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From: "Xu, Quan" <quan.xu@intel.com>
To: xen-devel@lists.xen.org
Cc: Kevin Tian <kevin.tian@intel.com>,
	Stefano Stabellini <sstabellini@kernel.org>,
	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>,
	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 v6 07/11] IOMMU: propagate IOMMU Device-TLB flush error up to IOMMU suspending (top level ones)
Date: Tue, 31 May 2016 21:57:32 +0800	[thread overview]
Message-ID: <1464703056-4741-8-git-send-email-quan.xu@intel.com> (raw)
In-Reply-To: <1464703056-4741-1-git-send-email-quan.xu@intel.com>

From: Quan Xu <quan.xu@intel.com>

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 <sstabellini@kernel.org>
CC: Julien Grall <julien.grall@arm.com>
CC: Kevin Tian <kevin.tian@intel.com>
CC: Feng Wu <feng.wu@intel.com>

v6:
  1. Drop comments in enum dev_power_saved.
  2. If console_suspend() fails, return SAVED_NONE.
  3. Put off leaf ones (in iommu_flush_all()) in later patch.
---
 xen/arch/x86/acpi/power.c                     | 76 ++++++++++++++++++++-------
 xen/drivers/passthrough/amd/iommu_init.c      |  9 +++-
 xen/drivers/passthrough/amd/pci_amd_iommu.c   |  2 +-
 xen/drivers/passthrough/iommu.c               |  6 ++-
 xen/drivers/passthrough/vtd/iommu.c           | 35 ++++++++----
 xen/include/asm-x86/hvm/svm/amd-iommu-proto.h |  2 +-
 xen/include/xen/iommu.h                       |  4 +-
 7 files changed, 99 insertions(+), 35 deletions(-)

diff --git a/xen/arch/x86/acpi/power.c b/xen/arch/x86/acpi/power.c
index 2885e31..e516fbd 100644
--- a/xen/arch/x86/acpi/power.c
+++ b/xen/arch/x86/acpi/power.c
@@ -43,36 +43,70 @@ struct acpi_sleep_info acpi_sinfo;
 
 void do_suspend_lowlevel(void);
 
+enum dev_power_saved
+{
+    SAVED_NONE,
+    SAVED_CONSOLE,
+    SAVED_TIME,
+    SAVED_I8259A,
+    SAVED_IOAPIC,
+    SAVED_IOMMU,
+    SAVED_LAPIC,
+    SAVED_ALL,
+};
+
 static int device_power_down(void)
 {
-    console_suspend();
+    if ( console_suspend() )
+        return SAVED_NONE;
 
-    time_suspend();
+    if ( time_suspend() )
+        return SAVED_CONSOLE;
 
-    i8259A_suspend();
+    if ( i8259A_suspend() )
+        return SAVED_TIME;
 
+    /* ioapic_suspend cannot fail */
     ioapic_suspend();
 
-    iommu_suspend();
+    if ( iommu_suspend() )
+        return SAVED_IOAPIC;
 
-    lapic_suspend();
+    if ( lapic_suspend() )
+        return SAVED_IOMMU;
 
-    return 0;
+    return SAVED_NONE;
 }
 
-static void device_power_up(void)
+static void device_power_up(enum dev_power_saved saved)
 {
-    lapic_resume();
-
-    iommu_resume();
-
-    ioapic_resume();
-
-    i8259A_resume();
-
-    time_resume();
-
-    console_resume();
+    switch ( saved )
+    {
+    case SAVED_ALL:
+    case SAVED_LAPIC:
+        lapic_resume();
+        /* fall through */
+    case SAVED_IOMMU:
+        iommu_resume();
+        /* fall through */
+    case SAVED_IOAPIC:
+        ioapic_resume();
+        /* fall through */
+    case SAVED_I8259A:
+        i8259A_resume();
+        /* fall through */
+    case SAVED_TIME:
+        time_resume();
+        /* fall through */
+    case SAVED_CONSOLE:
+        console_resume();
+        /* fall through */
+    case SAVED_NONE:
+        break;
+    default:
+        BUG();
+        break;
+    }
 }
 
 static void freeze_domains(void)
@@ -169,6 +203,10 @@ static int enter_state(u32 state)
     {
         printk(XENLOG_ERR "Some devices failed to power down.");
         system_state = SYS_STATE_resume;
+
+        if ( error > 0 )
+            device_power_up(error);
+
         goto done;
     }
 
