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From: Quan Xu <quan.xu@intel.com>
To: xen-devel@lists.xen.org
Cc: Kevin Tian <kevin.tian@intel.com>, Keir Fraser <keir@xen.org>,
	Quan Xu <quan.xu@intel.com>,
	Liu Jinsong <jinsong.liu@alibaba-inc.com>,
	dario.faggioli@citrix.com, Julien Grall <julien.grall@arm.com>,
	Stefano Stabellini <stefano.stabellini@citrix.com>,
	Jan Beulich <jbeulich@suse.com>,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	Feng Wu <feng.wu@intel.com>,
	Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Subject: [PATCH v2 09/11] IOMMU: propagate IOMMU Device-TLB flush error up to IOMMU suspending
Date: Mon, 18 Apr 2016 22:00:09 +0800	[thread overview]
Message-ID: <1460988011-17758-10-git-send-email-quan.xu@intel.com> (raw)
In-Reply-To: <1460988011-17758-1-git-send-email-quan.xu@intel.com>

While IOMMU Device-TLB flush timed out, xen calls panic() at present.
However the existing panic() is going to be eliminated, so we must
propagate the IOMMU Device-TLB flush error up to IOMMU suspending.

Signed-off-by: Quan Xu <quan.xu@intel.com>

CC: Jan Beulich <jbeulich@suse.com>
CC: Liu Jinsong <jinsong.liu@alibaba-inc.com>
CC: Keir Fraser <keir@xen.org>
CC: Andrew Cooper <andrew.cooper3@citrix.com>
CC: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
CC: Stefano Stabellini <stefano.stabellini@citrix.com>
CC: Julien Grall <julien.grall@arm.com>
CC: Kevin Tian <kevin.tian@intel.com>
CC: Feng Wu <feng.wu@intel.com>
---
 xen/arch/x86/acpi/power.c                     | 14 +++++++++++++-
 xen/drivers/passthrough/amd/iommu_init.c      |  9 ++++++++-
 xen/drivers/passthrough/amd/pci_amd_iommu.c   |  2 +-
 xen/drivers/passthrough/arm/smmu.c            | 10 ++++++----
 xen/drivers/passthrough/iommu.c               |  7 +++++--
 xen/drivers/passthrough/vtd/iommu.c           | 22 +++++++++++++++++-----
 xen/include/asm-x86/hvm/svm/amd-iommu-proto.h |  2 +-
 xen/include/xen/iommu.h                       |  4 ++--
 8 files changed, 53 insertions(+), 17 deletions(-)

diff --git a/xen/arch/x86/acpi/power.c b/xen/arch/x86/acpi/power.c
index 2885e31..9b87f00 100644
--- a/xen/arch/x86/acpi/power.c
+++ b/xen/arch/x86/acpi/power.c
@@ -45,19 +45,31 @@ void do_suspend_lowlevel(void);
 
 static int device_power_down(void)
 {
+    int err;
+
     console_suspend();
 
     time_suspend();
 
     i8259A_suspend();
 
-    ioapic_suspend();
+    err = iommu_suspend();
+    if ( err )
+        goto iommu_suspend_error;
 
     iommu_suspend();
 
     lapic_suspend();
 
     return 0;
+
+ iommu_suspend_error:
+    ioapic_resume();
+    i8259A_resume();
+    time_resume();
+    console_resume();
+
+    return err;
 }
 
 static void device_power_up(void)
diff --git a/xen/drivers/passthrough/amd/iommu_init.c b/xen/drivers/passthrough/amd/iommu_init.c
index 4536106..02588aa 100644
--- a/xen/drivers/passthrough/amd/iommu_init.c
+++ b/xen/drivers/passthrough/amd/iommu_init.c
@@ -1339,12 +1339,19 @@ static void invalidate_all_devices(void)
     iterate_ivrs_mappings(_invalidate_all_devices);
 }
 
