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| author | Marc Zyngier <maz@kernel.org> | 2022-07-04 10:07:44 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-07-17 13:55:33 +0300 |
| commit | db25081e147c3cc496b8cd8c9d67f992546df6d5 (patch) | |
| tree | 652a47469902ee86f6bc1f433b560cdb56843475 /arch/arm64/kvm/vgic | |
| parent | b61fc0857a3ad4cdee44128ad13685033e237367 (diff) | |
| download | linux-db25081e147c3cc496b8cd8c9d67f992546df6d5.tar.xz | |
KVM: arm64: vgic-v3: Push user access into vgic_v3_cpu_sysregs_uaccess()
In order to start making the vgic sysreg access from userspace
similar to all the other sysregs, push the userspace memory
access one level down into vgic_v3_cpu_sysregs_uaccess().
The next step will be to rely on the sysreg infrastructure
to perform this task.
Reviewed-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'arch/arm64/kvm/vgic')
| -rw-r--r-- | arch/arm64/kvm/vgic/vgic-kvm-device.c | 33 | ||||
| -rw-r--r-- | arch/arm64/kvm/vgic/vgic.h | 4 |
2 files changed, 9 insertions, 28 deletions
diff --git a/arch/arm64/kvm/vgic/vgic-kvm-device.c b/arch/arm64/kvm/vgic/vgic-kvm-device.c index c6d52a1fd9c8..bf745c6ab2ea 100644 --- a/arch/arm64/kvm/vgic/vgic-kvm-device.c +++ b/arch/arm64/kvm/vgic/vgic-kvm-device.c @@ -512,7 +512,7 @@ int vgic_v3_parse_attr(struct kvm_device *dev, struct kvm_device_attr *attr, * * @dev: kvm device handle * @attr: kvm device attribute - * @reg: address the value is read or written + * @reg: address the value is read or written, NULL for sysregs * @is_write: true if userspace is writing a register */ static int vgic_v3_attr_regs_access(struct kvm_device *dev, @@ -561,14 +561,9 @@ static int vgic_v3_attr_regs_access(struct kvm_device *dev, if (!is_write) *reg = tmp32; break; - case KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS: { - u64 regid; - - regid = (attr->attr & KVM_DEV_ARM_VGIC_SYSREG_INSTR_MASK); - ret = vgic_v3_cpu_sysregs_uaccess(vcpu, is_write, - regid, reg); + case KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS: + ret = vgic_v3_cpu_sysregs_uaccess(vcpu, attr, is_write); break; - } case KVM_DEV_ARM_VGIC_GRP_LEVEL_INFO: { unsigned int info, intid; @@ -617,15 +612,8 @@ static int vgic_v3_set_attr(struct kvm_device *dev, reg = tmp32; return vgic_v3_attr_regs_access(dev, attr, ®, true); } - case KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS: { - u64 __user *uaddr = (u64 __user *)(long)attr->addr; - u64 reg; - - if (get_user(reg, uaddr)) - return -EFAULT; - - return vgic_v3_attr_regs_access(dev, attr, ®, true); - } + case KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS: + return vgic_v3_attr_regs_access(dev, attr, NULL, true); case KVM_DEV_ARM_VGIC_GRP_LEVEL_INFO: { u32 __user *uaddr = (u32 __user *)(long)attr->addr; u64 reg; @@ -681,15 +669,8 @@ static int vgic_v3_get_attr(struct kvm_device *dev, tmp32 = reg; return put_user(tmp32, uaddr); } - case KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS: { - u64 __user *uaddr = (u64 __user *)(long)attr->addr; - u64 reg; - - ret = vgic_v3_attr_regs_access(dev, attr, ®, false); - if (ret) - return ret; - return put_user(reg, uaddr); - } + case KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS: + return vgic_v3_attr_regs_access(dev, attr, NULL, false); case KVM_DEV_ARM_VGIC_GRP_LEVEL_INFO: { u32 __user *uaddr = (u32 __user *)(long)attr->addr; u64 reg; diff --git a/arch/arm64/kvm/vgic/vgic.h b/arch/arm64/kvm/vgic/vgic.h index ffc2d3c81b28..c23118467a35 100644 --- a/arch/arm64/kvm/vgic/vgic.h +++ b/arch/arm64/kvm/vgic/vgic.h @@ -245,8 +245,8 @@ int vgic_v3_dist_uaccess(struct kvm_vcpu *vcpu, bool is_write, int offset, u32 *val); int vgic_v3_redist_uaccess(struct kvm_vcpu *vcpu, bool is_write, int offset, u32 *val); -int vgic_v3_cpu_sysregs_uaccess(struct kvm_vcpu *vcpu, bool is_write, - u64 id, u64 *val); +int vgic_v3_cpu_sysregs_uaccess(struct kvm_vcpu *vcpu, + struct kvm_device_attr *attr, bool is_write); int vgic_v3_has_cpu_sysregs_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr); int vgic_v3_line_level_info_uaccess(struct kvm_vcpu *vcpu, bool is_write, u32 intid, u64 *val); |