Commit Graph

97628 Commits

Author SHA1 Message Date
Daniel P. Berrangé
998f334722 gitlab: show testlog.txt contents when cirrus/custom-runner jobs fail
When tests fail meson just displays a summary and tells you to look at
the testlog.txt file for details. The native jobs on shared runners
publish testlog.txt as an artifact. For the Cirrus jobs and custom
runner jobs this is not currently possible. The best we can do is cat
the log contents on failure, to give maintainers a fighting chance
of diagnosing the problem.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20220722130431.2319019-3-berrange@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20220725140520.515340-3-alex.bennee@linaro.org>
2022-07-29 09:48:01 +01:00
Daniel P. Berrangé
feb6cb9369 tests: refresh to latest libvirt-ci module
Notable changes:

  - libvirt-ci source tree was re-arranged, so the script we
    run now lives in a bin/ sub-dir

  - opensuse 15.2 is replaced by opensuse 15.3

  - libslirp is temporarily dropped on opensuse as the
    libslirp-version.h is broken

     https://bugzilla.opensuse.org/show_bug.cgi?id=1201551

  - The incorrectly named python3-virtualenv module was
    changed to python3-venv, but most distros don't need
    any package as 'venv' is a standard part of python

  - glibc-static was renamed to libc-static, to reflect
    fact that it isn't going to be glibc on all distros

  - The cmocka/json-c deps that were manually added to
    the centos dockerfile and are now consistently added
    to all targets

Acked-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20220722130431.2319019-2-berrange@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220725140520.515340-2-alex.bennee@linaro.org>
2022-07-29 09:48:01 +01:00
Richard Henderson
cc42559ab1 ppc patch queue for 2022-07-28:
Short queue with 2 Coverity fixes and one fix of the
 'wait' insns that is causing hangs if the guest kernel uses
 the most up to date wait opcode.
 
 - target/ppc:
   - implement new wait variants to fix guest hang when using the new opcode
 - ppc440_uc: initialize length passed to cpu_physical_memory_map()
 - spapr_nvdimm: check if spapr_drc_index() returns NULL
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Merge tag 'pull-ppc-20220728' of https://gitlab.com/danielhb/qemu into staging

ppc patch queue for 2022-07-28:

Short queue with 2 Coverity fixes and one fix of the
'wait' insns that is causing hangs if the guest kernel uses
the most up to date wait opcode.

- target/ppc:
  - implement new wait variants to fix guest hang when using the new opcode
- ppc440_uc: initialize length passed to cpu_physical_memory_map()
- spapr_nvdimm: check if spapr_drc_index() returns NULL

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# gpg: Signature made Thu 28 Jul 2022 09:41:58 AM PDT
# gpg:                using EDDSA key 17EBFF9923D01800AF2838193CD9CA96DE033164
# gpg: Good signature from "Daniel Henrique Barboza <danielhb413@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: 17EB FF99 23D0 1800 AF28  3819 3CD9 CA96 DE03 3164

* tag 'pull-ppc-20220728' of https://gitlab.com/danielhb/qemu:
  target/ppc: Implement new wait variants
  hw/ppc/ppc440_uc: Initialize length passed to cpu_physical_memory_map()
  hw/ppc: check if spapr_drc_index() returns NULL in spapr_nvdimm.c

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-07-28 15:06:42 -07:00
Nicholas Piggin
0c9717ff35 target/ppc: Implement new wait variants
ISA v2.06 adds new variations of wait, specified by the WC field. These
are not all compatible with the prior wait implementation, because they
add additional conditions that cause the processor to resume, which can
cause software to hang or run very slowly.

At this moment, with the current wait implementation and a pseries guest
using mainline kernel with new wait upcodes [1], QEMU hangs during boot if
more than one CPU is present:

 qemu-system-ppc64 -M pseries,x-vof=on -cpu POWER10 -smp 2 -nographic
-kernel zImage.pseries -no-reboot

QEMU will exit (as there's no filesystem) if the test "passes", or hang
during boot if it hits the bug.

ISA v3.0 changed the wait opcode and removed the new variants (retaining
the WC field but making non-zero values reserved).

ISA v3.1 added new WC values to the new wait opcode, and added a PL
field.

This patch implements the new wait encoding and supports WC variants
with no-op implementations, which provides basic correctness as
explained in comments.

[1] https://lore.kernel.org/all/20220720132132.903462-1-npiggin@gmail.com/

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Víctor Colombo <victor.colombo@eldorado.org.br>
Tested-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220720133352.904263-1-npiggin@gmail.com>
[danielhb: added information about the bug being fixed]
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
2022-07-28 13:30:41 -03:00
Peter Maydell
eda3f17bcd hw/ppc/ppc440_uc: Initialize length passed to cpu_physical_memory_map()
In dcr_write_dma(), there is code that uses cpu_physical_memory_map()
to implement a DMA transfer.  That function takes a 'plen' argument,
which points to a hwaddr which is used for both input and output: the
caller must set it to the size of the range it wants to map, and on
return it is updated to the actual length mapped. The dcr_write_dma()
code fails to initialize rlen and wlen, so will end up mapping an
unpredictable amount of memory.

