Merge tag 'hw-misc-20241203' of https://github.com/philmd/qemu into staging

Misc fixes for QEMU v9.2.0

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Merge tag 'hw-misc-20241203' of https://github.com/philmd/qemu into staging

Misc fixes for QEMU v9.2.0

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# gpg: Signature made Tue 03 Dec 2024 11:29:45 GMT
# gpg: using RSA key FAABE75E12917221DCFD6BB2E3E32C2CDEADC0DE
# gpg: Good signature from "Philippe Mathieu-Daudé (F4BUG) <f4bug@amsat.org>" [full]
# Primary key fingerprint: FAAB E75E 1291 7221 DCFD 6BB2 E3E3 2C2C DEAD C0DE

* tag 'hw-misc-20241203' of https://github.com/philmd/qemu:
system: Select HVF by default when no other accelerator is available
tests/qtest: add test for querying balloon guest stats
tests/qtest: drop 'fuzz-' prefix from virtio-balloon test
hw/virtio: fix crash in processing balloon stats
hw/display/vga: Do not reset 'big_endian_fb' in vga_common_reset()
target/riscv: Avoid bad shift in riscv_cpu_do_interrupt()
hw/core/machine: diagnose wrapping of maxmem
MAINTAINERS: update email addr for Brian Cain
meson: Add missing SDL dependency to system/main.c
MAINTAINERS: add myself as the maintainer for LoongArch VirtMachine
ui/cocoa: Temporarily ignore annoying deprecated declaration warnings
hw/openrisc/openrisc_sim: keep serial@90000000 as default
hw/openrisc: Fixed undercounting of TTCR in continuous mode

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

show more ...

hw/core/machine: diagnose wrapping of maxmem

The 'maxmem' parameter parsed on the command line is held in uint64_t
and then assigned to the MachineState field that is 'ram_addr_t'. This
assignment w

hw/core/machine: diagnose wrapping of maxmem

The 'maxmem' parameter parsed on the command line is held in uint64_t
and then assigned to the MachineState field that is 'ram_addr_t'. This
assignment will wrap on 32-bit hosts, silently changing the user's
config request if it were over-sized.

Improve the existing diagnositics for validating 'size', and add the
same diagnostics for 'maxmem'

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Tested-by: Ani Sinha <anisinha@redhat.com>
Reviewed-by: Ani Sinha <anisinha@redhat.com>
Message-ID: <20241127114057.255995-1-berrange@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

show more ...

Merge tag 'hw-misc-20241105' of https://github.com/philmd/qemu into staging

Misc HW patch queue

- Deprecate a pair of untested microblaze big-endian machines (Philippe)
- Arch-agnostic CPU topology

Merge tag 'hw-misc-20241105' of https://github.com/philmd/qemu into staging

Misc HW patch queue

- Deprecate a pair of untested microblaze big-endian machines (Philippe)
- Arch-agnostic CPU topology checks at machine level (Zhao)
- Cleanups on PPC E500 (Bernhard)
- Various conversions to DEFINE_TYPES() macro (Bernhard)
- Fix RISC-V _pext_u64() name clashing (Pierrick)

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# gpg: Signature made Tue 05 Nov 2024 23:32:55 GMT
# gpg: using RSA key FAABE75E12917221DCFD6BB2E3E32C2CDEADC0DE
# gpg: Good signature from "Philippe Mathieu-Daudé (F4BUG) <f4bug@amsat.org>" [full]
# Primary key fingerprint: FAAB E75E 1291 7221 DCFD 6BB2 E3E3 2C2C DEAD C0DE

* tag 'hw-misc-20241105' of https://github.com/philmd/qemu: (29 commits)
hw/riscv/iommu: fix build error with clang
hw/usb/hcd-ehci-sysbus: Prefer DEFINE_TYPES() macro
hw/rtc/ds1338: Prefer DEFINE_TYPES() macro
hw/i2c/smbus_eeprom: Prefer DEFINE_TYPES() macro
hw/block/pflash_cfi01: Prefer DEFINE_TYPES() macro
hw/sd/sdhci: Prefer DEFINE_TYPES() macro
hw/ppc/mpc8544_guts: Prefer DEFINE_TYPES() macro
hw/gpio/mpc8xxx: Prefer DEFINE_TYPES() macro
hw/net/fsl_etsec/etsec: Prefer DEFINE_TYPES() macro
hw/net/fsl_etsec/miim: Reuse MII constants
hw/pci-host/ppce500: Prefer DEFINE_TYPES() macro
hw/pci-host/ppce500: Reuse TYPE_PPC_E500_PCI_BRIDGE define
hw/i2c/mpc_i2c: Prefer DEFINE_TYPES() macro
hw/i2c/mpc_i2c: Convert DPRINTF to trace events for register access
hw/ppc/mpc8544_guts: Populate POR PLL ratio status register
hw/ppc/e500: Add missing device tree properties to i2c controller node
hw/ppc/e500: Remove unused "irqs" parameter
hw/ppc/e500: Prefer QOM cast
hw/core: Add a helper to check the cache topology level
hw/core: Check smp cache topology support for machine
...

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

show more ...

qapi/qom: Define cache enumeration and properties for machine

The x86 and ARM need to allow user to configure cache properties
(current only topology):
* For x86, the default cache topology model (

qapi/qom: Define cache enumeration and properties for machine

The x86 and ARM need to allow user to configure cache properties
(current only topology):
* For x86, the default cache topology model (of max/host CPU) does not
always match the Host's real physical cache topology. Performance can
increase when the configured virtual topology is closer to the
physical topology than a default topology would be.
* For ARM, QEMU can't get the cache topology information from the CPU
registers, then user configuration is necessary. Additionally, the
cache information is also needed for MPAM emulation (for TCG) to
build the right PPTT.

Define smp-cache related enumeration and properties in QAPI, so that
user could configure cache properties for SMP system through -machine in
the subsequent patch.

Cache enumeration (CacheLevelAndType) is implemented as the combination
of cache level (level 1/2/3) and cache type (data/instruction/unified).