-void amd_iommu_suspend(void)
+int amd_iommu_suspend(void)
 {
     struct amd_iommu *iommu;
 
     for_each_amd_iommu ( iommu )
         disable_iommu(iommu);
+
+    return 0;
+}
+
+void amd_iommu_crash_shutdown(void)
+{
+    amd_iommu_suspend();
 }
 
 void amd_iommu_resume(void)
diff --git a/xen/drivers/passthrough/amd/pci_amd_iommu.c b/xen/drivers/passthrough/amd/pci_amd_iommu.c
index c8ee8dc..fb8e816 100644
--- a/xen/drivers/passthrough/amd/pci_amd_iommu.c
+++ b/xen/drivers/passthrough/amd/pci_amd_iommu.c
@@ -628,6 +628,6 @@ const struct iommu_ops amd_iommu_ops = {
     .suspend = amd_iommu_suspend,
     .resume = amd_iommu_resume,
     .share_p2m = amd_iommu_share_p2m,
-    .crash_shutdown = amd_iommu_suspend,
+    .crash_shutdown = amd_iommu_crash_shutdown,
     .dump_p2m_table = amd_dump_p2m_table,
 };
diff --git a/xen/drivers/passthrough/arm/smmu.c b/xen/drivers/passthrough/arm/smmu.c
index 62da087..36c2c83 100644
--- a/xen/drivers/passthrough/arm/smmu.c
+++ b/xen/drivers/passthrough/arm/smmu.c
@@ -2540,7 +2540,7 @@ static int force_stage = 2;
  */
 static u32 platform_features = ARM_SMMU_FEAT_COHERENT_WALK;
 
-static void arm_smmu_iotlb_flush_all(struct domain *d)
+static int arm_smmu_iotlb_flush_all(struct domain *d)
 {
 	struct arm_smmu_xen_domain *smmu_domain = domain_hvm_iommu(d)->arch.priv;
 	struct iommu_domain *cfg;
@@ -2557,13 +2557,15 @@ static void arm_smmu_iotlb_flush_all(struct domain *d)
 		arm_smmu_tlb_inv_context(cfg->priv);
 	}
 	spin_unlock(&smmu_domain->lock);
+
+    return 0;
 }
 
-static void arm_smmu_iotlb_flush(struct domain *d, unsigned long gfn,
-                                 unsigned int page_count)
+static int arm_smmu_iotlb_flush(struct domain *d, unsigned long gfn,
+                                unsigned int page_count)
 {
     /* ARM SMMU v1 doesn't have flush by VMA and VMID */
-    arm_smmu_iotlb_flush_all(d);
+    return arm_smmu_iotlb_flush_all(d);
 }
 
 static struct iommu_domain *arm_smmu_get_domain(struct domain *d,
diff --git a/xen/drivers/passthrough/iommu.c b/xen/drivers/passthrough/iommu.c
index d44fc39..98b934b 100644
--- a/xen/drivers/passthrough/iommu.c
+++ b/xen/drivers/passthrough/iommu.c
@@ -392,11 +392,14 @@ int iommu_do_domctl(
     return ret;
 }
 
-void iommu_suspend()
+int iommu_suspend()
 {
     const struct iommu_ops *ops = iommu_get_ops();
+
     if ( iommu_enabled )
-        ops->suspend();
+        return ops->suspend();
+
+    return 0;
 }
 
 void iommu_share_p2m_table(struct domain* d)
diff --git a/xen/drivers/passthrough/vtd/iommu.c b/xen/drivers/passthrough/vtd/iommu.c
index 930661a..a821306 100644
--- a/xen/drivers/passthrough/vtd/iommu.c
+++ b/xen/drivers/passthrough/vtd/iommu.c
@@ -542,11 +542,12 @@ static int iommu_flush_iotlb_psi(
     return status;
 }
 
-static void iommu_flush_all(void)
+static int iommu_flush_all(void)
 {
     struct acpi_drhd_unit *drhd;
     struct iommu *iommu;
     int flush_dev_iotlb;
+    int rc = 0;
 
     flush_all_cache();
     for_each_drhd_unit ( drhd )
@@ -554,8 +555,13 @@ static void iommu_flush_all(void)
         iommu = drhd->iommu;
         iommu_flush_context_global(iommu, 0);
         flush_dev_iotlb = find_ats_dev_drhd(iommu) ? 1 : 0;
-        iommu_flush_iotlb_global(iommu, 0, flush_dev_iotlb);
+        rc = iommu_flush_iotlb_global(iommu, 0, flush_dev_iotlb);
+
+        if ( rc )
+            break;
     }
+
+    return rc;
 }
 