Initialize the length values correctly, and check that we managed to
map the entire range before using the fast-path memmove().

This was spotted by Coverity, which points out that we never
initialized the variables before using them.

Fixes: Coverity CID 1487137, 1487150
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220726182341.1888115-2-peter.maydell@linaro.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
2022-07-28 10:31:54 -03:00
Daniel Henrique Barboza
edccf661e6 hw/ppc: check if spapr_drc_index() returns NULL in spapr_nvdimm.c
spapr_nvdimm_flush_completion_cb() and flush_worker_cb() are using the
DRC object returned by spapr_drc_index() without checking it for NULL.
In this case we would be dereferencing a NULL pointer when doing
SPAPR_NVDIMM(drc->dev) and PC_DIMM(drc->dev).

This can happen if, during a scm_flush(), the DRC object is wrongly
freed/released (e.g. a bug in another part of the code).
spapr_drc_index() would then return NULL in the callbacks.

Fixes: Coverity CID 1487108, 1487178
Reviewed-by: Greg Kurz <groug@kaod.org>
Message-Id: <20220409200856.283076-2-danielhb413@gmail.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
2022-07-28 10:31:54 -03:00
Richard Henderson
a17001c423 Sixth RISC-V PR for QEMU 7.1
This is a PR to go in for RC1. It fixes a segfault that occurs
 when using multiple sockets on the RISC-V virt board. It also
 includes a small fix to allow both Zmmul and M extensions.
 
 * Allow both Zmmul and M extension
 * Fix multi-socket plic configuraiton
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Merge tag 'pull-riscv-to-apply-20220728' of github.com:alistair23/qemu into staging

Sixth RISC-V PR for QEMU 7.1

This is a PR to go in for RC1. It fixes a segfault that occurs
when using multiple sockets on the RISC-V virt board. It also
includes a small fix to allow both Zmmul and M extensions.

* Allow both Zmmul and M extension
* Fix multi-socket plic configuraiton

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* tag 'pull-riscv-to-apply-20220728' of github.com:alistair23/qemu:
  hw/intc: sifive_plic: Fix multi-socket plic configuraiton
  RISC-V: Allow both Zmmul and M

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-07-28 04:40:26 -07:00
Richard Henderson
3e4abe2c92 Block: fix parallels block driver
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Merge tag 'pull-block-2022-07-27' of https://gitlab.com/vsementsov/qemu into staging

Block: fix parallels block driver

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# gpg: Signature made Wed 27 Jul 2022 12:00:23 PM PDT
# gpg:                using RSA key 8B9C26CDB2FD147C880E86A1561F24C1F19F79FB
# gpg: Good signature from "Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>" [unknown]
# gpg:                 aka "Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>" [unknown]
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# Primary key fingerprint: 8B9C 26CD B2FD 147C 880E  86A1 561F 24C1 F19F 79FB

* tag 'pull-block-2022-07-27' of https://gitlab.com/vsementsov/qemu:
  iotests/131: Add parallels regression test
  block/parallels: Fix buffer-based write call

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-07-27 20:10:15 -07:00
Atish Patra
54f2183630 hw/intc: sifive_plic: Fix multi-socket plic configuraiton
Since commit 40244040a7, multi-socket configuration with plic is
broken as the hartid for second socket is calculated incorrectly.
The hartid stored in addr_config already includes the offset
for the base hartid for that socket. Adding it again would lead
to segfault while creating the plic device for the virt machine.
qdev_connect_gpio_out was also invoked with incorrect number of gpio
lines.

Fixes: 40244040a7 (hw/intc: sifive_plic: Avoid overflowing the addr_config buffer)

Signed-off-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220723090335.671105-1-atishp@rivosinc.com>
[ Changes by AF:
 - Change the qdev_connect_gpio_out() numbering
]
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2022-07-28 09:08:44 +10:00
Palmer Dabbelt
44602af858 RISC-V: Allow both Zmmul and M
We got to talking about how Zmmul and M interact with each other
https://github.com/riscv/riscv-isa-manual/issues/869 , and it turns out
that QEMU's behavior is slightly wrong: having Zmmul and M is a legal
combination, it just means that the multiplication instructions are
supported even when M is disabled at runtime via misa.

This just stops overriding M from Zmmul, with that the other checks for
the multiplication instructions work as per the ISA.

Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220714180033.22385-1-palmer@rivosinc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2022-07-27 17:34:02 +10:00
Richard Henderson
7b17a1a841 Update version for v7.1.0-rc0 release
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-07-26 18:03:16 -07:00
Richard Henderson
e5b6555fb8 pc,virtio: fixes
Several fixes. From now on, regression fixes only.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_upstream' of git://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

pc,virtio: fixes

Several fixes. From now on, regression fixes only.

