It is only used there, so we can make it static.
Once there, remove spice.h that it is not used.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>

---

fix David Edmonson ui/qemu-spice.h unintended removal

No need to declare a temporary variable.

Suggested-by: Juan Quintela <quintela@redhat.com>
Fixes: 1df36e8c6289 ("migration: Handle block device inactivation failures better")
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

Migration Pull request (take 2)

Remove the two atomic patches that broke mips32.

Please, apply.

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* tag 'migration-20230420-pull-request' of https://gitlab.com/juan.quintela/qemu

:
  migration: Pass migrate_caps_check() the old and new caps
  migration: rename enabled_capabilities to capabilities
  migration/postcopy: Detect file system on dest host
  vl.c: Create late backends before migration object
  util/mmap-alloc: qemu_fd_getfs()
  migration: Handle block device inactivation failures better
  migration: Rename normal to normal_pages
  migration: Rename duplicate to zero_pages
  migration: Make postcopy_requests atomic
  migration: Make dirty_sync_count atomic
  migration: Make downtime_bytes atomic
  migration: Make precopy_bytes atomic
  migration: Make dirty_sync_missed_zero_copy atomic
  migration: Make multifd_bytes atomic
  migration: Update atomic stats out of the mutex
  migration: Merge ram_counters and ram_atomic_counters
  migration: remove extra whitespace character for code style

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

We used to pass the old capabilities array and the new
capabilities as a list.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

It is clear from the context what that means, and such a long name
with the extra long names of the capabilities make very difficilut to
stay inside the 80 columns limit.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

Postcopy requires the memory support userfaultfd to work.  Right now we
check it but it's a bit too late (when switching to postcopy migration).

Do that early right at enabling of postcopy.

Note that this is still only a best effort because ramblocks can be
dynamically created.  We can add check in hostmem creations and fail if
postcopy enabled, but maybe that's too aggressive.

Still, we have chance to fail the most obvious where we know there's an
existing unsupported ramblock.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

The migration object may want to check against different types of memory
when initialized.  Delay the creation to be after late backends.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

This new helper fetches file system type for a fd.  Only Linux is
implemented so far.  Currently only tmpfs and hugetlbfs are defined,
but it can grow as needed.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

Consider what happens when performing a migration between two host
machines connected to an NFS server serving multiple block devices to
the guest, when the NFS server becomes unavailable.  The migration
attempts to inactivate all block devices on the source (a necessary
step before the destination can take over); but if the NFS server is
non-responsive, the attempt to inactivate can itself fail.  When that
happens, the destination fails to get the migrated guest (good,
because the source wasn't able to flush everything properly):

  (qemu) qemu-kvm: load of migration failed: Input/output error

at which point, our only hope for the guest is for the source to take
back control.  With the current code base, the host outputs a message, but then appears to resume:

  (qemu) qemu-kvm: qemu_savevm_state_complete_precopy_non_iterable: bdrv_inactivate_all() failed (-1)

  (src qemu)info status
   VM status: running

but a second migration attempt now asserts:

  (src qemu) qemu-kvm: ../block.c:6738: int bdrv_inactivate_recurse(BlockDriverState *): Assertion `!(bs->open_flags & BDRV_O_INACTIVE)' failed.

Whether the guest is recoverable on the source after the first failure
is debatable, but what we do not want is to have qemu itself fail due
to an assertion.  It looks like the problem is as follows:

In migration.c:migration_completion(), the source sets 'inactivate' to
true (since COLO is not enabled), then tries
savevm.c:qemu_savevm_state_complete_precopy() with a request to
inactivate block devices.  In turn, this calls
block.c:bdrv_inactivate_all(), which fails when flushing runs up
against the non-responsive NFS server.  With savevm failing, we are
now left in a state where some, but not all, of the block devices have
been inactivated; but migration_completion() then jumps to 'fail'
rather than 'fail_invalidate' and skips an attempt to reclaim those
those disks by calling bdrv_activate_all().  Even if we do attempt to
reclaim disks, we aren't taking note of failure there, either.

