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authorAmit Daniel Kachhap <amit.kachhap@arm.com>2019-04-23 10:12:36 +0530
committerMarc Zyngier <marc.zyngier@arm.com>2019-04-24 15:30:40 +0100
commita22fa321d13b0264976cbbc1d22f4c27c41d3642 (patch)
tree1f68397998eccf792fa7452d89a00ed6e6350488 /Documentation/virtual
parent384b40caa8afae44a54e8f69bd37097c0279fdce (diff)
downloadlinux-a22fa321d13b0264976cbbc1d22f4c27c41d3642.tar.bz2
KVM: arm64: Add userspace flag to enable pointer authentication
Now that the building blocks of pointer authentication are present, lets add userspace flags KVM_ARM_VCPU_PTRAUTH_ADDRESS and KVM_ARM_VCPU_PTRAUTH_GENERIC. These flags will enable pointer authentication for the KVM guest on a per-vcpu basis through the ioctl KVM_ARM_VCPU_INIT. This features will allow the KVM guest to allow the handling of pointer authentication instructions or to treat them as undefined if not set. Necessary documentations are added to reflect the changes done. Reviewed-by: Dave Martin <Dave.Martin@arm.com> Signed-off-by: Amit Daniel Kachhap <amit.kachhap@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Christoffer Dall <christoffer.dall@arm.com> Cc: kvmarm@lists.cs.columbia.edu Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'Documentation/virtual')
-rw-r--r--Documentation/virtual/kvm/api.txt10
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index e410a9f0f0d4..32afe7f5c35a 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -2761,6 +2761,16 @@ Possible features:
- KVM_ARM_VCPU_PMU_V3: Emulate PMUv3 for the CPU.
Depends on KVM_CAP_ARM_PMU_V3.
+ - KVM_ARM_VCPU_PTRAUTH_ADDRESS: Enables Address Pointer authentication
+ for arm64 only.
+ Both KVM_ARM_VCPU_PTRAUTH_ADDRESS and KVM_ARM_VCPU_PTRAUTH_GENERIC
+ must be requested or neither must be requested.
+
+ - KVM_ARM_VCPU_PTRAUTH_GENERIC: Enables Generic Pointer authentication
+ for arm64 only.
+ Both KVM_ARM_VCPU_PTRAUTH_ADDRESS and KVM_ARM_VCPU_PTRAUTH_GENERIC
+ must be requested or neither must be requested.
+
- KVM_ARM_VCPU_SVE: Enables SVE for the CPU (arm64 only).
Depends on KVM_CAP_ARM_SVE.
Requires KVM_ARM_VCPU_FINALIZE(KVM_ARM_VCPU_SVE):