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75360 Commits

Author SHA1 Message Date
Bin Meng acead54c78
riscv: virt: Allow PCI address 0 
When testing e1000 with the virt machine, e1000's I/O space cannot
be accessed. Debugging shows that the I/O BAR (BAR1) is correctly
written with address 0 plus I/O enable bit, but QEMU's "info pci"
shows that:

  Bus  0, device   1, function 0:
    Ethernet controller: PCI device 8086:100e
  ...
      BAR1: I/O at 0xffffffffffffffff [0x003e].
  ...

It turns out we should set pci_allow_0_address to true to allow 0
PCI address, otherwise pci_bar_address() treats such address as
PCI_BAR_UNMAPPED.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:46:35 -08:00
Alistair Francis c9eefe05a4
target/riscv: Allow enabling the Hypervisor extension 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:46:34 -08:00
Alistair Francis e44b50b5b2
target/riscv: Add the MSTATUS_MPV_ISSET helper macro 
Add a helper macro MSTATUS_MPV_ISSET() which will determine if the
MSTATUS_MPV bit is set for both 32-bit and 64-bit RISC-V.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:46:33 -08:00
Alistair Francis 551fa7e8a6
target/riscv: Add support for the 32-bit MSTATUSH CSR 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:46:32 -08:00
Alistair Francis 3067553993
target/riscv: Set htval and mtval2 on execptions 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:46:31 -08:00
Alistair Francis b2ef6ab9fe
target/riscv: Raise the new execptions when 2nd stage translation fails 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:46:30 -08:00
Alistair Francis 36a18664ba
target/riscv: Implement second stage MMU 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:46:29 -08:00
Alistair Francis 1448689c7b
target/riscv: Allow specifying MMU stage 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:46:28 -08:00
Alistair Francis ae84dd0ab7
target/riscv: Respect MPRV and SPRV for floating point ops 
mark_fs_dirty() is the only place in translate.c that uses the
virt_enabled bool. Let's respect the contents of MSTATUS.MPRV and
HSTATUS.SPRV when setting the bool as this is used for performing
floating point operations when V=0.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:46:27 -08:00
Alistair Francis 45b4dc8b40
target/riscv: Mark both sstatus and msstatus_hs as dirty 
Mark both sstatus and vsstatus as dirty (3).

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:46:26 -08:00
Alistair Francis 29409c1d92
target/riscv: Disable guest FP support based on virtual status 
When the Hypervisor extension is in use we only enable floating point
support when both status and vsstatus have enabled floating point
support.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:47 -08:00
Alistair Francis e28eaed879
target/riscv: Only set TB flags with FP status if enabled 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:46 -08:00
Alistair Francis 0736febb2d
target/riscv: Remove the hret instruction 
The hret instruction does not exist in the new spec versions, so remove
it from QEMU.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:45 -08:00
Alistair Francis 895c412cb6
target/riscv: Add hfence instructions 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:44 -08:00
Alistair Francis e3fba4bab6
target/riscv: Add Hypervisor trap return support 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:43 -08:00
Alistair Francis 5eb9e782f5
target/riscv: Add hypvervisor trap support 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:42 -08:00
Alistair Francis 9d0d112696
target/riscv: Generate illegal instruction on WFI when V=1 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:41 -08:00
Alistair Francis eccc5a12c2
target/ricsv: Flush the TLB on virtulisation mode changes 
To ensure our TLB isn't out-of-date we flush it on all virt mode
changes. Unlike priv mode this isn't saved in the mmu_idx as all
guests share V=1. The easiest option is just to flush on all changes.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:40 -08:00
Alistair Francis 3ef10a098b
target/riscv: Add support for virtual interrupt setting 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:39 -08:00
Alistair Francis a2e9f57d06
target/riscv: Extend the SIP CSR to support virtulisation 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:38 -08:00
Alistair Francis d0e53ce33e
target/riscv: Extend the MIE CSR to support virtulisation 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:37 -08:00
Alistair Francis 713d8363de
target/riscv: Set VS bits in mideleg for Hyp extension 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:36 -08:00
Alistair Francis 66e594f280
target/riscv: Add virtual register swapping function 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:35 -08:00
Alistair Francis 34cfb5f618
target/riscv: Add Hypervisor machine CSRs accesses 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:34 -08:00
Alistair Francis 8747c9eeb2
target/riscv: Add Hypervisor virtual CSRs accesses 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:33 -08:00
Alistair Francis ff2cc1294c
target/riscv: Add Hypervisor CSR access functions 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:32 -08:00
Alistair Francis df30e652d4
target/riscv: Dump Hypervisor registers if enabled 
Dump the Hypervisor registers and the current Hypervisor state.

