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2025-07-13docs: remove repeated wordAndrew Kreimer1-1/+1
The word 'find' appears twice, remove the extra one. Signed-off-by: Andrew Kreimer <algonell@gmail.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2025-01-13target/arm: change default pauth algorithm to impdefPierrick Bouvier1-1/+1
Pointer authentication on aarch64 is pretty expensive (up to 50% of execution time) when running a virtual machine with tcg and -cpu max (which enables pauth=on). The advice is always: use pauth-impdef=on. Our documentation even mentions it "by default" in docs/system/introduction.rst. Thus, we change the default to use impdef by default. This does not affect kvm or hvf acceleration, since pauth algorithm used is the one from host cpu. This change is retro compatible, in terms of cli, with previous versions, as the semantic of using -cpu max,pauth-impdef=on, and -cpu max,pauth-qarma3=on is preserved. The new option introduced in previous patch and matching old default is -cpu max,pauth-qarma5=on. It is retro compatible with migration as well, by defining a backcompat property, that will use qarma5 by default for virt machine <= 9.2. Tested by saving and restoring a vm from qemu 9.2.0 into qemu-master (10.0) for cpus neoverse-n2 and max. Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20241219183211.3493974-3-pierrick.bouvier@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2024-03-15docs/s390: clarify even more that cpu-topology is KVM-onlyClaudio Fontana1-0/+2
At least for now cpu-topology is implemented only for KVM. We already say this, but this tries to be more explicit, and also show it in the examples. This adds a new reference in the introduction that we can point to, whenever we need to reference accelerators and how to select them. Signed-off-by: Claudio Fontana <cfontana@suse.de> Message-ID: <20240314172218.16478-1-cfontana@suse.de> Reviewed-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com> Tested-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Thomas Huth <thuth@redhat.com>
2023-08-31accel: Remove HAX acceleratorPhilippe Mathieu-Daudé1-3/+0
HAX is deprecated since commits 73741fda6c ("MAINTAINERS: Abort HAXM maintenance") and 90c167a1da ("docs/about/deprecated: Mark HAXM in QEMU as deprecated"), released in v8.0.0. Per the latest HAXM release (v7.8 [*]), the latest QEMU supported is v7.2: Note: Up to this release, HAXM supports QEMU from 2.9.0 to 7.2.0. The next commit (https://github.com/intel/haxm/commit/da1b8ec072) added: HAXM v7.8.0 is our last release and we will not accept pull requests or respond to issues after this. It became very hard to build and test HAXM. Its previous maintainers made it clear they won't help. It doesn't seem to be a very good use of QEMU maintainers to spend their time in a dead project. Save our time by removing this orphan zombie code. [*] https://github.com/intel/haxm/releases/tag/v7.8.0 Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Acked-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20230831082016.60885-1-philmd@linaro.org>
2023-04-20docs: Fix typo (wphx => whpx)Stefan Weil1-1/+1
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1529 Signed-off-by: Stefan Weil <sw@weilnetz.de> Message-Id: <20230409201007.1157671-1-sw@weilnetz.de> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Thomas Huth <thuth@redhat.com>
2023-02-02docs: add an introduction to the system docsAlex Bennée1-0/+220
Drop the frankly misleading quickstart section for a more rounded introduction section. This new section gives an overview of the accelerators as well as a high level introduction to some of the key features of the emulator. We also expand on a general form for a QEMU command line with a hopefully not too scary worked example of what this looks like. Acked-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Kashyap Chamarthy <kchamart@redhat.com> Message-Id: <20230124180127.1881110-23-alex.bennee@linaro.org>