The commentary talks about "in concert with the addresses
assigned in the relevant linker script", except there is no
linker script for softmmu, nor has there been for some time.
(Do not confuse the user-only linker script editing that was
removed in the previous patch, because user-only does not
use this code_gen_buffer allocation method.)
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Partial cleanup from the CONFIG_VECTOR16 removal.
Replace DO_CMP0 with its scalar expansion, a simple negation.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Partial cleanup from the CONFIG_VECTOR16 removal.
Replace the DUP* expansions with the scalar argument.
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Partial cleanup from the CONFIG_VECTOR16 removal.
Replace the vec* types with their scalar expansions.
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
The comment in tcg-runtime-gvec.c about CONFIG_VECTOR16 says that
tcg-op-gvec.c has eliminated size 8 vectors, and only passes on
multiples of 16. This may have been true of the first few operations,
but is not true of all operations.
In particular, multiply, shift by scalar, and compare of 8- and 16-bit
elements are not expanded inline if host vector operations are not
supported.
For an x86_64 host that does not support AVX, this means that we will
fall back to the helper, which will attempt to use SSE instructions,
which will SEGV on an invalid 8-byte aligned memory operation.
This patch simply removes the CONFIG_VECTOR16 code and configuration
without further simplification.
Buglink: https://bugs.launchpad.net/bugs/1863508
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
While 32mb is certainly usable a full system boot ends up flushing the
codegen buffer nearly 100 times. Increase the default on 64 bit hosts
to take advantage of all that spare memory. After this change I can
boot my tests system without any TB flushes.
As we usually run more CONFIG_USER binaries at a time in typical usage
we aren't quite as profligate for user-mode code generation usage. We
also bring the static code gen defies to the same place to keep all
the reasoning in the comments together.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Message-Id: <20200228192415.19867-5-alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
There is no particular reason to use a static codegen buffer on 64 bit
hosts as we have address space to burn. Allow the common CONFIG_USER
case to use the mmap'ed buffers like SoftMMU.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Message-Id: <20200228192415.19867-4-alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Basing the TB cache size on the ram_size was always a little heuristic
and was broken by a1b18df9a4 which caused ram_size not to be fully
realised at the time we initialise the TCG translation cache.
The current DEFAULT_CODE_GEN_BUFFER_SIZE may still be a little small
but follow-up patches will address that.
Fixes: a1b18df9a4
Cc: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Message-Id: <20200228192415.19867-3-alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
It's easier to read.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200228192415.19867-2-alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
The bug describes a race whereby cpu_exec_step_atomic can acquire a TB
which is invalidated by a tb_flush before we execute it. This doesn't
affect the other cpu_exec modes as a tb_flush by it's nature can only
occur on a quiescent system. The race was described as:
B2. tcg_cpu_exec => cpu_exec => tb_find => tb_gen_code
B3. tcg_tb_alloc obtains a new TB
C3. TB obtained with tb_lookup__cpu_state or tb_gen_code
(same TB as B2)
A3. start_exclusive critical section entered
A4. do_tb_flush is called, TB memory freed/re-allocated
A5. end_exclusive exits critical section
B2. tcg_cpu_exec => cpu_exec => tb_find => tb_gen_code
B3. tcg_tb_alloc reallocates TB from B2
C4. start_exclusive critical section entered
C5. cpu_tb_exec executes the TB code that was free in A4
The simplest fix is to widen the exclusive period to include the TB
lookup. As a result we can drop the complication of checking we are in
the exclusive region before we end it.
Cc: Yifan <me@yifanlu.com>
Buglink: https://bugs.launchpad.net/qemu/+bug/1863025
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200214144952.15502-1-alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
kvm_vm_ioctl() can fail, check its return value, and log an error
when it failed. This fixes Coverity CID 1412229:
Unchecked return value (CHECKED_RETURN)
check_return: Calling kvm_vm_ioctl without checking return value
Reported-by: Coverity (CID 1412229)
Fixes: 235e8982ad ("support using KVM_MEM_READONLY flag for regions")
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Message-Id: <20200221163336.2362-1-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The address_space_rw() function allows either reads or writes
depending on the is_write argument passed to it; this is useful
when the direction of the access is determined programmatically
(as for instance when handling the KVM_EXIT_MMIO exit reason).
