[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v8 8/8] xen/arm64: increase MAX_VIRT_CPUS to 128 on arm64
From: Chen Baozi <baozich@xxxxxxxxx> After we have increased the size of GICR in address space for guest and made use of both AFF0 and AFF1 in (v)MPIDR, we are now able to support up to 4096 vCPUs in theory. However, it will cost 512M address space for GICR region, which is unnecessary big at the moment. Considering the max CPU number that GIC-500 can support and the old value of MAX_VIRT_CPUS before commit aa25a61, we increase its value to 128. Signed-off-by: Chen Baozi <baozich@xxxxxxxxx> --- Since the domain_max_vcpus has been changed to depends on vgic_ops, we could have done more work in order to drop the definition of MAX_VIRT_CPUS. However, because it is still used for some conditional compilation in common code, I think that would be better done in a separate cleanup patch series. xen/arch/arm/vgic-v3.c | 1 - xen/include/asm-arm/config.h | 4 ++++ 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/xen/arch/arm/vgic-v3.c b/xen/arch/arm/vgic-v3.c index 93af6c8..2548b62 100644 --- a/xen/arch/arm/vgic-v3.c +++ b/xen/arch/arm/vgic-v3.c @@ -889,7 +889,6 @@ static int vgic_v3_distr_mmio_write(struct vcpu *v, mmio_info_t *info) rank = vgic_rank_offset(v, 64, gicd_reg - GICD_IROUTER, DABT_DOUBLE_WORD); if ( rank == NULL ) goto write_ignore; - BUG_ON(v->domain->max_vcpus > 8); new_irouter = *r; vgic_lock_rank(v, rank, flags); diff --git a/xen/include/asm-arm/config.h b/xen/include/asm-arm/config.h index 3b23e05..817c216 100644 --- a/xen/include/asm-arm/config.h +++ b/xen/include/asm-arm/config.h @@ -47,7 +47,11 @@ #define NR_CPUS 128 #endif +#ifdef CONFIG_ARM_64 +#define MAX_VIRT_CPUS 128 +#else #define MAX_VIRT_CPUS 8 +#endif #define asmlinkage /* Nothing needed */ -- 2.1.4 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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