[PATCH 12/19] KVM: PPC: Book3S HV: record guest queue page address
From: Cédric Le Goater <clg@kaod.org>
Date: 2019-01-07 18:57:20
Also in:
kvm
Subsystem:
kernel virtual machine for powerpc (kvm/powerpc), linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
The guest physical address of the event queue will be part of the state to transfer in the migration. Cache its value when the queue is configured, it will save us an OPAL call. Signed-off-by: Cédric Le Goater <clg@kaod.org> --- arch/powerpc/include/asm/xive.h | 2 ++ arch/powerpc/kvm/book3s_xive_native.c | 4 ++++ 2 files changed, 6 insertions(+)
diff --git a/arch/powerpc/include/asm/xive.h b/arch/powerpc/include/asm/xive.h
index 7a7aa22d8258..e90c3c5d9533 100644
--- a/arch/powerpc/include/asm/xive.h
+++ b/arch/powerpc/include/asm/xive.h@@ -74,6 +74,8 @@ struct xive_q { u32 esc_irq; atomic_t count; atomic_t pending_count; + u64 guest_qpage; + u32 guest_qsize; }; /* Global enable flags for the XIVE support */
diff --git a/arch/powerpc/kvm/book3s_xive_native.c b/arch/powerpc/kvm/book3s_xive_native.c
index 35d806740c3a..4ca75aade069 100644
--- a/arch/powerpc/kvm/book3s_xive_native.c
+++ b/arch/powerpc/kvm/book3s_xive_native.c@@ -708,6 +708,10 @@ static int kvmppc_h_int_set_queue_config(struct kvm_vcpu *vcpu, } qaddr = page_to_virt(page) + (qpage & ~PAGE_MASK); + /* Backup queue page address and size for migration */ + q->guest_qpage = qpage; + q->guest_qsize = qsize; + rc = xive_native_configure_queue(xc->vp_id, q, priority, (__be32 *) qaddr, qsize, true); if (rc) {
--
2.20.1