From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-2.mta1.migadu.com (out-2.mta1.migadu.com [95.215.58.2]) (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 41839848E for ; Mon, 20 Mar 2023 22:10:34 +0000 (UTC) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1679350232; 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: in-reply-to:in-reply-to:references:references; bh=g5r/nxvUmD7imNRO81Xhjg+6YJH/avavC5N84p/0LnA=; b=vnRCAF1E7D6wgpadRvLKxtvlNRal0WgxFBkTvCNerPN9qkxZlmPGp0epqBoxZ5ksEct4X0 9v8ERRBMxaKQmSzQ68dFuLTyNDI3bqMLuraTMfIOleW2pkzYcJ1GAQRAttPC/07aKqnOlo Owdt+yWi9iumoCsm86eMmchmlIWwl1A= From: Oliver Upton To: kvmarm@lists.linux.dev Cc: kvm@vger.kernel.org, Paolo Bonzini , Marc Zyngier , James Morse , Suzuki K Poulose , Zenghui Yu , Sean Christopherson , Salil Mehta , Oliver Upton Subject: [PATCH 03/11] KVM: arm64: Add vm fd device attribute accessors Date: Mon, 20 Mar 2023 22:09:54 +0000 Message-Id: <20230320221002.4191007-4-oliver.upton@linux.dev> In-Reply-To: <20230320221002.4191007-1-oliver.upton@linux.dev> References: <20230320221002.4191007-1-oliver.upton@linux.dev> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT A subsequent change will allow userspace to convey a filter for hypercalls through a vm device attribute. Add the requisite boilerplate for vm attribute accessors. Signed-off-by: Oliver Upton --- arch/arm64/kvm/arm.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 3bd732eaf087..b6e26c0e65e5 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -1439,11 +1439,28 @@ static int kvm_vm_ioctl_set_device_addr(struct kvm *kvm, } } +static int kvm_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) +{ + switch (attr->group) { + default: + return -ENXIO; + } +} + +static int kvm_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) +{ + switch (attr->group) { + default: + return -ENXIO; + } +} + long kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) { struct kvm *kvm = filp->private_data; void __user *argp = (void __user *)arg; + struct kvm_device_attr attr; switch (ioctl) { case KVM_CREATE_IRQCHIP: { @@ -1479,6 +1496,18 @@ long kvm_arch_vm_ioctl(struct file *filp, return -EFAULT; return kvm_vm_ioctl_mte_copy_tags(kvm, ©_tags); } + case KVM_HAS_DEVICE_ATTR: { + if (copy_from_user(&attr, argp, sizeof(attr))) + return -EFAULT; + + return kvm_vm_has_attr(kvm, &attr); + } + case KVM_SET_DEVICE_ATTR: { + if (copy_from_user(&attr, argp, sizeof(attr))) + return -EFAULT; + + return kvm_vm_set_attr(kvm, &attr); + } default: return -EINVAL; } -- 2.40.0.rc1.284.g88254d51c5-goog