QAPI doc comments are for QMP users: they go into the "QEMU QMP
Reference Manual" and the "QEMU Storage Daemon QMP Reference Manual".
The doc comment TODO sections are for somebody else, namely for the
people who can do: developers. Do not emit them into the user
manuals.
This elides the following TODOs:
* SchemaInfoCommand
# TODO: @success-response (currently irrelevant, because it's QGA, not QMP)
This is a note to developers adding introspection to the guest
agent. It makes no sense to users.
* @query-hotpluggable-cpus
# TODO: Better documentation; currently there is none.
This is a reminder for developers. It doesn't help users.
* @device_add
# TODO: This command effectively bypasses QAPI completely due to its
# "additional arguments" business. It shouldn't have been added to
# the schema in this form. It should be qapified properly, or
# replaced by a properly qapified command.
Likewise.
Eliding them is an improvement.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230428105429.1687850-7-armbru@redhat.com>
Reviewed-by: Ani Sinha <anisinha@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
This reverts commit 97cd74f772.
The next commit will hide TODO: sections. See there for rationale.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230428105429.1687850-6-armbru@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
@qapi_gen_depends is missing scripts/qapi/main.py. Fix that, and drop
a duplicate scripts/qapi/common.py.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230428105429.1687850-5-armbru@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
When the lexer chokes on a stray character, its shows the characters
until the next structural character in the error message. It uses a
regular expression to match a non-empty string of non-structural
characters. Bug: the regular expression treats '"' as structural.
When the lexer chokes on '"', the match fails, and trips
must_match()'s assertion. Fix the regular expression.
Fixes: 14c3279502 (qapi: Improve reporting of lexical errors)
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230428105429.1687850-4-armbru@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
We have two FIXME notes. These FIXMEs are for QAPI developers. They
are not useful for QAPI schema developers. They are marked up as
admonitions, which makes them look important in generated HTML.
Turn them into comments. QAPI developers will still see them (they
read and write the .rst). QAPI schema developers may still see
them (if they read the .rst instead of the generated .html), but "this
is just for QAPI developers" should be more obvious.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230428105429.1687850-3-armbru@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Section "Definition documentation" uses both single and double quotes
around doc text snippets. Stick to double quotes.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230428105429.1687850-2-armbru@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Hi
This is just the compression bits of the Migration PULL request for
20230428. Only change is that we don't run the compression tests by
default.
The problem already exist with compression code. The test just show
that it don't work.
- Add migration tests for (old) compress migration code (lukas)
- Make compression code independent of ram.c (lukas)
- Move compression code into ram-compress.c (lukas)
Please apply, Juan.
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Merge tag 'compression-code-pull-request' of https://gitlab.com/juan.quintela/qemu into staging
Migration PULL request (20230508 edition, take 2)
Hi
This is just the compression bits of the Migration PULL request for
20230428. Only change is that we don't run the compression tests by
default.
The problem already exist with compression code. The test just show
that it don't work.
- Add migration tests for (old) compress migration code (lukas)
- Make compression code independent of ram.c (lukas)
- Move compression code into ram-compress.c (lukas)
Please apply, Juan.
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# gpg: Signature made Mon 08 May 2023 07:51:56 PM BST
# gpg: using RSA key 1899FF8EDEBF58CCEE034B82F487EF185872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>" [undefined]
# gpg: aka "Juan Quintela <quintela@trasno.org>" [undefined]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03 4B82 F487 EF18 5872 D723
* tag 'compression-code-pull-request' of https://gitlab.com/juan.quintela/qemu:
migration: Initialize and cleanup decompression in migration.c
ram-compress.c: Make target independent
ram compress: Assert that the file buffer matches the result
ram.c: Move core decompression code into its own file
ram.c: Move core compression code into its own file
ram.c: Remove last ram.c dependency from the core compress code
ram.c: Call update_compress_thread_counts from compress_send_queued_data
ram.c: Do not call save_page_header() from compress threads
ram.c: Reset result after sending queued data
ram.c: Dont change param->block in the compress thread
ram.c: Let the compress threads return a CompressResult enum
qtest/migration-test.c: Add postcopy tests with compress enabled
qtest/migration-test.c: Add tests with compress enabled
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
meson.build files choose whether to build modules based on foo.found()
expressions. If a feature is enabled (e.g. --enable-gtk), these expressions
are true even if the code is not used by any emulator, and this results
in an unexpected difference between modular and non-modular builds.
