From: Andre Przywara <andre.przywara@arm.com> To: marc.zyngier@arm.com, christoffer.dall@linaro.org, kvmarm@lists.cs.columbia.edu Cc: eric.auger@linaro.org, Pavel Fedin <p.fedin@samsung.com>, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org Subject: [PATCH v2 06/15] KVM: arm64: Introduce new MMIO region for the ITS base address Date: Fri, 10 Jul 2015 15:21:42 +0100 [thread overview] Message-ID: <1436538111-4294-7-git-send-email-andre.przywara@arm.com> (raw) In-Reply-To: <1436538111-4294-1-git-send-email-andre.przywara@arm.com> The ARM GICv3 ITS controller requires a separate register frame to cover ITS specific registers. Add a new VGIC address type and store the address in a field in the vgic_dist structure. Provide a function to check whether userland has provided the address, so ITS functionality can be guarded by that check. Signed-off-by: Andre Przywara <andre.przywara@arm.com> --- Documentation/virtual/kvm/devices/arm-vgic.txt | 9 +++++++++ arch/arm64/include/uapi/asm/kvm.h | 2 ++ include/kvm/arm_vgic.h | 3 +++ virt/kvm/arm/vgic-v3-emul.c | 2 ++ virt/kvm/arm/vgic.c | 16 ++++++++++++++++ virt/kvm/arm/vgic.h | 1 + 6 files changed, 33 insertions(+) diff --git a/Documentation/virtual/kvm/devices/arm-vgic.txt b/Documentation/virtual/kvm/devices/arm-vgic.txt index 3fb9054..ec715f9e 100644 --- a/Documentation/virtual/kvm/devices/arm-vgic.txt +++ b/Documentation/virtual/kvm/devices/arm-vgic.txt @@ -39,6 +39,15 @@ Groups: Only valid for KVM_DEV_TYPE_ARM_VGIC_V3. This address needs to be 64K aligned. + KVM_VGIC_V3_ADDR_TYPE_ITS (rw, 64-bit) + Base address in the guest physical address space of the GICv3 ITS + control register frame. The ITS allows MSI(-X) interrupts to be + injected into guests. This extension is optional, if the kernel + does not support the ITS, the call returns -ENODEV. + This memory is solely for the guest to access the ITS control + registers and does not cover the ITS translation register. + Only valid for KVM_DEV_TYPE_ARM_VGIC_V3. + This address needs to be 64K aligned and the region covers 64 KByte. KVM_DEV_ARM_VGIC_GRP_DIST_REGS Attributes: diff --git a/arch/arm64/include/uapi/asm/kvm.h b/arch/arm64/include/uapi/asm/kvm.h index d268320..a89b407c 100644 --- a/arch/arm64/include/uapi/asm/kvm.h +++ b/arch/arm64/include/uapi/asm/kvm.h @@ -81,9 +81,11 @@ struct kvm_regs { /* Supported VGICv3 address types */ #define KVM_VGIC_V3_ADDR_TYPE_DIST 2 #define KVM_VGIC_V3_ADDR_TYPE_REDIST 3 +#define KVM_VGIC_V3_ADDR_TYPE_ITS 4 #define KVM_VGIC_V3_DIST_SIZE SZ_64K #define KVM_VGIC_V3_REDIST_SIZE (2 * SZ_64K) +#define KVM_VGIC_V3_ITS_SIZE SZ_64K #define KVM_ARM_VCPU_POWER_OFF 0 /* CPU is started in OFF state */ #define KVM_ARM_VCPU_EL1_32BIT 1 /* CPU running a 32bit VM */ diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index b18e2c5..3ee063b 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -178,6 +178,9 @@ struct vgic_dist { phys_addr_t vgic_redist_base; }; + /* The base address of the ITS control register frame */ + phys_addr_t vgic_its_base; + /* Distributor enabled */ u32 enabled; diff --git a/virt/kvm/arm/vgic-v3-emul.c b/virt/kvm/arm/vgic-v3-emul.c index 