Merge tag 'mem-2024-09-24' of https://github.com/davidhildenbrand/qemu into staging

Hi,

"Host Memory Backends" and "Memory devices" queue ("mem"):
- Kconfig fix for virtio-based memory devices
- vi

Merge tag 'mem-2024-09-24' of https://github.com/davidhildenbrand/qemu into staging

Hi,

"Host Memory Backends" and "Memory devices" queue ("mem"):
- Kconfig fix for virtio-based memory devices
- virtio-mem support for suspend+wake-up with plugged memory
- hostmem fix when specifying "merge=off"

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# gpg: using RSA key 1BD9CAAD735C4C3A460DFCCA4DDE10F700FF835A
# gpg: issuer "david@redhat.com"
# gpg: Good signature from "David Hildenbrand <david@redhat.com>" [marginal]
# gpg: aka "David Hildenbrand <davidhildenbrand@gmail.com>" [full]
# gpg: aka "David Hildenbrand <hildenbr@in.tum.de>" [unknown]
# Primary key fingerprint: 1BD9 CAAD 735C 4C3A 460D FCCA 4DDE 10F7 00FF 835A

* tag 'mem-2024-09-24' of https://github.com/davidhildenbrand/qemu:
hostmem: Apply merge property after the memory region is initialized
virtio-mem: Add support for suspend+wake-up with plugged memory
virtio-mem: Use new Resettable framework instead of LegacyReset
reset: Add RESET_TYPE_WAKEUP
reset: Use ResetType for qemu_devices_reset() and MachineClass::reset()
virtio: kconfig: memory devices are PCI only

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

hostmem: Apply merge property after the memory region is initialized

The semantic change has been introduced by commit 5becdc0ab0 ("hostmem:
simplify the code for merge and dump properties") even it

hostmem: Apply merge property after the memory region is initialized

The semantic change has been introduced by commit 5becdc0ab0 ("hostmem:
simplify the code for merge and dump properties") even it clarifies that
no senmatic change has been introduced. After the commit, the merge
property can be applied even the corresponding memory region isn't
initialized yet. This leads to crash dump by the following command
lines.

# /home/gavin/sandbox/qemu.main/build/qemu-system-aarch64 \
-accel kvm -machine virt -cpu host \
-object memory-backend-ram,id=mem-memN0,size=4096M,merge=off
:
qemu-system-aarch64: ../system/memory.c:2419: memory_region_get_ram_ptr: \
Assertion `mr->ram_block' failed.

Fix it by applying the merge property only when the memory region is
initialized.

Message-ID: <20240915233117.478169-1-gshan@redhat.com>
Fixes: 5becdc0ab083 ("hostmem: simplify the code for merge and dump properties")
Reported-by: Zhenyu Zhang <zhenyzha@redhat.com>
Tested-by: Zhenyu Zhang <zhenyzha@redhat.com>
Signed-off-by: Gavin Shan <gshan@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>

show more ...

Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* scsi-disk: Don't silently truncate serial number
* backends/hostmem: Report error on unavailable qemu_madvise() features or

Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* scsi-disk: Don't silently truncate serial number
* backends/hostmem: Report error on unavailable qemu_madvise() features or unaligned memory sizes
* target/i386: fixes and documentation for INHIBIT_IRQ/TF/RF and debugging
* i386/hvf: Adds support for INVTSC cpuid bit
* i386/hvf: Fixes for dirty memory tracking
* i386/hvf: Use hv_vcpu_interrupt() and hv_vcpu_run_until()
* hvf: Cleanups
* stubs: fixes for --disable-system build
* i386/kvm: support for FRED
* i386/kvm: fix MCE handling on AMD hosts

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# gpg: using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
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# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" [full]