 static int iommu_flush_iotlb(struct domain *d, unsigned long gfn,
@@ -2421,16 +2427,20 @@ static int intel_iommu_group_id(u16 seg, u8 bus, u8 devfn)
 }
 
 static u32 iommu_state[MAX_IOMMUS][MAX_IOMMU_REGS];
-static void vtd_suspend(void)
+static int vtd_suspend(void)
 {
     struct acpi_drhd_unit *drhd;
     struct iommu *iommu;
     u32    i;
+    int rc;
 
     if ( !iommu_enabled )
-        return;
+        return 0;
 
-    iommu_flush_all();
+    rc = iommu_flush_all();
+
+    if ( rc )
+        return rc;
 
     for_each_drhd_unit ( drhd )
     {
@@ -2459,6 +2469,8 @@ static void vtd_suspend(void)
         if ( !iommu_intremap && iommu_qinval )
             disable_qinval(iommu);
     }
+
+    return 0;
 }
 
 static void vtd_crash_shutdown(void)
diff --git a/xen/include/asm-x86/hvm/svm/amd-iommu-proto.h b/xen/include/asm-x86/hvm/svm/amd-iommu-proto.h
index 9c51172..f540fc8 100644
--- a/xen/include/asm-x86/hvm/svm/amd-iommu-proto.h
+++ b/xen/include/asm-x86/hvm/svm/amd-iommu-proto.h
@@ -119,7 +119,7 @@ extern unsigned long *shared_intremap_inuse;
 
 /* power management support */
 void amd_iommu_resume(void);
-void amd_iommu_suspend(void);
+int amd_iommu_suspend(void);
 void amd_iommu_crash_shutdown(void);
 
 /* guest iommu support */
diff --git a/xen/include/xen/iommu.h b/xen/include/xen/iommu.h
index ca1c409..8710dfe 100644
--- a/xen/include/xen/iommu.h
+++ b/xen/include/xen/iommu.h
@@ -157,7 +157,7 @@ struct iommu_ops {
     unsigned int (*read_apic_from_ire)(unsigned int apic, unsigned int reg);
     int (*setup_hpet_msi)(struct msi_desc *);
 #endif /* CONFIG_X86 */
-    void (*suspend)(void);
+    int (*suspend)(void);
     void (*resume)(void);
     void (*share_p2m)(struct domain *d);
     void (*crash_shutdown)(void);
@@ -167,7 +167,7 @@ struct iommu_ops {
     void (*dump_p2m_table)(struct domain *d);
 };
 
-void iommu_suspend(void);
+int iommu_suspend(void);
 void iommu_resume(void);
 void iommu_crash_shutdown(void);
 int iommu_get_reserved_device_memory(iommu_grdm_t *, void *);
-- 
1.9.1


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  parent reply	other threads:[~2016-04-18 14:00 UTC|newest]