Under the hood it just calls either address_space_write() or
address_space_read_full().
We also use it a lot with a constant is_write argument, though,
which has two issues:
* when reading "address_space_rw(..., 1)" this is less
immediately clear to the reader as being a write than
"address_space_write(...)"
* calling address_space_rw() bypasses the optimization
in address_space_read() that fast-paths reads of a
fixed length
This commit was produced with the included Coccinelle script
scripts/coccinelle/exec_rw_const.cocci.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20200218112457.22712-1-peter.maydell@linaro.org>
[PMD: Update macvm_set_cr0() reported by Laurent Vivier]
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* Cleanups (Philippe)
* virtio-scsi fix (Pan Nengyuan)
* Tweak Skylake-v3 model id (Kashyap)
* x86 UCODE_REV support and nested live migration fix (myself)
* Advisory mode for pvpanic (Zhenwei)
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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging
* Register qdev properties as class properties (Marc-André)
* Cleanups (Philippe)
* virtio-scsi fix (Pan Nengyuan)
* Tweak Skylake-v3 model id (Kashyap)
* x86 UCODE_REV support and nested live migration fix (myself)
* Advisory mode for pvpanic (Zhenwei)
# gpg: Signature made Fri 24 Jan 2020 20:16:23 GMT
# gpg: using RSA key BFFBD25F78C7AE83
# 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
* remotes/bonzini/tags/for-upstream: (58 commits)
build-sys: clean up flags included in the linker command line
target/i386: Add the 'model-id' for Skylake -v3 CPU models
qdev: use object_property_help()
qapi/qmp: add ObjectPropertyInfo.default-value
qom: introduce object_property_help()
qom: simplify qmp_device_list_properties()
vl: print default value in object help
qdev: register properties as class properties
qdev: move instance properties to class properties
qdev: rename DeviceClass.props
qdev: set properties with device_class_set_props()
object: return self in object_ref()
object: release all props
object: add object_class_property_add_link()
object: express const link with link property
object: add direct link flag
object: rename link "child" to "target"
object: check strong flag with &
object: do not free class properties
object: add object_property_set_default
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Commit af0440ae85 moved the qemu_tcg_configure() function,
but introduced extraneous 'include/' in the includes path.
As it is not necessary, remove it.
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20200121110349.25842-11-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
We actually want to access the accelerator, not the machine, so
use the current_accel() wrapper instead.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200121110349.25842-10-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The accel/ code only accesses the MachineState::accel field.
As we simply want to access the accelerator, not the machine,
add a current_accel() wrapper.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20200121110349.25842-9-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Do not call get_clock_realtime() in tlb_mmu_resize_locked,
but hoist outside of any loop over a set of tlbs. This is
only two (indirect) callers, tlb_flush_by_mmuidx_async_work
and tlb_flush_page_locked, so not onerous.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
There's little point in leaving these data structures half initialized,
and relying on a flush to be done during reset.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Merge into the only caller, but at the same time split
out tlb_mmu_init to initialize a single tlb entry.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
We will want to be able to flush a tlb without resizing.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
No functional change, but the smaller expressions make
the code easier to read.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
No functional change, but the smaller expressions make
the code easier to read.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
We do not need the entire CPUArchState to compute these values.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
There are no users of this function outside cputlb.c,
and its interface will change in the next patch.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
There is only one caller for tlb_table_flush_by_mmuidx. Place
the result at the earlier line number, due to an expected user
in the near future.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
In target/arm we will shortly have "too many" mmu_idx.
The current minimum barrier is caused by the way in which
tlb_flush_page_by_mmuidx is coded.
We can remove this limitation by allocating memory for
consumption by the worker. Let us assume that this is
the unlikely case, as will be the case for the majority
of targets which have so far satisfied the BUILD_BUG_ON,
and only allocate memory when necessary.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
We currently search both the root and the tcg/ directories for tcg
files:
$ git grep '#include "tcg/' | wc -l
28
$ git grep '#include "tcg[^/]' | wc -l
94
To simplify the preprocessor search path, unify by expliciting the
tcg/ directory.