For non-modular builds, the files are not included in any binary, and
therefore the source files are never processed. For modular builds,
however, all .so files are unconditionally built by default, and therefore
a normal "make" tries to build them. However, the corresponding trace-*.h
files are absent due to this conditional:
if have_system
trace_events_subdirs += [
...
'ui',
...
]
endif
which was added to avoid wasting time running tracetool on unused trace-events
files. This causes a compilation failure; fix it by skipping module builds
entirely if (depending on the module directory) have_block or have_system
are false.
Reported-by: Michael Tokarev <mjt@tls.msk.ru>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
--without-default-devices is a specialized option that should only be used
when configs/devices/ is changed manually.
Explain the model towards which we should tend, with respect to failures
to start guests and to run "make check".
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Adds the support for AMD EPYC Genoa generation processors. The model
display for the new processor will be EPYC-Genoa.
Adds the following new feature bits on top of the feature bits from
the previous generation EPYC models.
avx512f : AVX-512 Foundation instruction
avx512dq : AVX-512 Doubleword & Quadword Instruction
avx512ifma : AVX-512 Integer Fused Multiply Add instruction
avx512cd : AVX-512 Conflict Detection instruction
avx512bw : AVX-512 Byte and Word Instructions
avx512vl : AVX-512 Vector Length Extension Instructions
avx512vbmi : AVX-512 Vector Byte Manipulation Instruction
avx512_vbmi2 : AVX-512 Additional Vector Byte Manipulation Instruction
gfni : AVX-512 Galois Field New Instructions
avx512_vnni : AVX-512 Vector Neural Network Instructions
avx512_bitalg : AVX-512 Bit Algorithms, add bit algorithms Instructions
avx512_vpopcntdq: AVX-512 AVX-512 Vector Population Count Doubleword and
Quadword Instructions
avx512_bf16 : AVX-512 BFLOAT16 instructions
la57 : 57-bit virtual address support (5-level Page Tables)
vnmi : Virtual NMI (VNMI) allows the hypervisor to inject the NMI
into the guest without using Event Injection mechanism
meaning not required to track the guest NMI and intercepting
the IRET.
auto-ibrs : The AMD Zen4 core supports a new feature called Automatic IBRS.
It is a "set-and-forget" feature that means that, unlike e.g.,
s/w-toggled SPEC_CTRL.IBRS, h/w manages its IBRS mitigation
resources automatically across CPL transitions.
Signed-off-by: Babu Moger <babu.moger@amd.com>
Message-Id: <20230504205313.225073-8-babu.moger@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add the following featute bits.
vnmi: Virtual NMI (VNMI) allows the hypervisor to inject the NMI into the
guest without using Event Injection mechanism meaning not required to
track the guest NMI and intercepting the IRET.
The presence of this feature is indicated via the CPUID function
0x8000000A_EDX[25].
automatic-ibrs :
The AMD Zen4 core supports a new feature called Automatic IBRS.
It is a "set-and-forget" feature that means that, unlike e.g.,
s/w-toggled SPEC_CTRL.IBRS, h/w manages its IBRS mitigation
resources automatically across CPL transitions.
The presence of this feature is indicated via the CPUID function
0x80000021_EAX[8].
