[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v7 5/5] xen/arm: check for GICv3 platform support
From: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx> ID_AA64PFR0_EL1 register provides information about GIC support. Check for this register in GICv3 driver. Also print GICv3 support information in boot log Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx> --- v7: - return -ENODEV on lack GICv3 platform support instead of panic --- xen/arch/arm/gic-v3.c | 7 +++++++ xen/arch/arm/setup.c | 5 +++-- xen/include/asm-arm/cpufeature.h | 1 + xen/include/asm-arm/processor.h | 5 ++--- 4 files changed, 13 insertions(+), 5 deletions(-) diff --git a/xen/arch/arm/gic-v3.c b/xen/arch/arm/gic-v3.c index 5ec5305..492fd54 100644 --- a/xen/arch/arm/gic-v3.c +++ b/xen/arch/arm/gic-v3.c @@ -38,6 +38,7 @@ #include <asm/device.h> #include <asm/gic.h> #include <asm/gic_v3_defs.h> +#include <asm/cpufeature.h> struct rdist_region { paddr_t base; @@ -1135,6 +1136,12 @@ static int __init gicv3_init(struct dt_device_node *node, const void *data) int res, i; uint32_t reg; + if ( !cpu_has_gicv3 ) + { + dprintk(XENLOG_ERR, "Platform does not support GICv3\n"); + return -ENODEV; + } + dt_device_set_used_by(node, DOMID_XEN); res = dt_device_get_address(node, 0, &gicv3.dbase, &gicv3.dbase_size); diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c index 78dc7f5..6a90c81 100644 --- a/xen/arch/arm/setup.c +++ b/xen/arch/arm/setup.c @@ -100,9 +100,10 @@ static void __init processor_id(void) cpu_has_el2_32 ? "64+32" : cpu_has_el2_64 ? "64" : "No", cpu_has_el1_32 ? "64+32" : cpu_has_el1_64 ? "64" : "No", cpu_has_el0_32 ? "64+32" : cpu_has_el0_64 ? "64" : "No"); - printk(" Extensions:%s%s\n", + printk(" Extensions:%s%s%s\n", cpu_has_fp ? " FloatingPoint" : "", - cpu_has_simd ? " AdvancedSIMD" : ""); + cpu_has_simd ? " AdvancedSIMD" : "", + cpu_has_gicv3 ? " GICv3" : ""); printk(" Debug Features: %016"PRIx64" %016"PRIx64"\n", boot_cpu_data.dbg64.bits[0], boot_cpu_data.dbg64.bits[1]); diff --git a/xen/include/asm-arm/cpufeature.h b/xen/include/asm-arm/cpufeature.h index 1d2c9c7..bd84c57 100644 --- a/xen/include/asm-arm/cpufeature.h +++ b/xen/include/asm-arm/cpufeature.h @@ -15,6 +15,7 @@ #define cpu_has_el3_64 (boot_cpu_feature64(el3) >= 1) #define cpu_has_fp (boot_cpu_feature64(fp) == 0) #define cpu_has_simd (boot_cpu_feature64(simd) == 0) +#define cpu_has_gicv3 (boot_cpu_feature64(gicv3) == 1) #endif #define cpu_feature32(c, feat) ((c)->pfr32.feat) diff --git a/xen/include/asm-arm/processor.h b/xen/include/asm-arm/processor.h index ccaa9da..0188800 100644 --- a/xen/include/asm-arm/processor.h +++ b/xen/include/asm-arm/processor.h @@ -188,9 +188,8 @@ struct cpuinfo_arm { unsigned long el3:4; unsigned long fp:4; /* Floating Point */ unsigned long simd:4; /* Advanced SIMD */ - unsigned long __res0:8; - - unsigned long __res1; + unsigned long gicv3:4; /* GIC support */ + unsigned long __res0:36; }; } pfr64; -- 1.7.9.5 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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