From: Oliver Upton <oliver.upton@linux.dev>
To: kvmarm@lists.linux.dev
Cc: kvm@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
Marc Zyngier <maz@kernel.org>, James Morse <james.morse@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>,
Sean Christopherson <seanjc@google.com>,
Salil Mehta <salil.mehta@huawei.com>,
Oliver Upton <oliver.upton@linux.dev>
Subject: [PATCH 03/11] KVM: arm64: Add vm fd device attribute accessors
Date: Mon, 20 Mar 2023 22:09:54 +0000 [thread overview]
Message-ID: <20230320221002.4191007-4-oliver.upton@linux.dev> (raw)
In-Reply-To: <20230320221002.4191007-1-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 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
next prev parent reply other threads:[~2023-03-20 22:10 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-20 22:09 [PATCH 00/11] KVM: arm64: Userspace SMCCC call filtering Oliver Upton
2023-03-20 22:09 ` [PATCH 01/11] KVM: x86: Redefine 'longmode' as a flag for KVM_EXIT_HYPERCALL Oliver Upton
2023-03-21 15:53 ` Sean Christopherson
2023-03-21 17:36 ` Oliver Upton
2023-03-20 22:09 ` [PATCH 02/11] KVM: arm64: Add a helper to check if a VM has ran once Oliver Upton
2023-03-21 9:42 ` Suzuki K Poulose
2023-03-21 16:29 ` Oliver Upton
2023-03-20 22:09 ` Oliver Upton [this message]
2023-03-21 9:53 ` [PATCH 03/11] KVM: arm64: Add vm fd device attribute accessors Suzuki K Poulose
2023-03-21 16:49 ` Oliver Upton
2023-03-28 8:39 ` Suzuki K Poulose
2023-03-28 8:40 ` Suzuki K Poulose
2023-03-20 22:09 ` [PATCH 04/11] KVM: arm64: Rename SMC/HVC call handler to reflect reality Oliver Upton
2023-03-21 9:52 ` Suzuki K Poulose
2023-03-28 8:40 ` Suzuki K Poulose
2023-03-20 22:09 ` [PATCH 05/11] KVM: arm64: Start handling SMCs from EL1 Oliver Upton
2023-03-28 8:52 ` Suzuki K Poulose
2023-03-28 14:15 ` Marc Zyngier
2023-03-20 22:09 ` [PATCH 06/11] KVM: arm64: Refactor hvc filtering to support different actions Oliver Upton
2023-03-28 9:19 ` Suzuki K Poulose
2023-03-20 22:09 ` [PATCH 07/11] KVM: arm64: Use a maple tree to represent the SMCCC filter Oliver Upton
2023-03-20 22:09 ` [PATCH 08/11] KVM: arm64: Add support for KVM_EXIT_HYPERCALL Oliver Upton
2023-03-20 22:10 ` [PATCH 09/11] KVM: arm64: Indroduce support for userspace SMCCC filtering Oliver Upton
2023-03-20 22:10 ` [PATCH 10/11] KVM: selftests: Add a helper for SMCCC calls with SMC instruction Oliver Upton
2023-03-20 22:10 ` [PATCH 11/11] KVM: selftests: Add test for SMCCC filter Oliver Upton
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