The documention for the features are available in the links below.
a. Processor Programming Reference (PPR) for AMD Family 19h Model 01h,
Revision B1 Processors
b. AMD64 Architecture Programmer’s Manual Volumes 1–5 Publication No. Revision
40332 4.05 Date October 2022
Signed-off-by: Santosh Shukla <santosh.shukla@amd.com>
Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Babu Moger <babu.moger@amd.com>
Link: https://www.amd.com/system/files/TechDocs/55898_B1_pub_0.50.zip
Link: https://www.amd.com/system/files/TechDocs/40332_4.05.pdf
Message-Id: <20230504205313.225073-7-babu.moger@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add the following feature bits for EPYC-Milan model and bump the version.
vaes : Vector VAES(ENC|DEC), VAES(ENC|DEC)LAST instruction support
vpclmulqdq : Vector VPCLMULQDQ instruction support
stibp-always-on : Single Thread Indirect Branch Prediction Mode has enhanced
performance and may be left Always on
amd-psfd : Predictive Store Forward Disable
no-nested-data-bp : Processor ignores nested data breakpoints
lfence-always-serializing : LFENCE instruction is always serializing
null-sel-clr-base : Null Selector Clears Base. When this bit is
set, a null segment load clears the segment base
These new features will be added in EPYC-Milan-v2. The "-cpu help" output
after the change will be.
x86 EPYC-Milan (alias configured by machine type)
x86 EPYC-Milan-v1 AMD EPYC-Milan Processor
x86 EPYC-Milan-v2 AMD EPYC-Milan Processor
The documentation for the features are available in the links below.
a. Processor Programming Reference (PPR) for AMD Family 19h Model 01h,
Revision B1 Processors
b. SECURITY ANALYSIS OF AMD PREDICTIVE STORE FORWARDING
c. AMD64 Architecture Programmer’s Manual Volumes 1–5 Publication No. Revision
40332 4.05 Date October 2022
Signed-off-by: Babu Moger <babu.moger@amd.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Link: https://www.amd.com/system/files/TechDocs/55898_B1_pub_0.50.zip
Link: https://www.amd.com/system/files/documents/security-analysis-predictive-store-forwarding.pdf
Link: https://www.amd.com/system/files/TechDocs/40332_4.05.pdf
Message-Id: <20230504205313.225073-6-babu.moger@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add the following feature bits.
no-nested-data-bp : Processor ignores nested data breakpoints.
lfence-always-serializing : LFENCE instruction is always serializing.
null-sel-cls-base : Null Selector Clears Base. When this bit is
set, a null segment load clears the segment base.
The documentation for the features are available in the links below.
a. Processor Programming Reference (PPR) for AMD Family 19h Model 01h,
Revision B1 Processors
b. AMD64 Architecture Programmer’s Manual Volumes 1–5 Publication No. Revision
40332 4.05 Date October 2022
Signed-off-by: Babu Moger <babu.moger@amd.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Link: https://www.amd.com/system/files/TechDocs/55898_B1_pub_0.50.zip
Link: https://www.amd.com/system/files/TechDocs/40332_4.05.pdf
Message-Id: <20230504205313.225073-5-babu.moger@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add the following feature bits.
amd-psfd : Predictive Store Forwarding Disable:
PSF is a hardware-based micro-architectural optimization
designed to improve the performance of code execution by
predicting address dependencies between loads and stores.
While SSBD (Speculative Store Bypass Disable) disables both
PSF and speculative store bypass, PSFD only disables PSF.
PSFD may be desirable for the software which is concerned
with the speculative behavior of PSF but desires a smaller
performance impact than setting SSBD.
Depends on the following kernel commit:
b73a54321ad8 ("KVM: x86: Expose Predictive Store Forwarding Disable")
stibp-always-on :
Single Thread Indirect Branch Prediction mode has enhanced
performance and may be left always on.
The documentation for the features are available in the links below.
a. Processor Programming Reference (PPR) for AMD Family 19h Model 01h,
Revision B1 Processors
b. SECURITY ANALYSIS OF AMD PREDICTIVE STORE FORWARDING
Signed-off-by: Babu Moger <babu.moger@amd.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Link: https://www.amd.com/system/files/documents/security-analysis-predictive-store-forwarding.pdf
Link: https://www.amd.com/system/files/TechDocs/55898_B1_pub_0.50.zip
Message-Id: <20230504205313.225073-4-babu.moger@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Introduce new EPYC cpu versions: EPYC-v4 and EPYC-Rome-v3.
