@@ -91,7 +91,8 @@ int is_igd_vt_enabled_quirk(void);
void platform_quirks_init(void);
void vtd_ops_preamble_quirk(struct iommu* iommu);
void vtd_ops_postamble_quirk(struct iommu* iommu);
-void me_wifi_quirk(struct domain *domain, u8 bus, u8 devfn, int map);
+int __must_check me_wifi_quirk(struct domain *domain,
+ u8 bus, u8 devfn, int map);
void pci_vtd_quirk(const struct pci_dev *);
bool_t platform_supports_intremap(void);
bool_t platform_supports_x2apic(void);
@@ -1301,7 +1301,7 @@ int domain_context_mapping_one(
u64 maddr, pgd_maddr;
u16 seg = iommu->intel->drhd->segment;
int agaw;
- int rc;
+ int rc, ret;
ASSERT(pcidevs_locked());
spin_lock(&iommu->lock);
@@ -1435,7 +1435,12 @@ int domain_context_mapping_one(
unmap_vtd_domain_page(context_entries);
if ( !seg )
- me_wifi_quirk(domain, bus, devfn, MAP_ME_PHANTOM_FUNC);
+ {
+ ret = me_wifi_quirk(domain, bus, devfn, MAP_ME_PHANTOM_FUNC);
+
+ if ( !rc && unlikely(ret) )
+ rc = ret;
+ }
return rc;
}
@@ -1532,7 +1537,7 @@ int domain_context_unmap_one(
struct context_entry *context, *context_entries;
u64 maddr;
int iommu_domid;
- int rc;
+ int rc, ret;
ASSERT(pcidevs_locked());
spin_lock(&iommu->lock);
@@ -1580,7 +1585,12 @@ int domain_context_unmap_one(
unmap_vtd_domain_page(context_entries);
if ( !iommu->intel->drhd->segment )
- me_wifi_quirk(domain, bus, devfn, UNMAP_ME_PHANTOM_FUNC);
+ {
+ ret = me_wifi_quirk(domain, bus, devfn, UNMAP_ME_PHANTOM_FUNC);
+
+ if ( !rc && unlikely(ret) )
+ rc = ret;
+ }
return rc;
}
@@ -332,10 +332,12 @@ void __init platform_quirks_init(void)
* assigning Intel integrated wifi device to a guest.
*/
-static void map_me_phantom_function(struct domain *domain, u32 dev, int map)
+static int __must_check map_me_phantom_function(struct domain *domain,
+ u32 dev, int map)
{
struct acpi_drhd_unit *drhd;
struct pci_dev *pdev;
+ int rc;
/* find ME VT-d engine base on a real ME device */
pdev = pci_get_pdev(0, 0, PCI_DEVFN(dev, 0));
@@ -343,23 +345,27 @@ static void map_me_phantom_function(struct domain *domain, u32 dev, int map)
/* map or unmap ME phantom function */
if ( map )
- domain_context_mapping_one(domain, drhd->iommu, 0,
- PCI_DEVFN(dev, 7), NULL);
+ rc = domain_context_mapping_one(domain, drhd->iommu, 0,
+ PCI_DEVFN(dev, 7), NULL);
else
- domain_context_unmap_one(domain, drhd->iommu, 0,
- PCI_DEVFN(dev, 7));
+ rc = domain_context_unmap_one(domain, drhd->iommu, 0,
+ PCI_DEVFN(dev, 7));
+
+ return rc;
}
-void me_wifi_quirk(struct domain *domain, u8 bus, u8 devfn, int map)
+int __must_check me_wifi_quirk(struct domain *domain,
+ u8 bus, u8 devfn, int map)
{
u32 id;
+ int rc = 0;
id = pci_conf_read32(0, 0, 0, 0, 0);
if ( IS_CTG(id) )
{
/* quit if ME does not exist */
if ( pci_conf_read32(0, 0, 3, 0, 0) == 0xffffffff )
- return;
+ return 0;
/* if device is WLAN device, map ME phantom device 0:3.7 */
id = pci_conf_read32(0, bus, PCI_SLOT(devfn), PCI_FUNC(devfn), 0);
@@ -373,7 +379,7 @@ void me_wifi_quirk(struct domain *domain, u8 bus, u8 devfn, int map)
case 0x423b8086:
case 0x423c8086:
case 0x423d8086:
- map_me_phantom_function(domain, 3, map);
+ rc = map_me_phantom_function(domain, 3, map);
break;
default:
break;
@@ -383,7 +389,7 @@ void me_wifi_quirk(struct domain *domain, u8 bus, u8 devfn, int map)
{
/* quit if ME does not exist */
if ( pci_conf_read32(0, 0, 22, 0, 0) == 0xffffffff )
- return;
+ return 0;
/* if device is WLAN device, map ME phantom device 0:22.7 */
id = pci_conf_read32(0, bus, PCI_SLOT(devfn), PCI_FUNC(devfn), 0);
@@ -399,12 +405,14 @@ void me_wifi_quirk(struct domain *domain, u8 bus, u8 devfn, int map)
case 0x42388086: /* Puma Peak */
case 0x422b8086:
case 0x422c8086:
- map_me_phantom_function(domain, 22, map);
+ rc = map_me_phantom_function(domain, 22, map);
break;
default:
break;
}
}
+
+ return rc;
}
void pci_vtd_quirk(const struct pci_dev *pdev)
Propagate the IOMMU Device-TLB flush error up to ME phantom function mapping and unmapping. Signed-off-by: Quan Xu <quan.xu@intel.com> CC: Jan Beulich <jbeulich@suse.com> CC: Kevin Tian <kevin.tian@intel.com> CC: Feng Wu <feng.wu@intel.com> --- xen/drivers/passthrough/vtd/extern.h | 3 ++- xen/drivers/passthrough/vtd/iommu.c | 18 ++++++++++++++---- xen/drivers/passthrough/vtd/quirks.c | 28 ++++++++++++++++++---------- 3 files changed, 34 insertions(+), 15 deletions(-)