[PATCH] KVM: arm64: Clarify vcpu reset behaviour

[Marc Zyngier]

Although the KVM_ARM_VCPU_INIT documentation mention that the
registers are reset to their "initial values", it doesn't
describe what these values are.

Describe this state explicitly.

Signed-off-by: Marc Zyngier <maz at kernel.org>
---
 Documentation/virt/kvm/api.rst | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
index 38e327d4b479..e2237e4e10ba 100644
--- a/Documentation/virt/kvm/api.rst
+++ b/Documentation/virt/kvm/api.rst
@@ -3115,6 +3115,16 @@ optional features it should have.  This will cause a reset of the cpu
 registers to their initial values.  If this is not called, KVM_RUN will
 return ENOEXEC for that vcpu.
 
+The initial values are defined as:
+	- Processor state:
+		* AArch64: EL1h, D, A, I and F bits set
+		* Aarch32: SVC, D, A, I and F bits set
+	- General Purpose registers, including PC and SP: set to 0
+	- FPSIMD/NEON registers: set to 0
+	- SVE registers: set to 0
+	- System registers: Reset to their architecturally defined
+	  values as for a warm reset to EL1 (resp. SVC)
+
 Note that because some registers reflect machine topology, all vcpus
 should be created before this ioctl is invoked.
 
-- 
2.29.2