[Xen-changelog] [xen-unstable] AMD IOMMU: Enable HPET broadcast msi remapping

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Wei Wang <wei.wang2@xxxxxxx>
# Date 1353314806 -3600
# Node ID 9025a10c056174671c6c0d87816732a2ec6eaf0e
# Parent  321f8487379bd6ca157fe11b4b518436d8b31e7e
AMD IOMMU: Enable HPET broadcast msi remapping

This patch enables hpet msi remapping for amd iommu.

Signed-off-by: Wei Wang <wei.wang2@xxxxxxx>

- use the existing ACPI_IVHD_* #define-s
- warn on finding more than one IVHD HPET entry
- consolidate parameters of update_intremap_entry_from_msi_msg()

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Committed-by: Jan Beulich <jbeulich@xxxxxxxx>
---


diff -r 321f8487379b -r 9025a10c0561 xen/drivers/passthrough/amd/iommu_acpi.c
--- a/xen/drivers/passthrough/amd/iommu_acpi.c  Thu Nov 15 10:25:29 2012 +0000
+++ b/xen/drivers/passthrough/amd/iommu_acpi.c  Mon Nov 19 09:46:46 2012 +0100
@@ -653,9 +653,32 @@ static u16 __init parse_ivhd_device_spec
     }
 
     add_ivrs_mapping_entry(bdf, bdf, special->header.data_setting, iommu);
+
+    switch ( special->variety )
+    {
+    case ACPI_IVHD_IOAPIC:
     /* set device id of ioapic */
-    ioapic_sbdf[special->handle].bdf = bdf;
-    ioapic_sbdf[special->handle].seg = seg;
+        ioapic_sbdf[special->handle].bdf = bdf;
+        ioapic_sbdf[special->handle].seg = seg;
+        break;
+    case ACPI_IVHD_HPET:
+        /* set device id of hpet */
+        if ( hpet_sbdf.iommu )
+        {
+            printk(XENLOG_WARNING "Only one IVHD HPET entry is supported\n");
+            break;
+        }
+        hpet_sbdf.id = special->handle;
+        hpet_sbdf.bdf = bdf;
+        hpet_sbdf.seg = seg;
+        hpet_sbdf.iommu = iommu;
+        break;
+    default:
+        printk(XENLOG_ERR "Unrecognized IVHD special variety %#x\n",
+               special->variety);
+        return 0;
+    }
+
     return dev_length;
 }
 
diff -r 321f8487379b -r 9025a10c0561 xen/drivers/passthrough/amd/iommu_intr.c
--- a/xen/drivers/passthrough/amd/iommu_intr.c  Thu Nov 15 10:25:29 2012 +0000
+++ b/xen/drivers/passthrough/amd/iommu_intr.c  Mon Nov 19 09:46:46 2012 +0100
@@ -28,6 +28,7 @@
 #define INTREMAP_ENTRIES (1 << INTREMAP_LENGTH)
 
 struct ioapic_sbdf ioapic_sbdf[MAX_IO_APICS];
+struct hpet_sbdf hpet_sbdf;
 void *shared_intremap_table;
 static DEFINE_SPINLOCK(shared_intremap_lock);
 
@@ -262,19 +263,18 @@ void amd_iommu_ioapic_update_ire(
 }
 
 static void update_intremap_entry_from_msi_msg(
-    struct amd_iommu *iommu, struct pci_dev *pdev,
+    struct amd_iommu *iommu, u8 bdf,
     struct msi_desc *msi_desc, struct msi_msg *msg)
 {
     unsigned long flags;
     u32* entry;
-    u16 bdf, req_id, alias_id;
+    u16 req_id, alias_id;
     u8 delivery_mode, dest, vector, dest_mode;
     spinlock_t *lock;
     int offset;
 
-    bdf = PCI_BDF2(pdev->bus, pdev->devfn);
-    req_id = get_dma_requestor_id(pdev->seg, bdf);
-    alias_id = get_intremap_requestor_id(pdev->seg, bdf);
+    req_id = get_dma_requestor_id(iommu->seg, bdf);
+    alias_id = get_intremap_requestor_id(iommu->seg, bdf);
 
     if ( msg == NULL )
     {
@@ -284,7 +284,7 @@ static void update_intremap_entry_from_m
         spin_unlock_irqrestore(lock, flags);
 
         if ( ( req_id != alias_id ) &&
-             get_ivrs_mappings(pdev->seg)[alias_id].intremap_table != NULL )
+             get_ivrs_mappings(iommu->seg)[alias_id].intremap_table != NULL )
         {
             lock = get_intremap_lock(iommu->seg, alias_id);
             spin_lock_irqsave(lock, flags);
@@ -317,7 +317,7 @@ static void update_intremap_entry_from_m
 