@@ -196,7 +234,7 @@ static int enter_state(u32 state)
     write_cr4(cr4 & ~X86_CR4_MCE);
     write_efer(read_efer());
 
-    device_power_up();
+    device_power_up(SAVED_ALL);
 
     mcheck_init(&boot_cpu_data, 0);
     write_cr4(cr4);
diff --git a/xen/drivers/passthrough/amd/iommu_init.c b/xen/drivers/passthrough/amd/iommu_init.c
index 4536106..0b68596 100644
--- a/xen/drivers/passthrough/amd/iommu_init.c
+++ b/xen/drivers/passthrough/amd/iommu_init.c
@@ -1339,7 +1339,14 @@ static void invalidate_all_devices(void)
     iterate_ivrs_mappings(_invalidate_all_devices);
 }
 
-void amd_iommu_suspend(void)
+int amd_iommu_suspend(void)
+{
+    amd_iommu_crash_shutdown();
+
+    return 0;
+}
+
+void amd_iommu_crash_shutdown(void)
 {
     struct amd_iommu *iommu;
 
diff --git a/xen/drivers/passthrough/amd/pci_amd_iommu.c b/xen/drivers/passthrough/amd/pci_amd_iommu.c
index 17c1f6d..9488eb0 100644
--- a/xen/drivers/passthrough/amd/pci_amd_iommu.c
+++ b/xen/drivers/passthrough/amd/pci_amd_iommu.c
@@ -638,6 +638,6 @@ 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/iommu.c b/xen/drivers/passthrough/iommu.c
index e9b2855..e611e72 100644
--- a/xen/drivers/passthrough/iommu.c
+++ b/xen/drivers/passthrough/iommu.c
@@ -380,10 +380,12 @@ int __init iommu_setup(void)
     return rc;
 }
 
-void iommu_suspend()
+int iommu_suspend()
 {
     if ( iommu_enabled )
-        iommu_get_ops()->suspend();
+        return iommu_get_ops()->suspend();
+
+    return 0;
 }
 
 void iommu_resume()
diff --git a/xen/drivers/passthrough/vtd/iommu.c b/xen/drivers/passthrough/vtd/iommu.c
index 5366267..c2bf1e2 100644
--- a/xen/drivers/passthrough/vtd/iommu.c
+++ b/xen/drivers/passthrough/vtd/iommu.c
@@ -541,7 +541,7 @@ static int iommu_flush_iotlb_psi(
     return status;
 }
 
-static void iommu_flush_all(void)
+static int __must_check iommu_flush_all(void)
 {
     struct acpi_drhd_unit *drhd;
     struct iommu *iommu;
@@ -555,6 +555,8 @@ static void iommu_flush_all(void)
         flush_dev_iotlb = find_ats_dev_drhd(iommu) ? 1 : 0;
         iommu_flush_iotlb_global(iommu, 0, flush_dev_iotlb);
     }
+
+    return 0;
 }
 
 static void __intel_iommu_iotlb_flush(struct domain *d, unsigned long gfn,
@@ -1259,7 +1261,9 @@ static void __hwdom_init intel_iommu_hwdom_init(struct domain *d)
     setup_hwdom_pci_devices(d, setup_hwdom_device);
     setup_hwdom_rmrr(d);
 
-    iommu_flush_all();
+    if ( iommu_flush_all() )
+        printk(XENLOG_WARNING VTDPREFIX
+               " IOMMU flush all failed for hardware domain\n");
 
     for_each_drhd_unit ( drhd )
     {
@@ -2001,7 +2005,7 @@ int adjust_vtd_irq_affinities(void)
 }
 __initcall(adjust_vtd_irq_affinities);
 
-static int init_vtd_hw(void)
+static int __must_check init_vtd_hw(void)
 {
     struct acpi_drhd_unit *drhd;
     struct iommu *iommu;
@@ -2099,8 +2103,8 @@ static int init_vtd_hw(void)
             return -EIO;
         }
     }
-    iommu_flush_all();
-    return 0;
+
+    return iommu_flush_all();
 }
 
 static void __hwdom_init setup_hwdom_rmrr(struct domain *d)
@@ -2389,16 +2393,25 @@ 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 __must_check vtd_suspend(void)
 {
     struct acpi_drhd_unit *drhd;
     struct iommu *iommu;
     u32    i;
+    int rc = 0;
 
     if ( !iommu_enabled )
-        return;
+        return 0;
 