* tag 'for-upstream' of https://gitlab.com/bonzini/qemu: (42 commits)
python: mkvenv: remove ensure command
Revert "python: use vendored tomli"
i386: Add support for overflow recovery
i386: Add support for SUCCOR feature
i386: Fix MCE support for AMD hosts
docs: i386: pc: Avoid mentioning limit of maximum vCPUs
target/i386: Add get/set/migrate support for FRED MSRs
target/i386: enumerate VMX nested-exception support
vmxcap: add support for VMX FRED controls
target/i386: mark CR4.FRED not reserved
target/i386: add support for FRED in CPUID enumeration
hvf: Makes assert_hvf_ok report failed expression
i386/hvf: Updates API usage to use modern vCPU run function
i386/hvf: In kick_vcpu use hv_vcpu_interrupt to force exit
i386/hvf: Fixes dirty memory tracking by page granularity RX->RWX change
hvf: Consistent types for vCPU handles
i386/hvf: Fixes some compilation warnings
i386/hvf: Adds support for INVTSC cpuid bit
stubs/meson: Fix qemuutil build when --disable-system
scsi-disk: Don't silently truncate serial number
...

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

show more ...

hostmem: simplify the code for merge and dump properties

No semantic change, just simpler control flow.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzin

hostmem: simplify the code for merge and dump properties

No semantic change, just simpler control flow.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

show more ...

machine, hostmem: improve error messages for unsupported features

Detect early unsupported MADV_MERGEABLE and MADV_DONTDUMP, and print a clearer
error message that points to the deficiency of the ho

machine, hostmem: improve error messages for unsupported features

Detect early unsupported MADV_MERGEABLE and MADV_DONTDUMP, and print a clearer
error message that points to the deficiency of the host.

Cc: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

show more ...

backends/hostmem: Report error when memory size is unaligned

If memory-backend-{file,ram} has a size that's not aligned to
underlying page size it is not only wasteful, but also may lead
to hard to

backends/hostmem: Report error when memory size is unaligned

If memory-backend-{file,ram} has a size that's not aligned to
underlying page size it is not only wasteful, but also may lead
to hard to debug behaviour. For instance, in case
memory-backend-file and hugepages, madvise() and mbind() fail.
Rightfully so, page is the smallest unit they can work with. And
even though an error is reported, the root cause it not very
clear:

qemu-system-x86_64: Couldn't set property 'dump' on 'memory-backend-file': Invalid argument

After this commit:

qemu-system-x86_64: backend 'memory-backend-file' memory size must be multiple of 2 MiB

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Mario Casquero <mcasquer@redhat.com>
Message-ID: <b5b9f9c6bba07879fb43f3c6f496c69867ae3716.1717584048.git.mprivozn@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

show more ...

Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* cleanups for stubs
* do not link pixman automatically into all targets
* optimize computation of VGA dirty memory region
*

Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* cleanups for stubs
* do not link pixman automatically into all targets
* optimize computation of VGA dirty memory region
* kvm: use configs/ definition to conditionalize debug support
* hw: Add compat machines for 9.1
* target/i386: add guest-phys-bits cpu property
* target/i386: Introduce Icelake-Server-v7 and SierraForest models
* target/i386: Export RFDS bit to guests
* q35: SMM ranges cleanups
* target/i386: basic support for confidential guests
* linux-headers: update headers
* target/i386: SEV: use KVM_SEV_INIT2 if possible
* kvm: Introduce support for memory_attributes
* RAMBlock: Add support of KVM private guest memfd
* Consolidate use of warn_report_once()
* pythondeps.toml: warn about updates needed to docs/requirements.txt
* target/i386: always write 32-bits for SGDT and SIDT

