[Xen-changelog] [xen master] propagate IOMMU Device-TLB flush error up to EPT update (top level ones)

[patchbot@xxxxxxx]

commit 855ed9fc5fb4b42c169f6e1c55488e59175652dd
Author:     Quan Xu <quan.xu@xxxxxxxxx>
AuthorDate: Fri Jun 17 10:25:52 2016 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Jun 17 10:25:52 2016 +0200

    propagate IOMMU Device-TLB flush error up to EPT update (top level ones)
    
    Propagate the IOMMU Device-TLB flush error up to the ept_set_entry(),
    when VT-d shares EPT page table.
    
    Signed-off-by: Quan Xu <quan.xu@xxxxxxxxx>
    Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: George Dunlap <george.dunlap@xxxxxxxxxx>
---
 xen/arch/x86/mm/p2m-ept.c           | 2 +-
 xen/drivers/passthrough/vtd/iommu.c | 6 ++++--
 xen/include/asm-x86/iommu.h         | 3 ++-
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/xen/arch/x86/mm/p2m-ept.c b/xen/arch/x86/mm/p2m-ept.c
index b4505f3..7166c71 100644
--- a/xen/arch/x86/mm/p2m-ept.c
+++ b/xen/arch/x86/mm/p2m-ept.c
@@ -832,7 +832,7 @@ out:
          need_modify_vtd_table )
     {
         if ( iommu_hap_pt_share )
-            iommu_pte_flush(d, gfn, &ept_entry->epte, order, vtd_pte_present);
+            rc = iommu_pte_flush(d, gfn, &ept_entry->epte, order, 
vtd_pte_present);
         else
         {
             if ( iommu_flags )
diff --git a/xen/drivers/passthrough/vtd/iommu.c 
b/xen/drivers/passthrough/vtd/iommu.c
index e900019..5366267 100644
--- a/xen/drivers/passthrough/vtd/iommu.c
+++ b/xen/drivers/passthrough/vtd/iommu.c
@@ -1752,8 +1752,8 @@ static int __must_check intel_iommu_unmap_page(struct 
domain *d,
     return dma_pte_clear_one(d, (paddr_t)gfn << PAGE_SHIFT_4K);
 }
 
-void iommu_pte_flush(struct domain *d, u64 gfn, u64 *pte,
-                     int order, int present)
+int iommu_pte_flush(struct domain *d, u64 gfn, u64 *pte,
+                    int order, int present)
 {
     struct acpi_drhd_unit *drhd;
     struct iommu *iommu = NULL;
@@ -1778,6 +1778,8 @@ void iommu_pte_flush(struct domain *d, u64 gfn, u64 *pte,
                                    order, !present, flush_dev_iotlb) )
             iommu_flush_write_buffer(iommu);
     }
+
+    return 0;
 }
 
 static int __init vtd_ept_page_compatible(struct iommu *iommu)
diff --git a/xen/include/asm-x86/iommu.h b/xen/include/asm-x86/iommu.h
index 23f3f5c..be95106 100644
--- a/xen/include/asm-x86/iommu.h
+++ b/xen/include/asm-x86/iommu.h
@@ -86,7 +86,8 @@ int iommu_setup_hpet_msi(struct msi_desc *);
 
 /* While VT-d specific, this must get declared in a generic header. */
 int adjust_vtd_irq_affinities(void);
-void iommu_pte_flush(struct domain *d, u64 gfn, u64 *pte, int order, int 
present);
+int __must_check iommu_pte_flush(struct domain *d, u64 gfn, u64 *pte,
+                                 int order, int present);
 bool_t iommu_supports_eim(void);
 int iommu_enable_x2apic_IR(void);
 void iommu_disable_x2apic_IR(void);
--
generated by git-patchbot for /home/xen/git/xen.git#master

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