Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-13-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
By shifting the 16-bit input left by 16, we can align the desired
portion of the 48-bit product and use tcg_gen_muls2_i32.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-12-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Since all of the inputs and outputs are i32, dispense with
the intermediate promotion to i64 and use tcg_gen_add2_i32.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-11-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-10-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-9-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Since all of the inputs and outputs are i32, dispense with
the intermediate promotion to i64 and use tcg_gen_mulu2_i32
and tcg_gen_add2_i32.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-8-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-7-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Convert the modified immediate form of the data processing insns.
For A32, we can finally remove any code that was intertwined with
the register and register-shifted-register forms.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-6-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Convert the register shifted by register form of the data
processing insns. For A32, we cannot yet remove any code
because the legacy decoder intertwines the immediate form.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-5-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Convert the register shifted by immediate form of the data
processing insns. For A32, we cannot yet remove any code
because the legacy decoder intertwines the reg-shifted-reg
and immediate forms.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-4-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Add the infrastructure that will become the new decoder.
No instructions adjusted so far.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-3-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This function already includes the test for an interworking write
to PC from a load. Change the T32 LDM implementation to match the
A32 LDM implementation.
For LDM, the reordering of the tests does not change valid
behaviour because the only case that differs is has rn == 15,
which is UNPREDICTABLE.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-2-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Now that the two updates from v1.3 are implemented,
update the "any" cpu to enable it.
Reviewed-by: Stafford Horne <shorne@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
These were added to the 1.3 spec. For OF32S, validate AVR.
But OF64A32 is itself new to 1.3 so no extra check needed.
Reviewed-by: Stafford Horne <shorne@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This is hardware support for double-precision floating-point using
pairs of 32-bit registers. Fix latent bugs in the heretofore unused
helper_itofd and helper_ftoid. Include the bit for cpu "any".
Change the default cpu for linux-user to "any".
Reviewed-by: Stafford Horne <shorne@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Make sure the OF32S insns are enabled before allowing execution.
Include the missing bit for cpu "any".
Reviewed-by: Stafford Horne <shorne@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
The specification of this insn is round-to-zero.
Reviewed-by: Stafford Horne <shorne@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
These registers are read-only and implementation specific.
Initiailize VR for the first time; take the OR1200 values
from the verilog source.
Note that moving fields within CPUOpenRISCState does not
affect migration.
Reviewed-by: Stafford Horne <shorne@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
These SPRs are read-only. The writes can simply be ignored,
as we already do for other read-only (or missing) registers.
There is no reason to mask the value in env->vr.
Reviewed-by: Stafford Horne <shorne@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Finish the race condition fix from the previous patch.
Reviewed-by: Stafford Horne <shorne@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
The writes to cpu_R[0] are now a race across threads, now that we
do code generation in parallel. Stage the change by introducing
a function to return the temp for R0.
Reviewed-by: Stafford Horne <shorne@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
We will need this context in the next patch.
Reviewed-by: Stafford Horne <shorne@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reorganize watchpoints out of i/o path.
Return host address from probe_write / probe_access.
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Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20190903' into staging
Allow page table bit to swap endianness.
Reorganize watchpoints out of i/o path.
Return host address from probe_write / probe_access.
# gpg: Signature made Tue 03 Sep 2019 16:47:50 BST
# gpg: using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg: issuer "richard.henderson@linaro.org"
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [full]
