Convert GTT access via IO to use MMIO instead

diff --git a/master/filter-igfx-io b/master/filter-igfx-io
index 6e9d4820c2782485b261a0fffaa0feb5fcf94699..8176753c0863070282f904a8d77e26af38c64dec 100644 (file)
--- a/master/filter-igfx-io
+++ b/master/filter-igfx-io
@@ -1,5 +1,5 @@
 diff --git a/xen/arch/x86/hvm/io.c b/xen/arch/x86/hvm/io.c
-index 0d7f5ff..8be35e5 100644
+index 0d7f5ff..940ff1f 100644
 --- a/xen/arch/x86/hvm/io.c
 +++ b/xen/arch/x86/hvm/io.c
 @@ -278,6 +278,7 @@ void dpci_ioport_write(uint32_t mport, ioreq_t *p)
@@ -10,31 +10,39 @@ index 0d7f5ff..8be35e5 100644
  
      for ( i = 0; i < p->count; i++ )
      {
-@@ -286,6 +287,19 @@ void dpci_ioport_write(uint32_t mport, ioreq_t *p)
+@@ -286,6 +287,27 @@ void dpci_ioport_write(uint32_t mport, ioreq_t *p)
              (void)hvm_copy_from_guest_phys(
                  &data, p->data + (sign * i * p->size), p->size);
  
 +        if (d->igfx_ioport)
 +        {
-+            if (mport == d->igfx_ioport) {
-+                d->igfx_index = data;
-+            } else if (mport == (d->igfx_ioport+4)) {
-+                if ((d->igfx_index & 1) && (d->igfx_index < 0x10000)) {
-+                    //gdprintk(XENLOG_DEBUG, "iGFXIo: Skip outl(0x%04x,0x%08x) idx=0x%08x\n",
-+                    //         (u16)(mport), data, d->igfx_index);
++            if ( mport == d->igfx_ioport )
++            {
++                if ((d->igfx_index & 1) && (d->igfx_index < 0x10000))
++                {
++                    d->igfx_index = data & ~3;
 +                    continue;
++                } else {
++                    d->igfx_index = 0;
 +                }
 +            }
++            else if (mport == d->igfx_ioport+4 && d->igfx_index)
++            { 
++                (void)hvm_copy_to_guest_phys(
++                    d->igfx_mmio + 0x200000 + (d->igfx_index & ~3),
++                    &data, p->size);
++                    continue;
++            }
 +        }
 +
          switch ( p->size )
          {
          case 1:
 diff --git a/xen/drivers/passthrough/vtd/iommu.c b/xen/drivers/passthrough/vtd/iommu.c
-index ff56a19..2e8efff 100644
+index ff56a19..adeaa55 100644
 --- a/xen/drivers/passthrough/vtd/iommu.c
 +++ b/xen/drivers/passthrough/vtd/iommu.c
-@@ -1395,6 +1395,24 @@ static int domain_context_unmap(struct domain *domain, u8 bus, u8 devfn)
+@@ -1395,6 +1395,22 @@ static int domain_context_unmap(struct domain *domain, u8 bus, u8 devfn)
      return ret;
  }
  
@@ -47,19 +55,17 @@ index ff56a19..2e8efff 100644
 +    deviceid = pci_conf_read16(bus, d, f, PCI_DEVICE_ID);
 +    if ((vendorid == 0x8086) && (deviceid == 0x2a42)) {
 +        u32 iobase = pci_conf_read32(bus, d, f, PCI_BASE_ADDRESS_0 + 4*4) & PCI_BASE_ADDRESS_IO_MASK;
-+        printk(XENLOG_DEBUG "Found Intel 8086:2a42 gfx with I/O at 0x%04x\n", iobase);
-+        if (iobase > 0xffff) {
-+            printk(XENLOG_ERR "Intel 8086:2a42 gfx has invalid I/O base 0x%08x\n", iobase);
-+        } else {
-+            domain->igfx_ioport = (iobase & 0xffff);
-+        }
++        u32 mem0base = pci_conf_read32(bus, d, f, PCI_BASE_ADDRESS_0 + 0*4) & PCI_BASE_ADDRESS_MEM_MASK;
++        printk(XENLOG_DEBUG "Found Intel 8086:2a42 gfx with I/O at 0x%04x, MMIO at 0x%08x\n", iobase, mem0base);
++        domain->igfx_ioport = iobase;
++        domain->igfx_mmio = mem0base;
 +    }
 +}
 +
  static int reassign_device_ownership(
      struct domain *source,
      struct domain *target,
-@@ -1423,6 +1441,8 @@ static int reassign_device_ownership(
+@@ -1423,6 +1439,8 @@ static int reassign_device_ownership(
      list_move(&pdev->domain_list, &target->arch.pdev_list);
      pdev->domain = target;
  
@@ -69,15 +75,16 @@ index ff56a19..2e8efff 100644
      {
          drhd = acpi_find_matched_drhd_unit(pdev);
 diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h
-index 46731a5..06a9016 100644
+index 46731a5..ad76a28 100644
 --- a/xen/include/xen/sched.h
 +++ b/xen/include/xen/sched.h
-@@ -206,6 +206,8 @@ struct domain
+@@ -206,6 +206,9 @@ struct domain
      /* I/O capabilities (access to IRQs and memory-mapped I/O). */
      struct rangeset *iomem_caps;
      struct rangeset *irq_caps;
-+    u16 igfx_ioport;
++    u32 igfx_ioport;
 +    u32 igfx_index;
++    u32 igfx_mmio;
  
      /* Is this an HVM guest? */
      bool_t           is_hvm;