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

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# gpg: WARNING: This key is not certified with a trusted signature!
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#      Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA  8A0D 281F 0DB8 D28D 5469

* tag 'for_upstream' of git://git.kernel.org/pub/scm/virt/kvm/mst/qemu:
  hw/virtio/virtio-iommu: Enforce power-of-two notify for both MAP and UNMAP
  i386/pc: restrict AMD only enforcing of 1Tb hole to new machine type
  i386/pc: relocate 4g start to 1T where applicable
  i386/pc: bounds check phys-bits against max used GPA
  i386/pc: factor out device_memory base/size to helper
  i386/pc: handle unitialized mr in pc_get_cxl_range_end()
  i386/pc: factor out cxl range start to helper
  i386/pc: factor out cxl range end to helper
  i386/pc: factor out above-4g end to an helper
  i386/pc: pass pci_hole64_size to pc_memory_init()
  i386/pc: create pci-host qdev prior to pc_memory_init()
  hw/i386: add 4g boundary start to X86MachineState
  hw/cxl: Fix size of constant in interleave granularity function.
  hw/i386/pc: Always place CXL Memory Regions after device_memory
  hw/machine: Clear out left over CXL related pointer from move of state handling to machines.
  acpi/nvdimm: Define trace events for NVDIMM and substitute nvdimm_debug()

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-07-26 12:57:20 -07:00
Jean-Philippe Brucker
0522be9a0c hw/virtio/virtio-iommu: Enforce power-of-two notify for both MAP and UNMAP
Currently we only enforce power-of-two mappings (required by the QEMU
notifier) for UNMAP requests. A MAP request not aligned on a
power-of-two may be successfully handled by VFIO, and then the
corresponding UNMAP notify will fail because it will attempt to split
that mapping. Ensure MAP and UNMAP notifications are consistent.

Fixes: dde3f08b5c ("virtio-iommu: Handle non power of 2 range invalidations")
Reported-by: Tina Zhang <tina.zhang@intel.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Message-Id: <20220718135636.338264-1-jean-philippe@linaro.org>
Tested-by: Tina Zhang <tina.zhang@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-07-26 15:33:29 -04:00
Hanna Reitz
0c2cb3827e iotests/131: Add parallels regression test
Test an allocating write to a parallels image that has a backing node.
Before HEAD^, doing so used to give me a failed assertion (when the
backing node contains only `42` bytes; the results varies with the value
chosen, for `0` bytes, for example, all I get is EIO).

Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Reviewed-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Message-Id: <20220714132801.72464-3-hreitz@redhat.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
2022-07-26 22:05:20 +03:00
Hanna Reitz
eba088f91d block/parallels: Fix buffer-based write call
Commit a4072543cc has changed the I/O here
from working on a local one-element I/O vector to just using the buffer
directly (using the bdrv_co_pread()/bdrv_co_pwrite() helper functions
introduced shortly before).

However, it only changed the bdrv_co_preadv() call to bdrv_co_pread() -
the subsequent bdrv_co_pwritev() call stayed this way, and so still
expects a QEMUIOVector pointer instead of a plain buffer.  We must
change that to be a bdrv_co_pwrite() call.

Fixes: a4072543cc ("block/parallels: use buffer-based io")
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Reviewed-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Message-Id: <20220714132801.72464-2-hreitz@redhat.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
2022-07-26 22:04:59 +03:00
Richard Henderson
f6cce6bcb2 target-arm queue:
* Update Coverity component definitions
  * target/arm: Add MO_128 entry to pred_esz_masks[]
  * configure: Fix portability issues
  * hw/display/bcm2835_fb: Fix framebuffer allocation address
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Merge tag 'pull-target-arm-20220726' of https://git.linaro.org/people/pmaydell/qemu-arm into staging

target-arm queue:
 * Update Coverity component definitions
 * target/arm: Add MO_128 entry to pred_esz_masks[]
 * configure: Fix portability issues
 * hw/display/bcm2835_fb: Fix framebuffer allocation address

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# gpg: Signature made Tue 26 Jul 2022 08:19:21 AM PDT
# gpg:                using RSA key E1A5C593CD419DE28E8315CF3C2525ED14360CDE
# gpg:                issuer "peter.maydell@linaro.org"
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>" [full]
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>" [full]
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>" [full]

* tag 'pull-target-arm-20220726' of https://git.linaro.org/people/pmaydell/qemu-arm:
  hw/display/bcm2835_fb: Fix framebuffer allocation address
  configure: Avoid '==' bashism
  configure: Drop dead code attempting to use -msmall-data on alpha hosts
  configure: Don't use bash-specific string-replacement syntax
  configure: Add braces to clarify intent of $emu[[:space:]]
  configure: Add missing POSIX-required space
  target/arm: Add MO_128 entry to pred_esz_masks[]
  scripts/coverity-scan/COMPONENTS.md: Update slirp component info
  scripts/coverity-scan/COMPONENTS.md: Add loongarch component

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-07-26 08:32:01 -07:00
Joao Martins
b3e6982b41 i386/pc: restrict AMD only enforcing of 1Tb hole to new machine type
The added enforcing is only relevant in the case of AMD where the
range right before the 1TB is restricted and cannot be DMA mapped
by the kernel consequently leading to IOMMU INVALID_DEVICE_REQUEST
or possibly other kinds of IOMMU events in the AMD IOMMU.

