KVM: SEV: Make it more obvious when KVM is writing back the current PSC index

KVM: SEV: Make it more obvious when KVM is writing back the current PSC index

Increment the guest-visible "cur_entry" index outside of the for-loop
when processing Page State Change entries, and add a comment to make it
more obvious which code is operating on trusted data, and which code is
touching guest-accessible data.

No functional change intended.

Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20260501202250.2115252-12-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20260529183549.1104619-12-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>