Thus, we have reached a state where the migration engine has forgotten
all state about whether a block device is inactive, because we did not
set s->block_inactive in enough places; so migration allows the source
to reach vm_start() and resume execution, violating the block layer
invariant that the guest CPUs should not be restarted while a device
is inactive.  Note that the code in migration.c:migrate_fd_cancel()
will also try to reactivate all block devices if s->block_inactive was
set, but because we failed to set that flag after the first failure,
the source assumes it has reclaimed all devices, even though it still
has remaining inactivated devices and does not try again.  Normally,
qmp_cont() will also try to reactivate all disks (or correctly fail if
the disks are not reclaimable because NFS is not yet back up), but the
auto-resumption of the source after a migration failure does not go
through qmp_cont().  And because we have left the block layer in an
inconsistent state with devices still inactivated, the later migration
attempt is hitting the assertion failure.

Since it is important to not resume the source with inactive disks,
this patch marks s->block_inactive before attempting inactivation,
rather than after succeeding, in order to prevent any vm_start() until
it has successfully reactivated all devices.

See also https://bugzilla.redhat.com/show_bug.cgi?id=2058982



Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Acked-by: Lukas Straub <lukasstraub2@web.de>
Tested-by: Lukas Straub <lukasstraub2@web.de>
Signed-off-by: Juan Quintela <quintela@redhat.com>

Rest of counters that refer to pages has a _pages suffix.
And historically, this showed the number of full pages transferred.
The name "normal" refered to the fact that they were sent without any
optimization (compression, xbzrle, zero_page, ...).

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>

Rest of counters that refer to pages has a _pages suffix.
And historically, this showed the number of pages composed of the same
character, here comes the name "duplicated".  But since years ago, it
refers to the number of zero_pages.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>

In the spirit of:

commit 394d323bc3451e4d07f13341cb8817fac8dfbadd
Author: Peter Xu <peterx@redhat.com>
Date:   Tue Oct 11 17:55:51 2022 -0400

    migration: Use atomic ops properly for page accountings

Reviewed-by: David Edmondson <david.edmondson@oracle.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

Reviewed-by: David Edmondson <david.edmondson@oracle.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

Using MgrationStats as type for ram_counters mean that we didn't have
to re-declare each value in another struct. The need of atomic
counters have make us to create MigrationAtomicStats for this atomic
counters.

Create RAMStats type which is a merge of MigrationStats and
MigrationAtomicStats removing unused members.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>

---

Fix typos found by David Edmondson

Fix code style.

Signed-off-by: 李皆俊 <a_lijiejun@163.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

tcg cleanups:
  - Remove tcg_abort()
  - Split out extensions as known backend interfaces
  - Put the separate extensions together as tcg_out_movext
  - Introduce tcg_out_xchg as a backend interface
  - Clear TCGLabelQemuLdst on allocation
  - Avoid redundant extensions for riscv

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* tag 'pull-tcg-20230423' of https://gitlab.com/rth7680/qemu

:
  tcg/riscv: Conditionalize tcg_out_exts_i32_i64
  tcg: Clear TCGLabelQemuLdst on allocation
  tcg: Introduce tcg_out_xchg
  tcg: Introduce tcg_out_movext
  tcg: Split out tcg_out_extrl_i64_i32
  tcg: Split out tcg_out_extu_i32_i64
  tcg: Split out tcg_out_exts_i32_i64
  tcg: Split out tcg_out_ext32u
  tcg: Split out tcg_out_ext32s
  tcg: Split out tcg_out_ext16u
  tcg: Split out tcg_out_ext16s
  tcg: Split out tcg_out_ext8u
  tcg: Split out tcg_out_ext8s
  tcg: Replace tcg_abort with g_assert_not_reached
  tcg: Replace if + tcg_abort with tcg_debug_assert

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Since TCG_TYPE_I32 values are kept sign-extended in registers, via "w"
instructions, we don't need to extend if the register matches.
This is already relied upon by comparisons.

Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

We will want a backend interface for register swapping.
This is only properly defined for x86; all others get a
stub version that always indicates failure.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

This is common code in most qemu_{ld,st} slow paths, extending the
input value for the store helper data argument or extending the
return value from the load helper.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

We will need a backend interface for type truncation.  For those backends
that did not enable TCG_TARGET_HAS_extrl_i64_i32, use tcg_out_mov.
Use it in tcg_reg_alloc_op in the meantime.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

We will need a backend interface for type extension with zero.
Use it in tcg_reg_alloc_op in the meantime.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

We will need a backend interface for type extension with sign.
Use it in tcg_reg_alloc_op in the meantime.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

We will need a backend interface for performing 32-bit zero-extend.
Use it in tcg_reg_alloc_op in the meantime.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

We will need a backend interface for performing 32-bit sign-extend.
Use it in tcg_reg_alloc_op in the meantime.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