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A 05C0 64DF 38E8 AF7E 215F
* remotes/rth/tags/pull-tcg-20190903: (36 commits)
tcg: Factor out probe_write() logic into probe_access()
tcg: Make probe_write() return a pointer to the host page
s390x/tcg: Pass a size to probe_write() in do_csst()
hppa/tcg: Call probe_write() also for CONFIG_USER_ONLY
mips/tcg: Call probe_write() for CONFIG_USER_ONLY as well
tcg: Enforce single page access in probe_write()
tcg: Factor out CONFIG_USER_ONLY probe_write() from s390x code
s390x/tcg: Fix length calculation in probe_write_access()
s390x/tcg: Use guest_addr_valid() instead of h2g_valid() in probe_write_access()
tcg: Check for watchpoints in probe_write()
cputlb: Handle watchpoints via TLB_WATCHPOINT
cputlb: Remove double-alignment in store_helper
cputlb: Fix size operand for tlb_fill on unaligned store
exec: Factor out cpu_watchpoint_address_matches
cputlb: Fold TLB_RECHECK into TLB_INVALID_MASK
exec: Factor out core logic of check_watchpoint()
exec: Move user-only watchpoint stubs inline
target/sparc: sun4u Invert Endian TTE bit
target/sparc: Add TLB entry with attributes
cputlb: Byte swap memory transaction attribute
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Bug fixes:
* Fix die-id validation regression (Eduardo Habkost)
* vmmouse: Properly reset state (Jan Kiszka)
* hostmem-file: fix pmem file size check (Stefan Hajnoczi)
* Keep query-hotpluggable-cpus output compatible with older QEMU
if '-smp dies' is not set (Igor Mammedov)
* migration: Do not re-read the clock on pre_save in case of paused guest
(Maxiwell S. Garcia)
Cleanups:
* NUMA code cleanups (Tao Xu)
* Remove stale externs from includes (Alex Bennée)
Features:
* qapi: report the default CPU type for each machine (Daniel P. Berrangé)
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Merge remote-tracking branch 'remotes/ehabkost/tags/machine-next-pull-request' into staging
Machine + x86 queue, 2019-09-03
Bug fixes:
* Fix die-id validation regression (Eduardo Habkost)
* vmmouse: Properly reset state (Jan Kiszka)
* hostmem-file: fix pmem file size check (Stefan Hajnoczi)
* Keep query-hotpluggable-cpus output compatible with older QEMU
if '-smp dies' is not set (Igor Mammedov)
* migration: Do not re-read the clock on pre_save in case of paused guest
(Maxiwell S. Garcia)
Cleanups:
* NUMA code cleanups (Tao Xu)
* Remove stale externs from includes (Alex Bennée)
Features:
* qapi: report the default CPU type for each machine (Daniel P. Berrangé)
# gpg: Signature made Tue 03 Sep 2019 21:57:37 BST
# gpg: using RSA key 5A322FD5ABC4D3DBACCFD1AA2807936F984DC5A6
# gpg: issuer "ehabkost@redhat.com"
# gpg: Good signature from "Eduardo Habkost <ehabkost@redhat.com>" [full]
# Primary key fingerprint: 5A32 2FD5 ABC4 D3DB ACCF D1AA 2807 936F 984D C5A6
* remotes/ehabkost/tags/machine-next-pull-request:
migration: Do not re-read the clock on pre_save in case of paused guest
x86: do not advertise die-id in query-hotpluggbale-cpus if '-smp dies' is not set
i386/vmmouse: Properly reset state
hostmem-file: fix pmem file size check
qapi: report the default CPU type for each machine
pc: Don't make die-id mandatory unless necessary
pc: Improve error message when die-id is omitted
pc: Fix error message on die-id validation
numa: move numa global variable numa_info into MachineState
numa: move numa global variable have_numa_distance into MachineState
numa: move numa global variable nb_numa_nodes into MachineState
hw/arm: simplify arm_load_dtb
includes: remove stale [smp|max]_cpus externs
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* Revert and correctly fix refactoring of unallocated_encoding()
* Take exceptions on ATS instructions when needed
* aspeed/timer: Provide back-pressure information for short periods
* memory: Remove unused memory_region_iommu_replay_all()
* hw/arm/smmuv3: Log a guest error when decoding an invalid STE
* hw/arm/smmuv3: Remove spurious error messages on IOVA invalidations
* target/arm: Fix SMMLS argument order
* hw/arm: Use ARM_CPU_TYPE_NAME() macro when appropriate
* hw/arm: Correct reference counting for creation of various objects
* includes: remove stale [smp|max]_cpus externs
* tcg/README: fix typo
* atomic_template: fix indentation in GEN_ATOMIC_HELPER
* include/exec/cpu-defs.h: fix typo
* target/arm: Free TCG temps in trans_VMOV_64_sp()
* target/arm: Don't abort on M-profile exception return in linux-user mode
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Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20190903' into staging
target-arm queue:
* Revert and correctly fix refactoring of unallocated_encoding()
* Take exceptions on ATS instructions when needed
* aspeed/timer: Provide back-pressure information for short periods
* memory: Remove unused memory_region_iommu_replay_all()
* hw/arm/smmuv3: Log a guest error when decoding an invalid STE
* hw/arm/smmuv3: Remove spurious error messages on IOVA invalidations
* target/arm: Fix SMMLS argument order
* hw/arm: Use ARM_CPU_TYPE_NAME() macro when appropriate
* hw/arm: Correct reference counting for creation of various objects
