From 6ff887b8bd0d820d9f3371c0ce093d96b73035d6 Mon Sep 17 00:00:00 2001 From: Suraj Jitindar Singh Date: Fri, 14 Dec 2018 16:29:09 +1100 Subject: KVM: PPC: Book3S: Introduce new hcall H_COPY_TOFROM_GUEST to access quadrants 1 & 2 A guest cannot access quadrants 1 or 2 as this would result in an exception. Thus introduce the hcall H_COPY_TOFROM_GUEST to be used by a guest when it wants to perform an access to quadrants 1 or 2, for example when it wants to access memory for one of its nested guests. Also provide an implementation for the kvm-hv module. Signed-off-by: Suraj Jitindar Singh Signed-off-by: Paul Mackerras --- arch/powerpc/kvm/book3s_hv.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'arch/powerpc/kvm/book3s_hv.c') diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index ca7de15f4a70..5a066fc299e1 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -996,7 +996,11 @@ int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) if (nesting_enabled(vcpu->kvm)) ret = kvmhv_do_nested_tlbie(vcpu); break; - + case H_COPY_TOFROM_GUEST: + ret = H_FUNCTION; + if (nesting_enabled(vcpu->kvm)) + ret = kvmhv_copy_tofrom_guest_nested(vcpu); + break; default: return RESUME_HOST; } -- cgit v1.2.3