     lock = get_intremap_lock(iommu->seg, alias_id);
     if ( ( req_id != alias_id ) &&
-         get_ivrs_mappings(pdev->seg)[alias_id].intremap_table != NULL )
+         get_ivrs_mappings(iommu->seg)[alias_id].intremap_table != NULL )
     {
         spin_lock_irqsave(lock, flags);
         entry = (u32*)get_intremap_entry(iommu->seg, alias_id, offset);
@@ -340,20 +340,23 @@ void amd_iommu_msi_msg_update_ire(
     struct msi_desc *msi_desc, struct msi_msg *msg)
 {
     struct pci_dev *pdev = msi_desc->dev;
-    int bdf = PCI_BDF2(pdev->bus, pdev->devfn);
+    int bdf, seg;
     struct amd_iommu *iommu;
 
     if ( !iommu_intremap )
         return;
 
-    iommu = find_iommu_for_device(pdev->seg, bdf);
+    bdf = pdev ? PCI_BDF2(pdev->bus, pdev->devfn) : hpet_sbdf.bdf;
+    seg = pdev ? pdev->seg : hpet_sbdf.seg;
+
+    iommu = find_iommu_for_device(seg, bdf);
     if ( !iommu )
     {
         AMD_IOMMU_DEBUG("Fail to find iommu for MSI device id = %#x\n", bdf);
         return;
     }
 
-    update_intremap_entry_from_msi_msg(iommu, pdev, msi_desc, msg);
+    update_intremap_entry_from_msi_msg(iommu, bdf, msi_desc, msg);
 }
 
 void amd_iommu_read_msi_from_ire(
@@ -383,3 +386,15 @@ void* __init amd_iommu_alloc_intremap_ta
     memset(tb, 0, PAGE_SIZE * (1UL << INTREMAP_TABLE_ORDER));
     return tb;
 }
+
+int __init amd_setup_hpet_msi(struct msi_desc *msi_desc)
+{
+    if ( (!msi_desc->hpet_id != hpet_sbdf.id) ||
+         (hpet_sbdf.iommu == NULL) )
+    {
+        AMD_IOMMU_DEBUG("Fail to setup HPET MSI remapping\n");
+        return 1;
+    }
+
+    return 0;
+}
diff -r 321f8487379b -r 9025a10c0561 xen/drivers/passthrough/amd/pci_amd_iommu.c
--- a/xen/drivers/passthrough/amd/pci_amd_iommu.c       Thu Nov 15 10:25:29 
2012 +0000
+++ b/xen/drivers/passthrough/amd/pci_amd_iommu.c       Mon Nov 19 09:46:46 
2012 +0100
@@ -599,6 +599,7 @@ const struct iommu_ops amd_iommu_ops = {
     .update_ire_from_msi = amd_iommu_msi_msg_update_ire,
     .read_apic_from_ire = __io_apic_read,
     .read_msi_from_ire = amd_iommu_read_msi_from_ire,
+    .setup_hpet_msi = amd_setup_hpet_msi,
     .suspend = amd_iommu_suspend,
     .resume = amd_iommu_resume,
     .share_p2m = amd_iommu_share_p2m,
diff -r 321f8487379b -r 9025a10c0561 
xen/include/asm-x86/hvm/svm/amd-iommu-proto.h
--- a/xen/include/asm-x86/hvm/svm/amd-iommu-proto.h     Thu Nov 15 10:25:29 
2012 +0000
+++ b/xen/include/asm-x86/hvm/svm/amd-iommu-proto.h     Mon Nov 19 09:46:46 
2012 +0100
@@ -97,12 +97,18 @@ void amd_iommu_msi_msg_update_ire(
     struct msi_desc *msi_desc, struct msi_msg *msg);
 void amd_iommu_read_msi_from_ire(
     struct msi_desc *msi_desc, struct msi_msg *msg);
+int amd_setup_hpet_msi(struct msi_desc *msi_desc);
 
 extern struct ioapic_sbdf {
     u16 bdf, seg;
 } ioapic_sbdf[MAX_IO_APICS];
 extern void *shared_intremap_table;
 
+extern struct hpet_sbdf {
+    u16 bdf, seg, id;
+    struct amd_iommu *iommu;
+} hpet_sbdf;
+
 /* power management support */
 void amd_iommu_resume(void);
 void amd_iommu_suspend(void);

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