While we are editing this code let's also dump stvec and scause.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:31 -08:00
Alistair Francis 35f690391b
target/riscv: Print priv and virt in disas log 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:31 -08:00
Alistair Francis 0a42f4c440
target/riscv: Fix CSR perm checking for HS mode 
Update the CSR permission checking to work correctly when we are in
HS-mode.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:30 -08:00
Alistair Francis c7b1bbc80f
target/riscv: Add the force HS exception mode 
Add a FORCE_HS_EXCEP mode to the RISC-V virtulisation status. This bit
specifies if an exeption should be taken to HS mode no matter the
current delegation status. This is used when an exeption must be taken
to HS mode, such as when handling interrupts.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:29 -08:00
Alistair Francis ef6bb7b626
target/riscv: Add the virtulisation mode 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:28 -08:00
Alistair Francis 205377f894
target/riscv: Rename the H irqs to VS irqs 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:27 -08:00
Alistair Francis ab67a1d07a
target/riscv: Add support for the new execption numbers 
The v0.5 Hypervisor spec add new execption numbers, let's add support
for those.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:26 -08:00
Alistair Francis bd023ce33b
target/riscv: Add the Hypervisor CSRs to CPUState 
Add the Hypervisor CSRs to CPUState and at the same time (to avoid
bisect issues) update the CSR macros for the v0.5 Hyp spec.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:25 -08:00
Alistair Francis af1fa0039c
target/riscv: Add the Hypervisor extension 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Chih-Min Chao <chihmin.chao@sifive.com>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:24 -08:00
Alistair Francis 028616130d
target/riscv: Convert MIP CSR to target_ulong 
The MIP CSR is a xlen CSR, it was only 32-bits to allow atomic access.
Now that we don't use atomics for MIP we can change this back to a xlen
CSR.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
 2020-02-27 13:45:23 -08:00
Peter Maydell 8b6b68e05b virtio, pc: fixes, features 
New virtio iommu.
 Unrealize memory leaks.
 In-band kick/call support.
 Bugfixes, documentation all over the place.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
 -----BEGIN PGP SIGNATURE-----
 
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 =ue55
 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

virtio, pc: fixes, features

New virtio iommu.
Unrealize memory leaks.
In-band kick/call support.
Bugfixes, documentation all over the place.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Thu 27 Feb 2020 08:46:33 GMT
# gpg:                using RSA key 5D09FD0871C8F85B94CA8A0D281F0DB8D28D5469
# gpg:                issuer "mst@redhat.com"
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [full]
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>" [full]
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17  0970 C350 3912 AFBE 8E67
#      Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA  8A0D 281F 0DB8 D28D 5469

* remotes/mst/tags/for_upstream: (30 commits)
  Fixed assert in vhost_user_set_mem_table_postcopy
  vhost-user: only set slave channel for first vq
  acpi: cpuhp: document CPHP_GET_CPU_ID_CMD command
  libvhost-user: implement in-band notifications
  docs: vhost-user: add in-band kick/call messages
  libvhost-user: handle NOFD flag in call/kick/err better
  libvhost-user-glib: use g_main_context_get_thread_default()
  libvhost-user-glib: fix VugDev main fd cleanup
  libvhost-user: implement VHOST_USER_PROTOCOL_F_REPLY_ACK
  MAINTAINERS: add virtio-iommu related files
  hw/arm/virt: Add the virtio-iommu device tree mappings
  virtio-iommu-pci: Add virtio iommu pci support
  virtio-iommu: Support migration
  virtio-iommu: Implement fault reporting
  virtio-iommu: Implement translate
  virtio-iommu: Implement map/unmap
  virtio-iommu: Implement attach/detach command
  virtio-iommu: Decode the command payload
  virtio-iommu: Add skeleton
  virtio: gracefully handle invalid region caches
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2020-02-27 19:15:15 +00:00
Peter Maydell a7cfd219d5 nbd patches for 2020-02-26 
- ensure multiple meta contexts work
 - allow leading / in export names
 - fix a failure path memory leak
 -----BEGIN PGP SIGNATURE-----
 
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 EGaZlSUFRJmq/ao6pzJsmgZBrX/iPw==
 =sv4e
 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'remotes/ericb/tags/pull-nbd-2020-02-26' into staging

nbd patches for 2020-02-26

- ensure multiple meta contexts work
- allow leading / in export names
- fix a failure path memory leak

# gpg: Signature made Thu 27 Feb 2020 01:53:03 GMT
# gpg:                using RSA key 71C2CC22B1C4602927D2F3AAA7A16B4A2527436A
# gpg: Good signature from "Eric Blake <eblake@redhat.com>" [full]
# gpg:                 aka "Eric Blake (Free Software Programmer) <ebb9@byu.net>" [full]
# gpg:                 aka "[jpeg image of size 6874]" [full]
# Primary key fingerprint: 71C2 CC22 B1C4 6029 27D2  F3AA A7A1 6B4A 2527 436A