1f42348..a8cf669 100644 --- a/virt/kvm/arm/vgic-v3-emul.c +++ b/virt/kvm/arm/vgic-v3-emul.c @@ -887,6 +887,7 @@ void vgic_v3_init_emulation(struct kvm *kvm) dist->vgic_dist_base = VGIC_ADDR_UNDEF; dist->vgic_redist_base = VGIC_ADDR_UNDEF; + dist->vgic_its_base = VGIC_ADDR_UNDEF; kvm->arch.max_vcpus = KVM_MAX_VCPUS; } @@ -1059,6 +1060,7 @@ static int vgic_v3_has_attr(struct kvm_device *dev, return -ENXIO; case KVM_VGIC_V3_ADDR_TYPE_DIST: case KVM_VGIC_V3_ADDR_TYPE_REDIST: + case KVM_VGIC_V3_ADDR_TYPE_ITS: return 0; } break; diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c index 59f1801..15e447f 100644 --- a/virt/kvm/arm/vgic.c +++ b/virt/kvm/arm/vgic.c @@ -930,6 +930,16 @@ int vgic_register_kvm_io_dev(struct kvm *kvm, gpa_t base, int len, return ret; } +bool vgic_has_its(struct kvm *kvm) +{ + struct vgic_dist *dist = &kvm->arch.vgic; + + if (dist->vgic_model != KVM_DEV_TYPE_ARM_VGIC_V3) + return false; + + return !IS_VGIC_ADDR_UNDEF(dist->vgic_its_base); +} + static int vgic_nr_shared_irqs(struct vgic_dist *dist) { return dist->nr_irqs - VGIC_NR_PRIVATE_IRQS; @@ -1927,6 +1937,12 @@ int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write) block_size = KVM_VGIC_V3_REDIST_SIZE; alignment = SZ_64K; break; + case KVM_VGIC_V3_ADDR_TYPE_ITS: + type_needed = KVM_DEV_TYPE_ARM_VGIC_V3; + addr_ptr = &vgic->vgic_its_base; + block_size = KVM_VGIC_V3_ITS_SIZE; + alignment = SZ_64K; + break; #endif default: r = -ENODEV; diff --git a/virt/kvm/arm/vgic.h b/virt/kvm/arm/vgic.h index 0df74cb..a093f5c 100644 --- a/virt/kvm/arm/vgic.h +++ b/virt/kvm/arm/vgic.h @@ -136,5 +136,6 @@ int vgic_get_common_attr(struct kvm_device *dev, struct kvm_device_attr *attr); int vgic_init(struct kvm *kvm); void vgic_v2_init_emulation(struct kvm *kvm); void vgic_v3_init_emulation(struct kvm *kvm); +bool vgic_has_its(struct kvm *kvm); #endif -- 2.3.5
WARNING: multiple messages have this Message-ID (diff)
From: andre.przywara@arm.com (Andre Przywara) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 06/15] KVM: arm64: Introduce new MMIO region for the ITS base address Date: Fri, 10 Jul 2015 15:21:42 +0100 [thread overview] Message-ID: <1436538111-4294-7-git-send-email-andre.przywara@arm.com> (raw) In-Reply-To: <1436538111-4294-1-git-send-email-andre.przywara@arm.com> The ARM GICv3 ITS controller requires a separate register frame to cover ITS specific registers. Add a new VGIC address type and store the address in a field in the vgic_dist structure. Provide a function to check whether userland has provided the address, so ITS functionality can be guarded by that check. Signed-off-by: Andre Przywara <andre.przywara@arm.com> --- Documentation/virtual/kvm/devices/arm-vgic.txt | 9 +++++++++ arch/arm64/include/uapi/asm/kvm.h | 2 ++ include/kvm/arm_vgic.h | 3 +++ virt/kvm/arm/vgic-v3-emul.c | 2 ++ virt/kvm/arm/vgic.c | 16 ++++++++++++++++ virt/kvm/arm/vgic.h | 1 + 6 files changed, 33 insertions(+) diff --git a/Documentation/virtual/kvm/devices/arm-vgic.txt b/Documentation/virtual/kvm/devices/arm-vgic.txt index 3fb9054..ec715f9e 100644 --- a/Documentation/virtual/kvm/devices/arm-vgic.txt +++ b/Documentation/virtual/kvm/devices/arm-vgic.txt @@ -39,6 +39,15 @@ Groups: Only valid for KVM_DEV_TYPE_ARM_VGIC_V3. This address needs to be 64K aligned. + KVM_VGIC_V3_ADDR_TYPE_ITS (rw, 64-bit) + Base address in the guest physical address space of the GICv3 ITS + control register frame. The ITS allows MSI(-X) interrupts to be + injected into guests. This extension is optional, if the kernel + does not support the ITS, the call returns -ENODEV. + This memory is solely for the guest to access the ITS control + registers and does not cover the ITS translation register. + Only valid for KVM_DEV_TYPE_ARM_VGIC_V3. + This address needs to be 64K aligned and the region covers 64 KByte. KVM_DEV_ARM_VGIC_GRP_DIST_REGS Attributes: diff --git a/arch/arm64/include/uapi/asm/kvm.h b/arch/arm64/include/uapi/asm/kvm.h index d268320..a89b407c 100644 --- a/arch/arm64/include/uapi/asm/kvm.h +++ b/arch/arm64/include/uapi/asm/kvm.h @@ -81,9 +81,11 @@ struct kvm_regs { /* Supported VGICv3 address types */ #define KVM_VGIC_V3_ADDR_TYPE_DIST 2 #define KVM_VGIC_V3_ADDR_TYPE_REDIST 3 +#define KVM_VGIC_V3_ADDR_TYPE_ITS 4 #define KVM_VGIC_V3_DIST_SIZE SZ_64K #define KVM_VGIC_V3_REDIST_SIZE (2 * SZ_64K) +#define KVM_VGIC_V3_ITS_SIZE SZ_64K #define KVM_ARM_VCPU_POWER_OFF 0 /* CPU is started in OFF state */ #define KVM_ARM_VCPU_EL1_32BIT 1 /* CPU running a 32bit VM */ diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index b18e2c5..3ee063b 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -178,6 +178,9 @@ struct vgic_dist { phys_addr_t vgic_redist_base; }; + /* The base address of the ITS control register frame */ + phys_addr_t vgic_its_base; + /* Distributor enabled */ u32 enabled; diff --git a/virt/kvm/arm/vgic-v3-emul.c b/virt/kvm/arm/vgic-v3-emul.c index 1f42348..a8cf669 100644 --- a/virt/kvm/arm/vgic-v3-emul.c +++ b/virt/kvm/arm/vgic-v3-emul.c @@ -887,6 +887,7 @@ void vgic_v3_init_emulation(struct kvm *kvm) dist->vgic_dist_base = VGIC_ADDR_UNDEF; dist->vgic_redist_base = VGIC_ADDR_UNDEF; + dist->vgic_its_base = VGIC_ADDR_UNDEF; kvm->arch.max_vcpus = KVM_MAX_VCPUS; } @@ -1059,6 +1060,7 @@ static int vgic_v3_has_attr(struct kvm_device *dev, return -ENXIO; case KVM_VGIC_V3_ADDR_TYPE_DIST: case KVM_VGIC_V3_ADDR_TYPE_REDIST: + case KVM_VGIC_V3_ADDR_TYPE_ITS: return 0; } break; diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c index 59f1801..15e447f 100644 --- a/virt/kvm/arm/vgic.c +++ b/virt/kvm/arm/vgic.c @@ -930,6 +930,16 @@ int vgic_register_kvm_io_dev(struct kvm *kvm, gpa_t base, int len, return ret; } +bool vgic_has_its(struct kvm *kvm) +{ + struct vgic_dist *dist = &kvm->arch.vgic; + + if (dist->vgic_model != KVM_DEV_TYPE_ARM_VGIC_V3) + return false; + + return !IS_VGIC_ADDR_UNDEF(dist->vgic_its_base); +} + static int vgic_nr_shared_irqs(struct vgic_dist *dist) { return dist->nr_irqs - VGIC_NR_PRIVATE_IRQS; @@ -1927,6 +1937,12 @@ int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write) block_size = KVM_VGIC_V3_REDIST_SIZE; alignment = SZ_64K; break; + case KVM_VGIC_V3_ADDR_TYPE_ITS: + type_needed = KVM_DEV_TYPE_ARM_VGIC_V3; + addr_ptr = &vgic->vgic_its_base; + block_size = KVM_VGIC_V3_ITS_SIZE; + alignment = SZ_64K; + break; #endif default: r = -ENODEV; diff --git a/virt/kvm/arm/vgic.h b/virt/kvm/arm/vgic.h index 0df74cb..a093f5c 100644 --- a/virt/kvm/arm/vgic.h +++ b/virt/kvm/arm/vgic.h @@ -136,5 +136,6 @@ int vgic_get_common_attr(struct kvm_device *dev, struct kvm_device_attr *attr); int vgic_init(struct kvm *kvm); void vgic_v2_init_emulation(struct kvm *kvm); void vgic_v3_init_emulation(struct kvm *kvm); +bool vgic_has_its(struct kvm *kvm); #endif -- 2.3.5
