linux-kernel - [RFC PATCH v4 11/39] KVM: arm64: Allow userspace to lock and unlock memslots

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Message-Id: <20210825161815.266051-12-alexandru.elisei@arm.com>
Date:   Wed, 25 Aug 2021 17:17:47 +0100
From:   Alexandru Elisei <alexandru.elisei@....com>
To:     maz@...nel.org, james.morse@....com, suzuki.poulose@....com,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        will@...nel.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH v4 11/39] KVM: arm64: Allow userspace to lock and unlock memslots

The ioctls have been implemented, allow the userspace to lock and unlock
memslots.

Signed-off-by: Alexandru Elisei <alexandru.elisei@....com>
---
 arch/arm64/kvm/arm.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index c47e96ae4f7c..4bd4b8b082a4 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -80,11 +80,6 @@ int kvm_arch_check_processor_compat(void *opaque)
 	return 0;
 }
 
-static int kvm_arm_lock_memslot_supported(void)
-{
-	return 0;
-}
-
 static int kvm_lock_user_memory_region_ioctl(struct kvm *kvm,
 					     struct kvm_enable_cap *cap)
 {
@@ -127,8 +122,6 @@ int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
 		kvm->arch.mte_enabled = true;
 		break;
 	case KVM_CAP_ARM_LOCK_USER_MEMORY_REGION:
-		if (!kvm_arm_lock_memslot_supported())
-			return -EINVAL;
 		r = kvm_lock_user_memory_region_ioctl(kvm, cap);
 		break;
 	default:
@@ -306,7 +299,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 		r = system_has_full_ptr_auth();
 		break;
 	case KVM_CAP_ARM_LOCK_USER_MEMORY_REGION:
-		r = kvm_arm_lock_memslot_supported();
+		r = 1;
 		break;
 	default:
 		r = 0;
-- 
2.33.0