* remotes/ericb/tags/pull-nbd-2020-02-26:
  block/nbd: fix memory leak in nbd_open()
  block/nbd: extract the common cleanup code
  nbd-client: Support leading / in NBD URI
  nbd: Fix regression with multiple meta contexts

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2020-02-27 18:16:03 +00:00
Peter Maydell 8b6269c8ec Testing and plugin updates: 
- fix pauth TCG tests
  - tweak away rcutorture failures
  - various Travis updates
  - relax iotest size check a little
  - fix for -trace/-D clash
  - fix cross compile detection for tcg tests
  - document plugin query lifetime
  - fix missing break in plugin core
  - fix some plugin warnings
  - better progressive instruction decode
  - avoid trampling vaddr in plugins
 -----BEGIN PGP SIGNATURE-----
 
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 Bn4ooyjiGeiJ9sKG5ra1HMbm2nJ+Xg==
 =ncn4
 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'remotes/stsquad/tags/pull-testing-and-plugins-250220-1' into staging

Testing and plugin updates:

 - fix pauth TCG tests
 - tweak away rcutorture failures
 - various Travis updates
 - relax iotest size check a little
 - fix for -trace/-D clash
 - fix cross compile detection for tcg tests
 - document plugin query lifetime
 - fix missing break in plugin core
 - fix some plugin warnings
 - better progressive instruction decode
 - avoid trampling vaddr in plugins

# gpg: Signature made Tue 25 Feb 2020 20:21:56 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-and-plugins-250220-1:
  tests/tcg: take into account expected clashes pauth-4
  tests/tcg: fix typo in configure.sh test for v8.3
  tcg: save vaddr temp for plugin usage
  tests/tcg: give debug builds a little bit longer
  tests/plugins: make howvec clean-up after itself.
  target/riscv: progressively load the instruction during decode
  qemu/bitops.h: Add extract8 and extract16
  tests/plugin: prevent uninitialized warning
  plugins/core: add missing break in cb_to_tcg_flags
  docs/devel: document query handle lifetimes
  tracing: only allow -trace to override -D if set
  tests/iotests: be a little more forgiving on the size test
  travis.yml: single-thread build-tcg stages
  travis.yml: Fix Travis YAML configuration warnings
  travis.yml: Test the s390-ccw build, too
  tests/rcutorture: mild documenting refactor of update thread
  tests/rcutorture: better document locking of stats
  tests/rcutorture: update usage hint
  tests/tcg: include a skip runner for pauth3 with plugins

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2020-02-27 17:12:31 +00:00
Igor Mammedov 2a7b18a320 softmmu/vl.c: fix too slow TCG regression 
Commit a1b18df9a4 moved -m option parsing after configure_accelerators()
that broke TCG accelerator initialization which accesses global ram_size
from size_code_gen_buffer() which is equal to 0 at that moment.

Partially revert a1b18df9a4, by returning set_memory_options() to its
original location and only keep 32-bit host VA check and 'memory-backend'
size check introduced by fe64d06afc at current place.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2020-02-27 17:11:20 +00:00
Raphael Norwitz b844a4c77b Fixed assert in vhost_user_set_mem_table_postcopy 
The current vhost_user_set_mem_table_postcopy() implementation
populates each region of the VHOST_USER_SET_MEM_TABLE message without
first checking if there are more than VHOST_MEMORY_MAX_NREGIONS already
populated. This can cause memory corruption if too many regions are
added to the message during the postcopy step.

This change moves an existing assert up such that attempting to
construct a VHOST_USER_SET_MEM_TABLE message with too many memory
regions will gracefully bring down qemu instead of corrupting memory.

Signed-off-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Signed-off-by: Peter Turschmid <peter.turschm@nutanix.com>
Message-Id: <1579143426-18305-2-git-send-email-raphael.norwitz@nutanix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
 2020-02-27 03:46:10 -05:00
Adrian Moreno 67b3965e89 vhost-user: only set slave channel for first vq 
When multiqueue is enabled, a vhost_dev is created for each queue
pair. However, only one slave channel is needed.

Fixes: 4bbeeba023 (vhost-user: add slave-req-fd support)
Cc: marcandre.lureau@redhat.com
Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
Message-Id: <20200121214553.28459-1-amorenoz@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
 2020-02-27 03:46:10 -05:00
Igor Mammedov fd9b0830b0 acpi: cpuhp: document CPHP_GET_CPU_ID_CMD command 
Commit 3a61c8db9d introduced CPHP_GET_CPU_ID_CMD command but
did not sufficiently describe it. Fix it by adding missing command
documentation.