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# gpg: issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [undefined]
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* tag 'for-upstream' of https://gitlab.com/bonzini/qemu: (63 commits)
target/i386/translate.c: always write 32-bits for SGDT and SIDT
pythondeps.toml: warn about updates needed to docs/requirements.txt
accel/tcg/icount-common: Consolidate the use of warn_report_once()
target/i386/cpu: Merge the warning and error messages for AMD HT check
target/i386/cpu: Consolidate the use of warn_report_once()
target/i386/host-cpu: Consolidate the use of warn_report_once()
kvm/tdx: Ignore memory conversion to shared of unassigned region
kvm/tdx: Don't complain when converting vMMIO region to shared
kvm: handle KVM_EXIT_MEMORY_FAULT
physmem: Introduce ram_block_discard_guest_memfd_range()
RAMBlock: make guest_memfd require uncoordinated discard
HostMem: Add mechanism to opt in kvm guest memfd via MachineState
kvm/memory: Make memory type private by default if it has guest memfd backend
kvm: Enable KVM_SET_USER_MEMORY_REGION2 for memslot
RAMBlock: Add support of KVM private guest memfd
kvm: Introduce support for memory_attributes
trace/kvm: Split address space and slot id in trace_kvm_set_user_memory()
hw/i386/sev: Use legacy SEV VM types for older machine types
i386/sev: Add 'legacy-vm-type' parameter for SEV guest objects
target/i386: SEV: use KVM_SEV_INIT2 if possible
...

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

show more ...

HostMem: Add mechanism to opt in kvm guest memfd via MachineState

Add a new member "guest_memfd" to memory backends. When it's set
to true, it enables RAM_GUEST_MEMFD in ram_flags, thus private kvm

HostMem: Add mechanism to opt in kvm guest memfd via MachineState

Add a new member "guest_memfd" to memory backends. When it's set
to true, it enables RAM_GUEST_MEMFD in ram_flags, thus private kvm
guest_memfd will be allocated during RAMBlock allocation.

Memory backend's @guest_memfd is wired with @require_guest_memfd
field of MachineState. It avoid looking up the machine in phymem.c.

MachineState::require_guest_memfd is supposed to be set by any VMs
that requires KVM guest memfd as private memory, e.g., TDX VM.

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-ID: <20240320083945.991426-8-michael.roth@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

show more ...

Merge tag 'mem-2024-02-06-v3' of https://github.com/davidhildenbrand/qemu into staging

Hi,

"Host Memory Backends" and "Memory devices" queue ("mem"):
- Reintroduce memory region size checks for mem

Merge tag 'mem-2024-02-06-v3' of https://github.com/davidhildenbrand/qemu into staging

Hi,

"Host Memory Backends" and "Memory devices" queue ("mem"):
- Reintroduce memory region size checks for memory devices; the removal
lead to some undesired side effects
- Preallocate memory of memory backends in selected configurations
asynchronously (so we preallocate concurrently), to speed up QEMU
startup time.

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# gpg: Signature made Tue 06 Feb 2024 07:16:07 GMT
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# gpg: issuer "david@redhat.com"
# gpg: Good signature from "David Hildenbrand <david@redhat.com>" [marginal]
# gpg: aka "David Hildenbrand <davidhildenbrand@gmail.com>" [full]
# gpg: aka "David Hildenbrand <hildenbr@in.tum.de>" [unknown]
# Primary key fingerprint: 1BD9 CAAD 735C 4C3A 460D FCCA 4DDE 10F7 00FF 835A

* tag 'mem-2024-02-06-v3' of https://github.com/davidhildenbrand/qemu:
oslib-posix: initialize backend memory objects in parallel
memory-device: reintroduce memory region size check
hv-balloon: use get_min_alignment() to express 32 GiB alignment

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

oslib-posix: initialize backend memory objects in parallel

QEMU initializes preallocated backend memory as the objects are parsed from
the command line. This is not optimal in some cases (e.g. memor

oslib-posix: initialize backend memory objects in parallel

QEMU initializes preallocated backend memory as the objects are parsed from
the command line. This is not optimal in some cases (e.g. memory spanning
multiple NUMA nodes) because the memory objects are initialized in series.

Allow the initialization to occur in parallel (asynchronously). In order to
ensure optimal thread placement, asynchronous initialization requires prealloc
context threads to be in use.

Signed-off-by: Mark Kanda <mark.kanda@oracle.com>
Message-ID: <20240131165327.3154970-2-mark.kanda@oracle.com>
Tested-by: Mario Casquero <mcasquer@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>

show more ...