Currently, separated L1 cache (L1 data cache and L1 instruction cache)
with unified higher-level cache (e.g., unified L2 and L3 caches), is the
most common cache architectures.

Therefore, enumerate the L1 D-cache, L1 I-cache, L2 cache and L3 cache
with smp-cache object to add the basic cache topology support. Other
kinds of caches (e.g., L1 unified or L2/L3 separated caches) can be
added directly into CacheLevelAndType if necessary.

Cache properties (SmpCacheProperties) currently only contains cache
topology information, and other cache properties can be added in it
if necessary.

Note, define cache topology based on CPU topology level with two
reasons:

1. In practice, a cache will always be bound to the CPU container
(either private in the CPU container or shared among multiple
containers), and CPU container is often expressed in terms of CPU
topology level.
2. The x86's cache-related CPUIDs encode cache topology based on APIC
ID's CPU topology layout. And the ACPI PPTT table that ARM/RISCV
relies on also requires CPU containers to help indicate the private
shared hierarchy of the cache. Therefore, for SMP systems, it is
natural to use the CPU topology hierarchy directly in QEMU to define
the cache topology.

With smp-cache QAPI support, add smp cache topology for machine by
parsing the smp-cache object list.

Also add the helper to access/update cache topology level of machine.

Suggested-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Tested-by: Yongwei Ma <yongwei.ma@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Message-ID: <20241101083331.340178-4-zhao1.liu@intel.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

show more ...

hw/core/machine: Add missing 'units.h' and 'error-report.h' headers

Include the missing "qemu/units.h" to fix when refactoring code:

../hw/core/machine.c:743:34: error: use of undeclared identifi

hw/core/machine: Add missing 'units.h' and 'error-report.h' headers

Include the missing "qemu/units.h" to fix when refactoring code:

../hw/core/machine.c:743:34: error: use of undeclared identifier 'MiB'
743 | mc->default_ram_size = 128 * MiB;
| ^
../hw/core/machine.c:750:44: error: use of undeclared identifier 'TiB'
750 | mc->smbios_memory_device_size = 2047 * TiB;
| ^

and "qemu/error-report.h" to fix:

../hw/core/machine.c:1029:13: error: call to undeclared function 'error_report' [-Wimplicit-function-declaration]
1029 | error_report("NUMA node %" PRIu16 " is missing, use "
| ^
../hw/core/machine.c:1240:9: error: call to undeclared function 'warn_report' [-Wimplicit-function-declaration]
1240 | warn_report("CPU model %s is deprecated -- %s",
| ^

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Message-Id: <20240930221900.59525-2-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

show more ...

Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

virtio,pc,pci: features, fixes, cleanups

CXL now can use Generic Port Affinity Structures.
CXL now allows c

Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

virtio,pc,pci: features, fixes, cleanups

CXL now can use Generic Port Affinity Structures.
CXL now allows control of link speed and width
vhost-user-blk now supports live resize, by means of
a new device-sync-config command
amd iommu now supports interrupt remapping
pcie devices now report extended tag field support
intel_iommu dropped support for Transient Mapping, to match VTD spec
arch agnostic ACPI infrastructure for vCPU Hotplug

Fixes, cleanups all over the place.

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

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# gpg: Signature made Mon 04 Nov 2024 21:03:33 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

* tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu: (65 commits)
intel_iommu: Add missed reserved bit check for IEC descriptor
intel_iommu: Add missed sanity check for 256-bit invalidation queue
intel_iommu: Send IQE event when setting reserved bit in IQT_TAIL
hw/acpi: Update GED with vCPU Hotplug VMSD for migration
tests/qtest/bios-tables-test: Update DSDT golden masters for x86/{pc,q35}
hw/acpi: Update ACPI `_STA` method with QOM vCPU ACPI Hotplug states
qtest: allow ACPI DSDT Table changes
hw/acpi: Make CPUs ACPI `presence` conditional during vCPU hot-unplug
hw/pci: Add parenthesis to PCI_BUILD_BDF macro
hw/cxl: Ensure there is enough data to read the input header in cmd_get_physical_port_state()
hw/cxl: Ensure there is enough data for the header in cmd_ccls_set_lsa()
hw/cxl: Check that writes do not go beyond end of target attributes
hw/cxl: Ensuring enough data to read parameters in cmd_tunnel_management_cmd()
hw/cxl: Avoid accesses beyond the end of cel_log.
hw/cxl: Check the length of data requested fits in get_log()
hw/cxl: Check enough data in cmd_firmware_update_transfer()
hw/cxl: Check input length is large enough in cmd_events_clear_records()
hw/cxl: Check input includes at least the header in cmd_features_set_feature()
hw/cxl: Check size of input data to dynamic capacity mailbox commands
hw/cxl/cxl-mailbox-util: Fix output buffer index update when retrieving DC extents
...

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

show more ...

Merge tag 'pull-ppc-for-9.2-1-20241104' of https://gitlab.com/npiggin/qemu into staging

* Various bug fixes
* Big cleanup of deprecated machines
* Power11 support for spapr
* XIVE improvements
* Goo

Merge tag 'pull-ppc-for-9.2-1-20241104' of https://gitlab.com/npiggin/qemu into staging

* Various bug fixes
* Big cleanup of deprecated machines
* Power11 support for spapr
* XIVE improvements
* Goodbye to Cedric and David as ppc reviewers, thank you both o7

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# gpg: Signature made Mon 04 Nov 2024 00:15:35 GMT
# gpg: using RSA key 4E437DDA56616F4329B0A79567B30276A8621CAE
# gpg: Good signature from "Nicholas Piggin <npiggin@gmail.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: 4E43 7DDA 5661 6F43 29B0 A795 67B3 0276 A862 1CAE

