[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v7 18/28] xen/arm: ITS: Export ITS info to Virtual ITS
From: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx> Export physical ITS information to virtual ITS driver Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx> --- v7: - Moved gic_its_info from gic-its.h to gic-v3-its.c - s/dev_bits/devID_bits - s/eventid_bits/eventID_bits - Dropped patch #20 and merged changes to this patch - Enabled compilation of vITS driver v6: - Passed only one physical ITS info - Passed all the values as parameters - Initialize vITS only if physical ITS is available --- xen/arch/arm/Makefile | 1 + xen/arch/arm/gic-v3-its.c | 21 +++++++++++++++++++++ xen/arch/arm/vgic-v3-its.c | 21 +++++++++++++++++++++ xen/include/asm-arm/vits.h | 2 ++ 4 files changed, 45 insertions(+) diff --git a/xen/arch/arm/Makefile b/xen/arch/arm/Makefile index 4708716..cd10d42 100644 --- a/xen/arch/arm/Makefile +++ b/xen/arch/arm/Makefile @@ -33,6 +33,7 @@ obj-y += shutdown.o obj-y += traps.o obj-y += vgic.o vgic-v2.o obj-$(CONFIG_ARM_64) += vgic-v3.o +obj-$(CONFIG_ARM_64) += vgic-v3-its.o obj-y += vtimer.o obj-y += vuart.o obj-y += hvm.o diff --git a/xen/arch/arm/gic-v3-its.c b/xen/arch/arm/gic-v3-its.c index 0d5c61c..f3346d3 100644 --- a/xen/arch/arm/gic-v3-its.c +++ b/xen/arch/arm/gic-v3-its.c @@ -37,6 +37,7 @@ #include <asm/gic.h> #include <asm/gic_v3_defs.h> #include <asm/gic-its.h> +#include <asm/vits.h> #include <xen/log2.h> #define its_print(lvl, fmt, ...) \ @@ -88,6 +89,11 @@ struct its_node { struct dt_device_node *dt_node; }; +static struct { + uint8_t eventID_bits; + uint8_t devID_bits; +} its_data; + #define ITS_ITT_ALIGN SZ_256 static LIST_HEAD(its_nodes); @@ -914,6 +920,8 @@ int its_assign_device(struct domain *d, u32 vdevid, u32 pdevid) for ( i = 0; i < pdev->event_map.nr_lpis; i++ ) { + ASSERT(i < (1 << its_data.eventID_bits)); + plpi = its_get_plpi(pdev, i); /* TODO: Route lpi */ } @@ -1366,6 +1374,8 @@ static int its_probe(struct dt_device_node *node) its->phys_size = its_size; typer = readl_relaxed(its_base + GITS_TYPER); its->ite_size = ((typer >> 4) & 0xf) + 1; + its_data.eventID_bits = GITS_TYPER_IDBITS(typer); + its_data.devID_bits = GITS_TYPER_DEVBITS(typer); its->cmd_base = xzalloc_bytes(ITS_CMD_QUEUE_SZ); if ( !its->cmd_base ) @@ -1457,6 +1467,7 @@ int its_cpu_init(void) int __init its_init(struct rdist_prop *rdists) { + struct its_node *its; struct dt_device_node *np = NULL; static const struct dt_device_match its_device_ids[] __initconst = @@ -1479,6 +1490,16 @@ int __init its_init(struct rdist_prop *rdists) its_alloc_lpi_tables(); its_lpi_init(rdists->id_bits); + its = list_first_entry(&its_nodes, struct its_node, entry); + /* + * As per vITS design spec, Xen exposes only one virtual ITS per domain. + * This simplifies vITS command model. i.e Simplifies processing global + * ITS commands which does not have device ID on platform having more + * than one physical ITS. + */ + vits_setup_hw(its_data.devID_bits, its_data.eventID_bits, + its->phys_base, its->phys_size); + return 0; } diff --git a/xen/arch/arm/vgic-v3-its.c b/xen/arch/arm/vgic-v3-its.c index 0d97fcb..3679d11 100644 --- a/xen/arch/arm/vgic-v3-its.c +++ b/xen/arch/arm/vgic-v3-its.c @@ -61,6 +61,26 @@ static void dump_cmd(const its_cmd_block *cmd) static void dump_cmd(const its_cmd_block *cmd) { } #endif +static struct { + bool_t enabled; + uint8_t devID_bits; + uint8_t eventID_bits; + /* GITS physical base */ + paddr_t phys_base; + /* GITS physical size */ + unsigned long phys_size; +} vits_hw; + +void vits_setup_hw(uint8_t devID_bits, uint8_t eventID_bits, + paddr_t phys_base, unsigned long phys_size) +{ + vits_hw.enabled = 1; + vits_hw.devID_bits = devID_bits; + vits_hw.eventID_bits = eventID_bits; + vits_hw.phys_base = phys_base; + vits_hw.phys_size = phys_size; +} + static inline uint16_t vits_get_max_collections(struct domain *d) { /* @@ -821,6 +841,7 @@ int vits_domain_init(struct domain *d) } ASSERT(is_hardware_domain(d)); + ASSERT(vits_hw.enabled); d->arch.vgic.vits = xzalloc(struct vgic_its); if ( !d->arch.vgic.vits ) diff --git a/xen/include/asm-arm/vits.h b/xen/include/asm-arm/vits.h index dc02762..d864c1e 100644 --- a/xen/include/asm-arm/vits.h +++ b/xen/include/asm-arm/vits.h @@ -78,6 +78,8 @@ int vits_get_vitt_entry(struct domain *d, uint32_t devid, uint32_t event, struct vitt *entry); int vits_get_vdevice_entry(struct domain *d, uint32_t devid, struct vdevice_table *entry); +void vits_setup_hw(uint8_t dev_bits, uint8_t eventid_bits, + paddr_t base, unsigned long size); #endif /* __ASM_ARM_VITS_H__ */ /* -- 1.7.9.5 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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