoater/qemu

: (26 commits)
  hw/sd: Introduce a "sd-card" SPI variant model
  hw/sd: Add sd_cmd_SET_BLOCK_COUNT() handler
  hw/sd: Add sd_cmd_SEND_TUNING_BLOCK() handler
  hw/sd: Add sd_cmd_SEND_RELATIVE_ADDR() handler
  hw/sd: Add sd_cmd_ALL_SEND_CID() handler
  hw/sd: Add sd_cmd_SEND_OP_CMD() handler
  hw/sd: Add sd_cmd_GO_IDLE_STATE() handler
  hw/sd: Add sd_cmd_unimplemented() handler
  hw/sd: Add sd_cmd_illegal() handler
  hw/sd: Introduce sd_cmd_handler type
  hw/sd: Move proto_name to SDProto structure
  hw/sd: When card is in wrong state, log which spec version is used
  hw/sd: When card is in wrong state, log which state it is
  hw/sd/sdcard: Return ILLEGAL for CMD19/CMD23 prior SD spec v3.01
  aspeed: Get the BlockBackend of FMC0 from the flash device
  m25p80: Introduce an helper to retrieve the BlockBackend of a device
  aspeed: Create flash devices only when defaults are enabled
  hw/ssi: Check for duplicate CS indexes
  aspeed/smc: Wire CS lines at reset
  hw/ssi: Introduce a ssi_get_cs() helper
  ...

Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
      912a9efd
  5. Sep 05, 2023
    • Stefan Hajnoczi's avatar
      Merge tag 'pull-request-2023-08-31' of https://gitlab.com/thuth/qemu into staging · 2d8fbcb1
      Stefan Hajnoczi authored 
      * Use precise selfmodifying code mode on s390x TCG
* Check for availablility of more devices in qtests before using them
* Some other minor qtest fixes

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# gpg: Signature made Thu 31 Aug 2023 15:16:14 EDT
# gpg:                using RSA key 27B88847EEE0250118F3EAB92ED9D774FE702DB5
# gpg:                issuer "thuth@redhat.com"
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full]
# gpg:                 aka "Thomas Huth <thuth@redhat.com>" [full]
# gpg:                 aka "Thomas Huth <huth@tuxfamily.org>" [full]
# gpg:                 aka "Thomas Huth <th.huth@posteo.de>" [unknown]
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3  EAB9 2ED9 D774 FE70 2DB5

* tag 'pull-request-2023-08-31' of https://gitlab.com/thuth/qemu

:
  meson: test for CONFIG_TCG in config_all
  subprojects/berkeley-testfloat-3: Update to fix a problem with compiler warnings
  tests/qtest/bios-tables-test: Check for virtio-iommu device before using it
  tests/qtest/netdev-socket: Avoid variable-length array in inet_get_free_port_multiple()
  tests/qtest/usb-hcd-xhci-test: Check availability of devices before using them
  tests/tcg/s390x: Test precise self-modifying code handling
  target/s390x: Define TARGET_HAS_PRECISE_SMC

Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
      2d8fbcb1
    • Stefan Hajnoczi's avatar
      Merge tag 'misc-20230831' of https://github.com/philmd/qemu into staging · a9c17e9a
      Stefan Hajnoczi authored 
      Misc patches queue

Build fixes:
- Only define OS_OBJECT_USE_OBJC with gcc

Overall cleanups:
- Do not declare function prototypes using 'extern' keyword
- Remove unmaintained HAX accelerator
- Have FEWatchFunc handlers return G_SOURCE_CONTINUE/REMOVE instead of boolean
- Avoid modifying QOM class internals from instance in pmbus_device
- Avoid variable-length array in xhci_get_port_bandwidth
- Remove unuseful kvmclock_create() stub
- Style: permit inline loop variables
- Various header cleanups
- Various spelling fixes

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# Primary key fingerprint: FAAB E75E 1291 7221 DCFD  6BB2 E3E3 2C2C DEAD C0DE

* tag 'misc-20230831' of https://github.com/philmd/qemu

: (39 commits)
  build: Only define OS_OBJECT_USE_OBJC with gcc
  tests/tcg/aarch64: Rename bti-crt.inc.c -> bti-crt.c.inc
  ui: spelling fixes
  util: spelling fixes
  util/fifo8: Fix typo in fifo8_push_all() description
  hw/i386: Rename 'hw/kvm/clock.h' -> 'hw/i386/kvm/clock.h'
  hw/i386: Remove unuseful kvmclock_create() stub
  hw/usb/hcd-xhci: Avoid variable-length array in xhci_get_port_bandwidth()
  hw/usb: spelling fixes
  hw/sd: spelling fixes
  hw/mips: spelling fixes
  hw/display: spelling fixes
  hw/ide: spelling fixes
  hw/i2c: spelling fixes
  hw/i2c/pmbus_device: Fix modifying QOM class internals from instance
  hw/char/pl011: Replace magic values by register field definitions
  hw/char/pl011: Remove duplicated PL011_INT_[RT]X definitions
  hw/char/pl011: Display register name in trace events
  hw/char/pl011: Restrict MemoryRegionOps implementation access sizes
  hw/char: Have FEWatchFunc handlers return G_SOURCE_CONTINUE/REMOVE
  ...

Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
      a9c17e9a
  7. Sep 04, 2023