* tag 'pull-ppc-for-9.2-1-20241104' of https://gitlab.com/npiggin/qemu: (67 commits)
MAINTAINERS: Remove myself as reviewer
MAINTAINERS: Remove myself from XIVE
MAINTAINERS: Remove myself from the PowerNV machines
hw/ppc: Consolidate ppc440 initial mapping creation functions
hw/ppc: Consolidate e500 initial mapping creation functions
tests/qtest: Add XIVE tests for the powernv10 machine
pnv/xive2: TIMA CI ops using alternative offsets or byte lengths
pnv/xive2: TIMA support for 8-byte OS context push for PHYP
pnv/xive: Update PIPR when updating CPPR
pnv/xive: Add special handling for pool targets
ppc/xive2: Support "Pull Thread Context to Odd Thread Reporting Line"
ppc/xive2: Change context/ring specific functions to be generic
ppc/xive2: Support "Pull Thread Context to Register" operation
ppc/xive2: Allow 1-byte write of Target field in TIMA
ppc/xive2: Dump the VP-group and crowd tables with 'info pic'
ppc/xive2: Dump more NVP state with 'info pic'
pnv/xive2: Support for "OS LGS Push" TIMA operation
ppc/xive2: Support TIMA "Pull OS Context to Odd Thread Reporting Line"
pnv/xive2: Define OGEN field in the TIMA
pnv/xive: TIMA patch sets pre-req alignment and formatting changes
...

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

show more ...

pcie: enable Extended tag field support

>From what I read PCI has 32 transactions, PCI Express devices can handle
256 with Extended tag enabled (spec mentions also larger values but I
lack PCIe know

pcie: enable Extended tag field support

>From what I read PCI has 32 transactions, PCI Express devices can handle
256 with Extended tag enabled (spec mentions also larger values but I
lack PCIe knowledge).

QEMU leaves 'Extended tag field' with 0 as value:

Capabilities: [e0] Express (v1) Root Complex Integrated Endpoint, IntMsgNum 0
DevCap: MaxPayload 128 bytes, PhantFunc 0
ExtTag- RBE+ FLReset- TEE-IO-

SBSA ACS has test 824 which checks for PCIe device capabilities. BSA
specification [1] (SBSA is on top of BSA) in section F.3.2 lists
expected values for Device Capabilities Register:

Device Capabilities Register Requirement
Role based error reporting RCEC and RCiEP: Hardwired to 1
Endpoint L0s acceptable latency RCEC and RCiEP: Hardwired to 0
L1 acceptable latency RCEC and RCiEP: Hardwired to 0
Captured slot power limit scale RCEC and RCiEP: Hardwired to 0
Captured slot power limit value RCEC and RCiEP: Hardwired to 0
Max payload size value must be compliant with PCIe spec
Phantom functions RCEC and RCiEP: Recommendation is to
hardwire this bit to 0.
Extended tag field Hardwired to 1

1. https://developer.arm.com/documentation/den0094/c/

This change enables Extended tag field. All versioned platforms should
have it disabled for older versions (tested with Arm/virt).

Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
Message-Id: <20241023113820.486017-1-marcin.juszkiewicz@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

show more ...

ppc/spapr: remove deprecated machine pseries-2.3

Commit 1392617d3576 intended to tag pseries-2.1 - 2.11 machines as
deprecated with reasons mentioned in its commit log.
Removing pseries-2.3 specific

ppc/spapr: remove deprecated machine pseries-2.3

Commit 1392617d3576 intended to tag pseries-2.1 - 2.11 machines as
deprecated with reasons mentioned in its commit log.
Removing pseries-2.3 specific code with this patch for now.

While at it, also remove the dynamic-reconfiguration option which was
introduced to disable it by default for legacy machines until pseries-2.3.

Suggested-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

show more ...

ppc/spapr: remove deprecated machine pseries-2.2

Commit 1392617d3576 intended to tag pseries-2.1 - 2.11 machines as
deprecated with reasons mentioned in its commit log.
Removing pseries-2.2 specific

ppc/spapr: remove deprecated machine pseries-2.2

Commit 1392617d3576 intended to tag pseries-2.1 - 2.11 machines as
deprecated with reasons mentioned in its commit log.
Removing pseries-2.2 specific code with this patch for now.

Suggested-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

show more ...

ppc/spapr: remove deprecated machine pseries-2.1

Commit 1392617d3576 intended to tag pseries-2.1 - 2.11 machines as
deprecated with reasons mentioned in its commit log.
Removing pseries-2.1 specific

ppc/spapr: remove deprecated machine pseries-2.1

Commit 1392617d3576 intended to tag pseries-2.1 - 2.11 machines as
deprecated with reasons mentioned in its commit log.
Removing pseries-2.1 specific code with this patch for now.

Suggested-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

show more ...

Merge tag 'for-upstream-i386' of https://gitlab.com/bonzini/qemu into staging

* target/i386: new feature bits for AMD processors
* target/i386/tcg: improvements around flag handling
* target/i386: a

Merge tag 'for-upstream-i386' of https://gitlab.com/bonzini/qemu into staging

* target/i386: new feature bits for AMD processors
* target/i386/tcg: improvements around flag handling
* target/i386: add AVX10 support
* target/i386: add GraniteRapids-v2 model
* dockerfiles: add libcbor
* New nitro-enclave machine type
* qom: cleanups to object_new
* configure: detect 64-bit MIPS for rust
* configure: deprecate 32-bit MIPS

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# gpg: Signature made Thu 31 Oct 2024 17:28:36 GMT
# gpg: using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg: issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" [full]
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1
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* tag 'for-upstream-i386' of https://gitlab.com/bonzini/qemu: (49 commits)
target/i386: Introduce GraniteRapids-v2 model
target/i386: Add AVX512 state when AVX10 is supported
target/i386: Add feature dependencies for AVX10
target/i386: add CPUID.24 features for AVX10
target/i386: add AVX10 feature and AVX10 version property
target/i386: return bool from x86_cpu_filter_features
target/i386: do not rely on ExtSaveArea for accelerator-supported XCR0 bits
target/i386: cpu: set correct supported XCR0 features for TCG
target/i386: use + to put flags together
target/i386: use higher-precision arithmetic to compute CF
target/i386: use compiler builtin to compute PF
target/i386: make flag variables unsigned
target/i386: add a note about gen_jcc1
target/i386: add a few more trivial CCPrepare cases
target/i386: optimize TEST+Jxx sequences
target/i386: optimize computation of ZF from CC_OP_DYNAMIC
target/i386: Wrap cc_op_live with a validity check
target/i386: Introduce cc_op_size
target/i386: Rearrange CCOp
target/i386: remove CC_OP_CLR
...