Although, there's a case where it may make sense to disable the
IOVA relocation/validation when migrating from a
non-amd-1tb-aware qemu to one that supports it.

Relocating RAM regions to after the 1Tb hole has consequences for
guest ABI because we are changing the memory mapping, so make
sure that only new machine enforce but not older ones.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Acked-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20220719170014.27028-12-joao.m.martins@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-07-26 10:40:58 -04:00
Joao Martins
8504f12945 i386/pc: relocate 4g start to 1T where applicable
It is assumed that the whole GPA space is available to be DMA
addressable, within a given address space limit, except for a
tiny region before the 4G. Since Linux v5.4, VFIO validates
whether the selected GPA is indeed valid i.e. not reserved by
IOMMU on behalf of some specific devices or platform-defined
restrictions, and thus failing the ioctl(VFIO_DMA_MAP) with
 -EINVAL.

AMD systems with an IOMMU are examples of such platforms and
particularly may only have these ranges as allowed:

        0000000000000000 - 00000000fedfffff (0      .. 3.982G)
        00000000fef00000 - 000000fcffffffff (3.983G .. 1011.9G)
        0000010000000000 - ffffffffffffffff (1Tb    .. 16Pb[*])

We already account for the 4G hole, albeit if the guest is big
enough we will fail to allocate a guest with  >1010G due to the
~12G hole at the 1Tb boundary, reserved for HyperTransport (HT).

[*] there is another reserved region unrelated to HT that exists
in the 256T boundary in Fam 17h according to Errata #1286,
documeted also in "Open-Source Register Reference for AMD Family
17h Processors (PUB)"

When creating the region above 4G, take into account that on AMD
platforms the HyperTransport range is reserved and hence it
cannot be used either as GPAs. On those cases rather than
establishing the start of ram-above-4g to be 4G, relocate instead
to 1Tb. See AMD IOMMU spec, section 2.1.2 "IOMMU Logical
Topology", for more information on the underlying restriction of
IOVAs.

After accounting for the 1Tb hole on AMD hosts, mtree should
look like:

0000000000000000-000000007fffffff (prio 0, i/o):
         alias ram-below-4g @pc.ram 0000000000000000-000000007fffffff
0000010000000000-000001ff7fffffff (prio 0, i/o):
        alias ram-above-4g @pc.ram 0000000080000000-000000ffffffffff

If the relocation is done or the address space covers it, we
also add the the reserved HT e820 range as reserved.

Default phys-bits on Qemu is TCG_PHYS_ADDR_BITS (40) which is enough
to address 1Tb (0xff ffff ffff). On AMD platforms, if a
ram-above-4g relocation is attempted and the CPU wasn't configured
with a big enough phys-bits, an error message will be printed
due to the maxphysaddr vs maxusedaddr check previously added.

Suggested-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Acked-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20220719170014.27028-11-joao.m.martins@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-07-26 10:40:58 -04:00
Joao Martins
1caab5cf86 i386/pc: bounds check phys-bits against max used GPA
Calculate max *used* GPA against the CPU maximum possible address
and error out if the former surprasses the latter. This ensures
max used GPA is reacheable by configured phys-bits. Default phys-bits
on Qemu is TCG_PHYS_ADDR_BITS (40) which is enough for the CPU to
address 1Tb (0xff ffff ffff) or 1010G (0xfc ffff ffff) in AMD hosts
with IOMMU.

This is preparation for AMD guests with >1010G, where it will want relocate
ram-above-4g to be after 1Tb instead of 4G.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Acked-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20220719170014.27028-10-joao.m.martins@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-07-26 10:40:58 -04:00
Joao Martins
8288a8286d i386/pc: factor out device_memory base/size to helper
Move obtaining hole64_start from device_memory memory region base/size
into an helper alongside correspondent getters in pc_memory_init() when
the hotplug range is unitialized. While doing that remove the memory
region based logic from this newly added helper.

This is the final step that allows pc_pci_hole64_start() to be callable
at the beginning of pc_memory_init() before any memory regions are
initialized.

Cc: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Acked-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20220719170014.27028-9-joao.m.martins@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-07-26 10:40:58 -04:00
Joao Martins
1065b21993 i386/pc: handle unitialized mr in pc_get_cxl_range_end()
Remove pc_get_cxl_range_end() dependency on the CXL memory region,
and replace with one that does not require the CXL host_mr to determine
the start of CXL start.

