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  1. Nov 07, 2023
    • Stefan Hajnoczi's avatar
      Merge tag 'pull-xenfv-stable-20231106' of git://git.infradead.org/users/dwmw2/qemu into staging · 54e97162
      Stefan Hajnoczi authored 
      Bugfixes for emulated Xen support

Selected bugfixes for mainline and stable, especially to the per-vCPU
local APIC vector delivery mode for event channel notifications, which
was broken in a number of ways.

The xen-block driver has been defaulting to the wrong protocol for x86
guest, and this fixes that — which is technically an incompatible change
but I'm fairly sure nobody relies on the broken behaviour (and in
production I *have* seen guests which rely on the correct behaviour,
which now matches the blkback driver in the Linux kernel).

A handful of other simple fixes for issues which came to light as new
features (qv) were being developed.

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# gpg: Signature made Mon 06 Nov 2023 18:25:02 HKT
# gpg:                using RSA key BE07D9FD54809AB2C4B0FF5F63762CDA67E2F359
# gpg:                issuer "dwmw2@infradead.org"
# gpg: Good signature from "David Woodhouse <dwmw2@infradead.org>" [unknown]
# gpg:                 aka "David Woodhouse <dwmw2@exim.org>" [unknown]
# gpg:                 aka "David Woodhouse <david@woodhou.se>" [unknown]
# gpg:                 aka "David Woodhouse <dwmw2@kernel.org>" [unknown]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: BE07 D9FD 5480 9AB2 C4B0  FF5F 6376 2CDA 67E2 F359

* tag 'pull-xenfv-stable-20231106' of git://git.infradead.org/users/dwmw2/qemu

:
  hw/xen: use correct default protocol for xen-block on x86
  hw/xen: take iothread mutex in xen_evtchn_reset_op()
  hw/xen: fix XenStore watch delivery to guest
  hw/xen: don't clear map_track[] in xen_gnttab_reset()
  hw/xen: select kernel mode for per-vCPU event channel upcall vector
  i386/xen: fix per-vCPU upcall vector for Xen emulation
  i386/xen: Don't advertise XENFEAT_supervisor_mode_kernel

Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
      54e97162
    • Stefan Hajnoczi's avatar
      Merge tag 'q800-for-8.2-pull-request' of https://github.com/vivier/qemu-m68k into staging · b8cdbe0e
      Stefan Hajnoczi authored 
      Q800 pull request 20231106

macfb: A/UX fixes for colour LUT

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# gpg: Signature made Mon 06 Nov 2023 16:15:16 HKT
# gpg:                using RSA key CD2F75DDC8E3A4DC2E4F5173F30C38BD3F2FBE3C
# gpg:                issuer "laurent@vivier.eu"
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full]
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>" [full]
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [full]
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* tag 'q800-for-8.2-pull-request' of https://github.com/vivier/qemu-m68k

:
  macfb: allow reads from the DAFB_LUT register
  macfb: allow larger write accesses to the DAFB_LUT register
  macfb: rename DAFB_RESET to DAFB_LUT_INDEX
  macfb: don't clear interrupts when writing to DAFB_RESET

Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
      b8cdbe0e
  3. Nov 06, 2023
    • David Woodhouse's avatar
      hw/xen: use correct default protocol for xen-block on x86 · a1c10829
      David Woodhouse authored 
      
Even on x86_64 the default protocol is the x86-32 one if the guest doesn't
specifically ask for x86-64.

Cc: qemu-stable@nongnu.org
Fixes: b6af8926 ("xen: add implementations of xen-block connect and disconnect functions...")
Signed-off-by: default avatarDavid Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: default avatarPaul Durrant <paul@xen.org>
      a1c10829
    • David Woodhouse's avatar
      hw/xen: take iothread mutex in xen_evtchn_reset_op() · debc995e
      David Woodhouse authored 
      
The xen_evtchn_soft_reset() function requires the iothread mutex, but is
also called for the EVTCHNOP_reset hypercall. Ensure the mutex is taken
in that case.

Cc: qemu-stable@nongnu.org
Fixes: a15b1097 ("hw/xen: Implement EVTCHNOP_reset")
Signed-off-by: default avatarDavid Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: default avatarPaul Durrant <paul@xen.org>
      debc995e
    • David Woodhouse's avatar
      hw/xen: fix XenStore watch delivery to guest · 4a5780f5
      David Woodhouse authored 
      
When fire_watch_cb() found the response buffer empty, it would call
deliver_watch() to generate the XS_WATCH_EVENT message in the response
buffer and send an event channel notification to the guest… without
actually *copying* the response buffer into the ring. So there was
nothing for the guest to see. The pending response didn't actually get
processed into the ring until the guest next triggered some activity
from its side.

Add the missing call to put_rsp().

It might have been slightly nicer to call xen_xenstore_event() here,
which would *almost* have worked. Except for the fact that it calls
xen_be_evtchn_pending() to check that it really does have an event
pending (and clear the eventfd for next time). And under Xen it's
defined that setting that fd to O_NONBLOCK isn't guaranteed to work,
so the emu implementation follows suit.

