From 7aa10ba37e5c8be0094c9ce58cf5b84cca590292 Mon Sep 17 00:00:00 2001 From: Suraj Jitindar Singh Date: Mon, 8 Oct 2018 16:30:59 +1100 Subject: [PATCH] KVM: PPC: Book3S HV: Clear partition table entry on vm teardown When destroying a VM we return the LPID to the pool, however we never zero the partition table entry. This is instead done when we reallocate the LPID. Zero the partition table entry on VM teardown before returning the LPID to the pool. This means if we were running as a nested hypervisor the real hypervisor could use this to determine when it can free resources. Reviewed-by: David Gibson Signed-off-by: Suraj Jitindar Singh Signed-off-by: Paul Mackerras Signed-off-by: Michael Ellerman --- arch/powerpc/kvm/book3s_hv.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 3d99f4f410f98..8c20a90a68519 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -4509,13 +4509,19 @@ static void kvmppc_core_destroy_vm_hv(struct kvm *kvm) kvmppc_free_vcores(kvm); - kvmppc_free_lpid(kvm->arch.lpid); if (kvm_is_radix(kvm)) kvmppc_free_radix(kvm); else kvmppc_free_hpt(&kvm->arch.hpt); + /* Perform global invalidation and return lpid to the pool */ + if (cpu_has_feature(CPU_FTR_ARCH_300)) { + kvm->arch.process_table = 0; + kvmppc_setup_partition_table(kvm); + } + kvmppc_free_lpid(kvm->arch.lpid); + kvmppc_free_pimap(kvm); } -- 2.39.5