This in preparation to allow pc_pci_hole64_start() to be called early
in pc_memory_init(), handle CXL memory region end when its underlying
memory region isn't yet initialized.

Cc: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Message-Id: <20220719170014.27028-8-joao.m.martins@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Igor Mammedov <imammedo@redhat.com>
2022-07-26 10:40:58 -04:00
Joao Martins
42bed07127 i386/pc: factor out cxl range start to helper
Factor out the calculation of the base address of the memory region.
It will be used later on for the cxl range end counterpart calculation
and as well in pc_memory_init() CXL memory region initialization, thus
avoiding duplication.

Cc: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Acked-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20220719170014.27028-7-joao.m.martins@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-07-26 10:40:58 -04:00
Joao Martins
55668e409b i386/pc: factor out cxl range end to helper
Move calculation of CXL memory region end to separate helper.

This is in preparation to a future change that removes CXL range
dependency on the CXL memory region, with the goal of allowing
pc_pci_hole64_start() to be called before any memory region are
initialized.

Cc: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Acked-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20220719170014.27028-6-joao.m.martins@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-07-26 10:40:58 -04:00
Joao Martins
5ff62e2afe i386/pc: factor out above-4g end to an helper
There's a couple of places that seem to duplicate this calculation
of RAM size above the 4G boundary. Move all those to a helper function.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20220719170014.27028-5-joao.m.martins@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-07-26 10:40:58 -04:00
Joao Martins
c48eb7a4e8 i386/pc: pass pci_hole64_size to pc_memory_init()
Use the pre-initialized pci-host qdev and fetch the
pci-hole64-size into pc_memory_init() newly added argument.
Use PCI_HOST_PROP_PCI_HOLE64_SIZE pci-host property for
fetching pci-hole64-size.

This is in preparation to determine that host-phys-bits are
enough and for pci-hole64-size to be considered to relocate
ram-above-4g to be at 1T (on AMD platforms).

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20220719170014.27028-4-joao.m.martins@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-07-26 10:40:58 -04:00
Joao Martins
4876778749 i386/pc: create pci-host qdev prior to pc_memory_init()
At the start of pc_memory_init() we usually pass a range of
0..UINT64_MAX as pci_memory, when really its 2G (i440fx) or
32G (q35). To get the real user value, we need to get pci-host
passed property for default pci_hole64_size. Thus to get that,
create the qdev prior to memory init to better make estimations
on max used/phys addr.

This is in preparation to determine that host-phys-bits are
enough and also for pci-hole64-size to be considered to relocate
ram-above-4g to be at 1T (on AMD platforms).

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20220719170014.27028-3-joao.m.martins@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-07-26 10:40:58 -04:00
Joao Martins
4ab4c33014 hw/i386: add 4g boundary start to X86MachineState
Rather than hardcoding the 4G boundary everywhere, introduce a
X86MachineState field @above_4g_mem_start and use it
accordingly.

This is in preparation for relocating ram-above-4g to be
dynamically start at 1T on AMD platforms.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20220719170014.27028-2-joao.m.martins@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-07-26 10:40:58 -04:00
Jonathan Cameron
cb70b7e871 hw/cxl: Fix size of constant in interleave granularity function.
Whilst the interleave granularity is always small enough that this isn't
a real problem (much less than 4GiB) let's change the constant
to ULL to fix the coverity warning.

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Fixes: 829de299d1 ("hw/cxl/component: Add utils for interleave parameter encoding/decoding")
Fixes: Coverity CID 1488868
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Message-Id: <20220701132300.2264-4-Jonathan.Cameron@huawei.com>
Acked-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-07-26 10:40:58 -04:00
Jonathan Cameron
4a447a710c hw/i386/pc: Always place CXL Memory Regions after device_memory
Previously broken_reserved_end was taken into account, but Igor Mammedov
identified that this could lead to a clash between potential RAM being
mapped in the region and CXL usage. Hence always add the size of the
device_memory memory region.  This only affects the case where the
broken_reserved_end flag was set.

Fixes: 6e4e3ae936 ("hw/cxl/component: Implement host bridge MMIO (8.2.5, table 142)")
Reported-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Message-Id: <20220701132300.2264-3-Jonathan.Cameron@huawei.com>
Acked-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-07-26 10:40:58 -04:00
Jonathan Cameron
71a5f07e75 hw/machine: Clear out left over CXL related pointer from move of state handling to machines.
This got left behind in the move of the CXL setup code from core
files to the machines that support it.

