From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Auger Subject: [PATCH v6 20/24] KVM: arm64: vgic-its: vgic_its_check_id returns the entry's GPA Date: Thu, 4 May 2017 13:44:40 +0200 Message-ID: <1493898284-29504-21-git-send-email-eric.auger@redhat.com> References: <1493898284-29504-1-git-send-email-eric.auger@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Prasun.Kapoor@cavium.com, quintela@redhat.com, dgilbert@redhat.com, bjsprakash.linux@gmail.com, pbonzini@redhat.com To: eric.auger.pro@gmail.com, eric.auger@redhat.com, marc.zyngier@arm.com, christoffer.dall@linaro.org, andre.przywara@arm.com, vijayak@caviumnetworks.com, Vijaya.Kumar@cavium.com, peter.maydell@linaro.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Return-path: In-Reply-To: <1493898284-29504-1-git-send-email-eric.auger@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu List-Id: kvm.vger.kernel.org As vgic_its_check_id() computes the device/collection entry's GPA, let's return it so that new callers can retrieve it easily. Signed-off-by: Eric Auger Acked-by: Christoffer Dall --- v5 -> v6: - add Christoffer's A-b v3 -> v4: - check eaddr is not NULL to allow passing NULL eaddr parameter to vgic_its_check_id v2: new --- virt/kvm/arm/vgic/vgic-its.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c index 6bef9147..a3ed52a 100644 --- a/virt/kvm/arm/vgic/vgic-its.c +++ b/virt/kvm/arm/vgic/vgic-its.c @@ -668,7 +668,8 @@ static int vgic_its_cmd_handle_movi(struct kvm *kvm, struct vgic_its *its, * is actually valid (covered by a memslot and guest accessible). * For this we have to read the respective first level entry. */ -static bool vgic_its_check_id(struct vgic_its *its, u64 baser, u32 id) +static bool vgic_its_check_id(struct vgic_its *its, u64 baser, u32 id, + gpa_t *eaddr) { int l1_tbl_size = GITS_BASER_NR_PAGES(baser) * SZ_64K; u64 indirect_ptr, type = GITS_BASER_TYPE(baser); @@ -699,6 +700,8 @@ static bool vgic_its_check_id(struct vgic_its *its, u64 baser, u32 id) addr = BASER_ADDRESS(baser) + id * esz; gfn = addr >> PAGE_SHIFT; + if (eaddr) + *eaddr = addr; return kvm_is_visible_gfn(its->dev->kvm, gfn); } @@ -731,6 +734,8 @@ static bool vgic_its_check_id(struct vgic_its *its, u64 baser, u32 id) indirect_ptr += index * esz; gfn = indirect_ptr >> PAGE_SHIFT; + if (eaddr) + *eaddr = indirect_ptr; return kvm_is_visible_gfn(its->dev->kvm, gfn); } @@ -740,7 +745,7 @@ static int vgic_its_alloc_collection(struct vgic_its *its, { struct its_collection *collection; - if (!vgic_its_check_id(its, its->baser_coll_table, coll_id)) + if (!vgic_its_check_id(its, its->baser_coll_table, coll_id, NULL)) return E_ITS_MAPC_COLLECTION_OOR; collection = kzalloc(sizeof(*collection), GFP_KERNEL); @@ -913,7 +918,7 @@ static int vgic_its_cmd_handle_mapd(struct kvm *kvm, struct vgic_its *its, gpa_t itt_addr = its_cmd_get_ittaddr(its_cmd); struct its_device *device; - if (!vgic_its_check_id(its, its->baser_device_table, device_id)) + if (!vgic_its_check_id(its, its->baser_device_table, device_id, NULL)) return E_ITS_MAPD_DEVICE_OOR; if (valid && num_eventid_bits > VITS_TYPER_IDBITS) -- 2.5.5 From mboxrd@z Thu Jan 1 00:00:00 1970 From: eric.auger@redhat.com (Eric Auger) Date: Thu, 4 May 2017 13:44:40 +0200 Subject: [PATCH v6 20/24] KVM: arm64: vgic-its: vgic_its_check_id returns the entry's GPA In-Reply-To: <1493898284-29504-1-git-send-email-eric.auger@redhat.com> References: <1493898284-29504-1-git-send-email-eric.auger@redhat.com> Message-ID: <1493898284-29504-21-git-send-email-eric.auger@redhat.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org As vgic_its_check_id() computes the device/collection entry's GPA, let's return it so that new callers can retrieve it easily. Signed-off-by: Eric Auger Acked-by: Christoffer Dall --- v5 -> v6: - add Christoffer's A-b v3 -> v4: - check eaddr is not NULL to allow passing NULL eaddr parameter to vgic_its_check_id v2: new --- virt/kvm/arm/vgic/vgic-its.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c index 6bef9147..a3ed52a 100644 --- a/virt/kvm/arm/vgic/vgic-its.c +++ b/virt/kvm/arm/vgic/vgic-its.c @@ -668,7 +668,8 @@ static int vgic_its_cmd_handle_movi(struct kvm *kvm, struct vgic_its *its, * is actually valid (covered by a memslot and guest accessible). * For this we have to read the respective first level entry. */ -static bool vgic_its_check_id(struct vgic_its *its, u64 baser, u32 id) +static bool vgic_its_check_id(struct vgic_its *its, u64 baser, u32 id, + gpa_t *eaddr) { int l1_tbl_size = GITS_BASER_NR_PAGES(baser) * SZ_64K; u64 indirect_ptr, type = GITS_BASER_TYPE(baser); @@ -699,6 +700,8 @@ static bool vgic_its_check_id(struct vgic_its *its, u64 baser, u32 id) addr = BASER_ADDRESS(baser) + id * esz; gfn = addr >> PAGE_SHIFT; + if (eaddr) + *eaddr = addr; return kvm_is_visible_gfn(its->dev->kvm, gfn); } @@ -731,6 +734,8 @@ static bool vgic_its_check_id(struct vgic_its *its, u64 baser, u32 id) indirect_ptr += index * esz; gfn = indirect_ptr >> PAGE_SHIFT; + if (eaddr) + *eaddr = indirect_ptr; return kvm_is_visible_gfn(its->dev->kvm, gfn); } @@ -740,7 +745,7 @@ static int vgic_its_alloc_collection(struct vgic_its *its, { struct its_collection *collection; - if (!vgic_its_check_id(its, its->baser_coll_table, coll_id)) + if (!vgic_its_check_id(its, its->baser_coll_table, coll_id, NULL)) return E_ITS_MAPC_COLLECTION_OOR; collection = kzalloc(sizeof(*collection), GFP_KERNEL); @@ -913,7 +918,7 @@ static int vgic_its_cmd_handle_mapd(struct kvm *kvm, struct vgic_its *its, gpa_t itt_addr = its_cmd_get_ittaddr(its_cmd); struct its_device *device; - if (!vgic_its_check_id(its, its->baser_device_table, device_id)) + if (!vgic_its_check_id(its, its->baser_device_table, device_id, NULL)) return E_ITS_MAPD_DEVICE_OOR; if (valid && num_eventid_bits > VITS_TYPER_IDBITS) -- 2.5.5