From: "Xu, Quan" <quan.xu@intel.com>
To: xen-devel@lists.xen.org
Cc: Kevin Tian <kevin.tian@intel.com>,
dario.faggioli@citrix.com, Feng Wu <feng.wu@intel.com>,
Jan Beulich <jbeulich@suse.com>, Quan Xu <quan.xu@intel.com>
Subject: [PATCH v10 2/3] vt-d: propagate the IOMMU Device-TLB flush error up to ME phantom functions
Date: Wed, 22 Jun 2016 15:51:09 +0800 [thread overview]
Message-ID: <1466581870-53183-3-git-send-email-quan.xu@intel.com> (raw)
In-Reply-To: <1466581870-53183-1-git-send-email-quan.xu@intel.com>
From: Quan Xu <quan.xu@intel.com>
Signed-off-by: Quan Xu <quan.xu@intel.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jan Beulich <jbeulich@suse.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 | 8 ++++----
xen/drivers/passthrough/vtd/quirks.c | 27 +++++++++++++++++----------
3 files changed, 23 insertions(+), 15 deletions(-)
diff --git a/xen/drivers/passthrough/vtd/extern.h b/xen/drivers/passthrough/vtd/extern.h
index cbe0286..6772839 100644
--- a/xen/drivers/passthrough/vtd/extern.h
+++ b/xen/drivers/passthrough/vtd/extern.h
@@ -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);
diff --git a/xen/drivers/passthrough/vtd/iommu.c b/xen/drivers/passthrough/vtd/iommu.c
index 999cdf6..3692113 100644
--- a/xen/drivers/passthrough/vtd/iommu.c
+++ b/xen/drivers/passthrough/vtd/iommu.c
@@ -1455,8 +1455,8 @@ int domain_context_mapping_one(
unmap_vtd_domain_page(context_entries);
- if ( !seg )
- me_wifi_quirk(domain, bus, devfn, MAP_ME_PHANTOM_FUNC);
+ if ( !seg && !rc )
+ rc = me_wifi_quirk(domain, bus, devfn, MAP_ME_PHANTOM_FUNC);
return rc;
}
@@ -1605,8 +1605,8 @@ int domain_context_unmap_one(
spin_unlock(&iommu->lock);
unmap_vtd_domain_page(context_entries);
- if ( !iommu->intel->drhd->segment )
- me_wifi_quirk(domain, bus, devfn, UNMAP_ME_PHANTOM_FUNC);
+ if ( !iommu->intel->drhd->segment && !rc )
+ rc = me_wifi_quirk(domain, bus, devfn, UNMAP_ME_PHANTOM_FUNC);
return rc;
}
diff --git a/xen/drivers/passthrough/vtd/quirks.c b/xen/drivers/passthrough/vtd/quirks.c
index 473d1fc..91f96ac 100644
--- a/xen/drivers/passthrough/vtd/quirks.c
+++ b/xen/drivers/passthrough/vtd/quirks.c
@@ -331,10 +331,12 @@ 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));
@@ -342,23 +344,26 @@ 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 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);
@@ -372,7 +377,7 @@ 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;
@@ -382,7 +387,7 @@ 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);
@@ -398,12 +403,14 @@ 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)
--
1.9.1
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next prev parent reply other threads:[~2016-06-22 7:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-22 7:51 [PATCH v10 0/3] Check VT-d Device-TLB flush error Xu, Quan
2016-06-22 7:51 ` [PATCH v10 1/3] vt-d: fix the IOMMU flush issue Xu, Quan
2016-06-22 7:51 ` Xu, Quan [this message]
2016-06-22 7:51 ` [PATCH v10 3/3] vt-d: add __must_check annotation to IOMMU flush pointers and handlers Xu, Quan
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