[PATCH v4 17/20] intel_iommu: Replay all pasid bindings when either SRTP or TE bit is changed

[Zhenzhong Duan]

From: Yi Liu <yi.l....@intel.com>

When either 'Set Root Table Pointer' or 'Translation Enable' bit is changed,
all pasid bindings on host side become stale and need to be updated.

Introduce a helper function vtd_replay_pasid_bindings_all() to go through all
pasid entries in all passthrough devices to update host side bindings.

Signed-off-by: Yi Liu <yi.l....@intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.d...@intel.com>
---
 hw/i386/intel_iommu.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 27bd8c4c89..d2442ff28d 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -89,6 +89,7 @@ struct vtd_iotlb_key {
 
 static void vtd_address_space_refresh_all(IntelIOMMUState *s);
 static void vtd_address_space_unmap(VTDAddressSpace *as, IOMMUNotifier *n);
+static void vtd_replay_pasid_bindings_all(IntelIOMMUState *s);
 
 static void vtd_pasid_cache_reset_locked(IntelIOMMUState *s);
 static void vtd_pasid_cache_sync(IntelIOMMUState *s,
@@ -3050,6 +3051,7 @@ static void vtd_handle_gcmd_srtp(IntelIOMMUState *s)
     vtd_set_clear_mask_long(s, DMAR_GSTS_REG, 0, VTD_GSTS_RTPS);
     vtd_reset_caches(s);
     vtd_address_space_refresh_all(s);
+    vtd_replay_pasid_bindings_all(s);
 }
 
 /* Set Interrupt Remap Table Pointer */
@@ -3084,6 +3086,7 @@ static void vtd_handle_gcmd_te(IntelIOMMUState *s, bool 
en)
 
     vtd_reset_caches(s);
     vtd_address_space_refresh_all(s);
+    vtd_replay_pasid_bindings_all(s);
 }
 
 /* Handle Interrupt Remap Enable/Disable */
@@ -3774,6 +3777,17 @@ static void 
vtd_replay_guest_pasid_bindings(IntelIOMMUState *s,
     }
 }
 
+static void vtd_replay_pasid_bindings_all(IntelIOMMUState *s)
+{
+    VTDPASIDCacheInfo pc_info = { .type = VTD_PASID_CACHE_GLOBAL_INV };
+
+    if (!s->flts || !s->root_scalable || !s->dmar_enabled) {
+        return;
+    }
+
+    vtd_replay_guest_pasid_bindings(s, &pc_info);
+}
+
 /*
  * For a PASID cache invalidation, this function handles below scenarios:
  * a) a present cached pasid entry needs to be removed
-- 
2.47.1