We will need a backend interface for performing 16-bit zero-extend.
Use it in tcg_reg_alloc_op in the meantime.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

We will need a backend interface for performing 16-bit sign-extend.
Use it in tcg_reg_alloc_op in the meantime.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

We will need a backend interface for performing 8-bit zero-extend.
Use it in tcg_reg_alloc_op in the meantime.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

We will need a backend interface for performing 8-bit sign-extend.
Use it in tcg_reg_alloc_op in the meantime.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Hexagon update

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# gpg: Good signature from "Taylor Simpson (Rock on) <tsimpson@quicinc.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: 3635 C788 CE62 B91F D4C5  9AB4 7B02 44FB 12DE 4422

* tag 'pull-hex-20230421' of https://github.com/quic/qemu

:
  Hexagon (target/hexagon) Add overrides for cache/sync/barrier instructions
  Hexagon (target/hexagon) Remove unused slot variable in helpers
  Hexagon (tests/tcg/hexagon) Move HVX test infra to header file
  Hexagon (target/hexagon) Updates to USR should use get_result_gpr
  Hexagon (target/hexagon) Add overrides for count trailing zeros/ones
  Hexagon (target/hexagon) Merge arguments to probe_pkt_scalar_hvx_stores
  Hexagon (target/hexagon) Remove redundant/unused macros
  Use black code style for python scripts
  Use f-strings in python scripts
  Hexagon (translate.c): avoid redundant PC updates on COF

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

* Optional use of Meson wrap for slirp
* Coverity fixes
* Avoid -Werror=maybe-uninitialized
* Mark coroutine QMP command functions as coroutine_fn
* Mark functions that suspend as coroutine_mixed_fn
* target/i386: Fix SGX CPUID leaf
* First batch of qatomic_mb_read() removal
* Small atomic.rst improvement
* NBD cleanup
* Update libvirt-ci submodule

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# gpg: WARNING: This key is not certified with a trusted signature!
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* tag 'for-upstream' of https://gitlab.com/bonzini/qemu

: (25 commits)
  tests: lcitool: Switch to OpenSUSE Leap 15.4
  tests: libvirt-ci: Update to commit '2fa24dce8bc'
  configure: Honour cross-prefix when finding ObjC compiler
  coverity: unify Fedora dockerfiles
  nbd: a BlockExport always has a BlockBackend
  docs: explain effect of smp_read_barrier_depends() on modern architectures
  qemu-coroutine: remove qatomic_mb_read()
  postcopy-ram: do not use qatomic_mb_read
  block-backend: remove qatomic_mb_read()
  target/i386: Change wrong XFRM value in SGX CPUID leaf
  monitor: mark mixed functions that can suspend
  migration: mark mixed functions that can suspend
  io: mark mixed functions that can suspend
  qapi-gen: mark coroutine QMP command functions as coroutine_fn
  target/mips: tcg: detect out-of-bounds accesses to cpu_gpr and cpu_gpr_hi
  coverity: update COMPONENTS.md
  lasi: fix RTC migration
  target/i386: Avoid unreachable variable declaration in mmu_translate()
  configure: Avoid -Werror=maybe-uninitialized
  tests: bios-tables-test: replace memset with initializer
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Merge tpm 2023/04/20 v1

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# =ML27
# -----END PGP SIGNATURE-----
# gpg: Signature made Thu 20 Apr 2023 01:20:26 PM BST
# gpg:                using RSA key B818B9CADF9089C2D5CEC66B75AD65802A0B4211
# gpg: Good signature from "Stefan Berger <stefanb@linux.vnet.ibm.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: B818 B9CA DF90 89C2 D5CE  C66B 75AD 6580 2A0B 4211

* tag 'pull-tpm-2023-04-20-1' of https://github.com/stefanberger/qemu-tpm

:
  qtest: Add a test case for TPM TIS I2C connected to Aspeed I2C controller
  qtest: Move tpm_util_tis_transmit() into tpm-tis-utils.c and rename it
  qtest: Add functions for accessing devices on Aspeed I2C controller
  tests/avocado/aspeed: Add TPM TIS I2C test
  tpm: Add support for TPM device over I2C bus
  tpm: Extend common APIs to support TPM TIS I2C
  docs: Add support for TPM devices over I2C bus

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Most of these are not modelled in QEMU, so save the overhead of
calling a helper.

The only exception is dczeroa.  It assigns to hex_dczero_addr, which
is handled during packet commit.

Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230410202402.2856852-1-tsimpson@quicinc.com>