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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v6 08/36] ARM: vGICv3: introduce ITS emulation stub
Hi Andre, On 07/04/17 18:32, Andre Przywara wrote: Create a new file to hold the emulation code for the ITS widget. This just holds the data structure and a init and free function for now. Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx> Acked-by: Julien Grall <julien.grall@xxxxxxx> Cheers, --- xen/arch/arm/Makefile | 1 + xen/arch/arm/vgic-v3-its.c | 86 ++++++++++++++++++++++++++++++++++++++++ xen/arch/arm/vgic-v3.c | 8 +++- xen/include/asm-arm/gic_v3_its.h | 13 ++++++ 4 files changed, 107 insertions(+), 1 deletion(-) create mode 100644 xen/arch/arm/vgic-v3-its.c diff --git a/xen/arch/arm/Makefile b/xen/arch/arm/Makefile index 6be85ab..49e1fb2 100644 --- a/xen/arch/arm/Makefile +++ b/xen/arch/arm/Makefile @@ -47,6 +47,7 @@ obj-y += traps.o obj-y += vgic.o obj-y += vgic-v2.o obj-$(CONFIG_HAS_GICV3) += vgic-v3.o +obj-$(CONFIG_HAS_ITS) += vgic-v3-its.o obj-y += vm_event.o obj-y += vtimer.o obj-y += vpsci.o diff --git a/xen/arch/arm/vgic-v3-its.c b/xen/arch/arm/vgic-v3-its.c new file mode 100644 index 0000000..2f1a255 --- /dev/null +++ b/xen/arch/arm/vgic-v3-its.c @@ -0,0 +1,86 @@ +/* + * xen/arch/arm/vgic-v3-its.c + * + * ARM Interrupt Translation Service (ITS) emulation + * + * Andre Przywara <andre.przywara@xxxxxxx> + * Copyright (c) 2016,2017 ARM Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; under version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; If not, see <http://www.gnu.org/licenses/>. + */ + +#include <xen/bitops.h> +#include <xen/config.h> +#include <xen/domain_page.h> +#include <xen/lib.h> +#include <xen/init.h> +#include <xen/softirq.h> +#include <xen/irq.h> +#include <xen/sched.h> +#include <xen/sizes.h> +#include <asm/current.h> +#include <asm/mmio.h> +#include <asm/gic_v3_defs.h> +#include <asm/gic_v3_its.h> +#include <asm/vgic.h> +#include <asm/vgic-emul.h> + +/* + * Data structure to describe a virtual ITS. + * If both the vcmd_lock and the its_lock are required, the vcmd_lock must + * be taken first. + */ +struct virt_its { + struct domain *d; + unsigned int devid_bits; + unsigned int intid_bits; + spinlock_t vcmd_lock; /* Protects the virtual command buffer, which */ + uint64_t cwriter; /* consists of CWRITER and CREADR and those */ + uint64_t creadr; /* shadow variables cwriter and creadr. */ + /* Protects the rest of this structure, including the ITS tables. */ + spinlock_t its_lock; + uint64_t cbaser; + uint64_t baser_dev, baser_coll; /* BASER0 and BASER1 for the guest */ + unsigned int max_collections; + unsigned int max_devices; + bool enabled; +}; + +/* + * An Interrupt Translation Table Entry: this is indexed by a + * DeviceID/EventID pair and is located in guest memory. + */ +struct vits_itte +{ + uint32_t vlpi; + uint16_t collection; + uint16_t pad; +}; + +int vgic_v3_its_init_domain(struct domain *d) +{ + return 0; +} + +void vgic_v3_its_free_domain(struct domain *d) +{ +} + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/arch/arm/vgic-v3.c b/xen/arch/arm/vgic-v3.c index 1e9890b..d10757a 100644 --- a/xen/arch/arm/vgic-v3.c +++ b/xen/arch/arm/vgic-v3.c @@ -28,6 +28,7 @@ #include <asm/current.h> #include <asm/mmio.h> #include <asm/gic_v3_defs.h> +#include <asm/gic_v3_its.h> #include <asm/vgic.h> #include <asm/vgic-emul.h> #include <asm/vreg.h> @@ -1438,7 +1439,7 @@ static inline unsigned int vgic_v3_rdist_count(struct domain *d) static int vgic_v3_domain_init(struct domain *d) { struct vgic_rdist_region *rdist_regions; - int rdist_count, i; + int rdist_count, i, ret; /* Allocate memory for Re-distributor regions */ rdist_count = vgic_v3_rdist_count(d); @@ -1498,6 +1499,10 @@ static int vgic_v3_domain_init(struct domain *d) d->arch.vgic.rdist_regions[0].first_cpu = 0; } + ret = vgic_v3_its_init_domain(d); + if ( ret ) + return ret; + /* Register mmio handle for the Distributor */ register_mmio_handler(d, &vgic_distr_mmio_handler, d->arch.vgic.dbase, SZ_64K, NULL); @@ -1522,6 +1527,7 @@ static int vgic_v3_domain_init(struct domain *d) static void vgic_v3_domain_free(struct domain *d) { + vgic_v3_its_free_domain(d); xfree(d->arch.vgic.rdist_regions); } diff --git a/xen/include/asm-arm/gic_v3_its.h b/xen/include/asm-arm/gic_v3_its.h index a96c9dc..84d1692 100644 --- a/xen/include/asm-arm/gic_v3_its.h +++ b/xen/include/asm-arm/gic_v3_its.h @@ -144,6 +144,10 @@ uint64_t gicv3_get_redist_address(unsigned int cpu, bool use_pta); /* Map a collection for this host CPU to each host ITS. */ int gicv3_its_setup_collection(unsigned int cpu); +/* Initialize and destroy the per-domain parts of the virtual ITS support. */ +int vgic_v3_its_init_domain(struct domain *d); +void vgic_v3_its_free_domain(struct domain *d); + int gicv3_allocate_host_lpi_block(struct domain *d, uint32_t *first_lpi); void gicv3_free_host_lpi_block(uint32_t first_lpi); @@ -184,6 +188,15 @@ static inline int gicv3_its_setup_collection(unsigned int cpu) BUG(); } +static inline int vgic_v3_its_init_domain(struct domain *d) +{ + return 0; +} + +static inline void vgic_v3_its_free_domain(struct domain *d) +{ +} + #endif /* CONFIG_HAS_ITS */ #endif -- Julien Grall _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel
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