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From: David Gibson <david@gibson.dropbear.id.au>
To: paulus@samba.org
Cc: michael@ellerman.id.au, benh@kernel.crashing.org,
	sjitindarsingh@gmail.com, thuth@redhat.com, lvivier@redhat.com,
	linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org, David Gibson <david@gibson.dropbear.id.au>
Subject: [PATCH 11/11] powerpc/kvm: Advertise availablity of HPT resizing on KVM HV
Date: Thu, 15 Dec 2016 16:54:04 +1100	[thread overview]
Message-ID: <20161215055404.29351-12-david@gibson.dropbear.id.au> (raw)
In-Reply-To: <20161215055404.29351-1-david@gibson.dropbear.id.au>

This updates the KVM_CAP_SPAPR_RESIZE_HPT capability to advertise the
presence of in-kernel HPT resizing on KVM HV.  In fact the HPT resizing
isn't fully implemented, but this allows us to experiment with what's
there.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 arch/powerpc/kvm/powerpc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index bb23923..965d26b 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -606,7 +606,10 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 		r = 1;
 		break;
 	case KVM_CAP_SPAPR_RESIZE_HPT:
-		r = 1; /* resize allowed only if HPT is outside kernel */
+		if (hv_enabled)
+			r = 2; /* In-kernel resize implementation */
+		else
+			r = 1; /* outside kernel resize allowed */
 		break;
 #endif
 	case KVM_CAP_PPC_HTM:
-- 
2.9.3

      parent reply	other threads:[~2016-12-15  5:58 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-12-15  5:53 [PATCH 00/11] KVM implementation of PAPR HPT resizing extension David Gibson
2016-12-15  5:53 ` [PATCH 01/11] powerpc/kvm: Reserve capabilities and ioctls for HPT resizing David Gibson
2016-12-16  9:25   ` Thomas Huth
2016-12-19  6:36     ` David Gibson
2016-12-16 13:15   ` Thomas Huth
2016-12-19  6:37     ` David Gibson
2016-12-15  5:53 ` [PATCH 02/11] powerpc/kvm: Rename kvm_alloc_hpt() for clarity David Gibson
2016-12-16  9:03   ` Thomas Huth
2016-12-15  5:53 ` [PATCH 03/11] powerpc/kvm: Gather HPT related variables into sub-structure David Gibson
2016-12-16  9:24   ` Thomas Huth
2016-12-19  0:03     ` David Gibson
2016-12-15  5:53 ` [PATCH 04/11] powerpc/kvm: Don't store values derivable from HPT order David Gibson
2016-12-16 10:39   ` Thomas Huth
2016-12-19  0:04     ` David Gibson
2016-12-15  5:53 ` [PATCH 05/11] powerpc/kvm: Split HPT allocation from activation David Gibson
2016-12-16 11:57   ` Thomas Huth
2016-12-19  0:24     ` David Gibson
2016-12-15  5:53 ` [PATCH 06/11] powerpc/kvm: Allow KVM_PPC_ALLOCATE_HTAB ioctl() to change HPT size David Gibson
2016-12-16 12:44   ` Thomas Huth
2016-12-19  0:48     ` David Gibson
2016-12-19  7:49       ` Thomas Huth
2016-12-19 23:16         ` David Gibson
2016-12-15  5:54 ` [PATCH 07/11] powerpc/kvm: Create kvmppc_unmap_hpte_helper() David Gibson
2016-12-16 12:48   ` Thomas Huth
2016-12-15  5:54 ` [PATCH 08/11] powerpc/kvm: KVM-HV HPT resizing stub implementation David Gibson
2016-12-16 15:35   ` Thomas Huth
2016-12-15  5:54 ` [PATCH 09/11] powerpc/kvm: Outline of KVM-HV HPT resizing implementation David Gibson
2016-12-15  5:54 ` [PATCH 10/11] powerpc/kvm: " David Gibson
2016-12-15  5:54 ` David Gibson [this message]

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