Patch created mechanically by running:
$ for x in \
tcg.h tcg-mo.h tcg-op.h tcg-opc.h \
tcg-op-gvec.h tcg-gvec-desc.h; do \
sed -i "s,#include \"$x\",#include \"tcg/$x\"," \
$(git grep -l "#include \"$x\""); \
done
Acked-by: David Gibson <david@gibson.dropbear.id.au> (ppc parts)
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200101112303.20724-2-philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reduce the amount of preprocessor obfuscation by expanding
the text of each of the functions generated. The result is
only slightly smaller than the original.
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
With the tracing hooks, the inline functions are no longer
so simple. Reduce the amount of preprocessor obfuscation
by expanding the text of each of the functions generated.
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
There are no uses of the *_cmmu names other than the bare wrapping
within the *_code inlines. Therefore rename the functions so we
can drop the inlines.
Use abi_ptr instead of target_ulong in preparation for user-only;
the two types are identical for softmmu.
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
With the tracing hooks, the inline functions are no longer
so simple. Once out-of-line, the current tlb_entry lookup
is redundant with the one in the main load/store_helper.
This also begins the introduction of a new target facing
interface, with suffix *_mmuidx_ra. This is not yet
official because the interface is not done for user-only.
Use abi_ptr instead of target_ulong in preparation for
user-only; the two types are identical for softmmu.
What remains in cpu_ldst_template.h are the expansions
for _code, _data, and MMU_MODE<N>_SUFFIX.
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Code movement in an upcoming patch will show that this file
was implicitly depending on tcg.h being included indirectly.
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
It is easy for the atomic helpers to use trace_mem_build_info
directly, without resorting to symbol pasting. For this usage,
we cannot use trace_mem_get_info, because the MemOp does not
support 16-byte accesses.
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Commit 11bc4a13d1 ("kvm: convert "-machine kernel_irqchip" to an
accelerator property") moves kernel_irqchip property from "-machine" to
"-accel kvm", but it forgets to set the default value of
kernel_irqchip_allowed and kernel_irqchip_split.
Also cleaning up the three useless members (kernel_irqchip_allowed,
kernel_irqchip_required, kernel_irqchip_split) in struct MachineState.
Fixes: 11bc4a13d1 ("kvm: convert "-machine kernel_irqchip" to an accelerator property")
Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Message-Id: <20191228104326.21732-1-xiaoyao.li@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
- test tci with Travis
- enable multiarch testing in Travis
- default to out-of-tree builds
- make changing logfile safe via RCU
- remove redundant tests
- remove gtester test from docker
- convert DEBUG_MMAP to tracepoints
- remove hand rolled glob function
- trigger tcg re-configure when needed
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Merge remote-tracking branch 'remotes/stsquad/tags/pull-tesing-and-misc-191219-1' into staging
Various testing and logging updates
- test tci with Travis
- enable multiarch testing in Travis
- default to out-of-tree builds
- make changing logfile safe via RCU
- remove redundant tests
- remove gtester test from docker
- convert DEBUG_MMAP to tracepoints
- remove hand rolled glob function
- trigger tcg re-configure when needed
# gpg: Signature made Thu 19 Dec 2019 08:24:08 GMT
# gpg: using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [full]
# Primary key fingerprint: 6685 AE99 E751 67BC AFC8 DF35 FBD0 DB09 5A9E 2A44
* remotes/stsquad/tags/pull-tesing-and-misc-191219-1: (25 commits)
tests/tcg: ensure we re-configure if configure.sh is updated
trace: replace hand-crafted pattern_glob with g_pattern_match_simple
linux-user: convert target_munmap debug to a tracepoint
linux-user: log page table changes under -d page
linux-user: add target_mmap_complete tracepoint
linux-user: convert target_mmap debug to tracepoint
linux-user: convert target_mprotect debug to tracepoint
travis.yml: Remove the redundant clang-with-MAIN_SOFTMMU_TARGETS entry
docker: gtester is no longer used
Added tests for close and change of logfile.
Add use of RCU for qemu_logfile.
qemu_log_lock/unlock now preserves the qemu_logfile handle.
Add a mutex to guarantee single writer to qemu_logfile handle.
Cleaned up flow of code in qemu_set_log(), to simplify and clarify.
