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Fri, 10 Jul 2026 11:05:40 -0700 (PDT) X-Received: by 2002:a05:6000:230e:b0:477:1ef3:311a with SMTP id ffacd0b85a97d-47df077f6ccmr14423779f8f.57.1783706740494; Fri, 10 Jul 2026 11:05:40 -0700 (PDT) To: devel@lists.libvirt.org Subject: [PATCH 4/6] qemu: emit vlen= CPU property on the command line Date: Fri, 10 Jul 2026 20:05:21 +0200 Message-ID: <20260710180523.54387-5-heinrich.schuchardt@canonical.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260710180523.54387-1-heinrich.schuchardt@canonical.com> References: <20260710180523.54387-1-heinrich.schuchardt@canonical.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Message-ID-Hash: 6DSCHHZUQOR32MXA22P3JOIPDE22EXIS X-Message-ID-Hash: 6DSCHHZUQOR32MXA22P3JOIPDE22EXIS X-MailFrom: heinrich.schuchardt@canonical.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; header-match-devel.lists.libvirt.org-0; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: Heinrich Schuchardt X-Mailman-Version: 3.3.10 Precedence: list List-Id: Development discussions about the libvirt library & tools Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: Heinrich Schuchardt via Devel Reply-To: Heinrich Schuchardt X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1783707668223158500 Content-Type: text/plain; charset="utf-8" When the RISC-V vector length is configured via , append ',vlen=3DN' to the -cpu argument, e.g. '-cpu rv64,vlen=3D256'. Signed-off-by: Heinrich Schuchardt --- src/qemu/qemu_command.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index e726dc661c..56e217874e 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -6508,6 +6508,9 @@ qemuBuildCpuModelArgStr(virQEMUDriver *driver, if (cpu->vendor_id) virBufferAsprintf(buf, ",vendor=3D%s", cpu->vendor_id); =20 + if (cpu->vlen) + virBufferAsprintf(buf, ",vlen=3D%u", cpu->vlen); + if (ARCH_IS_X86(def->os.arch) && virQEMUCapsGetCPUFeatures(qemuCaps, def->virtType, false, &knownFe= atures) < 0) return -1; --=20 2.53.0