From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.ru (unknown [107.173.13.209]) by lists.ozlabs.org (Postfix) with ESMTP id 4281SY359nzF3F7 for ; Mon, 10 Sep 2018 18:30:05 +1000 (AEST) From: Alexey Kardashevskiy To: linuxppc-dev@lists.ozlabs.org Cc: Alexey Kardashevskiy , David Gibson , kvm-ppc@vger.kernel.org, "Aneesh Kumar K.V" , Paul Mackerras , Alex Williamson Subject: [PATCH kernel v2 6/6] KVM: PPC: Remove redundand permission bits removal Date: Mon, 10 Sep 2018 18:29:12 +1000 Message-Id: <20180910082912.13255-7-aik@ozlabs.ru> In-Reply-To: <20180910082912.13255-1-aik@ozlabs.ru> References: <20180910082912.13255-1-aik@ozlabs.ru> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , The kvmppc_gpa_to_ua() helper itself takes care of the permission bits in the TCE and yet every single caller removes them. This changes semantics of kvmppc_gpa_to_ua() so it takes TCEs (which are GPAs + TCE permission bits) to make the callers simpler. This should cause no behavioural change. Signed-off-by: Alexey Kardashevskiy --- Changes: v2: * %s/kvmppc_gpa_to_ua/kvmppc_tce_to_ua/g --- arch/powerpc/include/asm/kvm_ppc.h | 2 +- arch/powerpc/kvm/book3s_64_vio.c | 12 ++++-------- arch/powerpc/kvm/book3s_64_vio_hv.c | 22 +++++++++------------- 3 files changed, 14 insertions(+), 22 deletions(-) diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index 2f5d431..38d0328 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -194,7 +194,7 @@ extern struct kvmppc_spapr_tce_table *kvmppc_find_table( (iommu_tce_check_ioba((stt)->page_shift, (stt)->offset, \ (stt)->size, (ioba), (npages)) ? \ H_PARAMETER : H_SUCCESS) -extern long kvmppc_gpa_to_ua(struct kvm *kvm, unsigned long gpa, +extern long kvmppc_tce_to_ua(struct kvm *kvm, unsigned long tce, unsigned long *ua, unsigned long **prmap); extern void kvmppc_tce_put(struct kvmppc_spapr_tce_table *tt, unsigned long idx, unsigned long tce); diff --git a/arch/powerpc/kvm/book3s_64_vio.c b/arch/powerpc/kvm/book3s_64_vio.c index 8231b17..c0c64d1 100644 --- a/arch/powerpc/kvm/book3s_64_vio.c +++ b/arch/powerpc/kvm/book3s_64_vio.c @@ -378,8 +378,7 @@ static long kvmppc_tce_validate(struct kvmppc_spapr_tce_table *stt, if (iommu_tce_check_gpa(stt->page_shift, gpa)) return H_TOO_HARD; - if (kvmppc_gpa_to_ua(stt->kvm, tce & ~(TCE_PCI_READ | TCE_PCI_WRITE), - &ua, NULL)) + if (kvmppc_tce_to_ua(stt->kvm, tce, &ua, NULL)) return H_TOO_HARD; list_for_each_entry_rcu(stit, &stt->iommu_tables, next) { @@ -552,8 +551,7 @@ long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn, idx = srcu_read_lock(&vcpu->kvm->srcu); - if ((dir != DMA_NONE) && kvmppc_gpa_to_ua(vcpu->kvm, - tce & ~(TCE_PCI_READ | TCE_PCI_WRITE), &ua, NULL)) { + if ((dir != DMA_NONE) && kvmppc_tce_to_ua(vcpu->kvm, tce, &ua, NULL)) { ret = H_PARAMETER; goto unlock_exit; } @@ -614,7 +612,7 @@ long kvmppc_h_put_tce_indirect(struct kvm_vcpu *vcpu, return ret; idx = srcu_read_lock(&vcpu->kvm->srcu); - if (kvmppc_gpa_to_ua(vcpu->kvm, tce_list, &ua, NULL)) { + if (kvmppc_tce_to_ua(vcpu->kvm, tce_list, &ua, NULL)) { ret = H_TOO_HARD; goto unlock_exit; } @@ -649,9 +647,7 @@ long kvmppc_h_put_tce_indirect(struct kvm_vcpu *vcpu, } tce = be64_to_cpu(tce); - if (kvmppc_gpa_to_ua(vcpu->kvm, - tce & ~(TCE_PCI_READ | TCE_PCI_WRITE), - &ua, NULL)) + if (kvmppc_tce_to_ua(vcpu->kvm, tce, &ua, NULL)) return H_PARAMETER; list_for_each_entry_lockless(stit, &stt->iommu_tables, next) { diff --git a/arch/powerpc/kvm/book3s_64_vio_hv.c b/arch/powerpc/kvm/book3s_64_vio_hv.c index adf3b21..389dac1 100644 --- a/arch/powerpc/kvm/book3s_64_vio_hv.c +++ b/arch/powerpc/kvm/book3s_64_vio_hv.c @@ -110,8 +110,7 @@ static long kvmppc_rm_tce_validate(struct kvmppc_spapr_tce_table *stt, if (iommu_tce_check_gpa(stt->page_shift, gpa)) return H_PARAMETER; - if (kvmppc_gpa_to_ua(stt->kvm, tce & ~(TCE_PCI_READ | TCE_PCI_WRITE), - &ua, NULL)) + if (kvmppc_tce_to_ua(stt->kvm, tce, &ua, NULL)) return H_TOO_HARD; list_for_each_entry_lockless(stit, &stt->iommu_tables, next) { @@ -180,10 +179,10 @@ void kvmppc_tce_put(struct kvmppc_spapr_tce_table *stt, } EXPORT_SYMBOL_GPL(kvmppc_tce_put); -long kvmppc_gpa_to_ua(struct kvm *kvm, unsigned long gpa, +long kvmppc_tce_to_ua(struct kvm *kvm, unsigned long tce, unsigned long *ua, unsigned long **prmap) { - unsigned long gfn = gpa >> PAGE_SHIFT; + unsigned long gfn = tce >> PAGE_SHIFT; struct kvm_memory_slot *memslot; memslot = search_memslots(kvm_memslots(kvm), gfn); @@ -191,7 +190,7 @@ long kvmppc_gpa_to_ua(struct kvm *kvm, unsigned long gpa, return -EINVAL; *ua = __gfn_to_hva_memslot(memslot, gfn) | - (gpa & ~(PAGE_MASK | TCE_PCI_READ | TCE_PCI_WRITE)); + (tce & ~(PAGE_MASK | TCE_PCI_READ | TCE_PCI_WRITE)); #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE if (prmap) @@ -200,7 +199,7 @@ long kvmppc_gpa_to_ua(struct kvm *kvm, unsigned long gpa, return 0; } -EXPORT_SYMBOL_GPL(kvmppc_gpa_to_ua); +EXPORT_SYMBOL_GPL(kvmppc_tce_to_ua); #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE static long iommu_tce_xchg_rm(struct mm_struct *mm, struct iommu_table *tbl, @@ -389,8 +388,7 @@ long kvmppc_rm_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn, return ret; dir = iommu_tce_direction(tce); - if ((dir != DMA_NONE) && kvmppc_gpa_to_ua(vcpu->kvm, - tce & ~(TCE_PCI_READ | TCE_PCI_WRITE), &ua, NULL)) + if ((dir != DMA_NONE) && kvmppc_tce_to_ua(vcpu->kvm, tce, &ua, NULL)) return H_PARAMETER; entry = ioba >> stt->page_shift; @@ -492,7 +490,7 @@ long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu, */ struct mm_iommu_table_group_mem_t *mem; - if (kvmppc_gpa_to_ua(vcpu->kvm, tce_list, &ua, NULL)) + if (kvmppc_tce_to_ua(vcpu->kvm, tce_list, &ua, NULL)) return H_TOO_HARD; mem = mm_iommu_lookup_rm(vcpu->kvm->mm, ua, IOMMU_PAGE_SIZE_4K); @@ -508,7 +506,7 @@ long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu, * We do not require memory to be preregistered in this case * so lock rmap and do __find_linux_pte_or_hugepte(). */ - if (kvmppc_gpa_to_ua(vcpu->kvm, tce_list, &ua, &rmap)) + if (kvmppc_tce_to_ua(vcpu->kvm, tce_list, &ua, &rmap)) return H_TOO_HARD; rmap = (void *) vmalloc_to_phys(rmap); @@ -542,9 +540,7 @@ long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu, unsigned long tce = be64_to_cpu(((u64 *)tces)[i]); ua = 0; - if (kvmppc_gpa_to_ua(vcpu->kvm, - tce & ~(TCE_PCI_READ | TCE_PCI_WRITE), - &ua, NULL)) + if (kvmppc_tce_to_ua(vcpu->kvm, tce, &ua, NULL)) return