Fix double free issue in qemu_set_log_filename().
ci: build out-of-tree
travis.yml: Enable builds on arm64, ppc64le and s390x
tests/test-util-filemonitor: Skip test on non-x86 Travis containers
tests/hd-geo-test: Skip test when images can not be created
iotests: Skip test 079 if it is not possible to create large files
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
qemu_log_lock() now returns a handle and qemu_log_unlock() receives a
handle to unlock. This allows for changing the handle during logging
and ensures the lock() and unlock() are for the same file.
Also in target/tilegx/translate.c removed the qemu_log_lock()/unlock()
calls (and the log("\n")), since the translator can longjmp out of the
loop if it attempts to translate an instruction in an inaccessible page.
Signed-off-by: Robert Foley <robert.foley@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20191118211528.3221-5-robert.foley@linaro.org>
The KVMState struct is opaque, so provide accessors for the fields
that will be moved from current_machine to the accelerator. For now
they just forward to the machine object, but this will change.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
-tb-size fits nicely in the new framework for accelerator-specific options. It
is a very niche option, so insta-deprecate it.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Replace the ad-hoc qemu_tcg_configure with generic code invoking QOM
property getters and setters. More properties (and thus more valid
-accel suboptions) will be added in the next patches, which will move
accelerator-related "-machine" options to accelerators.
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
We will have to set QOM properties before accel_init_machine, based on the
options provided to -accel. Construct the object outside it so that it
will be possible to iterate on properties between object_new_with_class
and accel_init_machine.
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Similar to CPU and machine classes, "-accel" class names are mangled,
so we have to first get a class via accel_find and then instantiate it.
Provide a new function to instantiate a class without going through
object_class_get_name, and use it for CPUs and machines already.
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Now that accel/accel.c does not use CONFIG_TCG or CONFIG_KVM anymore,
it need not be compiled once for every softmmu target.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The next step is to move the parsing of "-machine accel=..." into vl.c,
unifying it with the configure_accelerators() function that has just
been introduced. This way, we will be able to desugar it into multiple
"-accel" options, without polluting accel/accel.c.
The CONFIG_TCG and CONFIG_KVM symbols are not available in vl.c, but
we can use accel_find instead to find their value at runtime. Once we
know that the binary has one of TCG or KVM, the default accelerator
can be expressed simply as "tcg:kvm", because TCG never fails to initialize.
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Move everything related to mttcg_enabled in accel/tcg/tcg-all.c,
which will make even more sense when "thread" becomes a QOM property.
For now, initializing mttcg_enabled in the instance_init function
prepares for the next patch, which will only invoke qemu_tcg_configure
when the command line includes a -accel option.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
kvm_set_phys_mem can be called to reallocate a slot by something the
guest does (e.g. writing to PAM and other chipset registers).
This can happen in the middle of a migration, and if we're unlucky
it can now happen between the split 'sync' and 'clear'; the clear
asserts if there's no bmap to clear. Recreate the bmap whenever
we change the slot, keeping the clear path happy.
Typically this is triggered by the guest rebooting during a migrate.
Corresponds to:
https://bugzilla.redhat.com/show_bug.cgi?id=1772774https://bugzilla.redhat.com/show_bug.cgi?id=1771032
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Awareness of an in kernel irqchip is usually local to the machine and its
top-level interrupt controller. However, in a few cases other things need
to know about it. In particular vfio devices need this in order to
accelerate interrupt delivery.
If interrupt routing is changed, such devices may need to readjust their
connection to the KVM irqchip. pci_bus_fire_intx_routing_notifier() exists
to do just this.
However, for the pseries machine type we have a situation where the routing
remains constant but the top-level irq chip itself is changed. This occurs
because of PAPR feature negotiation which allows the guest to decide
between the older XICS and newer XIVE irq chip models (both of which are
paravirtualized).
To allow devices like vfio to adjust to this change, introduce a new
notifier for the purpose kvm_irqchip_change_notify().
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Tested-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
All targets have now migrated away from the old unassigned_access
hook to the new do_transaction_failed hook. This means we can remove
the core-code infrastructure for that hook and the code that calls it.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20191108173732.11816-1-peter.maydell@linaro.org