Link: 1ebf9001fb
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Message-Id: <20220701132300.2264-2-Jonathan.Cameron@huawei.com>
Acked-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-07-26 10:40:58 -04:00
Robert Hoo
e4bcec0c3c acpi/nvdimm: Define trace events for NVDIMM and substitute nvdimm_debug()
Signed-off-by: Robert Hoo <robert.hu@linux.intel.com>
Reviewed-by: Jingqi Liu <jingqi.liu@intel.com>
Message-Id: <20220704085852.330005-1-robert.hu@linux.intel.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-07-26 10:37:46 -04:00
Alan Jian
5865d99fe8 hw/display/bcm2835_fb: Fix framebuffer allocation address
This patch fixes the dedicated framebuffer mailbox interface by
removing an unneeded offset.  This means that we pick the framebuffer
address in the same way that we do if the guest code uses the buffer
allocate mechanism of the bcm2835_property interface (case
0x00040001: /* Allocate buffer */ in bcm2835_property.c).

The documentation of this mailbox interface doesn't say anything
about using parts of the request buffer address to affect the
chosen framebuffer address:
https://github.com/raspberrypi/firmware/wiki/Mailbox-framebuffer-interface

Some baremetal applications like the Screen01/Screen02 examples from
Baking Pi tutorial[1] didn't work before this patch.

[1] https://www.cl.cam.ac.uk/projects/raspberrypi/tutorials/os/screen01.html

Signed-off-by: Alan Jian <alanjian85@outlook.com>
Message-id: 20220725145838.8412-1-alanjian85@outlook.com
[PMM: tweaked commit message]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-07-26 14:09:44 +01:00
Peter Maydell
c5cfdabaf5 configure: Avoid '==' bashism
The '==' operator to test is a bashism; the standard way to copmare
strings is '='. This causes dash to complain:

../../configure: 681: test: linux: unexpected operator

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-id: 20220720152631.450903-6-peter.maydell@linaro.org
2022-07-26 13:42:04 +01:00
Peter Maydell
aca5001dab configure: Drop dead code attempting to use -msmall-data on alpha hosts
In commit 823eb01345 we moved the setting of ARCH from configure
to meson.build, but we accidentally left behind one attempt to use
$ARCH in configure, which was trying to add -msmall-data to the
compiler flags on Alpha hosts.  Since ARCH is now never set, the test
always fails and we never add the flag.

There isn't actually any need to use this compiler flag on Alpha:
the original intent was that it would allow us to simplify our TCG
codegen on that platform, but we never actually made the TCG changes
that would rely on -msmall-data.

Drop the effectively-dead code from configure, as we don't need it.

This was spotted by shellcheck:

In ./configure line 2254:
case "$ARCH" in
      ^---^ SC2153: Possible misspelling: ARCH may not be assigned, but arch is.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-id: 20220720152631.450903-5-peter.maydell@linaro.org
2022-07-26 13:42:04 +01:00
Peter Maydell
65842b03d1 configure: Don't use bash-specific string-replacement syntax
The variable string-replacement syntax ${var/old/new} is a bashism
(though it is also supported by some other shells), and for instance
does not work with the NetBSD /bin/sh, which complains:
 ../src/configure: 687: Syntax error: Bad substitution

Replace it with a more portable sed-based approach, similar to
what we already do in quote_sh().

Note that shellcheck also diagnoses this:

In ./configure line 687:
    e=${e/'\'/'\\'}
      ^-----------^ SC2039: In POSIX sh, string replacement is undefined.
           ^-- SC1003: Want to escape a single quote? echo 'This is how it'\''s done'.
                ^-- SC1003: Want to escape a single quote? echo 'This is how it'\''s done'.

In ./configure line 688:
    e=${e/\"/'\"'}
      ^----------^ SC2039: In POSIX sh, string replacement is undefined.

Fixes: 8154f5e64b ("meson: Prefix each element of firmware path")
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Thomas Huth <thuth@redhat.com>
Message-id: 20220720152631.450903-4-peter.maydell@linaro.org
2022-07-26 13:42:04 +01:00
Peter Maydell
d466d416ed configure: Add braces to clarify intent of $emu[[:space:]]
In shell script syntax, $var[something] is not special for variable
expansion: $var is expanded.  However, as it can look as if it were
intended to be an array element access (the correct syntax for which
is ${var[something]}), shellcheck recommends using explicit braces
around ${var} to clarify the intended expansion.

This fixes the warning:

In ./configure line 2346:
        if "$target_ld" -verbose 2>&1 | grep -q "^[[:space:]]*$emu[[:space:]]*$"; then
                                                              ^-- SC1087: Use braces when expanding arrays, e.g. ${array[idx]} (or ${var}[.. to quiet).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-id: 20220720152631.450903-3-peter.maydell@linaro.org
2022-07-26 13:40:44 +01:00
Peter Maydell
35a7a6fc56 configure: Add missing POSIX-required space
In commit 7d7dbf9dc1 we added a line to the configure script
which is not valid POSIX shell syntax, because it is missing a space
after a '!' character. shellcheck diagnoses this:

if !(GIT="$git" "$source_path/scripts/git-submodule.sh" "$git_submodules_action" "$git_submodules"); then
    ^-- SC1035: You are missing a required space after the !.

and the OpenBSD shell will not correctly handle this without the space.