-    iommu_flush_all();
+    rc = iommu_flush_all();
+    if ( unlikely(rc) )
+    {
+        printk(XENLOG_WARNING VTDPREFIX
+               " suspend: IOMMU flush all failed: %d\n", rc);
+
+        return rc;
+    }
 
     for_each_drhd_unit ( drhd )
     {
@@ -2427,6 +2440,8 @@ static void vtd_suspend(void)
         if ( !iommu_intremap && iommu_qinval )
             disable_qinval(iommu);
     }
+
+    return rc;
 }
 
 static void vtd_crash_shutdown(void)
@@ -2437,7 +2452,9 @@ static void vtd_crash_shutdown(void)
     if ( !iommu_enabled )
         return;
 
-    iommu_flush_all();
+    if ( iommu_flush_all() )
+        printk(XENLOG_WARNING VTDPREFIX
+               " crash shutdown: IOMMU flush all failed\n");
 
     for_each_drhd_unit ( drhd )
     {
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 ac9f036..d08dc0b 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 __must_check 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 22a2002..d197cd0 100644
--- a/xen/include/xen/iommu.h
+++ b/xen/include/xen/iommu.h
@@ -175,7 +175,7 @@ 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 __must_check (*suspend)(void);
     void (*resume)(void);
     void (*share_p2m)(struct domain *d);
     void (*crash_shutdown)(void);
@@ -185,7 +185,7 @@ struct iommu_ops {
     void (*dump_p2m_table)(struct domain *d);
 };
 
-void iommu_suspend(void);
+int __must_check 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:[~2016-05-31 13:57 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-05-31 13:57 [Patch v6 00/11] Check VT-d Device-TLB flush error Xu, Quan
2016-05-31 13:57 ` [Patch v6 01/11] IOMMU: handle IOMMU mapping and unmapping failures Xu, Quan
2016-06-01  9:52   ` Jan Beulich
2016-05-31 13:57 ` [Patch v6 02/11] IOMMU/MMU: enhance the call trees of IOMMU unmapping and mapping Xu, Quan
2016-06-01 10:05   ` Jan Beulich
2016-06-02  6:00     ` Xu, Quan
2016-06-02  9:13       ` Jan Beulich
2016-05-31 13:57 ` [Patch v6 03/11] IOMMU: propagate IOMMU Device-TLB flush error up to IOMMU unmapping (top level ones) Xu, Quan
2016-05-31 13:57 ` [Patch v6 04/11] IOMMU: propagate IOMMU Device-TLB flush error up to IOMMU mapping " Xu, Quan
2016-06-01 10:24   ` Jan Beulich
2016-06-02  7:25     ` Xu, Quan
2016-06-02  9:21       ` Jan Beulich
2016-06-02 12:43         ` Xu, Quan
2016-06-07  7:51         ` Xu, Quan
2016-06-07  8:19           ` Jan Beulich
2016-06-07  8:40             ` Xu, Quan
2016-06-07 10:11               ` Jan Beulich
2016-05-31 13:57 ` [Patch v6 05/11] IOMMU/MMU: propagate IOMMU Device-TLB flush error up to iommu_iotlb_flush{, _all} " Xu, Quan
2016-05-31 13:57 ` [Patch v6 06/11] propagate IOMMU Device-TLB flush error up to EPT update " Xu, Quan
2016-05-31 13:57 ` Xu, Quan [this message]
2016-06-01 10:39   ` [Patch v6 07/11] IOMMU: propagate IOMMU Device-TLB flush error up to IOMMU suspending " Jan Beulich
2016-06-02  2:58     ` Xu, Quan
2016-06-02  9:22       ` Jan Beulich
2016-05-31 13:57 ` [Patch v6 08/11] IOMMU: propagate IOMMU Device-TLB flush error (leaf ones) Xu, Quan
2016-05-31 13:57 ` [Patch v6 09/11] vt-d: fix the IOMMU flush issue Xu, Quan
2016-06-01 15:36   ` Jan Beulich
2016-06-02  2:50     ` Xu, Quan
2016-05-31 13:57 ` [Patch v6 10/11] vt-d: propagate the IOMMU Device-TLB flush error up to ME phantom functions Xu, Quan
2016-05-31 13:57 ` [Patch v6 11/11] vt-d: add __must_check annotation to IOMMU flush pointers and handlers Xu, Quan
2016-06-02 10:06   ` Jan Beulich

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