Fixes: 3a61c8db9d ("acpi: cpuhp: add CPHP_GET_CPU_ID_CMD command")
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <1580306781-228371-1-git-send-email-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
 2020-02-27 03:46:10 -05:00
Johannes Berg ff1320050a libvhost-user: implement in-band notifications 
Add support for VHOST_USER_PROTOCOL_F_IN_BAND_NOTIFICATIONS, but
as it's not desired by default, don't enable it unless the device
implementation opts in by returning it from its protocol features
callback.

Note that I updated vu_set_vring_err_exec(), but didn't add any
sending of the VHOST_USER_SLAVE_VRING_ERR message as there's no
write to the err_fd today either.

This also adds vu_queue_notify_sync() which can be used to force
a synchronous notification if inband notifications are supported.
Previously, I had left out the slave->master direction handling
of F_REPLY_ACK, this now adds some code to support it as well.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Message-Id: <20200123081708.7817-7-johannes@sipsolutions.net>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
 2020-02-27 03:46:10 -05:00
Johannes Berg 3348e7e34f docs: vhost-user: add in-band kick/call messages 
For good reason, vhost-user is currently built asynchronously, that
way better performance can be obtained. However, for certain use
cases such as simulation, this is problematic.

Consider an event-based simulation in which both the device and CPU
have scheduled according to a simulation "calendar". Now, consider
the CPU sending I/O to the device, over a vring in the vhost-user
protocol. In this case, the CPU must wait for the vring interrupt
to have been processed by the device, so that the device is able to
put an entry onto the simulation calendar to obtain time to handle
the interrupt. Note that this doesn't mean the I/O is actually done
at this time, it just means that the handling of it is scheduled
before the CPU can continue running.

This cannot be done with the asynchronous eventfd based vring kick
and call design.

Extend the protocol slightly, so that a message can be used for kick
and call instead, if VHOST_USER_PROTOCOL_F_INBAND_NOTIFICATIONS is
negotiated. This in itself doesn't guarantee synchronisation, but both
sides can also negotiate VHOST_USER_PROTOCOL_F_REPLY_ACK and thus get
a reply to this message by setting the need_reply flag, and ensure
synchronisation this way.

To really use it in both directions, VHOST_USER_PROTOCOL_F_SLAVE_REQ
is also needed.

Since it is used for simulation purposes and too many messages on
the socket can lock up the virtual machine, document that this should
only be used together with the mentioned features.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Message-Id: <20200123081708.7817-6-johannes@sipsolutions.net>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
 2020-02-27 03:46:10 -05:00
Johannes Berg d5f99fc578 libvhost-user: handle NOFD flag in call/kick/err better 
The code here is odd, for example will it print out invalid
file descriptor numbers that were never sent in the message.

Clean that up a bit so it's actually possible to implement
a device that uses polling.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Message-Id: <20200123081708.7817-5-johannes@sipsolutions.net>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
 2020-02-27 03:46:10 -05:00
Johannes Berg a00fdc9c9d libvhost-user-glib: use g_main_context_get_thread_default() 
If we use NULL, we just get the main program default mainloop
here. Using g_main_context_get_thread_default() has basically
the same effect, but it lets us start different devices in
different threads with different mainloops, which can be useful.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Message-Id: <20200123081708.7817-4-johannes@sipsolutions.net>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
 2020-02-27 03:46:10 -05:00
Johannes Berg a7290a79fa libvhost-user-glib: fix VugDev main fd cleanup 
If you try to make a device implementation that can handle multiple
connections and allow disconnections (which requires overriding the
VHOST_USER_NONE handling), then glib will warn that we remove a src
while it's still on the mainloop, and will poll() an FD that doesn't
exist anymore.

Fix this by making vug_source_new() require pairing with the new
vug_source_destroy() so we can keep the GSource referenced in the
meantime.

Note that this requires calling the new API in vhost-user-input.
vhost-user-gpu also uses vug_source_new(), but never seems to free
the result at all, so I haven't changed anything there.

Fixes: 8bb7ddb78a ("libvhost-user: add glib source helper")
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Message-Id: <20200123081708.7817-3-johannes@sipsolutions.net>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
 2020-02-27 03:46:10 -05:00
Johannes Berg 8899d60142 libvhost-user: implement VHOST_USER_PROTOCOL_F_REPLY_ACK 
This is really simple, since we know whether a response is
already requested or not, so we can just send a (successful)
response when there isn't one already.

Given that, it's not all _that_ useful but the master can at
least be sure the message was processed, and we can exercise
more code paths using the example code.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Message-Id: <20200123081708.7817-2-johannes@sipsolutions.net>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
 2020-02-27 03:46:10 -05:00
Eric Auger c1dee91879 MAINTAINERS: add virtio-iommu related files 
Add a new "virtio-iommu" section with the new files
related to this device.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20200214132745.23392-11-eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
 2020-02-27 03:46:10 -05:00