This fixes Xen device hot-unplug.

Cc: qemu-stable@nongnu.org
Fixes: 0254c4d1 ("hw/xen: Add xenstore wire implementation and implementation stubs")
Signed-off-by: default avatarDavid Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: default avatarPaul Durrant <paul@xen.org>
      4a5780f5
    • David Woodhouse's avatar
      hw/xen: don't clear map_track[] in xen_gnttab_reset() · 3de75ed3
      David Woodhouse authored 
      
The refcounts actually correspond to 'active_ref' structures stored in a
GHashTable per "user" on the backend side (mostly, per XenDevice).

If we zero map_track[] on reset, then when the backend drivers get torn
down and release their mapping we hit the assert(s->map_track[ref] != 0)
in gnt_unref().

So leave them in place. Each backend driver will disconnect and reconnect
as the guest comes back up again and reconnects, and it all works out OK
in the end as the old refs get dropped.

Cc: qemu-stable@nongnu.org
Fixes: de26b261 ("hw/xen: Implement soft reset for emulated gnttab")
Signed-off-by: default avatarDavid Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: default avatarPaul Durrant <paul@xen.org>
      3de75ed3
    • David Woodhouse's avatar
      hw/xen: select kernel mode for per-vCPU event channel upcall vector · 18e83f28
      David Woodhouse authored 
      
A guest which has configured the per-vCPU upcall vector may set the
HVM_PARAM_CALLBACK_IRQ param to fairly much anything other than zero.

For example, Linux v6.0+ after commit b1c3497e604 ("x86/xen: Add support
for HVMOP_set_evtchn_upcall_vector") will just do this after setting the
vector:

       /* Trick toolstack to think we are enlightened. */
       if (!cpu)
               rc = xen_set_callback_via(1);

That's explicitly setting the delivery to GSI#1, but it's supposed to be
overridden by the per-vCPU vector setting. This mostly works in Qemu
*except* for the logic to enable the in-kernel handling of event channels,
which falsely determines that the kernel cannot accelerate GSI delivery
in this case.

Add a kvm_xen_has_vcpu_callback_vector() to report whether vCPU#0 has
the vector set, and use that in xen_evtchn_set_callback_param() to
enable the kernel acceleration features even when the param *appears*
to be set to target a GSI.

Preserve the Xen behaviour that when HVM_PARAM_CALLBACK_IRQ is set to
*zero* the event channel delivery is disabled completely. (Which is
what that bizarre guest behaviour is working round in the first place.)

Cc: qemu-stable@nongnu.org
Fixes: 91cce756 ("hw/xen: Add xen_evtchn device for event channel emulation")
Signed-off-by: default avatarDavid Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: default avatarPaul Durrant <paul@xen.org>
      18e83f28
    • David Woodhouse's avatar
      i386/xen: fix per-vCPU upcall vector for Xen emulation · e7dbb62f
      David Woodhouse authored 
      
The per-vCPU upcall vector support had three problems. Firstly it was
using the wrong hypercall argument and would always return -EFAULT when
the guest tried to set it up. Secondly it was using the wrong ioctl() to
pass the vector to the kernel and thus the *kernel* would always return
-EINVAL. Finally, even when delivering the event directly from userspace
with an MSI, it put the destination CPU ID into the wrong bits of the
MSI address.

Linux doesn't (yet) use this mode so it went without decent testing
for a while.

Cc: qemu-stable@nongnu.org
Fixes: 105b47fd ("i386/xen: implement HVMOP_set_evtchn_upcall_vector")
Signed-off-by: default avatarDavid Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: default avatarPaul Durrant <paul@xen.org>
      e7dbb62f
    • David Woodhouse's avatar
      i386/xen: Don't advertise XENFEAT_supervisor_mode_kernel · e969f992
      David Woodhouse authored 
      
This confuses lscpu into thinking it's running in PVH mode.

Cc: qemu-stable@nongnu.org
Fixes: bedcc139 ("i386/xen: implement HYPERVISOR_xen_version")
Signed-off-by: default avatarDavid Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: default avatarPaul Durrant <paul@xen.org>
      e969f992
    • Stefan Hajnoczi's avatar
      Merge tag 'pull-sp-20231105' of https://gitlab.com/rth7680/qemu into staging · 3e01f114
      Stefan Hajnoczi authored 
      target/sparc: Explicitly compute condition codes

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# gpg: Signature made Mon 06 Nov 2023 04:09:46 HKT
# gpg:                using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg:                issuer "richard.henderson@linaro.org"
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [full]
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* tag 'pull-sp-20231105' of https://gitlab.com/rth7680/qemu