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

show more ...

core/machine: Make create_default_memdev machine a virtual method

This is in preparation for the next commit where the nitro-enclave
machine type will need to instead use a memfd backend, for the bu

core/machine: Make create_default_memdev machine a virtual method

This is in preparation for the next commit where the nitro-enclave
machine type will need to instead use a memfd backend, for the built-in
vhost-user-vsock device to work.

Signed-off-by: Dorjoy Chowdhury <dorjoychy111@gmail.com>
Reviewed-by: Alexander Graf <graf@amazon.com>
Link: https://lore.kernel.org/r/20241008211727.49088-5-dorjoychy111@gmail.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

show more ...

Merge tag 'pull-target-arm-20240905' of https://git.linaro.org/people/pmaydell/qemu-arm into staging

target-arm queue:
* Implement FEAT_EBF16 emulation
* accel/tcg: Remove dead code from rr_cpu_th

Merge tag 'pull-target-arm-20240905' of https://git.linaro.org/people/pmaydell/qemu-arm into staging

target-arm queue:
* Implement FEAT_EBF16 emulation
* accel/tcg: Remove dead code from rr_cpu_thread_fn()
* hw: add compat machines for 9.2
* virt: default to two-stage SMMU from virt-9.2
* sbsa-ref: use two-stage SMMU
* hw: Various minor memory leak fixes
* target/arm: Correct names of VFP VFNMA and VFNMS insns
* hw/arm/xilinx_zynq: Enable Security Extensions
* hw/arm/boot: Report error msg if loading elf/dtb failed

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# gpg: Signature made Thu 05 Sep 2024 13:59:29 BST
# gpg: using RSA key E1A5C593CD419DE28E8315CF3C2525ED14360CDE
# gpg: issuer "peter.maydell@linaro.org"
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>" [ultimate]
# gpg: aka "Peter Maydell <pmaydell@gmail.com>" [ultimate]
# gpg: aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>" [ultimate]
# gpg: aka "Peter Maydell <peter@archaic.org.uk>" [ultimate]
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83 15CF 3C25 25ED 1436 0CDE

* tag 'pull-target-arm-20240905' of https://git.linaro.org/people/pmaydell/qemu-arm: (25 commits)
platform-bus: fix refcount leak
hw/arm/boot: Explain why load_elf_hdr() error is ignored
hw/arm/boot: Report error msg if loading elf/dtb failed
hw/arm/xilinx_zynq: Enable Security Extensions
target/arm: Correct names of VFP VFNMA and VFNMS insns
hw/arm/sbsa-ref: Don't leak string in sbsa_fdt_add_gic_node()
hm/nvram/xlnx-versal-efuse-ctrl: Call register_finalize_block
hw/misc/xlnx-versal-trng: Call register_finalize_block
hw/nvram/xlnx-zynqmp-efuse: Call register_finalize_block
hw/nvram/xlnx-bbram: Call register_finalize_block
hw/misc/xlnx-versal-trng: Free s->prng in finalize, not unrealize
hw/misc/xlnx-versal-cfu: destroy fifo in finalize
hw/arm/sbsa-ref: Use two-stage SMMU
hw/arm/virt: Default to two-stage SMMU from virt-9.2
hw/arm/smmuv3: Update comment documenting "stage" property
hw: add compat machines for 9.2
accel/tcg: Remove dead code from rr_cpu_thread_fn()
target/arm: Enable FEAT_EBF16 in the "max" CPU
target/arm: Implement FPCR.EBF=1 semantics for bfdotadd()
target/arm: Prepare bfdotadd() callers for FEAT_EBF support
...

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

show more ...

hw: add compat machines for 9.2

Add 9.2 machine types for arm/i440fx/m68k/q35/s390x/spapr.

Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Rev

hw: add compat machines for 9.2

Add 9.2 machine types for arm/i440fx/m68k/q35/s390x/spapr.

Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20240816161350.3706332-2-peter.maydell@linaro.org
Message-id: 20240816103723.2325982-1-cohuck@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

virtio,pci,pc: features,fixes

pci: Initial support for SPDM Responders
cxl: Add support for scan media, fea

Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

virtio,pci,pc: features,fixes

pci: Initial support for SPDM Responders
cxl: Add support for scan media, feature commands, device patrol scrub
control, DDR5 ECS control, firmware updates
virtio: in-order support
virtio-net: support for SR-IOV emulation (note: known issues on s390,
might get reverted if not fixed)
smbios: memory device size is now configurable per Machine
cpu: architecture agnostic code to support vCPU Hotplug

Fixes, cleanups all over the place.

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

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# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [undefined]
# gpg: aka "Michael S. Tsirkin <mst@redhat.com>" [undefined]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
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# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17 0970 C350 3912 AFBE 8E67
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* tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu: (61 commits)
hw/nvme: Add SPDM over DOE support
backends: Initial support for SPDM socket support
hw/pci: Add all Data Object Types defined in PCIe r6.0
tests/acpi: Add expected ACPI AML files for RISC-V
tests/qtest/bios-tables-test.c: Enable basic testing for RISC-V
tests/acpi: Add empty ACPI data files for RISC-V
tests/qtest/bios-tables-test.c: Remove the fall back path
tests/acpi: update expected DSDT blob for aarch64 and microvm
acpi/gpex: Create PCI link devices outside PCI root bridge
tests/acpi: Allow DSDT acpi table changes for aarch64
hw/riscv/virt-acpi-build.c: Update the HID of RISC-V UART
hw/riscv/virt-acpi-build.c: Add namespace devices for PLIC and APLIC
virtio-iommu: Add trace point on virtio_iommu_detach_endpoint_from_domain
hw/vfio/common: Add vfio_listener_region_del_iommu trace event
virtio-iommu: Remove the end point on detach
virtio-iommu: Free [host_]resv_ranges on unset_iommu_devices
virtio-iommu: Remove probe_done
Revert "virtio-iommu: Clear IOMMUDevice when VFIO device is unplugged"
gdbstub: Add helper function to unregister GDB register space
physmem: Add helper function to destroy CPU AddressSpace
...