next prev parent reply other threads:[~2015-07-10 14:22 UTC|newest] Thread overview: 138+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-07-10 14:21 [PATCH v2 00/15] KVM: arm64: GICv3 ITS emulation Andre Przywara 2015-07-10 14:21 ` Andre Przywara 2015-07-10 14:21 ` [PATCH v2 01/15] KVM: arm/arm64: VGIC: don't track used LRs in the distributor Andre Przywara 2015-07-10 14:21 ` Andre Przywara 2015-08-12 9:01 ` Eric Auger 2015-08-12 9:01 ` Eric Auger 2015-08-24 16:33 ` Andre Przywara 2015-08-24 16:33 ` Andre Przywara 2015-08-31 8:42 ` Eric Auger 2015-08-31 8:42 ` Eric Auger 2015-09-02 9:00 ` Andre Przywara 2015-09-02 9:00 ` Andre Przywara 2015-10-02 9:55 ` Pavel Fedin 2015-10-02 9:55 ` Pavel Fedin 2015-10-02 10:32 ` Andre Przywara 2015-10-02 10:32 ` Andre Przywara 2015-10-02 10:39 ` Pavel Fedin 2015-10-02 10:39 ` Pavel Fedin 2015-10-02 12:39 ` Pavel Fedin 2015-10-02 12:39 ` Pavel Fedin 2015-10-02 12:49 ` Andre Przywara 2015-10-02 12:49 ` Andre Przywara 2015-07-10 14:21 ` [PATCH v2 02/15] KVM: extend struct kvm_msi to hold a 32-bit device ID Andre Przywara 2015-07-10 14:21 ` Andre Przywara 2015-07-10 14:21 ` [PATCH v2 03/15] KVM: arm/arm64: add emulation model specific destroy function Andre Przywara 2015-07-10 14:21 ` Andre Przywara 2015-07-10 14:21 ` [PATCH v2 04/15] KVM: arm/arm64: extend arch CAP checks to allow per-VM capabilities Andre Przywara 2015-07-10 14:21 ` Andre Przywara 2015-08-12 12:26 ` Eric Auger 2015-08-12 12:26 ` Eric Auger 2015-07-10 14:21 ` [PATCH v2 05/15] KVM: arm/arm64: make GIC frame address initialization model specific Andre Przywara 2015-07-10 14:21 ` Andre Przywara 2015-08-12 13:02 ` Eric Auger 2015-08-12 13:02 ` Eric Auger 2015-08-24 17:24 ` Andre Przywara 2015-08-24 17:24 ` Andre Przywara 2015-08-31 9:31 ` Eric Auger 2015-08-31 9:31 ` Eric Auger 2015-07-10 14:21 ` Andre Przywara [this message] 2015-07-10 14:21 ` [PATCH v2 06/15] KVM: arm64: Introduce new MMIO region for the ITS base address Andre Przywara 2015-08-13 12:17 ` Eric Auger 2015-08-13 12:17 ` Eric Auger 2015-07-10 14:21 ` [PATCH v2 07/15] KVM: arm64: handle ITS related GICv3 redistributor registers Andre Przywara 2015-07-10 14:21 ` Andre Przywara 2015-08-13 12:17 ` Eric Auger 2015-08-13 12:17 ` Eric Auger 2015-08-24 18:08 ` Andre Przywara 2015-08-24 18:08 ` Andre Przywara 2015-07-10 14:21 ` [PATCH v2 08/15] KVM: arm64: introduce ITS emulation file with stub functions Andre Przywara 2015-07-10 14:21 ` Andre Przywara 2015-08-13 12:48 ` Eric Auger 2015-08-13 12:48 ` Eric Auger 2015-08-25 9:39 ` Andre Przywara 2015-08-25 9:39 ` Andre Przywara 2015-07-10 14:21 ` [PATCH v2 09/15] KVM: arm64: implement basic ITS register handlers Andre Przywara 2015-07-10 14:21 ` Andre Przywara 