: (21 commits)
  target/sparc: Check for invalid cond in gen_compare_reg
  target/sparc: Implement UDIV inline
  target/sparc: Implement UDIVX and SDIVX inline
  target/sparc: Discard cpu_cond at the end of each insn
  target/sparc: Record entire jump condition in DisasContext
  target/sparc: Merge gen_op_next_insn into only caller
  target/sparc: Pass displacement to advance_jump_cond
  target/sparc: Merge advance_jump_uncond_{never,always} into advance_jump_cond
  target/sparc: Merge gen_branch2 into advance_pc
  target/sparc: Do flush_cond in advance_jump_cond
  target/sparc: Always copy conditions into a new temporary
  target/sparc: Change DisasCompare.c2 to int
  target/sparc: Remove DisasCompare.is_bool
  target/sparc: Remove CC_OP leftovers
  target/sparc: Remove CC_OP_TADDTV, CC_OP_TSUBTV
  target/sparc: Remove CC_OP_SUB, CC_OP_SUBX, CC_OP_TSUB
  target/sparc: Remove CC_OP_ADD, CC_OP_ADDX, CC_OP_TADD
  target/sparc: Remove CC_OP_DIV
  target/sparc: Remove CC_OP_LOGIC
  target/sparc: Split psr and xcc into components
  ...

Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
      3e01f114
    • Stefan Hajnoczi's avatar
      Merge tag 'migration-20231103-pull-request' of https://gitlab.com/juan.quintela/qemu into staging · f3604191
      Stefan Hajnoczi authored 
      Migration Pull request (20231103)

Hi

In this PULL:
- dirty limit fixes (hyman)
- coverity issues (juan)

Please apply.

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# gpg: Signature made Fri 03 Nov 2023 20:04:40 HKT
# gpg:                using RSA key 1899FF8EDEBF58CCEE034B82F487EF185872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>" [full]
# gpg:                 aka "Juan Quintela <quintela@trasno.org>" [full]
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03  4B82 F487 EF18 5872 D723

* tag 'migration-20231103-pull-request' of https://gitlab.com/juan.quintela/qemu

:
  migration: Unlock mutex in error case
  docs/migration: Add the dirty limit section
  tests/migration: Introduce dirty-limit into guestperf
  tests/migration: Introduce dirty-ring-size option into guestperf
  tests: Add migration dirty-limit capability test
  system/dirtylimit: Drop the reduplicative check
  system/dirtylimit: Fix a race situation

Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
      f3604191
    • Stefan Hajnoczi's avatar
      Merge tag 'dump-pull-request' of https://gitlab.com/marcandre.lureau/qemu into staging · 1d6e13c1
      Stefan Hajnoczi authored 
      dump queue

Hi

The "dump" queue, with:
- [PATCH v3 qemu 0/3] Allow dump-guest-memory to output standard kdump format
- [PATCH v2 0/5] dump: Minor fixes & improvements

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# gpg: Signature made Fri 03 Nov 2023 15:01:21 HKT
# gpg:                using RSA key 87A9BD933F87C606D276F62DDAE8E10975969CE5
# 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 'dump-pull-request' of https://gitlab.com/marcandre.lureau/qemu

:
  dump: Drop redundant check for empty dump
  dump: Improve some dump-guest-memory error messages
  dump: Recognize "fd:" protocols on Windows hosts
  dump: Fix g_array_unref(NULL) in dump-guest-memory
  dump: Rename qmp_dump_guest_memory() parameter to match QAPI schema
  dump: Add command interface for kdump-raw formats
  dump: Allow directly outputting raw kdump format
  dump: Pass DumpState to write_ functions

Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
      1d6e13c1
    • Stefan Hajnoczi's avatar
      Merge tag 'pull-loongarch-20231103' of https://gitlab.com/gaosong/qemu into staging · 9477a89c
      Stefan Hajnoczi authored 
      pull-loongarch-20231103

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# gpg: Signature made Fri 03 Nov 2023 14:16:02 HKT
# gpg:                using RSA key B8FF1DA0D2FDCB2DA09C6C2C40A2FFF239263EDF
# gpg: Good signature from "Song Gao <m17746591750@163.com>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: B8FF 1DA0 D2FD CB2D A09C  6C2C 40A2 FFF2 3926 3EDF

* tag 'pull-loongarch-20231103' of https://gitlab.com/gaosong/qemu

:
  linux-user/loongarch64: Add LASX sigcontext save/restore
  linux-user/loongarch64: Add LSX sigcontext save/restore
  linux-user/loongarch64: Use abi_{ulong,uint} types
  linux-user/loongarch64: setup_sigframe() set 'end' context size 0
  linux-user/loongarch64: Fix setup_extcontext alloc wrong fpu_context size
  linux-user/loongarch64: Use traps to track LSX/LASX usage
  target/loongarch: Support 4K page size
  target/loongarch: Implement query-cpu-model-expansion
  target/loongarch: Allow user enable/disable LSX/LASX features
  target/loongarch: Add cpu model 'max'

Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
      9477a89c
  5. Nov 05, 2023
  7. Nov 03, 2023