[PATCH 09/12] xen/arm: if is_domain_direct_mapped use native addresses for GICv3

[Stefano Stabellini <sstabellini@kernel.org>]

Today we use native addresses to map the GICv3 for Dom0 and fixed
addresses for DomUs.

This patch changes the behavior so that native addresses are used for
any domain that is_domain_direct_mapped. The patch has to introduce one
#ifndef CONFIG_NEW_VGIC because the new vgic doesn't support GICv3.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com>
---
 xen/arch/arm/domain_build.c | 12 +++++++++---
 xen/arch/arm/vgic-v3.c      | 18 ++++++++++++++----
 2 files changed, 23 insertions(+), 7 deletions(-)

diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 303bee60f6..beec0a144c 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -1697,8 +1697,12 @@ static int __init make_gicv3_domU_node(struct kernel_info *kinfo)
     int res = 0;
     __be32 reg[(GUEST_ROOT_ADDRESS_CELLS + GUEST_ROOT_SIZE_CELLS) * 2];
     __be32 *cells;
+    struct domain *d = kinfo->d;
+    char buf[38];
 
-    res = fdt_begin_node(fdt, "interrupt-controller@"__stringify(GUEST_GICV3_GICD_BASE));
+    snprintf(buf, sizeof(buf), "interrupt-controller@%"PRIx64,
+             d->arch.vgic.dbase);
+    res = fdt_begin_node(fdt, buf);
     if ( res )
         return res;
 
@@ -1720,9 +1724,11 @@ static int __init make_gicv3_domU_node(struct kernel_info *kinfo)
 
     cells = &reg[0];
     dt_child_set_range(&cells, GUEST_ROOT_ADDRESS_CELLS, GUEST_ROOT_SIZE_CELLS,
-                       GUEST_GICV3_GICD_BASE, GUEST_GICV3_GICD_SIZE);
+                       d->arch.vgic.dbase, GUEST_GICV3_GICD_SIZE);
+#if defined(CONFIG_GICV3) && !defined(CONFIG_NEW_VGIC)
     dt_child_set_range(&cells, GUEST_ROOT_ADDRESS_CELLS, GUEST_ROOT_SIZE_CELLS,
-                       GUEST_GICV3_GICR0_BASE, GUEST_GICV3_GICR0_SIZE);
+                       d->arch.vgic.rdist_regions[0].base, GUEST_GICV3_GICR0_SIZE);
+#endif
 
     res = fdt_property(fdt, "reg", reg, sizeof(reg));
     if (res)
diff --git a/xen/arch/arm/vgic-v3.c b/xen/arch/arm/vgic-v3.c
index 4e60ba15cc..4cf430f865 100644
--- a/xen/arch/arm/vgic-v3.c
+++ b/xen/arch/arm/vgic-v3.c
@@ -1677,13 +1677,25 @@ static int vgic_v3_domain_init(struct domain *d)
      * Domain 0 gets the hardware address.
      * Guests get the virtual platform layout.
      */
-    if ( is_hardware_domain(d) )
+    if ( is_domain_direct_mapped(d) )
     {
         unsigned int first_cpu = 0;
+        unsigned int nr_rdist_regions;
 
         d->arch.vgic.dbase = vgic_v3_hw.dbase;
 
-        for ( i = 0; i < vgic_v3_hw.nr_rdist_regions; i++ )
+        if ( is_hardware_domain(d) )
+        {
+            nr_rdist_regions = vgic_v3_hw.nr_rdist_regions;
+            d->arch.vgic.intid_bits = vgic_v3_hw.intid_bits;
+        }
+        else
+        {
+            nr_rdist_regions = 1;
+            d->arch.vgic.intid_bits = 10;
+        }
+
+        for ( i = 0; i < nr_rdist_regions; i++ )
         {
             paddr_t size = vgic_v3_hw.regions[i].size;
 
@@ -1706,8 +1718,6 @@ static int vgic_v3_domain_init(struct domain *d)
          * exposing unused region as they will not get emulated.
          */
         d->arch.vgic.nr_regions = i + 1;
-
-        d->arch.vgic.intid_bits = vgic_v3_hw.intid_bits;
     }
     else
     {
-- 
2.17.1