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

show more ...

smbios: make memory device size configurable per Machine

Currently QEMU describes initial[1] RAM* in SMBIOS as a series of
virtual DIMMs (capped at 16Gb max) using type 17 structure entries.

Which

smbios: make memory device size configurable per Machine

Currently QEMU describes initial[1] RAM* in SMBIOS as a series of
virtual DIMMs (capped at 16Gb max) using type 17 structure entries.

Which is fine for the most cases. However when starting guest
with terabytes of RAM this leads to too many memory device
structures, which eventually upsets linux kernel as it reserves
only 64K for these entries and when that border is crossed out
it runs out of reserved memory.

Instead of partitioning initial RAM on 16Gb DIMMs, use maximum
possible chunk size that SMBIOS spec allows[2]. Which lets
encode RAM in lower 31 bits of 32bit field (which amounts upto
2047Tb per DIMM).
As result initial RAM will generate only one type 17 structure
until host/guest reach ability to use more RAM in the future.

Compat changes:
We can't unconditionally change chunk size as it will break
QEMU<->guest ABI (and migration). Thus introduce a new machine
class field that would let older versioned machines to use
legacy 16Gb chunks, while new(er) machine type[s] use maximum
possible chunk size.

PS:
While it might seem to be risky to rise max entry size this large
(much beyond of what current physical RAM modules support),
I'd not expect it causing much issues, modulo uncovering bugs
in software running within guest. And those should be fixed
on guest side to handle SMBIOS spec properly, especially if
guest is expected to support so huge RAM configs.

In worst case, QEMU can reduce chunk size later if we would
care enough about introducing a workaround for some 'unfixable'
guest OS, either by fixing up the next machine type or
giving users a CLI option to customize it.

1) Initial RAM - is RAM configured with help '-m SIZE' CLI option/
implicitly defined by machine. It doesn't include memory
configured with help of '-device' option[s] (pcdimm,nvdimm,...)
2) SMBIOS 3.1.0 7.18.5 Memory Device — Extended Size

PS:
* tested on 8Tb host with RHEL6 guest, which seems to parse
type 17 SMBIOS table entries correctly (according to 'dmidecode').

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20240715122417.4059293-1-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

show more ...

Merge tag 'pull-request-2024-07-22' of https://gitlab.com/thuth/qemu into staging

* Minor clean-ups and fixes for the qtests and Avocado tests
* Fix crash that happens when introspecting scsi-block

Merge tag 'pull-request-2024-07-22' of https://gitlab.com/thuth/qemu into staging

* Minor clean-ups and fixes for the qtests and Avocado tests
* Fix crash that happens when introspecting scsi-block on older machine types
* s390x: filter deprecated properties based on model expansion type

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# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full]
# gpg: aka "Thomas Huth <thuth@redhat.com>" [full]
# gpg: aka "Thomas Huth <th.huth@posteo.de>" [unknown]
# gpg: aka "Thomas Huth <huth@tuxfamily.org>" [full]

* tag 'pull-request-2024-07-22' of https://gitlab.com/thuth/qemu:
target/s390x: filter deprecated properties based on model expansion type
tests: increase timeout per instance of bios-tables-test
qtest/fuzz: make range overlap check more readable
hw: Fix crash that happens when introspecting scsi-block on older machine types
tests/avocado/machine_aspeed.py: Increase timeout for TPM test
tests/avocado: Remove the remainders of the virtiofs_submounts test
tests/avocado/mem-addr-space-check: Remove unused "import signal"
tests/avocado: Move LinuxTest related code into a separate file
tests/avocado: Allow overwriting AVOCADO_SHOW env variable
tests/avocado/boot_xen.py: use class attribute
tests/avocado/boot_xen.py: unify tags
tests/avocado/boot_xen.py: merge base classes

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

show more ...

hw: Fix crash that happens when introspecting scsi-block on older machine types

"make check SPEED=slow" is currently failing the device-introspect-test on
older machine types since introspecting "sc

hw: Fix crash that happens when introspecting scsi-block on older machine types

"make check SPEED=slow" is currently failing the device-introspect-test on
older machine types since introspecting "scsi-block" is causing an abort:

$ ./qemu-system-x86_64 -M pc-q35-8.0 -monitor stdio
QEMU 9.0.50 monitor - type 'help' for more information
(qemu) device_add scsi-block,help
Unexpected error in object_property_find_err() at
../../devel/qemu/qom/object.c:1357:
can't apply global scsi-disk-base.migrate-emulated-scsi-request=false:
Property 'scsi-block.migrate-emulated-scsi-request' not found
Aborted (core dumped)

The problem is that the compat code tries to change the
"migrate-emulated-scsi-request" property for all devices that are
derived from "scsi-block", but the property has only been added
to "scsi-hd" and "scsi-cd" via the DEFINE_SCSI_DISK_PROPERTIES macro.

Thus let's fix the problem by only changing the property on the devices
that really have this property.

Fixes: b4912afa5f ("scsi-disk: Fix crash for VM configured with USB CDROM after live migration")
Message-ID: <20240703090904.909720-1-thuth@redhat.com>
Acked-by: Hyman Huang <yong.huang@smartx.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

show more ...

