[PATCH rfcv1 5/6] intel_iommu: extract out vtd_cap_init to initialize cap/ecap

[Zhenzhong Duan <zhenzhong.duan@intel.com>]

This is a prerequisite for host cap/ecap sync.

No functional change intended.

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
---
 hw/i386/intel_iommu.c | 92 +++++++++++++++++++++++--------------------
 1 file changed, 50 insertions(+), 42 deletions(-)

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 95faf697eb..4c1d058ebd 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -4009,30 +4009,10 @@ static void vtd_iommu_replay(IOMMUMemoryRegion *iommu_mr, IOMMUNotifier *n)
     return;
 }
 
-/* Do the initialization. It will also be called when reset, so pay
- * attention when adding new initialization stuff.
- */
-static void vtd_init(IntelIOMMUState *s)
+static void vtd_cap_init(IntelIOMMUState *s)
 {
     X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(s);
 
-    memset(s->csr, 0, DMAR_REG_SIZE);
-    memset(s->wmask, 0, DMAR_REG_SIZE);
-    memset(s->w1cmask, 0, DMAR_REG_SIZE);
-    memset(s->womask, 0, DMAR_REG_SIZE);
-
-    s->root = 0;
-    s->root_scalable = false;
-    s->dmar_enabled = false;
-    s->intr_enabled = false;
-    s->iq_head = 0;
-    s->iq_tail = 0;
-    s->iq = 0;
-    s->iq_size = 0;
-    s->qi_enabled = false;
-    s->iq_last_desc_type = VTD_INV_DESC_NONE;
-    s->iq_dw = false;
-    s->next_frcd_reg = 0;
     s->cap = VTD_CAP_FRO | VTD_CAP_NFR | VTD_CAP_ND |
              VTD_CAP_MAMV | VTD_CAP_PSI | VTD_CAP_SLLPS |
              VTD_CAP_MGAW(s->aw_bits);
@@ -4049,27 +4029,6 @@ static void vtd_init(IntelIOMMUState *s)
     }
     s->ecap = VTD_ECAP_QI | VTD_ECAP_IRO;
 
-    /*
-     * Rsvd field masks for spte
-     */
-    vtd_spte_rsvd[0] = ~0ULL;
-    vtd_spte_rsvd[1] = VTD_SPTE_PAGE_L1_RSVD_MASK(s->aw_bits,
-                                                  x86_iommu->dt_supported);
-    vtd_spte_rsvd[2] = VTD_SPTE_PAGE_L2_RSVD_MASK(s->aw_bits);
-    vtd_spte_rsvd[3] = VTD_SPTE_PAGE_L3_RSVD_MASK(s->aw_bits);
-    vtd_spte_rsvd[4] = VTD_SPTE_PAGE_L4_RSVD_MASK(s->aw_bits);
-
-    vtd_spte_rsvd_large[2] = VTD_SPTE_LPAGE_L2_RSVD_MASK(s->aw_bits,
-                                                         x86_iommu->dt_supported);
-    vtd_spte_rsvd_large[3] = VTD_SPTE_LPAGE_L3_RSVD_MASK(s->aw_bits,
-                                                         x86_iommu->dt_supported);
-
-    if (s->scalable_mode || s->snoop_control) {
-        vtd_spte_rsvd[1] &= ~VTD_SPTE_SNP;
-        vtd_spte_rsvd_large[2] &= ~VTD_SPTE_SNP;
-        vtd_spte_rsvd_large[3] &= ~VTD_SPTE_SNP;
-    }
-
     if (x86_iommu_ir_supported(x86_iommu)) {
         s->ecap |= VTD_ECAP_IR | VTD_ECAP_MHMV;
         if (s->intr_eim == ON_OFF_AUTO_ON) {
@@ -4102,7 +4061,56 @@ static void vtd_init(IntelIOMMUState *s)
     if (s->pasid) {
         s->ecap |= VTD_ECAP_PASID;
     }
+}
+
+/*
+ * Do the initialization. It will also be called when reset, so pay
+ * attention when adding new initialization stuff.
+ */
+static void vtd_init(IntelIOMMUState *s)
+{
+    X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(s);
+
+    memset(s->csr, 0, DMAR_REG_SIZE);
+    memset(s->wmask, 0, DMAR_REG_SIZE);
+    memset(s->w1cmask, 0, DMAR_REG_SIZE);
+    memset(s->womask, 0, DMAR_REG_SIZE);
+
+    s->root = 0;
+    s->root_scalable = false;
+    s->dmar_enabled = false;
+    s->intr_enabled = false;
+    s->iq_head = 0;
+    s->iq_tail = 0;
+    s->iq = 0;
+    s->iq_size = 0;
+    s->qi_enabled = false;
+    s->iq_last_desc_type = VTD_INV_DESC_NONE;
+    s->iq_dw = false;
+    s->next_frcd_reg = 0;
+
+    /*
+     * Rsvd field masks for spte
+     */
+    vtd_spte_rsvd[0] = ~0ULL;
+    vtd_spte_rsvd[1] = VTD_SPTE_PAGE_L1_RSVD_MASK(s->aw_bits,
+                                                  x86_iommu->dt_supported);
+    vtd_spte_rsvd[2] = VTD_SPTE_PAGE_L2_RSVD_MASK(s->aw_bits);
+    vtd_spte_rsvd[3] = VTD_SPTE_PAGE_L3_RSVD_MASK(s->aw_bits);
+    vtd_spte_rsvd[4] = VTD_SPTE_PAGE_L4_RSVD_MASK(s->aw_bits);
+
+    vtd_spte_rsvd_large[2] = VTD_SPTE_LPAGE_L2_RSVD_MASK(s->aw_bits,
+                                                    x86_iommu->dt_supported);
+    vtd_spte_rsvd_large[3] = VTD_SPTE_LPAGE_L3_RSVD_MASK(s->aw_bits,
+                                                    x86_iommu->dt_supported);
+
+    if (s->scalable_mode || s->snoop_control) {
+        vtd_spte_rsvd[1] &= ~VTD_SPTE_SNP;
+        vtd_spte_rsvd_large[2] &= ~VTD_SPTE_SNP;
+        vtd_spte_rsvd_large[3] &= ~VTD_SPTE_SNP;
+    }
 
+    vtd_cap_init(s);
     vtd_reset_caches(s);
 
     /* Define registers with default values and bit semantics */
-- 
2.34.1