The only difference vs. older models is an updated cache_info with
the 'complex_indexing' bit unset, since this bit is not currently
defined for AMD and may cause problems should it be used for
something else in the future. Setting this bit will also cause
CPUID validation failures when running SEV-SNP guests.
Signed-off-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Babu Moger <babu.moger@amd.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20230504205313.225073-3-babu.moger@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
New EPYC CPUs versions require small changes to their cache_info's.
Because current QEMU x86 CPU definition does not support versioned
cach_info, we would have to declare a new CPU type for each such case.
To avoid the dup work, add "cache_info" in X86CPUVersionDefinition",
to allow new cache_info pointers to be specified for a new CPU version.
Co-developed-by: Wei Huang <wei.huang2@amd.com>
Signed-off-by: Wei Huang <wei.huang2@amd.com>
Signed-off-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Babu Moger <babu.moger@amd.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20230504205313.225073-2-babu.moger@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Commit cf60ccc330 ("cutils: Introduce bundle mechanism") abandoned
compatibility with Windows older than 8 - we should reflect this
in our _WIN32_WINNT and set it to the value that corresponds to
Windows 8.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20230504081351.125140-1-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This fixes compress with colo.
Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Make ram-compress.c target independent.
Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Before this series, "nothing to send" was handled by the file buffer
being empty. Now it is tracked via param->result.
Assert that the file buffer state matches the result.
Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
No functional changes intended.
Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Make compression interfaces take send_queued_data() as an argument.
Remove save_page_use_compression() from flush_compressed_data().
This removes the last ram.c dependency from the core compress code.
Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This makes the core compress code more independend from ram.c.
Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
save_page_header() accesses several global variables, so calling it
from multiple threads is pretty ugly.
Instead, call save_page_header() before writing out the compressed
data from the compress buffer to the migration stream.
This also makes the core compress code more independend from ram.c.
Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
And take the param->mutex lock for the whole section to ensure
thread-safety.
Now, it is explicitly clear if there is no queued data to send.
Before, this was handled by param->file stream being empty and thus
qemu_put_qemu_file() not sending anything.
This will be used in the next commits to move save_page_header()
out of compress code.
Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Instead introduce a extra parameter to trigger the compress thread.
Now, when the compress thread is done, we know what RAMBlock and
offset it did compress.
This will be used in the next commits to move save_page_header()
out of compress code.
Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This will be used in the next commits to move save_page_header()
out of compress code.
Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Add postcopy tests with compress enabled to ensure nothing breaks
with the refactoring in the next commits.
preempt+compress is blocked, so no test needed for that case.
Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
There has never been tests for migration with compress enabled.
Add suitable tests, testing with compress-wait-thread = false
too.
Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Acked-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
The load side can use a relaxed load, which will surely happen before
the work item is run by async_safe_run_on_cpu() or before double-checking
under mmap_lock. The store side can use an atomic RMW operation.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Use a store-release when enqueuing a new call_rcu, and a load-acquire
when dequeuing; and read the tail after checking that node->next is
consistent, which is the standard message passing pattern and it is
clearer than mb_read/mb_set.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Instead of using qatomic_mb_{read,set} mindlessly, just use a per-coroutine
flag that requires no synchronization.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The remaining use of mb_read/mb_set is just to force a thread to exit
eventually. It does not order two memory accesses and therefore can be
just read/set.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The calling function is already working with hwaddr and uint64_t so
lets avoid bringing target_ulong in if we don't need to.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20230404132711.2563638-1-alex.bennee@linaro.org>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20230504122810.4094787-45-gaosong@loongson.cn>
Introduce set_fpr() and get_fpr() and remove cpu_fpr.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20230504122810.4094787-44-gaosong@loongson.cn>
This patch includes:
- VLDI.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20230504122810.4094787-43-gaosong@loongson.cn>
This patch includes:
- VFCMP.cond.{S/D}.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20230504122810.4094787-37-gaosong@loongson.cn>