Merge tag 'pull-trivial-patches' of https://gitlab.com/mjt0k/qemu into staging

trivial patches for 2024-01-31

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Merge tag 'pull-trivial-patches' of https://gitlab.com/mjt0k/qemu into staging

trivial patches for 2024-01-31

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# gpg: using RSA key 7B73BAD68BE7A2C289314B22701B4F6B1A693E59
# gpg: issuer "mjt@tls.msk.ru"
# gpg: Good signature from "Michael Tokarev <mjt@tls.msk.ru>" [full]
# gpg: aka "Michael Tokarev <mjt@corpit.ru>" [full]
# gpg: aka "Michael Tokarev <mjt@debian.org>" [full]
# Primary key fingerprint: 6EE1 95D1 886E 8FFB 810D 4324 457C E0A0 8044 65C5
# Subkey fingerprint: 7B73 BAD6 8BE7 A2C2 8931 4B22 701B 4F6B 1A69 3E59

* tag 'pull-trivial-patches' of https://gitlab.com/mjt0k/qemu: (21 commits)
hw/hyperv: Include missing headers
hw/intc/xics: Include missing 'cpu.h' header
hw/arm: Add `\n` to hint message
hw/loongarch: Add `\n` to hint message
hw/i386: Add `\n` to hint message
backends/hostmem: Fix block comments style (checkpatch.pl warnings)
misc: Clean up includes
riscv: Clean up includes
cxl: Clean up includes
include: Clean up includes
m68k: Clean up includes
acpi: Clean up includes
aspeed: Clean up includes
disas/riscv: Clean up includes
hyperv: Clean up includes
scripts/clean-includes: Update exclude list
mailmap: Fix Stefan Weil email
qemu-docs: Update options for graphical frontends
qapi/migration.json: Fix the member name for MigrationCapability
colo: examples: remove mentions of script= and (wrong) downscript=
...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

backends/hostmem: Fix block comments style (checkpatch.pl warnings)

While re-indenting code in host_memory_backend_memory_complete(),
we triggered various "Block comments use a leading /* on a separ

backends/hostmem: Fix block comments style (checkpatch.pl warnings)

While re-indenting code in host_memory_backend_memory_complete(),
we triggered various "Block comments use a leading /* on a separate
line" warnings from checkpatch.pl. Correct the comments style.

Fixes: e199f7ad4d ("backends: Simplify host_memory_backend_memory_complete()")
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

show more ...

Merge tag 'hw-cpus-20240105' of https://github.com/philmd/qemu into staging

HW core patch queue

- Unify CPU QOM type checks (Gavin)
- Simplify uses of some CPU related property (Philippe)
(start-

Merge tag 'hw-cpus-20240105' of https://github.com/philmd/qemu into staging

HW core patch queue

- Unify CPU QOM type checks (Gavin)
- Simplify uses of some CPU related property (Philippe)
(start-powered-off, ARM reset-cbar and mp-affinity)
- Header and documentation cleanups (Zhao, Philippe)
- Have Memory API return boolean indicating possible error
- Fix frame filter mask in CAN sja1000 model (Pavel)
- QOM embed MCF5206 timer into SoC (Thomas)
- Simplify LEON3 qemu_irq_ack handler (Clément)

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# -----END PGP SIGNATURE-----
# gpg: Signature made Fri 05 Jan 2024 15:41:16 GMT
# gpg: using RSA key FAABE75E12917221DCFD6BB2E3E32C2CDEADC0DE
# gpg: Good signature from "Philippe Mathieu-Daudé (F4BUG) <f4bug@amsat.org>" [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: FAAB E75E 1291 7221 DCFD 6BB2 E3E3 2C2C DEAD C0DE

