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{ "id": 2195656, "url": "http://patchwork.ozlabs.org/api/covers/2195656/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/cover/20260211153032.19327-1-sebott@redhat.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260211153032.19327-1-sebott@redhat.com>", "list_archive_url": null, "date": "2026-02-11T15:30:30", "name": "[v5,0/2] arm: add kvm-psci-version vcpu property", "submitter": { "id": 86446, "url": "http://patchwork.ozlabs.org/api/people/86446/?format=api", "name": "Sebastian Ott", "email": "sebott@redhat.com" }, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/cover/20260211153032.19327-1-sebott@redhat.com/mbox/", "series": [ { "id": 491863, "url": "http://patchwork.ozlabs.org/api/series/491863/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=491863", "date": "2026-02-11T15:30:31", "name": "arm: add kvm-psci-version vcpu property", "version": 5, "mbox": "http://patchwork.ozlabs.org/series/491863/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/2195656/comments/", "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=g3WL7fca;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=google header.b=fKDADG94;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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envelope-from=sebott@redhat.com;\n helo=us-smtp-delivery-124.mimecast.com", "X-Spam_score_int": "-20", "X-Spam_score": "-2.1", "X-Spam_bar": "--", "X-Spam_report": "(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=0.001,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001,\n SPF_HELO_PASS=-0.001,\n SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no", "X-Spam_action": "no action", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "This series adds a vcpu knob to request a specific PSCI version\nfrom KVM via the KVM_REG_ARM_PSCI_VERSION FW register.\n\nThe use case for this is to support migration between host kernels\nthat differ in their default (a.k.a. most recent) PSCI version.\n\nNote: in order to support PSCI v0.1 we need to drop vcpu\ninitialization with KVM_CAP_ARM_PSCI_0_2 in that case.\nAlternatively we could limit support to versions >=0.2 .\n\nChanges since V4 [4]:\n* incorporated feedback from Peter\n* added R-B, T-B\nChanges since V3 [3]:\n* changed variable name as requested by Eric\n* added R-B\nChanges since V2 [2]:\n* fix kvm_get_psci_version() when the prop is not specified - thanks Eric!\n* removed the assertion in kvm_get_psci_version() so that this also works\n with a future kernel/psci version\n* added R-B\nChanges since V1 [1]:\n* incorporated feedback from Peter and Eric\n\n[1] https://lore.kernel.org/kvmarm/20250911144923.24259-1-sebott@redhat.com/\n[2] https://lore.kernel.org/kvmarm/20251030165905.73295-1-sebott@redhat.com/\n[3] https://lore.kernel.org/kvmarm/20251112181357.38999-1-sebott@redhat.com/\n[4] https://lore.kernel.org/kvmarm/20251202160853.22560-1-sebott@redhat.com/\n\nSebastian Ott (2):\n target/arm/kvm: add constants for new PSCI versions\n target/arm/kvm: add kvm-psci-version vcpu property\n\n docs/system/arm/cpu-features.rst | 11 ++++++\n target/arm/cpu.h | 6 +++\n target/arm/kvm-consts.h | 2 +\n target/arm/kvm.c | 65 +++++++++++++++++++++++++++++++-\n 4 files changed, 83 insertions(+), 1 deletion(-)" }