* includes: remove stale [smp|max]_cpus externs
* tcg/README: fix typo
* atomic_template: fix indentation in GEN_ATOMIC_HELPER
* include/exec/cpu-defs.h: fix typo
* target/arm: Free TCG temps in trans_VMOV_64_sp()
* target/arm: Don't abort on M-profile exception return in linux-user mode
# gpg: Signature made Tue 03 Sep 2019 16:35:19 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]
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83 15CF 3C25 25ED 1436 0CDE
* remotes/pmaydell/tags/pull-target-arm-20190903: (21 commits)
target/arm: Don't abort on M-profile exception return in linux-user mode
target/arm: Free TCG temps in trans_VMOV_64_sp()
include/exec/cpu-defs.h: fix typo
atomic_template: fix indentation in GEN_ATOMIC_HELPER
tcg/README: fix typo s/afterwise/afterwards/
includes: remove stale [smp|max]_cpus externs
hw/net/xilinx_axi: Use object_initialize_child for correct ref. counting
hw/dma/xilinx_axi: Use object_initialize_child for correct ref. counting
hw/arm/fsl-imx: Add the cpu as child of the SoC object
hw/arm: Use sysbus_init_child_obj for correct reference counting
hw/arm: Use object_initialize_child for correct reference counting
hw/arm: Use ARM_CPU_TYPE_NAME() macro when appropriate
target/arm: Fix SMMLS argument order
hw/arm/smmuv3: Remove spurious error messages on IOVA invalidations
hw/arm/smmuv3: Log a guest error when decoding an invalid STE
memory: Remove unused memory_region_iommu_replay_all()
aspeed/timer: Provide back-pressure information for short periods
target/arm: Take exceptions on ATS instructions when needed
target/arm: Allow ARMCPRegInfo read/write functions to throw exceptions
target/arm: Factor out unallocated_encoding for aarch32
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This simplifies the various has_feature() checks, we already
have vu_has_feature() but it checks features, not protocol
features.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Message-Id: <20190904065021.1360-1-johannes@sipsolutions.net>
Reviewed-by: Tiwei Bie <tiwei.bie@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
- qemu-io now accepts a file to read a write pattern from
- Ensure that raw files have their first block allocated so we can probe
the O_DIRECT alignment if necessary
- Various fixes
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Merge remote-tracking branch 'remotes/maxreitz/tags/pull-block-2019-09-03' into staging
Block patches:
- qemu-io now accepts a file to read a write pattern from
- Ensure that raw files have their first block allocated so we can probe
the O_DIRECT alignment if necessary
- Various fixes
# gpg: Signature made Tue 03 Sep 2019 13:58:57 BST
# gpg: using RSA key 91BEB60A30DB3E8857D11829F407DB0061D5CF40
# gpg: issuer "mreitz@redhat.com"
# gpg: Good signature from "Max Reitz <mreitz@redhat.com>" [full]
# Primary key fingerprint: 91BE B60A 30DB 3E88 57D1 1829 F407 DB00 61D5 CF40
* remotes/maxreitz/tags/pull-block-2019-09-03:
iotests: Unify cache mode quoting
tests/check-block: Skip iotests when sanitizers are enabled
iotests: Check for enabled drivers before testing them
iotests: Add -display none to the qemu options
file-posix: fix request_alignment typo
iotests: Disable 126 for flat vmdk subformats
iotests: Disable 110 for vmdk.twoGbMaxExtentSparse
iotests: Disable broken streamOptimized tests
vmdk: Reject invalid compressed writes
iotests: Keep testing broken relative extent paths
vmdk: Use bdrv_dirname() for relative extent paths
iotests: Fix _filter_img_create()
iotests: Test allocate_first_block() with O_DIRECT
block: posix: Always allocate the first block
block: fix permission update in bdrv_replace_node
qemu-io: add pattern file for write command
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
It doesn't look like this could possibly work properly since
VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD is defined to 10, but the
dev->protocol_features has a bitmap. I suppose the peer this
was tested with also supported VHOST_USER_PROTOCOL_F_LOG_SHMFD,
in which case the test would always be false, but nevertheless
the code seems wrong.
Use has_feature() to fix this.
Fixes: d84599f56c ("libvhost-user: support host notifier")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Message-Id: <20190903200422.11693-1-johannes@sipsolutions.net>
Reviewed-by: Tiwei Bie <tiwei.bie@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Using FLR becomes convenient in cases where resetting the bus is
impractical, for example, when debugging the behavior of individual
functions.
Signed-off-by: Julia Suvorova <jusual@redhat.com>
Message-Id: <20190820163005.1880-1-jusual@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
The default backend is only used within virtio_rng_device_realize().
Replace VirtIORNGConf member default_backend by a local variable.
Adjust its type to reduce conversions.
While there, pass &error_abort instead of NULL when failure would be a
programming error.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Message-Id: <20190820160615.14616-3-lvivier@redhat.com>
Add a new RNG backend using QEMU builtin getrandom function.