Merge tag 'sdmmc-20240706' of https://github.com/philmd/qemu into staging

SD/MMC patches queue

- Use published card address (RCA) in qtest/npcm7xx_sdhci
- Have cards use random RCA
- Use SD spec v3

Merge tag 'sdmmc-20240706' of https://github.com/philmd/qemu into staging

SD/MMC patches queue

- Use published card address (RCA) in qtest/npcm7xx_sdhci
- Have cards use random RCA
- Use SD spec v3.01 by default
- Convert GEN_CMD to sd_generic_read/write_byte style
- Extract SDMMC_COMMON abstract QDev parent from SD_CARD
- Few housekeeping

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# gpg: Good signature from "Philippe Mathieu-Daudé (F4BUG) <f4bug@amsat.org>" [full]

* tag 'sdmmc-20240706' of https://github.com/philmd/qemu:
hw/sd/sdcard: Extract TYPE_SDMMC_COMMON from TYPE_SD_CARD
hw/sd/sdcard: Introduce set_csd/set_cid handlers
hw/sd/sdcard: Cover more SDCardStates
hw/sd/sdcard: Trace length of data read on DAT lines
hw/sd/sdcard: Remove default case in read/write on DAT lines
hw/sd/sdcard: Remove noise from sd_cmd_name()
hw/sd/sdcard: Remove noise from sd_acmd_name()
hw/sd/sdcard: Remove sd_none enum from sd_cmd_type_t
hw/sd/sdcard: Add sd_cmd_GEN_CMD handler (CMD56)
hw/sd/sdcard: Rename sd_cmd_SEND_OP_COND handler
hw/sd/sdcard: Use spec v3.01 by default
hw/sd/sdcard: Remove leftover comment about removed 'spi' Property
hw/sd/sdcard: Generate random RCA value
tests/qtest/npcm7xx_sdhci: Access the card using its published address
hw/sd/npcm7xx_sdhci: Use TYPE_SYSBUS_SDHCI definition
hw/sd/sdhci: Log non-sequencial access as GUEST_ERROR

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

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hw/sd/sdcard: Use spec v3.01 by default

Recent SDHCI expect cards to support the v3.01 spec
to negociate lower I/O voltage. Select it by default.

Versioned machine types with a version of 9.0 or
ea

hw/sd/sdcard: Use spec v3.01 by default

Recent SDHCI expect cards to support the v3.01 spec
to negociate lower I/O voltage. Select it by default.

Versioned machine types with a version of 9.0 or
earlier retain the old default (spec v2.00).

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Tested-by: Andrew Jeffery <andrew@codeconstruct.com.au>
Tested-by: Cédric Le Goater <clg@redhat.com>
Message-Id: <20240703134356.85972-2-philmd@linaro.org>

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Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

virtio: features,fixes

A bunch of improvements:
- vhost dirty log is now only scanned once, not once per de

Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

virtio: features,fixes

A bunch of improvements:
- vhost dirty log is now only scanned once, not once per device
- virtio and vhost now support VIRTIO_F_NOTIFICATION_DATA
- cxl gained DCD emulation support
- pvpanic gained shutdown support
- beginning of patchset for Generic Port Affinity Structure
- s3 support
- friendlier error messages when boot fails on some illegal configs
- for vhost-user, VHOST_USER_SET_LOG_BASE is now only sent once
- part of vhost-user support for any POSIX system -
not yet enabled due to qtest failures
- sr-iov VF setup code has been reworked significantly
- new tests, particularly for risc-v ACPI
- bugfixes

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

# -----BEGIN PGP SIGNATURE-----
#
# iQFDBAABCAAtFiEEXQn9CHHI+FuUyooNKB8NuNKNVGkFAmaF068PHG1zdEByZWRo
# YXQuY29tAAoJECgfDbjSjVRp+DMIAMC//mBXIZlPprfhb5cuZklxYi31Acgu5TUr
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# BXrt5yodrZYR2sR6svmOOIF3wPMUDKdlAItTcEgYyxaVo5rAdpc=
# =p9h4
# -----END PGP SIGNATURE-----
# gpg: Signature made Wed 03 Jul 2024 03:41:51 PM PDT
# gpg: using RSA key 5D09FD0871C8F85B94CA8A0D281F0DB8D28D5469
# gpg: issuer "mst@redhat.com"
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [undefined]
# gpg: aka "Michael S. Tsirkin <mst@redhat.com>" [undefined]
# 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: 0270 606B 6F3C DF3D 0B17 0970 C350 3912 AFBE 8E67
# Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA 8A0D 281F 0DB8 D28D 5469

* tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu: (85 commits)
hw/pci: Replace -1 with UINT32_MAX for romsize
pcie_sriov: Register VFs after migration
pcie_sriov: Remove num_vfs from PCIESriovPF
pcie_sriov: Release VFs failed to realize
pcie_sriov: Reuse SR-IOV VF device instances
pcie_sriov: Ensure VF function number does not overflow
pcie_sriov: Do not manually unrealize
hw/ppc/spapr_pci: Do not reject VFs created after a PF
hw/ppc/spapr_pci: Do not create DT for disabled PCI device
hw/pci: Rename has_power to enabled
virtio-iommu: Clear IOMMUDevice when VFIO device is unplugged
virtio: remove virtio_tswap16s() call in vring_packed_event_read()
hw/cxl/events: Mark cxl-add-dynamic-capacity and cxl-release-dynamic-capcity unstable
hw/cxl/events: Improve QMP interfaces and documentation for add/release dynamic capacity.
tests/data/acpi/rebuild-expected-aml.sh: Add RISC-V
pc-bios/meson.build: Add support for RISC-V in unpack_edk2_blobs
meson.build: Add RISC-V to the edk2-target list
tests/data/acpi/virt: Move ARM64 ACPI tables under aarch64/${machine} path
tests/data/acpi: Move x86 ACPI tables under x86/${machine} path
tests/qtest/bios-tables-test.c: Set "arch" for x86 tests
...

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

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virtio-pci: implement No_Soft_Reset bit

In current code, when guest does S3, virtio-gpu are reset due to the
bit No_Soft_Reset is not set. After resetting, the display resources
of virtio-gpu are de

virtio-pci: implement No_Soft_Reset bit

In current code, when guest does S3, virtio-gpu are reset due to the
bit No_Soft_Reset is not set. After resetting, the display resources
of virtio-gpu are destroyed, then the display can't come back and only
show blank after resuming.

Implement No_Soft_Reset bit of PCI_PM_CTRL register, then guest can check
this bit, if this bit is set, the devices resetting will not be done, and
then the display can work after resuming.