Fixes: 7d7dbf9dc1 ("configure: replace --enable/disable-git-update with --with-git-submodules")
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Tested-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-id: 20220720152631.450903-2-peter.maydell@linaro.org
2022-07-26 13:40:44 +01:00
Peter Maydell
fca75f60ab target/arm: Add MO_128 entry to pred_esz_masks[]
In commit 7390e0e9ab, we added support for SME loads and stores.
Unlike SVE loads and stores, these include handling of 128-bit
elements.  The SME load/store functions call down into the existing
sve_cont_ldst_elements() function, which uses the element size MO_*
value as an index into the pred_esz_masks[] array.  Because this code
path now has to handle MO_128, we need to add an extra element to the
array.

This bug was spotted by Coverity because it meant we were reading off
the end of the array.

Resolves: Coverity CID 1490539, 1490541, 1490543, 1490544, 1490545,
 1490546, 1490548, 1490549, 1490550, 1490551, 1490555, 1490557,
 1490558, 1490560, 1490561, 1490563
Fixes: 7390e0e9ab ("target/arm: Implement SME LD1, ST1")
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220718100144.3248052-1-peter.maydell@linaro.org
2022-07-26 13:38:23 +01:00
Peter Maydell
02b7035d15 scripts/coverity-scan/COMPONENTS.md: Update slirp component info
Update the regex for the slirp component now that it lives
solely inside /slirp/, and note that it should be ignored in
Coverity analysis (because it's a separate upstream project
now, and they run Coverity on it themselves).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 20220718142310.16013-3-peter.maydell@linaro.org
2022-07-26 13:37:44 +01:00
Peter Maydell
32226db011 scripts/coverity-scan/COMPONENTS.md: Add loongarch component
Add the component regex for the new loongarch target.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 20220718142310.16013-2-peter.maydell@linaro.org
2022-07-26 13:37:44 +01:00
Peter Maydell
d1c912b816 linux-user pull request 20220726
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Merge tag 'linux-user-for-7.1-pull-request' of https://gitlab.com/laurent_vivier/qemu into staging

linux-user pull request 20220726

# gpg: Signature made Tue 26 Jul 2022 10:44:29 BST
# gpg:                using RSA key CD2F75DDC8E3A4DC2E4F5173F30C38BD3F2FBE3C
# gpg:                issuer "laurent@vivier.eu"
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full]
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>" [full]
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [full]
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* tag 'linux-user-for-7.1-pull-request' of https://gitlab.com/laurent_vivier/qemu:
  linux-user: Use target abi_int type for pipefd[1] in pipe()
  linux-user: Unconditionally use pipe2() syscall
  linux-user/hppa: Fix segfaults on page zero

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-07-26 13:29:26 +01:00
Peter Maydell
0d0275c31f -----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
 
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 =SpWG
 -----END PGP SIGNATURE-----

Merge tag 'net-pull-request' of https://github.com/jasowang/qemu into staging

# gpg: Signature made Tue 26 Jul 2022 09:47:24 BST
# gpg:                using RSA key EF04965B398D6211
# gpg: Good signature from "Jason Wang (Jason Wang on RedHat) <jasowang@redhat.com>" [marginal]
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 215D 46F4 8246 689E C77F  3562 EF04 965B 398D 6211

* tag 'net-pull-request' of https://github.com/jasowang/qemu:
  vdpa: Fix memory listener deletions of iova tree
  vhost: Get vring base from vq, not svq
  e1000e: Fix possible interrupt loss when using MSI

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-07-26 10:31:02 +01:00
Eugenio Pérez
75a8ce64f6 vdpa: Fix memory listener deletions of iova tree
vhost_vdpa_listener_region_del is always deleting the first iova entry
of the tree, since it's using the needle iova instead of the result's
one.

This was detected using a vga virtual device in the VM using vdpa SVQ.
It makes some extra memory adding and deleting, so the wrong one was
mapped / unmapped. This was undetected before since all the memory was
mappend and unmapped totally without that device, but other conditions
could trigger it too:

* mem_region was with .iova = 0, .translated_addr = (correct GPA).
* iova_tree_find_iova returned right result, but does not update
  mem_region.
* iova_tree_remove always removed region with .iova = 0. Right iova were
  sent to the device.
* Next map will fill the first region with .iova = 0, causing a mapping
  with the same iova and device complains, if the next action is a map.
* Next unmap will cause to try to unmap again iova = 0, causing the
  device to complain that no region was mapped at iova = 0.

Fixes: 34e3c94eda ("vdpa: Add custom IOTLB translations to SVQ")
Reported-by: Lei Yang <leiyang@redhat.com>
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
2022-07-26 16:24:19 +08:00
Eugenio Pérez
2fdac348fd vhost: Get vring base from vq, not svq
The SVQ vring used idx usually match with the guest visible one, as long
as all the guest buffers (GPA) maps to exactly one buffer within qemu's
VA. However, as we can see in virtqueue_map_desc, a single guest buffer
could map to many buffers in SVQ vring.

