[PATCH v7 4/7] hw/arm/virt: Introduce virt_get_high_memmap_enabled() helper

[Gavin Shan <gshan@redhat.com>]

This introduces virt_get_high_memmap_enabled() helper, which returns
the pointer to vms->highmem_{redists, ecam, mmio}. The pointer will
be used in the subsequent patches.

No functional change intended.

Signed-off-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Tested-by: Zhenyu Zhang <zhenyzha@redhat.com>
---
 hw/arm/virt.c | 32 +++++++++++++++++++-------------
 1 file changed, 19 insertions(+), 13 deletions(-)

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 0bf3cb7057..ee98a8a3b6 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1689,14 +1689,31 @@ static uint64_t virt_cpu_mp_affinity(VirtMachineState *vms, int idx)
     return arm_cpu_mp_affinity(idx, clustersz);
 }
 
+static inline bool *virt_get_high_memmap_enabled(VirtMachineState *vms,
+                                                 int index)
+{
+    bool *enabled_array[] = {
+        &vms->highmem_redists,
+        &vms->highmem_ecam,
+        &vms->highmem_mmio,
+    };
+
+    assert(ARRAY_SIZE(extended_memmap) - VIRT_LOWMEMMAP_LAST ==
+           ARRAY_SIZE(enabled_array));
+    assert(index - VIRT_LOWMEMMAP_LAST < ARRAY_SIZE(enabled_array));
+
+    return enabled_array[index - VIRT_LOWMEMMAP_LAST];
+}
+
 static void virt_set_high_memmap(VirtMachineState *vms,
                                  hwaddr base, int pa_bits)
 {
     hwaddr region_base, region_size;
-    bool fits;
+    bool *region_enabled, fits;
     int i;
 
     for (i = VIRT_LOWMEMMAP_LAST; i < ARRAY_SIZE(extended_memmap); i++) {
+        region_enabled = virt_get_high_memmap_enabled(vms, i);
         region_base = ROUND_UP(base, extended_memmap[i].size);
         region_size = extended_memmap[i].size;
 
@@ -1714,18 +1731,7 @@ static void virt_set_high_memmap(VirtMachineState *vms,
             vms->highest_gpa = region_base + region_size - 1;
         }
 
-        switch (i) {
-        case VIRT_HIGH_GIC_REDIST2:
-            vms->highmem_redists &= fits;
-            break;
-        case VIRT_HIGH_PCIE_ECAM:
-            vms->highmem_ecam &= fits;
-            break;
-        case VIRT_HIGH_PCIE_MMIO:
-            vms->highmem_mmio &= fits;
-            break;
-        }
-
+        *region_enabled &= fits;
         base = region_base + region_size;
     }
 }
-- 
2.23.0