From: Oliver Upton <oliver.upton@linux.dev>
To: Marc Zyngier <maz@kernel.org>
Cc: James Morse <james.morse@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
kvmarm@lists.linux.dev, Akihiko Odaki <akihiko.odaki@daynix.com>,
Zenghui Yu <yuzenghui@huawei.com>,
Raghavendra Rao Ananta <rananta@google.com>,
linux-arm-kernel@lists.infradead.org,
Salil Mehta <salil.mehta@huawei.com>,
Oliver Upton <oliver.upton@linux.dev>
Subject: [RFC PATCH v2 2/6] KVM: arm64: Add vm fd device attribute accessors
Date: Sat, 11 Feb 2023 01:37:55 +0000 [thread overview]
Message-ID: <20230211013759.3556016-3-oliver.upton@linux.dev> (raw)
In-Reply-To: <20230211013759.3556016-1-oliver.upton@linux.dev>
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 <oliver.upton@linux.dev>
---
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 9c5573bc4614..09efa893e03a 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1449,11 +1449,28 @@ 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: {
@@ -1489,6 +1506,18 @@ 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;
}
--
2.39.1.581.gbfd45094c4-goog
next prev parent reply other threads:[~2023-02-11 1:47 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-11 1:37 [RFC PATCH v2 0/6] KVM: arm64: Userspace SMCCC call filtering Oliver Upton
2023-02-11 1:37 ` [RFC PATCH v2 1/6] KVM: arm64: Add a helper to check if a VM has ran once Oliver Upton
2023-02-13 15:36 ` Sean Christopherson
2023-02-13 15:49 ` Marc Zyngier
2023-02-11 1:37 ` Oliver Upton [this message]
2023-02-11 1:37 ` [RFC PATCH v2 3/6] KVM: arm64: Refactor hvc filtering to support different actions Oliver Upton
2023-02-11 1:37 ` [RFC PATCH v2 4/6] KVM: arm64: Use a maple tree to represent the SMCCC filter Oliver Upton
2023-02-11 1:37 ` [RFC PATCH v2 5/6] KVM: arm64: Add support for KVM_EXIT_HYPERCALL Oliver Upton
2023-02-13 16:01 ` Sean Christopherson
2023-02-13 19:24 ` Oliver Upton
2023-02-24 15:12 ` James Morse
2023-02-24 21:42 ` Oliver Upton
2023-02-11 1:37 ` [RFC PATCH v2 6/6] KVM: arm64: Indroduce support for userspace SMCCC filtering Oliver Upton
2023-02-17 18:35 ` Oliver Upton
2023-02-24 15:12 ` [RFC PATCH v2 0/6] KVM: arm64: Userspace SMCCC call filtering James Morse
2023-02-24 21:32 ` Oliver Upton
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