H_PARAMETER; list_for_each_entry_lockless(stit, &stt->iommu_tables, next) { -- 2.11.0 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexey Kardashevskiy Date: Mon, 10 Sep 2018 08:29:12 +0000 Subject: [PATCH kernel v2 6/6] KVM: PPC: Remove redundand permission bits removal Message-Id: <20180910082912.13255-7-aik@ozlabs.ru> List-Id: References: <20180910082912.13255-1-aik@ozlabs.ru> In-Reply-To: <20180910082912.13255-1-aik@ozlabs.ru> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linuxppc-dev@lists.ozlabs.org Cc: Alexey Kardashevskiy , David Gibson , kvm-ppc@vger.kernel.org, "Aneesh Kumar K.V" , Paul Mackerras , Alex Williamson The kvmppc_gpa_to_ua() helper itself takes care of the permission bits in the TCE and yet every single caller removes them. This changes semantics of kvmppc_gpa_to_ua() so it takes TCEs (which are GPAs + TCE permission bits) to make the callers simpler. This should cause no behavioural change. Signed-off-by: Alexey Kardashevskiy --- Changes: v2: * %s/kvmppc_gpa_to_ua/kvmppc_tce_to_ua/g --- arch/powerpc/include/asm/kvm_ppc.h | 2 +- arch/powerpc/kvm/book3s_64_vio.c | 12 ++++-------- arch/powerpc/kvm/book3s_64_vio_hv.c | 22 +++++++++------------- 3 files changed, 14 insertions(+), 22 deletions(-) diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index 2f5d431..38d0328 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -194,7 +194,7 @@ extern struct kvmppc_spapr_tce_table *kvmppc_find_table( (iommu_tce_check_ioba((stt)->page_shift, (stt)->offset, \ (stt)->size, (ioba), (npages)) ? \ H_PARAMETER : H_SUCCESS) -extern long kvmppc_gpa_to_ua(struct kvm *kvm, unsigned long gpa, +extern long kvmppc_tce_to_ua(struct kvm *kvm, unsigned long tce, unsigned long *ua, unsigned long **prmap); extern void kvmppc_tce_put(struct kvmppc_spapr_tce_table *tt, unsigned long idx, unsigned long tce); diff --git a/arch/powerpc/kvm/book3s_64_vio.c b/arch/powerpc/kvm/book3s_64_vio.c index 8231b17..c0c64d1 100644 --- a/arch/powerpc/kvm/book3s_64_vio.c +++ b/arch/powerpc/kvm/book3s_64_vio.c @@ -378,8 +378,7 @@ static long kvmppc_tce_validate(struct kvmppc_spapr_tce_table *stt, if (iommu_tce_check_gpa(stt->page_shift, gpa)) return H_TOO_HARD; - if (kvmppc_gpa_to_ua(stt->kvm, tce & ~(TCE_PCI_READ | TCE_PCI_WRITE), - &ua, NULL)) + if (kvmppc_tce_to_ua(stt->kvm, tce, &ua, NULL)) return H_TOO_HARD; list_for_each_entry_rcu(stit, &stt->iommu_tables, next) { @@ -552,8 +551,7 @@ long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn, idx = srcu_read_lock(&vcpu->kvm->srcu); - if ((dir != DMA_NONE) && kvmppc_gpa_to_ua(vcpu->kvm, - tce & ~(TCE_PCI_READ | TCE_PCI_WRITE), &ua, NULL)) { + if ((dir != DMA_NONE) && kvmppc_tce_to_ua(vcpu->kvm, tce, &ua, NULL)) { ret = H_PARAMETER; goto unlock_exit; } @@ -614,7 +612,7 @@ long kvmppc_h_put_tce_indirect(struct kvm_vcpu *vcpu, return ret; idx = srcu_read_lock(&vcpu->kvm->srcu); - if (kvmppc_gpa_to_ua(vcpu->kvm, tce_list, &ua, NULL)) { + if (kvmppc_tce_to_ua(vcpu->kvm, tce_list, &ua, NULL)) { ret = H_TOO_HARD; goto unlock_exit; } @@ -649,9 +647,7 @@ long kvmppc_h_put_tce_indirect(struct kvm_vcpu *vcpu, } tce = be64_to_cpu(tce); - if (kvmppc_gpa_to_ua(vcpu->kvm, - tce & ~(TCE_PCI_READ | TCE_PCI_WRITE), - &ua, NULL)) + if (kvmppc_tce_to_ua(vcpu->kvm, tce, &ua, NULL)) return H_PARAMETER; list_for_each_entry_lockless(stit, &stt->iommu_tables, next) { diff --git a/arch/powerpc/kvm/book3s_64_vio_hv.c b/arch/powerpc/kvm/book3s_64_vio_hv.c index adf3b21..389dac1 100644 --- a/arch/powerpc/kvm/book3s_64_vio_hv.c +++ b/arch/powerpc/kvm/book3s_64_vio_hv.c @@ -110,8 +110,7 @@ static long kvmppc_rm_tce_validate(struct kvmppc_spapr_tce_table *stt, if (iommu_tce_check_gpa(stt->page_shift, gpa)) return H_PARAMETER; - if (kvmppc_gpa_to_ua(stt->kvm, tce & ~(TCE_PCI_READ | TCE_PCI_WRITE), - &ua, NULL)) + if (kvmppc_tce_to_ua(stt->kvm, tce, &ua, NULL)) return H_TOO_HARD; list_for_each_entry_lockless(stit, &stt->iommu_tables, next) { @@ -180,10 +179,10 @@ void kvmppc_tce_put(struct kvmppc_spapr_tce_table *stt, } EXPORT_SYMBOL_GPL(kvmppc_tce_put); -long kvmppc_gpa_to_ua(struct kvm *kvm, unsigned long gpa, +long kvmppc_tce_to_ua(struct kvm *kvm, unsigned long tce, unsigned long *ua, unsigned long **prmap) { - unsigned long gfn = gpa >> PAGE_SHIFT; + unsigned long gfn = tce >> PAGE_SHIFT; struct kvm_memory_slot *memslot; memslot = search_memslots(kvm_memslots(kvm), gfn); @@ -191,7 +190,7 @@ long kvmppc_gpa_to_ua(struct kvm *kvm, unsigned long gpa, return -EINVAL; *ua = __gfn_to_hva_memslot(memslot, gfn) | - (gpa & ~(PAGE_MASK | TCE_PCI_READ | TCE_PCI_WRITE)); + (tce & ~(PAGE_MASK | TCE_PCI_READ | TCE_PCI_WRITE)); #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE if (prmap) @@ -200,7 +199,7 @@ long kvmppc_gpa_to_ua(struct kvm *kvm, unsigned long gpa, return 0; } -EXPORT_SYMBOL_GPL(kvmppc_gpa_to_ua); +EXPORT_SYMBOL_GPL(kvmppc_tce_to_ua); #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE static long iommu_tce_xchg_rm(struct mm_struct *mm, struct iommu_table *tbl, @@ -389,8 +388,7 @@ long kvmppc_rm_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn, return ret; dir = iommu_tce_direction(tce); - if ((dir != DMA_NONE) && kvmppc_gpa_to_ua(vcpu->kvm, - tce & ~(TCE_PCI_READ | TCE_PCI_WRITE), &ua, NULL)) + if ((dir != DMA_NONE) && kvmppc_tce_to_ua(vcpu->kvm, tce, &ua, NULL)) return H_PARAMETER; entry = ioba >> stt->page_shift; @@ -492,7 +490,7 @@ long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu, */ struct mm_iommu_table_group_mem_t *mem; - if (kvmppc_gpa_to_ua(vcpu->kvm, tce_list, &ua, NULL)) + if (kvmppc_tce_to_ua(vcpu->kvm, tce_list, &ua, NULL)) return H_TOO_HARD; mem = mm_iommu_lookup_rm(vcpu->kvm->mm, ua, IOMMU_PAGE_SIZE_4K); @@ -508,7 +506,7 @@ long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu, * We do not require memory to be preregistered in this case * so lock rmap and do __find_linux_pte_or_hugepte(). */ - if (kvmppc_gpa_to_ua(vcpu->kvm, tce_list, &ua, &rmap)) + if (kvmppc_tce_to_ua(vcpu->kvm, tce_list, &ua, &rmap)) return H_TOO_HARD; rmap = (void *) vmalloc_to_phys(rmap); @@ -542,9 +540,7 @@ long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu, unsigned long tce = be64_to_cpu(((u64 *)tces)[i]); ua = 0; - if (kvmppc_gpa_to_ua(vcpu->kvm, - tce & ~(TCE_PCI_READ | TCE_PCI_WRITE), - &ua, NULL)) + if (kvmppc_tce_to_ua(vcpu->kvm, tce, &ua, NULL)) return H_PARAMETER; list_for_each_entry_lockless(stit, &stt->iommu_tables, next) { -- 2.11.0