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[v3,5/5] KVM: PPC: Book3S HV: migrate hot plugged memory

Message ID 1594458827-31866-6-git-send-email-linuxram@us.ibm.com
State Superseded
Headers show
Series Migrate non-migrated pages of a SVM. | expand

Commit Message

Ram Pai July 11, 2020, 9:13 a.m. UTC 
From: Laurent Dufour <ldufour@linux.ibm.com>

When a memory slot is hot plugged to a SVM, PFNs associated with the
GFNs in that slot must be migrated to the secure-PFNs, aka device-PFNs.

kvmppc_uv_migrate_mem_slot() is called to accomplish this. UV_PAGE_IN
ucall is skipped, since the ultravisor does not trust the content of
those pages and hence ignores it.

Signed-off-by: Laurent Dufour <ldufour@linux.ibm.com>
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
	[resolved conflicts, and modified the commit log]
---
 arch/powerpc/kvm/book3s_hv.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)
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Patch

diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 819f96d..b0d4231 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -4523,10 +4523,12 @@  static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm,
 	case KVM_MR_CREATE:
 		if (kvmppc_uvmem_slot_init(kvm, new))
 			return;
-		uv_register_mem_slot(kvm->arch.lpid,
-				     new->base_gfn << PAGE_SHIFT,
-				     new->npages * PAGE_SIZE,
-				     0, new->id);
+		if (uv_register_mem_slot(kvm->arch.lpid,
+					 new->base_gfn << PAGE_SHIFT,
+					 new->npages * PAGE_SIZE,
+					 0, new->id))
+			return;
+		kvmppc_uv_migrate_mem_slot(kvm, new);
 		break;
 	case KVM_MR_DELETE:
 		uv_unregister_mem_slot(kvm->arch.lpid, old->id);