* tag 'hw-cpus-20240105' of https://github.com/philmd/qemu: (71 commits)
target/sparc: Simplify qemu_irq_ack
hw/net/can/sja1000: fix bug for single acceptance filter and standard frame
hw/m68k/mcf5206: Embed m5206_timer_state in m5206_mbar_state
hw/pci-host/raven: Propagate error in raven_realize()
hw/nvram: Simplify memory_region_init_rom_device() calls
hw/misc: Simplify memory_region_init_ram_from_fd() calls
hw/sparc: Simplify memory_region_init_ram_nomigrate() calls
hw/arm: Simplify memory_region_init_rom() calls
hw: Simplify memory_region_init_ram() calls
misc: Simplify qemu_prealloc_mem() calls
util/oslib: Have qemu_prealloc_mem() handler return a boolean
backends: Reduce variable scope in host_memory_backend_memory_complete
backends: Have HostMemoryBackendClass::alloc() handler return a boolean
backends: Simplify host_memory_backend_memory_complete()
backends: Use g_autofree in HostMemoryBackendClass::alloc() handlers
memory: Have memory_region_init_ram_from_fd() handler return a boolean
memory: Have memory_region_init_ram_from_file() handler return a boolean
memory: Have memory_region_init_resizeable_ram() return a boolean
memory: Have memory_region_init_rom_device() handler return a boolean
memory: Simplify memory_region_init_rom_device_nomigrate() calls
...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

misc: Simplify qemu_prealloc_mem() calls

Since qemu_prealloc_mem() returns whether or not an error
occured, we don't need to check the @errp pointer. Remove
local_err uses when we can return directl

misc: Simplify qemu_prealloc_mem() calls

Since qemu_prealloc_mem() returns whether or not an error
occured, we don't need to check the @errp pointer. Remove
local_err uses when we can return directly.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Message-Id: <20231120213301.24349-20-philmd@linaro.org>

show more ...

backends: Reduce variable scope in host_memory_backend_memory_complete

Reduce the &local_err variable use and remove the 'out:' label.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Revi

backends: Reduce variable scope in host_memory_backend_memory_complete

Reduce the &local_err variable use and remove the 'out:' label.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Message-Id: <20231120213301.24349-18-philmd@linaro.org>

show more ...

backends: Have HostMemoryBackendClass::alloc() handler return a boolean

Following the example documented since commit e3fe3988d7 ("error:
Document Error API usage rules"), have HostMemoryBackendClas

backends: Have HostMemoryBackendClass::alloc() handler return a boolean

Following the example documented since commit e3fe3988d7 ("error:
Document Error API usage rules"), have HostMemoryBackendClass::alloc
return a boolean indicating whether an error is set or not.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Message-Id: <20231120213301.24349-17-philmd@linaro.org>

show more ...

backends: Simplify host_memory_backend_memory_complete()

Return early if bc->alloc is NULL. De-indent the if() ladder.

Note, this avoids a pointless call to error_propagate() with
errp=NULL at the

backends: Simplify host_memory_backend_memory_complete()

Return early if bc->alloc is NULL. De-indent the if() ladder.

Note, this avoids a pointless call to error_propagate() with
errp=NULL at the 'out:' label.

Change trivial when reviewed with 'git-diff --ignore-all-space'.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Message-Id: <20231120213301.24349-16-philmd@linaro.org>

show more ...

Merge tag 'mem-2023-01-02' of https://github.com/davidhildenbrand/qemu into staging

Hi,

"Host Memory Backends" and "Memory devices" queue ("mem"):
- virtio-mem fixes
- Use new MPOL_PREFERRED_MANY m

Merge tag 'mem-2023-01-02' of https://github.com/davidhildenbrand/qemu into staging

Hi,

"Host Memory Backends" and "Memory devices" queue ("mem"):
- virtio-mem fixes
- Use new MPOL_PREFERRED_MANY mbind() policy for memory backends if
possible

# gpg: Signature made Mon 02 Jan 2023 11:22:04 GMT
# gpg: using RSA key 1BD9CAAD735C4C3A460DFCCA4DDE10F700FF835A
# gpg: issuer "david@redhat.com"
# gpg: Good signature from "David Hildenbrand <david@redhat.com>" [marginal]
# gpg: aka "David Hildenbrand <davidhildenbrand@gmail.com>" [full]
# gpg: aka "David Hildenbrand <hildenbr@in.tum.de>" [unknown]
# Primary key fingerprint: 1BD9 CAAD 735C 4C3A 460D FCCA 4DDE 10F7 00FF 835A

