[Xen-devel] [PATCH 09/57] ARM: VGIC: Move domain_max_vcpus() to be VGIC specific

[Andre Przywara <andre.przywara@xxxxxxxxxx>]

domain_max_vcpus(), which is used by generic Xen code, returns the
maximum number of VCPUs for a domain, which on ARM is mostly limited by
the VGIC model emulated (a (v)GICv2 can only handle 8 CPUs).
Our current implementation lives in arch/arm/domain.c, but reaches into
VGIC internal data structures.
Move this function into vgic.c, to keep this VGIC internal.

Signed-off-by: Andre Przywara <andre.przywara@xxxxxxxxxx>
---
Changelog RFC ... v1:
- dump previous approach, move function to VGIC specific file instead

 xen/arch/arm/domain.c | 14 --------------
 xen/arch/arm/vgic.c   | 14 ++++++++++++++
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/xen/arch/arm/domain.c b/xen/arch/arm/domain.c
index a010443bfd..8546443bad 100644
--- a/xen/arch/arm/domain.c
+++ b/xen/arch/arm/domain.c
@@ -968,20 +968,6 @@ void vcpu_block_unless_event_pending(struct vcpu *v)
         vcpu_unblock(current);
 }
 
-unsigned int domain_max_vcpus(const struct domain *d)
-{
-    /*
-     * Since evtchn_init would call domain_max_vcpus for poll_mask
-     * allocation when the vgic_ops haven't been initialised yet,
-     * we return MAX_VIRT_CPUS if d->arch.vgic.handler is null.
-     */
-    if ( !d->arch.vgic.handler )
-        return MAX_VIRT_CPUS;
-    else
-        return min_t(unsigned int, MAX_VIRT_CPUS,
-                     d->arch.vgic.handler->max_vcpus);
-}
-
 /*
  * Local variables:
  * mode: C
diff --git a/xen/arch/arm/vgic.c b/xen/arch/arm/vgic.c
index 34269bcf27..c3fdcebbde 100644
--- a/xen/arch/arm/vgic.c
+++ b/xen/arch/arm/vgic.c
@@ -665,6 +665,20 @@ void vgic_free_virq(struct domain *d, unsigned int virq)
     clear_bit(virq, d->arch.vgic.allocated_irqs);
 }
 
+unsigned int domain_max_vcpus(const struct domain *d)
+{
+    /*
+     * Since evtchn_init would call domain_max_vcpus for poll_mask
+     * allocation when the vgic_ops haven't been initialised yet,
+     * we return MAX_VIRT_CPUS if d->arch.vgic.handler is null.
+     */
+    if ( !d->arch.vgic.handler )
+        return MAX_VIRT_CPUS;
+    else
+        return min_t(unsigned int, MAX_VIRT_CPUS,
+                     d->arch.vgic.handler->max_vcpus);
+}
+
 /*
  * Local variables:
  * mode: C
-- 
2.14.1


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