[PATCH v8 15/23] intel_iommu: Replay all pasid bindings when either SRTP or TE bit is changed

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

From: Yi Liu <yi.l.liu@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.liu@intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
---
 hw/i386/intel_iommu.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index ccff240660..2c382fe7c8 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -77,6 +77,7 @@ 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)
 {
@@ -2630,6 +2631,7 @@ 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 */
@@ -2664,6 +2666,7 @@ 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 */
@@ -3163,6 +3166,13 @@ static void vtd_pasid_cache_sync(IntelIOMMUState *s, VTDPASIDCacheInfo *pc_info)
     vtd_iommu_unlock(s);
 }
 
+static void vtd_replay_pasid_bindings_all(IntelIOMMUState *s)
+{
+    VTDPASIDCacheInfo pc_info = { .type = VTD_INV_DESC_PASIDC_G_GLOBAL };
+
+    vtd_pasid_cache_sync(s, &pc_info);
+}
+
 static bool vtd_process_pasid_desc(IntelIOMMUState *s,
                                    VTDInvDesc *inv_desc)
 {
-- 
2.47.1