* tag 'mem-2023-01-02' of https://github.com/davidhildenbrand/qemu:
hostmem: Honor multiple preferred nodes if possible
virtio-mem: Fix typo in function name
virtio-mem: Fix the iterator variable in a vmem->rdl_list loop
virtio-mem: Fix the bitmap index of the section offset

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

hostmem: Honor multiple preferred nodes if possible

If a memory-backend is configured with mode
HOST_MEM_POLICY_PREFERRED then
host_memory_backend_memory_complete() calls mbind() as:

mbind(..., M

hostmem: Honor multiple preferred nodes if possible

If a memory-backend is configured with mode
HOST_MEM_POLICY_PREFERRED then
host_memory_backend_memory_complete() calls mbind() as:

mbind(..., MPOL_PREFERRED, nodemask, ...);

Here, 'nodemask' is a bitmap of host NUMA nodes and corresponds
to the .host-nodes attribute. Therefore, there can be multiple
nodes specified. However, the documentation to MPOL_PREFERRED
says:

MPOL_PREFERRED
This mode sets the preferred node for allocation. ...
If nodemask specifies more than one node ID, the first node
in the mask will be selected as the preferred node.

Therefore, only the first node is honored and the rest is
silently ignored. Well, with recent changes to the kernel and
numactl we can do better.

The Linux kernel added in v5.15 via commit cfcaa66f8032
("mm/hugetlb: add support for mempolicy MPOL_PREFERRED_MANY")
support for MPOL_PREFERRED_MANY, which accepts multiple preferred
NUMA nodes instead.

Then, numa_has_preferred_many() API was introduced to numactl
(v2.0.15~26) allowing applications to query kernel support.

Wiring this all together, we can pass MPOL_PREFERRED_MANY to the
mbind() call instead and stop ignoring multiple nodes, silently.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Message-Id: <a0b4adce1af5bd2344c2218eb4a04b3ff7bcfdb4.1671097918.git.mprivozn@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>

show more ...

Merge tag 'mem-2022-10-28' of https://github.com/davidhildenbrand/qemu into staging

Hi,

"Host Memory Backends" and "Memory devices" queue ("mem"):
- Fix NVDIMM error message
- Add ThreadContext use

Merge tag 'mem-2022-10-28' of https://github.com/davidhildenbrand/qemu into staging

Hi,

"Host Memory Backends" and "Memory devices" queue ("mem"):
- Fix NVDIMM error message
- Add ThreadContext user-creatable object and wire it up for NUMA-aware
hostmem preallocation

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# -----END PGP SIGNATURE-----
# gpg: Signature made Fri 28 Oct 2022 05:44:16 EDT
# gpg: using RSA key 1BD9CAAD735C4C3A460DFCCA4DDE10F700FF835A
# gpg: issuer "david@redhat.com"
# gpg: Good signature from "David Hildenbrand <david@redhat.com>" [unknown]
# gpg: aka "David Hildenbrand <davidhildenbrand@gmail.com>" [full]
# gpg: aka "David Hildenbrand <hildenbr@in.tum.de>" [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: 1BD9 CAAD 735C 4C3A 460D FCCA 4DDE 10F7 00FF 835A

* tag 'mem-2022-10-28' of https://github.com/davidhildenbrand/qemu:
vl: Allow ThreadContext objects to be created before the sandbox option
hostmem: Allow for specifying a ThreadContext for preallocation
util: Make qemu_prealloc_mem() optionally consume a ThreadContext
util: Add write-only "node-affinity" property for ThreadContext
util: Introduce ThreadContext user-creatable object
util: Introduce qemu_thread_set_affinity() and qemu_thread_get_affinity()
util: Cleanup and rename os_mem_prealloc()
hw/mem/nvdimm: fix error message for 'unarmed' flag

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

show more ...

hostmem: Allow for specifying a ThreadContext for preallocation

Let's allow for specifying a thread context via the "prealloc-context"
property. When set, preallcoation threads will be crated via th

hostmem: Allow for specifying a ThreadContext for preallocation

Let's allow for specifying a thread context via the "prealloc-context"
property. When set, preallcoation threads will be crated via the
thread context -- inheriting the same CPU affinity as the thread
context.