It can be created and used with something like:
... -object rng-builtin,id=rng0 -device virtio-rng,rng=rng0 ...
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Message-Id: <20190820160615.14616-2-lvivier@redhat.com>
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Merge remote-tracking branch 'remotes/amarkovic/tags/mips-queue-aug-29-2019' into staging
MIPS queue for August 29th, 2019
# gpg: Signature made Thu 29 Aug 2019 11:19:28 BST
# gpg: using RSA key D4972A8967F75A65
# gpg: Good signature from "Aleksandar Markovic <amarkovic@wavecomp.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: 8526 FBF1 5DA3 811F 4A01 DD75 D497 2A89 67F7 5A65
* remotes/amarkovic/tags/mips-queue-aug-29-2019: (31 commits)
target/mips: Fix emulation of ST.W in system mode
target/mips: Clean up handling of CP0 register 31
target/mips: Clean up handling of CP0 register 30
target/mips: Clean up handling of CP0 register 29
target/mips: Clean up handling of CP0 register 28
target/mips: Clean up handling of CP0 register 27
target/mips: Clean up handling of CP0 register 26
target/mips: Clean up handling of CP0 register 25
target/mips: Clean up handling of CP0 register 24
target/mips: Clean up handling of CP0 register 23
target/mips: Clean up handling of CP0 register 20
target/mips: Clean up handling of CP0 register 19
target/mips: Clean up handling of CP0 register 18
target/mips: Clean up handling of CP0 register 17
target/mips: Clean up handling of CP0 register 16
target/mips: Clean up handling of CP0 register 15
target/mips: Clean up handling of CP0 register 14
target/mips: Clean up handling of CP0 register 13
target/mips: Clean up handling of CP0 register 12
target/mips: Clean up handling of CP0 register 11
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Current parameter was always one. We continue with that value for now
in all callers.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
---
Moved trace to socket_listen
The clock move makes the guest knows about the paused time between the
'stop' and 'migrate' commands. This is an issue in an already-paused
VM because some side effects, like process stalls, could happen
after migration.
So, this patch checks the runstate of guest in the pre_save handler and
do not re-reads the clock in case of paused state (cold migration).
Signed-off-by: Maxiwell S. Garcia <maxiwell@linux.ibm.com>
Message-Id: <20190829210711.6570-1-maxiwell@linux.ibm.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Commit 176d2cda0 (i386/cpu: Consolidate die-id validity in smp context) added
new 'die-id' topology property to CPUs and exposed it via QMP command
query-hotpluggable-cpus, which broke -device/device_add cpu-foo for existing
users that do not support die-id/dies yet. That's would be fine if it happened
to new machine type only but it also happened to old machine types,
which breaks migration from old QEMU to the new one, for example following CLI:
OLD-QEMU -M pc-i440fx-4.0 -smp 1,max_cpus=2 \
-device qemu64-x86_64-cpu,socket-id=1,core-id=0,thread-id
is not able to start with new QEMU, complaining about invalid die-id.
After discovering regression, the patch
"pc: Don't make die-id mandatory unless necessary"
makes die-id optional so old CLI would work.
However it's not enough as new QEMU still exposes die-id via query-hotpluggbale-cpus
QMP command, so the users that started old machine type on new QEMU, using all
properties (including die-id) received from QMP command (as required), won't be
able to start old QEMU using the same properties since it doesn't support die-id.
Fix it by hiding die-id in query-hotpluggbale-cpus for all machine types in case
'-smp dies' is not provided on CLI or -smp dies = 1', in which case smp_dies == 1
and APIC ID is calculated in default way (as it was before DIE support) so we won't
need compat code as in both cases the topology provided to guest via CPUID is the same.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20190902120222.6179-1-imammedo@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
nb_queue was not zeroed so that we no longer delivered events if a
previous guest left the device in an overflow state.
The state of absolute does not matter as the next vmmouse_update_handler
call will align it again.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Message-Id: <f056c7e5-fa74-469c-87f8-0f0925301b2d@web.de>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Commit 314aec4a6e ("hostmem-file: reject
invalid pmem file sizes") added a file size check that verifies the
hostmem object's size parameter against the actual devdax pmem file.
This is useful because getting the size wrong results in confusing
errors inside the guest.
However, the code doesn't work properly for files where struct
stat::st_size is zero. Hostmem-file's ->alloc() function returns early
without setting an Error, causing the following assertion failure:
qemu/memory.c:2215: memory_region_get_ram_ptr: Assertion `mr->ram_block' failed.
This patch handles the case where qemu_get_pmem_size() returns 0 but
there is no error.
Fixes: 314aec4a6e
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20190823135632.25010-1-stefanha@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
