From patchwork Tue Jun 18 06:38:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shaoqin Huang X-Patchwork-Id: 13701824 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 90CAB288BD for ; Tue, 18 Jun 2024 06:38:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718692704; cv=none; b=m4WB4PeKp9GvH/pAnO758hqnIsl+xChlL54PGmSgVo+TRv9ZVvehltM9d21y0dbaBbXlJCdkxC7J1IFwQvtyAJSoBtow/MHnDsZzEQVFJmKt4fGlqbqlu2O0+qCHrn3rRH0+gcqszc4CPUfHFH1SMiehedsjTcZiMokzO7xz/6A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718692704; c=relaxed/simple; bh=XH8nnA+L/XaE9OKZI4l4T6Wu7V9Tc6Kd2ydK5BwKzr4=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=R56R1YxBXTu68xqiRkbaI/jCCNypPZV1fZRujQdTpNnVA2ok2m1d8AxdzLIosdOyhp4Toy19b/I+hDXFdDkNJu+d/F7sjuEoWML3iWbwVht1NoqrNz+lL+PJfQgGrFtc7wVX9qj0JH95NEvwF5dR6IbtVM4ZjjYQBDJimejA25s= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=KEMbttO0; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="KEMbttO0" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1718692701; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=IfLvXm2V5JOTZZDkXFJiskwnoCllrw9pJu6yeA9YaNw=; b=KEMbttO0F83tFcLBGSvjzPsSFNRTN1jK/I70EfZcFpGhbiTjaM5S8ojoIXVp+S4osePVc+ awAtqlHXXJFcVKlsqjPYECGH9sZ3kOLpjfwABJf0xdiisZ0FjOF6+xsgNmRakn8dBDE2zx t0oqYo9J9xSrSCpjCcrEOTGUCSKCxy4= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-449-Yf6jUZeuPLCpVYUnFZO6Tg-1; Tue, 18 Jun 2024 02:38:18 -0400 X-MC-Unique: Yf6jUZeuPLCpVYUnFZO6Tg-1 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 3F50019560B9; Tue, 18 Jun 2024 06:38:14 +0000 (UTC) Received: from virt-mtcollins-01.lab.eng.rdu2.redhat.com (virt-mtcollins-01.lab.eng.rdu2.redhat.com [10.8.1.196]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 0C9F41956052; Tue, 18 Jun 2024 06:38:10 +0000 (UTC) From: Shaoqin Huang To: Oliver Upton , Marc Zyngier , kvmarm@lists.linux.dev Cc: Shaoqin Huang , Catalin Marinas , James Morse , kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Paolo Bonzini , Shuah Khan , Suzuki K Poulose , Will Deacon , Zenghui Yu Subject: [PATCH v2 0/2] Allow userspace to change ID_AA64PFR1_EL1 Date: Tue, 18 Jun 2024 02:38:05 -0400 Message-Id: <20240618063808.1040085-1-shahuang@redhat.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Allow userspace to change the guest-visible value of the register with some severe limitation: - No changes to features not virtualized by KVM (MPAM_frac, RAS_frac) Also add the selftest for it. Changelog: ---------- v1 -> v2: * Tackling the full register instead of single field. * Changing the patch title and commit message. RFCv1 -> v1: * Fix the compilation error. * Delete the machine specific information and make the description more generable. RFCv1: https://lore.kernel.org/all/20240612023553.127813-1-shahuang@redhat.com/ v1: https://lore.kernel.org/all/20240617075131.1006173-1-shahuang@redhat.com/ Shaoqin Huang (2): KVM: arm64: Allow userspace to change ID_AA64PFR1_EL1 KVM: selftests: aarch64: Add writable test for ID_AA64PFR1_EL1 arch/arm64/kvm/sys_regs.c | 3 ++- tools/testing/selftests/kvm/aarch64/set_id_regs.c | 9 +++++++++ 2 files changed, 11 insertions(+), 1 deletion(-)