2015-08-13 15:25 ` Eric Auger 2015-08-13 15:25 ` Eric Auger 2015-08-25 10:23 ` Andre Przywara 2015-08-25 10:23 ` Andre Przywara 2015-10-02 7:51 ` Pavel Fedin 2015-10-02 7:51 ` Pavel Fedin 2015-07-10 14:21 ` [PATCH v2 10/15] KVM: arm64: add data structures to model ITS interrupt translation Andre Przywara 2015-07-10 14:21 ` Andre Przywara 2015-08-13 15:46 ` Eric Auger 2015-08-13 15:46 ` Eric Auger 2015-08-25 11:15 ` Andre Przywara 2015-08-25 11:15 ` Andre Przywara 2015-08-27 14:16 ` Eric Auger 2015-08-27 14:16 ` Eric Auger 2015-07-10 14:21 ` [PATCH v2 11/15] KVM: arm64: handle pending bit for LPIs in ITS emulation Andre Przywara 2015-07-10 14:21 ` Andre Przywara 2015-08-14 11:58 ` Eric Auger 2015-08-14 11:58 ` Eric Auger 2015-08-25 14:34 ` Andre Przywara 2015-08-25 14:34 ` Andre Przywara 2015-08-31 9:45 ` Eric Auger 2015-08-31 9:45 ` Eric Auger 2015-10-07 8:39 ` Pavel Fedin 2015-10-07 8:39 ` Pavel Fedin 2015-10-07 19:53 ` Christoffer Dall 2015-10-07 19:53 ` Christoffer Dall 2015-07-10 14:21 ` [PATCH v2 12/15] KVM: arm64: sync LPI configuration and pending tables Andre Przywara 2015-07-10 14:21 ` Andre Przywara 2015-08-14 11:58 ` Eric Auger 2015-08-14 11:58 ` Eric Auger 2015-08-14 12:35 ` Eric Auger 2015-08-14 12:35 ` Eric Auger 2015-08-25 15:47 ` Andre Przywara 2015-08-25 15:47 ` Andre Przywara 2015-08-31 9:51 ` Eric Auger 2015-08-31 9:51 ` Eric Auger 2015-08-25 15:27 ` Andre Przywara 2015-08-25 15:27 ` Andre Przywara 2015-08-31 9:47 ` Eric Auger 2015-08-31 9:47 ` Eric Auger 2015-07-10 14:21 ` [PATCH v2 13/15] KVM: arm64: implement ITS command queue command handlers Andre Przywara 2015-07-10 14:21 ` Andre Przywara 2015-08-17 13:33 ` Eric Auger 2015-08-17 13:33 ` Eric Auger 2015-10-07 14:54 ` Andre Przywara 2015-10-07 14:54 ` Andre Przywara 2015-07-10 14:21 ` [PATCH v2 14/15] KVM: arm64: implement MSI injection in ITS emulation Andre Przywara 2015-07-10 14:21 ` Andre Przywara 2015-07-31 13:22 ` Eric Auger 2015-07-31 13:22 ` Eric Auger 2015-08-02 20:20 ` Andre Przywara 2015-08-02 20:20 ` Andre Przywara 2015-08-03 6:41 ` Pavel Fedin 2015-08-03 6:41 ` Pavel Fedin 2015-08-03 9:07 ` Eric Auger 2015-08-03 9:07 ` Eric Auger 2015-08-03 9:16 ` Pavel Fedin 2015-08-03 9:16 ` Pavel Fedin 2015-08-03 15:37 ` Eric Auger 2015-08-03 15:37 ` Eric Auger 2015-08-03 17:06 ` Marc Zyngier 2015-08-03 17:06 ` Marc Zyngier 2015-08-04 6:53 ` Pavel Fedin 2015-08-04 6:53 ` Pavel Fedin 2015-08-24 14:14 ` Andre Przywara 2015-08-24 14:14 ` Andre Przywara 2015-08-17 13:44 ` Eric Auger 2015-08-17 13:44 ` Eric Auger 2015-07-10 14:21 ` [PATCH v2 15/15] KVM: arm64: enable ITS emulation as a virtual MSI controller Andre Przywara 2015-07-10 14:21 ` Andre Przywara 2015-07-15 9:10 ` Pavel Fedin 2015-07-15 9:10 ` Pavel Fedin 2015-07-15 9:52 ` Andre Przywara 2015-07-15 9:52 ` Andre Przywara 2015-07-15 10:01 ` Pavel Fedin 2015-07-15 10:01 ` Pavel Fedin 2015-07-15 12:02 ` [PATCH v2 00/15] KVM: arm64: GICv3 ITS emulation Pavel Fedin 2015-07-15 12:02 ` Pavel Fedin 2015-09-24 11:18 ` Pavel Fedin 2015-09-24 11:18 ` Pavel Fedin 2015-09-24 11:35 ` Andre Przywara 2015-09-24 11:35 ` Andre Przywara
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