From: Mihai Caraman <mihai.caraman@freescale.com>
To: <kvm-ppc@vger.kernel.org>
Cc: Mihai Caraman <mihai.caraman@freescale.com>,
linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org
Subject: [PATCH 2/7 v2] KVM: PPC: e500: Move vcpu's MMU configuration to dedicated functions
Date: Wed, 27 Mar 2013 00:05:07 +0200 [thread overview]
Message-ID: <1364335512-28426-3-git-send-email-mihai.caraman@freescale.com> (raw)
In-Reply-To: <1364335512-28426-1-git-send-email-mihai.caraman@freescale.com>
Vcpu's MMU default configuration and geometry update logic was buried in
a chunk of code. Move them to dedicated functions to add more clarity.
Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com>
---
v2:
- Add better patch description. Hopefully :)
arch/powerpc/kvm/e500_mmu.c | 60 +++++++++++++++++++++++++++---------------
1 files changed, 38 insertions(+), 22 deletions(-)
diff --git a/arch/powerpc/kvm/e500_mmu.c b/arch/powerpc/kvm/e500_mmu.c
index 68c2b00..7d6bb12 100644
--- a/arch/powerpc/kvm/e500_mmu.c
+++ b/arch/powerpc/kvm/e500_mmu.c
@@ -680,6 +680,20 @@ int kvmppc_set_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id,
return r;
}
+static int vcpu_mmu_geometry_update(struct kvm_vcpu *vcpu,
+ struct kvm_book3e_206_tlb_params *params)
+{
+ vcpu->arch.tlbcfg[0] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
+ if (params->tlb_sizes[0] <= 2048)
+ vcpu->arch.tlbcfg[0] |= params->tlb_sizes[0];
+ vcpu->arch.tlbcfg[0] |= params->tlb_ways[0] << TLBnCFG_ASSOC_SHIFT;
+
+ vcpu->arch.tlbcfg[1] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
+ vcpu->arch.tlbcfg[1] |= params->tlb_sizes[1];
+ vcpu->arch.tlbcfg[1] |= params->tlb_ways[1] << TLBnCFG_ASSOC_SHIFT;
+ return 0;
+}
+
int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu,
struct kvm_config_tlb *cfg)
{
@@ -776,16 +790,8 @@ int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu,
vcpu_e500->gtlb_offset[0] = 0;
vcpu_e500->gtlb_offset[1] = params.tlb_sizes[0];
- vcpu->arch.mmucfg = mfspr(SPRN_MMUCFG) & ~MMUCFG_LPIDSIZE;
-
- vcpu->arch.tlbcfg[0] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
- if (params.tlb_sizes[0] <= 2048)
- vcpu->arch.tlbcfg[0] |= params.tlb_sizes[0];
- vcpu->arch.tlbcfg[0] |= params.tlb_ways[0] << TLBnCFG_ASSOC_SHIFT;
-
- vcpu->arch.tlbcfg[1] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
- vcpu->arch.tlbcfg[1] |= params.tlb_sizes[1];
- vcpu->arch.tlbcfg[1] |= params.tlb_ways[1] << TLBnCFG_ASSOC_SHIFT;
+ /* Update vcpu's MMU geometry based on SW_TLB input */
+ vcpu_mmu_geometry_update(vcpu, ¶ms);
vcpu_e500->shared_tlb_pages = pages;
vcpu_e500->num_shared_tlb_pages = num_pages;
@@ -821,6 +827,27 @@ int kvm_vcpu_ioctl_dirty_tlb(struct kvm_vcpu *vcpu,
return 0;
}
+/* Vcpu's MMU default configuration */
+static int vcpu_mmu_init(struct kvm_vcpu *vcpu,
+ struct kvmppc_e500_tlb_params *params)
+{
+ /* Initialize RASIZE, PIDSIZE, NTLBS and MAVN fields with host values*/
+ vcpu->arch.mmucfg = mfspr(SPRN_MMUCFG) & ~MMUCFG_LPIDSIZE;
+
+ /* Initialize TLBnCFG fields with host values and SW_TLB geometry*/
+ vcpu->arch.tlbcfg[0] = mfspr(SPRN_TLB0CFG) &
+ ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
+ vcpu->arch.tlbcfg[0] |= params[0].entries;
+ vcpu->arch.tlbcfg[0] |= params[0].ways << TLBnCFG_ASSOC_SHIFT;
+
+ vcpu->arch.tlbcfg[1] = mfspr(SPRN_TLB1CFG) &
+ ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
+ vcpu->arch.tlbcfg[1] |= params[1].entries;
+ vcpu->arch.tlbcfg[1] |= params[1].ways << TLBnCFG_ASSOC_SHIFT;
+
+ return 0;
+}
+
int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500)
{
struct kvm_vcpu *vcpu = &vcpu_e500->vcpu;
@@ -865,18 +892,7 @@ int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500)
if (!vcpu_e500->g2h_tlb1_map)
goto err;
- /* Init TLB configuration register */
- vcpu->arch.tlbcfg[0] = mfspr(SPRN_TLB0CFG) &
- ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
- vcpu->arch.tlbcfg[0] |= vcpu_e500->gtlb_params[0].entries;
- vcpu->arch.tlbcfg[0] |=
- vcpu_e500->gtlb_params[0].ways << TLBnCFG_ASSOC_SHIFT;
-
- vcpu->arch.tlbcfg[1] = mfspr(SPRN_TLB1CFG) &
- ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
- vcpu->arch.tlbcfg[1] |= vcpu_e500->gtlb_params[1].entries;
- vcpu->arch.tlbcfg[1] |=
- vcpu_e500->gtlb_params[1].ways << TLBnCFG_ASSOC_SHIFT;
+ vcpu_mmu_init(vcpu, vcpu_e500->gtlb_params);
kvmppc_recalc_tlb1map_range(vcpu_e500);
return 0;
--
1.7.4.1
next prev parent reply other threads:[~2013-03-26 22:06 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 ` Mihai Caraman [this message]
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
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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