Thread overview: 78+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-18 14:00 [PATCH v2 00/11] Check VT-d Device-TLB flush error Quan Xu
2016-04-18 14:00 ` [PATCH v2 01/11] vt-d: fix the IOMMU flush issue Quan Xu
2016-04-19  6:33   ` Tian, Kevin
2016-04-19  8:33     ` Xu, Quan
2016-04-25  9:22   ` Jan Beulich
2016-04-26  1:17     ` Xu, Quan
2016-04-26  2:18     ` Xu, Quan
2016-04-26  9:10       ` Jan Beulich
2016-04-26 10:15         ` Xu, Quan
2016-04-26 10:52           ` Jan Beulich
2016-04-26 10:58             ` Xu, Quan
2016-04-18 14:00 ` [PATCH v2 02/11] IOMMU: handle IOMMU mapping and unmapping failures Quan Xu
2016-04-19  6:36   ` Tian, Kevin
2016-04-19  6:40     ` Xu, Quan
2016-04-25  9:26   ` Jan Beulich
2016-04-27 14:26     ` Xu, Quan
2016-04-27 15:02       ` Jan Beulich
2016-04-28  1:23         ` Xu, Quan
2016-04-18 14:00 ` [PATCH v2 03/11] IOMMU/MMU: enhance the call trees of IOMMU unmapping and mapping Quan Xu
2016-04-19  6:44   ` Tian, Kevin
2016-04-20  5:27     ` Xu, Quan
2016-04-20  5:44       ` Tian, Kevin
2016-04-20  6:11       ` Jan Beulich
2016-04-20  6:26         ` Xu, Quan
2016-04-25  9:50   ` Jan Beulich
2016-04-27  8:49     ` Xu, Quan
2016-04-27  9:36       ` Jan Beulich
2016-04-27 13:10         ` Xu, Quan
2016-04-27 14:06           ` Jan Beulich
2016-04-27 15:48   ` George Dunlap
2016-04-28  1:18     ` Xu, Quan
2016-04-18 14:00 ` [PATCH v2 04/11] grant_table: avoid unnecessary work during grant table unmapping Quan Xu
2016-04-19  6:46   ` Tian, Kevin
2016-04-19 13:27     ` Xu, Quan
2016-04-20  5:35       ` Tian, Kevin
2016-04-25  9:55   ` Jan Beulich
2016-04-26  6:48     ` Xu, Quan
2016-04-18 14:00 ` [PATCH v2 05/11] vt-d: propagate IOMMU Device-TLB flush error up to IOMMU unmapping Quan Xu
2016-04-19  6:51   ` Tian, Kevin
2016-04-19  7:01     ` Xu, Quan
2016-04-25 10:06   ` Jan Beulich
2016-04-26  6:49     ` Xu, Quan
2016-04-18 14:00 ` [PATCH v2 06/11] vt-d: propagate IOMMU Device-TLB flush error up to IOMMU mapping Quan Xu
2016-04-19  6:53   ` Tian, Kevin
2016-04-18 14:00 ` [PATCH v2 07/11] IOMMU/MMU: propagate IOMMU Device-TLB flush error up to iommu_iotlb_flush{, _all} (top level ones) Quan Xu
2016-04-25 10:19   ` Jan Beulich
2016-04-26 12:23     ` Xu, Quan
2016-04-26 12:48       ` Jan Beulich
2016-04-27  6:21         ` Xu, Quan
2016-04-27  6:31           ` Jan Beulich
2016-04-27  9:08             ` Xu, Quan
2016-04-27  9:38               ` Jan Beulich
2016-04-18 14:00 ` [PATCH v2 08/11] IOMMU: propagate IOMMU Device-TLB flush error up to iommu_iotlb_flush{, _all} (leaf ones) Quan Xu
2016-04-19  6:58   ` Tian, Kevin
2016-04-19  8:58     ` Xu, Quan
2016-04-25 11:39   ` Jan Beulich
2016-04-26 11:50     ` Xu, Quan
2016-04-26 12:51       ` Jan Beulich
2016-04-26 13:20         ` Xu, Quan
2016-04-18 14:00 ` Quan Xu [this message]
2016-04-25 11:52   ` [PATCH v2 09/11] IOMMU: propagate IOMMU Device-TLB flush error up to IOMMU suspending Jan Beulich
2016-04-25 13:58     ` Julien Grall
2016-04-25 14:50       ` Xu, Quan
2016-04-26  9:40         ` Julien Grall
2016-04-26 11:28     ` Xu, Quan
2016-04-28 14:14     ` Xu, Quan
2016-04-28 14:36       ` Jan Beulich
2016-04-28 15:03         ` Xu, Quan
2016-04-28 15:12           ` Jan Beulich
2016-04-28 16:08             ` Xu, Quan
2016-04-29  2:20               ` Tian, Kevin
2016-04-29  2:41                 ` Xu, Quan
2016-04-29  7:13                   ` Jan Beulich
2016-04-29  8:23                     ` Xu, Quan
2016-04-18 14:00 ` [PATCH v2 10/11] vt-d: propagate IOMMU Device-TLB flush error up to vt-d hardware initialization Quan Xu
2016-04-18 14:00 ` [PATCH v2 11/11] vt-d: propagate error up to ME phantom function mapping and unmapping Quan Xu
2016-04-25 12:00   ` Jan Beulich
2016-04-26 10:48     ` Xu, Quan

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