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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [Patch v6 07/11] IOMMU: propagate IOMMU Device-TLB flush error up to IOMMU suspending (top level ones)
From: Quan Xu <quan.xu@xxxxxxxxx>
Signed-off-by: Quan Xu <quan.xu@xxxxxxxxx>
CC: Jan Beulich <jbeulich@xxxxxxxx>
CC: Liu Jinsong <jinsong.liu@xxxxxxxxxxxxxxx>
CC: Keir Fraser <keir@xxxxxxx>
CC: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CC: Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>
CC: Stefano Stabellini <sstabellini@xxxxxxxxxx>
CC: Julien Grall <julien.grall@xxxxxxx>
CC: Kevin Tian <kevin.tian@xxxxxxxxx>
CC: Feng Wu <feng.wu@xxxxxxxxx>
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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