From: Scott Wood <scottwood@freescale.com>
To: Mihai Caraman <mihai.caraman@freescale.com>
Cc: Mihai Caraman <mihai.caraman@freescale.com>,
linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org,
kvm-ppc@vger.kernel.org
Subject: Re: [PATCH 5/7 v2] KVM: PPC: e500: Remove E.PT and E.HV.LRAT categories from VCPUs
Date: Wed, 27 Mar 2013 12:50:34 -0500 [thread overview]
Message-ID: <1364406634.31930.6@snotra> (raw)
In-Reply-To: <1364335512-28426-6-git-send-email-mihai.caraman@freescale.com> (from mihai.caraman@freescale.com on Tue Mar 26 17:05:10 2013)
On 03/26/2013 05:05:10 PM, Mihai Caraman wrote:
> Embedded.Page Table (E.PT) category in VMs requires indirect tlb =20
> entries
> emulation which is not supported yet. Configure TLBnCFG to remove E.PT
> and E.HV.LRAT categories from VCPUs.
>=20
> Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com>
> ---
> v2:
> - Remove E.HV.LRAT from vcpus
>=20
> arch/powerpc/kvm/e500_mmu.c | 6 ++++++
> 1 files changed, 6 insertions(+), 0 deletions(-)
>=20
> diff --git a/arch/powerpc/kvm/e500_mmu.c b/arch/powerpc/kvm/e500_mmu.c
> index cf60db1..0d2a293 100644
> --- a/arch/powerpc/kvm/e500_mmu.c
> +++ b/arch/powerpc/kvm/e500_mmu.c
> @@ -867,11 +867,17 @@ static int vcpu_mmu_init(struct kvm_vcpu *vcpu,
> vcpu->arch.tlbcfg[1] |=3D params[1].ways << TLBnCFG_ASSOC_SHIFT;
>=20
> if (has_feature(vcpu, VCPU_FTR_MMU_V2)) {
> + vcpu->arch.mmucfg &=3D ~MMUCFG_LRAT;
> +
> if (has_feature(vcpu, VCPU_FTR_E_PT))
> vcpu->arch.eptcfg =3D mfspr(SPRN_EPTCFG);
> else
> vcpu->arch.eptcfg =3D 0;
>=20
> + /* Guest mmu emulation currently doesn't handle E.PT */
> + vcpu->arch.tlbcfg[0] &=3D ~TLBnCFG_PT;
> + vcpu->arch.tlbcfg[1] &=3D ~TLBnCFG_IND;
You're clearing these bits *after* calling has_feature() -- doesn't =20
has_feature() depend on those bits being cleared to not advertise E_PT =20
support?
-Scott=
next prev parent reply other threads:[~2013-03-27 17:51 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-26 22:05 [PATCH 0/7 v2] KVM: PPC: e500: Enable FSL e6500 core Mihai Caraman
2013-03-26 22:05 ` [PATCH 1/7 v2] KVM: PPC: e500: Expose MMU registers via ONE_REG Mihai Caraman
2013-03-27 15:58 ` Alexander Graf
2013-03-26 22:05 ` [PATCH 2/7 v2] KVM: PPC: e500: Move vcpu's MMU configuration to dedicated functions Mihai Caraman
2013-03-26 22:05 ` [PATCH 3/7 v2] KVM: PPC: e500: Add support for TLBnPS registers Mihai Caraman
2013-03-26 22:48 ` Scott Wood
2013-03-26 22:05 ` [PATCH 4/7 v2] KVM: PPC: e500: Add support for EPTCFG register Mihai Caraman
2013-03-27 17:21 ` Alexander Graf
2013-03-26 22:05 ` [PATCH 5/7 v2] KVM: PPC: e500: Remove E.PT and E.HV.LRAT categories from VCPUs Mihai Caraman
2013-03-27 17:23 ` Alexander Graf
2013-03-27 17:50 ` Scott Wood [this message]
2013-03-26 22:05 ` [PATCH 6/7 v2] KVM: PPC: e500mc: Enable e6500 cores Mihai Caraman
2013-03-26 22:05 ` [PATCH 7/7 v2] KVM: PPC: e500: Add e6500 core to Kconfig description Mihai Caraman
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