No_Soft_Reset bit is implemented for all virtio devices, and was tested
only on virtio-gpu device. Set it false by default for safety.

Signed-off-by: Jiqian Chen <Jiqian.Chen@amd.com>
Message-Id: <20240606102205.114671-3-Jiqian.Chen@amd.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

show more ...

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

* i386: fix issue with cache topology passthrough
* scsi-disk: migrate emulated requests
* i386/sev: fix Coverity issues
* i3

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

* i386: fix issue with cache topology passthrough
* scsi-disk: migrate emulated requests
* i386/sev: fix Coverity issues
* i386/tcg: more conversions to new decoder

# -----BEGIN PGP SIGNATURE-----
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# =m4BE
# -----END PGP SIGNATURE-----
# gpg: Signature made Mon 17 Jun 2024 12:48:19 AM PDT
# gpg: using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg: issuer "pbonzini@redhat.com"
# 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: (25 commits)
target/i386: SEV: do not assume machine->cgs is SEV
target/i386: convert CMPXCHG to new decoder
target/i386: convert XADD to new decoder
target/i386: convert LZCNT/TZCNT/BSF/BSR/POPCNT to new decoder
target/i386: convert SHLD/SHRD to new decoder
target/i386: adapt gen_shift_count for SHLD/SHRD
target/i386: pull load/writeback out of gen_shiftd_rm_T1
target/i386: convert non-grouped, helper-based 2-byte opcodes
target/i386: split X86_CHECK_prot into PE and VM86 checks
target/i386: finish converting 0F AE to the new decoder
target/i386: fix bad sorting of entries in the 0F table
target/i386: replace read_crN helper with read_cr8
target/i386: convert MOV from/to CR and DR to new decoder
target/i386: fix processing of intercept 0 (read CR0)
target/i386: replace NoSeg special with NoLoadEA
target/i386: change X86_ENTRYwr to use T0, use it for moves
target/i386: change X86_ENTRYr to use T0
target/i386: put BLS* input in T1, use generic flag writeback
target/i386: rewrite flags writeback for ADCX/ADOX
target/i386: remove CPUX86State argument from generator functions
...

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

show more ...

scsi-disk: Fix crash for VM configured with USB CDROM after live migration

For VMs configured with the USB CDROM device:

-drive file=/path/to/local/file,id=drive-usb-disk0,media=cdrom,readonly=on..

scsi-disk: Fix crash for VM configured with USB CDROM after live migration

For VMs configured with the USB CDROM device:

-drive file=/path/to/local/file,id=drive-usb-disk0,media=cdrom,readonly=on...
-device usb-storage,drive=drive-usb-disk0,id=usb-disk0...

QEMU process may crash after live migration, to reproduce the issue,
configure VM (Guest OS ubuntu 20.04 or 21.10) with the following XML:

<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/path/to/share_fs/cdrom.iso'/>
<target dev='sda' bus='usb'/>
<readonly/>
<address type='usb' bus='0' port='2'/>
</disk>
<controller type='usb' index='0' model='piix3-uhci'/>

Do the live migration repeatedly, crash may happen after live migratoin,
trace log at the source before live migration is as follows:

324808@1711972823.521945:usb_uhci_frame_start nr 319
324808@1711972823.521978:usb_uhci_qh_load qh 0x35cb5400
324808@1711972823.521989:usb_uhci_qh_load qh 0x35cb5480
324808@1711972823.521997:usb_uhci_td_load qh 0x35cb5480, td 0x35cbe000, ctrl 0x0, token 0xffe07f69
324808@1711972823.522010:usb_uhci_td_nextqh qh 0x35cb5480, td 0x35cbe000
324808@1711972823.522022:usb_uhci_qh_load qh 0x35cb5680
324808@1711972823.522030:usb_uhci_td_load qh 0x35cb5680, td 0x75ac5180, ctrl 0x19800000, token 0x3c903e1
324808@1711972823.522045:usb_uhci_packet_add token 0x103e1, td 0x75ac5180
324808@1711972823.522056:usb_packet_state_change bus 0, port 2, ep 2, packet 0x559f9ba14b00, state undef -> setup
324808@1711972823.522079:usb_msd_cmd_submit lun 0, tag 0x472, flags 0x00000080, len 10, data-len 8
324808@1711972823.522107:scsi_req_parsed target 0 lun 0 tag 1138 command 74 dir 1 length 8
324808@1711972823.522124:scsi_req_parsed_lba target 0 lun 0 tag 1138 command 74 lba 4096
324808@1711972823.522139:scsi_req_alloc target 0 lun 0 tag 1138
324808@1711972823.522169:scsi_req_continue target 0 lun 0 tag 1138
324808@1711972823.522181:scsi_req_data target 0 lun 0 tag 1138 len 8
324808@1711972823.522194:usb_packet_state_change bus 0, port 2, ep 2, packet 0x559f9ba14b00, state setup -> complete
324808@1711972823.522209:usb_uhci_packet_complete_success token 0x103e1, td 0x75ac5180
324808@1711972823.522219:usb_uhci_packet_del token 0x103e1, td 0x75ac5180
324808@1711972823.522232:usb_uhci_td_complete qh 0x35cb5680, td 0x75ac5180

trace log at the destination after live migration is as follows:

3286206@1711972823.951646:usb_uhci_frame_start nr 320
3286206@1711972823.951663:usb_uhci_qh_load qh 0x35cb5100
3286206@1711972823.951671:usb_uhci_qh_load qh 0x35cb5480
3286206@1711972823.951680:usb_uhci_td_load qh 0x35cb5480, td 0x35cbe000, ctrl 0x1000000, token 0xffe07f69
3286206@1711972823.951693:usb_uhci_td_nextqh qh 0x35cb5480, td 0x35cbe000
3286206@1711972823.951702:usb_uhci_qh_load qh 0x35cb5700
3286206@1711972823.951709:usb_uhci_td_load qh 0x35cb5700, td 0x75ac5240, ctrl 0x39800000, token 0xe08369
3286206@1711972823.951727:usb_uhci_queue_add token 0x8369
3286206@1711972823.951735:usb_uhci_packet_add token 0x8369, td 0x75ac5240
3286206@1711972823.951746:usb_packet_state_change bus 0, port 2, ep 1, packet 0x56066b2fb5a0, state undef -> setup
3286206@1711972823.951766:usb_msd_data_in 8/8 (scsi 8)
2024-04-01 12:00:24.665+0000: shutting down, reason=crashed

