[Xen-devel] [PATCH V2 1/8] xen/arm64: increase MAX_VIRT_CPUS to 128 on arm64

[Chen Baozi <cbz@xxxxxxxxxx>]

From: Chen Baozi <baozich@xxxxxxxxx>

GIC-500 supports up to 128 cores in a single SoC. Increase MAX_VIRT_CPUS
to 128 on arm64.

Signed-off-by: Chen Baozi <baozich@xxxxxxxxx>
---
 xen/arch/arm/vgic-v3.c       | 2 +-
 xen/include/asm-arm/config.h | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/xen/arch/arm/vgic-v3.c b/xen/arch/arm/vgic-v3.c
index 45d54a2..40e1892 100644
--- a/xen/arch/arm/vgic-v3.c
+++ b/xen/arch/arm/vgic-v3.c
@@ -906,7 +906,7 @@ 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);
+        BUG_ON(v->domain->max_vcpus > MAX_VIRT_CPUS);
         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


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