Pinning preallcoation threads to CPUs can heavily increase performance
in NUMA setups, because, preallocation from a CPU close to the target
NUMA node(s) is faster then preallocation from a CPU further remote,
simply because of memory bandwidth for initializing memory with zeroes.
This is especially relevant for very large VMs backed by huge/gigantic
pages, whereby preallocation is mandatory.

Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Message-Id: <20221014134720.168738-7-david@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>

show more ...

util: Make qemu_prealloc_mem() optionally consume a ThreadContext

... and implement it under POSIX. When a ThreadContext is provided,
create new threads via the context such that these new threads o

util: Make qemu_prealloc_mem() optionally consume a ThreadContext

... and implement it under POSIX. When a ThreadContext is provided,
create new threads via the context such that these new threads obtain a
properly configured CPU affinity.

Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Message-Id: <20221014134720.168738-6-david@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>

show more ...

util: Cleanup and rename os_mem_prealloc()

Let's
* give the function a "qemu_*" style name
* make sure the parameters in the implementation match the prototype
* rename smp_cpus to max_threads, whic

util: Cleanup and rename os_mem_prealloc()

Let's
* give the function a "qemu_*" style name
* make sure the parameters in the implementation match the prototype
* rename smp_cpus to max_threads, which makes the semantics of that
parameter clearer

... and add a function documentation.

Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Message-Id: <20221014134720.168738-2-david@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>

show more ...

Merge tag 's390x-pull-request-2022-08-30' of https://gitlab.com/thuth/qemu into staging

* Compat machine types for QEMU 7.2
* Add feature bit for the "processor-activity-instrumentation extension"
*

Merge tag 's390x-pull-request-2022-08-30' of https://gitlab.com/thuth/qemu into staging

* Compat machine types for QEMU 7.2
* Add feature bit for the "processor-activity-instrumentation extension"
* Fix emulation of CLFIT and CLGIT instructions
* Fix hugepages support on s390x with the memfd memory-backend

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# gpg: Signature made Tue 30 Aug 2022 09:23:19 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 's390x-pull-request-2022-08-30' of https://gitlab.com/thuth/qemu:
util/mmap-alloc: Remove qemu_mempath_getpagesize()
softmmu/physmem: Remove the ifdef __linux__ around the pagesize functions
backends/hostmem: Fix support of memory-backend-memfd in qemu_maxrampagesize()
target/s390x: Fix CLFIT and CLGIT immediate size
s390x/cpumodel: add stfl197 processor-activity-instrumentation extension 1
hw: Add compat machines for 7.2

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

show more ...

backends/hostmem: Fix support of memory-backend-memfd in qemu_maxrampagesize()

It is currently not possible yet to use "memory-backend-memfd" on s390x
with hugepages enabled. This problem is caused

backends/hostmem: Fix support of memory-backend-memfd in qemu_maxrampagesize()

It is currently not possible yet to use "memory-backend-memfd" on s390x
with hugepages enabled. This problem is caused by qemu_maxrampagesize()
not taking memory-backend-memfd objects into account yet, so the code
in s390_memory_init() fails to enable the huge page support there via
s390_set_max_pagesize(). Fix it by generalizing the code, so that it
looks at qemu_ram_pagesize(memdev->mr.ram_block) instead of re-trying
to get the information from the filesystem.

Suggested-by: David Hildenbrand <david@redhat.com>
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2116496
Message-Id: <20220810125720.3849835-2-thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

show more ...