The backtrace reveals the following:

Program terminated with signal SIGSEGV, Segmentation fault.
0 __memmove_sse2_unaligned_erms () at ../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:312
312 movq -8(%rsi,%rdx), %rcx
[Current thread is 1 (Thread 0x7f0a9025fc00 (LWP 3286206))]
(gdb) bt
0 __memmove_sse2_unaligned_erms () at ../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:312
1 memcpy (__len=8, __src=<optimized out>, __dest=<optimized out>) at /usr/include/bits/string_fortified.h:34
2 iov_from_buf_full (iov=<optimized out>, iov_cnt=<optimized out>, offset=<optimized out>, buf=0x0, bytes=bytes@entry=8) at ../util/iov.c:33
3 iov_from_buf (bytes=8, buf=<optimized out>, offset=<optimized out>, iov_cnt=<optimized out>, iov=<optimized out>)
at /usr/src/debug/qemu-6-6.2.0-75.7.oe1.smartx.git.40.x86_64/include/qemu/iov.h:49
4 usb_packet_copy (p=p@entry=0x56066b2fb5a0, ptr=<optimized out>, bytes=bytes@entry=8) at ../hw/usb/core.c:636
5 usb_msd_copy_data (s=s@entry=0x56066c62c770, p=p@entry=0x56066b2fb5a0) at ../hw/usb/dev-storage.c:186
6 usb_msd_handle_data (dev=0x56066c62c770, p=0x56066b2fb5a0) at ../hw/usb/dev-storage.c:496
7 usb_handle_packet (dev=0x56066c62c770, p=p@entry=0x56066b2fb5a0) at ../hw/usb/core.c:455
8 uhci_handle_td (s=s@entry=0x56066bd5f210, q=0x56066bb7fbd0, q@entry=0x0, qh_addr=qh_addr@entry=902518530, td=td@entry=0x7fffe6e788f0, td_addr=<optimized out>,
int_mask=int_mask@entry=0x7fffe6e788e4) at ../hw/usb/hcd-uhci.c:885
9 uhci_process_frame (s=s@entry=0x56066bd5f210) at ../hw/usb/hcd-uhci.c:1061
10 uhci_frame_timer (opaque=opaque@entry=0x56066bd5f210) at ../hw/usb/hcd-uhci.c:1159
11 timerlist_run_timers (timer_list=0x56066af26bd0) at ../util/qemu-timer.c:642
12 qemu_clock_run_timers (type=QEMU_CLOCK_VIRTUAL) at ../util/qemu-timer.c:656
13 qemu_clock_run_all_timers () at ../util/qemu-timer.c:738
14 main_loop_wait (nonblocking=nonblocking@entry=0) at ../util/main-loop.c:542
15 qemu_main_loop () at ../softmmu/runstate.c:739
16 main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at ../softmmu/main.c:52
(gdb) frame 5
(gdb) p ((SCSIDiskReq *)s->req)->iov
$1 = {iov_base = 0x0, iov_len = 0}
(gdb) p/x s->req->tag
$2 = 0x472

When designing the USB mass storage device model, QEMU places SCSI disk
device as the backend of USB mass storage device. In addition, USB mass
device driver in Guest OS conforms to the "Universal Serial Bus Mass
Storage Class Bulk-Only Transport" specification in order to simulate
the transform behavior between a USB controller and a USB mass device.
The following shows the protocol hierarchy:

+----------------+
CDROM driver | scsi command | CDROM
+----------------+

+-----------------------+
USB mass | USB Mass Storage Class| USB mass
storage driver | Bulk-Only Transport | storage device
+-----------------------+

+----------------+
USB Controller | USB Protocol | USB device
+----------------+

In the USB protocol layer, between the USB controller and USB device, at
least two USB packets will be transformed when guest OS send a
read operation to USB mass storage device:

1. The CBW packet, which will be delivered to the USB device's Bulk-Out
endpoint. In order to simulate a read operation, the USB mass storage
device parses the CBW and converts it to a SCSI command, which would be
executed by CDROM(represented as SCSI disk in QEMU internally), and store
the result data of the SCSI command in a buffer.

2. The DATA-IN packet, which will be delivered from the USB device's
Bulk-In endpoint(fetched directly from the preceding buffer) to the USB
controller.

We consider UHCI to be the controller. The two packets mentioned above may
have been processed by UHCI in two separate frame entries of the Frame List
, and also described by two different TDs. Unlike the physical environment,
a virtualized environment requires the QEMU to make sure that the result
data of CBW is not lost and is delivered to the UHCI controller.

Currently, these types of SCSI requests are not migrated, so QEMU cannot
ensure the result data of the IO operation is not lost if there are
inflight emulated SCSI requests during the live migration.

Assume for the moment that the USB mass storage device is processing the
CBW and storing the result data of the read operation to a buffre, live
migration happens and moves the VM to the destination while not migrating
the result data of the read operation.

After migration, when UHCI at the destination issues a DATA-IN request to
the USB mass storage device, a crash happens because USB mass storage device
fetches the result data and get nothing.

The scenario this patch addresses is this one.

Theoretically, any device that uses the SCSI disk as a back-end would be
affected by this issue. In this case, it is the USB CDROM.

To fix it, inflight emulated SCSI request be migrated during live migration,
similar to the DMA SCSI request.

Signed-off-by: Hyman Huang <yong.huang@smartx.com>
Message-ID: <878c8f093f3fc2f584b5c31cb2490d9f6a12131a.1716531409.git.yong.huang@smartx.com>
[Do not bump migration version, introduce compat property instead. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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