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authorMarc Zyngier <maz@kernel.org>2020-04-09 13:05:26 +0100
committerMarc Zyngier <maz@kernel.org>2020-04-23 16:26:31 +0100
commitba1ed9e17b581c9a204ec1d72d40472dd8557edd (patch)
treea0f2162a4222f19fbea3d2104042aa8910190aa7 /virt/kvm/arm/vgic/vgic-mmio.h
parent41ee52ecbcdc98eb2a03241923b1a7d46f476bb3 (diff)
downloadlinux-ba1ed9e17b581c9a204ec1d72d40472dd8557edd.tar.gz
KVM: arm: vgic-v2: Only use the virtual state when userspace accesses pending bits
There is no point in accessing the HW when writing to any of the ISPENDR/ICPENDR registers from userspace, as only the guest should be allowed to change the HW state. Introduce new userspace-specific accessors that deal solely with the virtual state. Note that the API differs from that of GICv3, where userspace exclusively uses ISPENDR to set the state. Too bad we can't reuse it. Fixes: 82e40f558de56 ("KVM: arm/arm64: vgic-v2: Handle SGI bits in GICD_I{S,C}PENDR0 as WI") Reviewed-by: James Morse <james.morse@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'virt/kvm/arm/vgic/vgic-mmio.h')
-rw-r--r--virt/kvm/arm/vgic/vgic-mmio.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/virt/kvm/arm/vgic/vgic-mmio.h b/virt/kvm/arm/vgic/vgic-mmio.h
index 327d0a6938e4..fefcca2b14dc 100644
--- a/virt/kvm/arm/vgic/vgic-mmio.h
+++ b/virt/kvm/arm/vgic/vgic-mmio.h
@@ -157,6 +157,14 @@ void vgic_mmio_write_cpending(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len,
unsigned long val);
+int vgic_uaccess_write_spending(struct kvm_vcpu *vcpu,
+ gpa_t addr, unsigned int len,
+ unsigned long val);
+
+int vgic_uaccess_write_cpending(struct kvm_vcpu *vcpu,
+ gpa_t addr, unsigned int len,
+ unsigned long val);
+
unsigned long vgic_mmio_read_active(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len);