Also, its also a mistake to rewind them at the source of migration.
Since VirtQueue is able to migrate the inflight descriptors, its
responsability of the destination to perform the rewind just in case it
cannot report the inflight descriptors to the device.

This makes easier to migrate between backends or to recover them in
vhost devices that support set in flight descriptors.

Fixes: 6d0b222666 ("vdpa: Adapt vhost_vdpa_get_vring_base to SVQ")
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
2022-07-26 16:23:54 +08:00
Ake Koomsin
dd0ef12866 e1000e: Fix possible interrupt loss when using MSI
Commit "e1000e: Prevent MSI/MSI-X storms" introduced msi_causes_pending
to prevent interrupt storms problem. It was tested with MSI-X.

In case of MSI, the guest can rely solely on interrupts to clear ICR.
Upon clearing all pending interrupts, msi_causes_pending gets cleared.
However, when e1000e_itr_should_postpone() in e1000e_send_msi() returns
true, MSI never gets fired by e1000e_intrmgr_on_throttling_timer()
because msi_causes_pending is still set. This results in interrupt loss.

To prevent this, we need to clear msi_causes_pending when MSI is going
to get fired by the throttling timer. The guest can then receive
interrupts eventually.

Signed-off-by: Ake Koomsin <ake@igel.co.jp>
Signed-off-by: Jason Wang <jasowang@redhat.com>
2022-07-26 16:23:54 +08:00
Peter Maydell
616a6459d8 * Bug fixes
* Pass random seed to x86 and other FDT platforms
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Merge tag 'for-upstream2' of https://gitlab.com/bonzini/qemu into staging

* Bug fixes
* Pass random seed to x86 and other FDT platforms

# gpg: Signature made Fri 22 Jul 2022 18:26:45 BST
# 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
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* tag 'for-upstream2' of https://gitlab.com/bonzini/qemu:
  hw/i386: pass RNG seed via setup_data entry
  hw/rx: pass random seed to fdt
  hw/mips: boston: pass random seed to fdt
  hw/nios2: virt: pass random seed to fdt
  oss-fuzz: ensure base_copy is a generic-fuzzer
  oss-fuzz: remove binaries from qemu-bundle tree
  accel/kvm: Avoid Coverity warning in query_stats()
  docs: Add caveats for Windows as the build platform

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-07-25 13:49:41 +01:00
Helge Deller
6f200f5186 linux-user: Use target abi_int type for pipefd[1] in pipe()
When writing back the fd[1] pipe file handle to emulated userspace
memory, use sizeof(abi_int) as offset insted of the hosts's int type.
There is no functional change in this patch.

Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

Message-Id: <YtQ3Id6z8slpVr7r@p100>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-07-25 10:42:11 +02:00
Helge Deller
499d805537 linux-user: Unconditionally use pipe2() syscall
The pipe2() syscall is available on all Linux platforms since kernel
2.6.27, so use it unconditionally to emulate pipe() and pipe2().

Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <YtbZ2ojisTnzxN9Y@p100>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-07-25 10:42:11 +02:00
Helge Deller
bd4b7fd6ba linux-user/hppa: Fix segfaults on page zero
This program:

    int main(void) { asm("bv %r0(%r0)"); return 0; }

produces on real hppa hardware the expected segfault:

    SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x3} ---
    killed by SIGSEGV +++
    Segmentation fault

But when run on linux-user you get instead internal qemu errors:

ERROR: linux-user/hppa/cpu_loop.c:172:cpu_loop: code should not be reached
Bail out! ERROR: linux-user/hppa/cpu_loop.c:172:cpu_loop: code should not be reached
ERROR: accel/tcg/cpu-exec.c:933:cpu_exec: assertion failed: (cpu == current_cpu)
Bail out! ERROR: accel/tcg/cpu-exec.c:933:cpu_exec: assertion failed: (cpu == current_cpu)

Fix it by adding the missing case for the EXCP_IMP trap in
cpu_loop() and raise a segfault.

Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <YtWNC56seiV6VenA@p100>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-07-25 10:42:11 +02:00
Jason A. Donenfeld
67f7e426e5 hw/i386: pass RNG seed via setup_data entry
Tiny machines optimized for fast boot time generally don't use EFI,
which means a random seed has to be supplied some other way. For this
purpose, Linux (≥5.20) supports passing a seed in the setup_data table
with SETUP_RNG_SEED, specially intended for hypervisors, kexec, and
specialized bootloaders. The linked commit shows the upstream kernel
implementation.

At Paolo's request, we don't pass these to versioned machine types ≤7.0.

Link: https://git.kernel.org/tip/tip/c/68b8e9713c8
Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Eduardo Habkost <eduardo@habkost.net>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Philippe Mathieu-Daudé <f4bug@amsat.org>
Cc: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Message-Id: <20220721125636.446842-1-Jason@zx2c4.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-07-22 19:26:34 +02:00