diff mbox series

[v3,10/16] i2c:pm_smbus: Fix state transfer

Message ID 20181126200435.23408-11-minyard@acm.org
State Superseded
Headers show
Series [v3,01/16] i2c: Split smbus into parts | expand

Commit Message

Corey Minyard Nov. 26, 2018, 8:04 p.m. UTC
From: Corey Minyard <cminyard@mvista.com>


Transfer the state information for the SMBus registers and
internal data so it will work on a VM transfer.

Signed-off-by: Corey Minyard <cminyard@mvista.com>

Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 hw/acpi/piix4.c           |  7 +++++++
 hw/i2c/pm_smbus.c         | 31 +++++++++++++++++++++++++++++++
 hw/i2c/smbus_ich9.c       | 10 +++++++++-
 include/hw/i2c/pm_smbus.h |  9 +++++++++
 4 files changed, 56 insertions(+), 1 deletion(-)

-- 
2.17.1

Comments

Dr. David Alan Gilbert Nov. 29, 2018, 12:28 p.m. UTC | #1
* minyard@acm.org (minyard@acm.org) wrote:
> From: Corey Minyard <cminyard@mvista.com>

> 

> Transfer the state information for the SMBus registers and

> internal data so it will work on a VM transfer.

> 

> Signed-off-by: Corey Minyard <cminyard@mvista.com>

> Cc: Michael S. Tsirkin <mst@redhat.com>

> Cc: Paolo Bonzini <pbonzini@redhat.com>

> Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>


Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>


> ---

>  hw/acpi/piix4.c           |  7 +++++++

>  hw/i2c/pm_smbus.c         | 31 +++++++++++++++++++++++++++++++

>  hw/i2c/smbus_ich9.c       | 10 +++++++++-

>  include/hw/i2c/pm_smbus.h |  9 +++++++++

>  4 files changed, 56 insertions(+), 1 deletion(-)

> 

> diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c

> index 2f4dd03b83..91fe4821d3 100644

> --- a/hw/acpi/piix4.c

> +++ b/hw/acpi/piix4.c

> @@ -302,6 +302,11 @@ static const VMStateDescription vmstate_cpuhp_state = {

>      }

>  };

>  

> +static bool piix4_vmstate_need_smbus(void *opaque, int version_id)

> +{

> +    return pm_smbus_vmstate_needed();

> +}

> +

>  /* qemu-kvm 1.2 uses version 3 but advertised as 2

>   * To support incoming qemu-kvm 1.2 migration, change version_id

>   * and minimum_version_id to 2 below (which breaks migration from

> @@ -321,6 +326,8 @@ static const VMStateDescription vmstate_acpi = {

>          VMSTATE_UINT16(ar.pm1.evt.en, PIIX4PMState),

>          VMSTATE_UINT16(ar.pm1.cnt.cnt, PIIX4PMState),

>          VMSTATE_STRUCT(apm, PIIX4PMState, 0, vmstate_apm, APMState),

> +        VMSTATE_STRUCT_TEST(smb, PIIX4PMState, piix4_vmstate_need_smbus, 3,

> +                            pmsmb_vmstate, PMSMBus),

>          VMSTATE_TIMER_PTR(ar.tmr.timer, PIIX4PMState),

>          VMSTATE_INT64(ar.tmr.overflow_time, PIIX4PMState),

>          VMSTATE_STRUCT(ar.gpe, PIIX4PMState, 2, vmstate_gpe, ACPIGPE),

> diff --git a/hw/i2c/pm_smbus.c b/hw/i2c/pm_smbus.c

> index 8793113c25..2a9bc6e8c0 100644

> --- a/hw/i2c/pm_smbus.c

> +++ b/hw/i2c/pm_smbus.c

> @@ -19,6 +19,7 @@

>   */

>  #include "qemu/osdep.h"

>  #include "hw/hw.h"

> +#include "hw/boards.h"

>  #include "hw/i2c/pm_smbus.h"

>  #include "hw/i2c/smbus_master.h"

>  

> @@ -450,6 +451,36 @@ static const MemoryRegionOps pm_smbus_ops = {

>      .endianness = DEVICE_LITTLE_ENDIAN,

>  };

>  

> +bool pm_smbus_vmstate_needed(void)

> +{

> +    MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());

> +

> +    return !mc->smbus_no_migration_support;

> +}

> +

> +const VMStateDescription pmsmb_vmstate = {

> +    .name = "pmsmb",

> +    .version_id = 1,

> +    .minimum_version_id = 1,

> +    .fields = (VMStateField[]) {

> +        VMSTATE_UINT8(smb_stat, PMSMBus),

> +        VMSTATE_UINT8(smb_ctl, PMSMBus),

> +        VMSTATE_UINT8(smb_cmd, PMSMBus),

> +        VMSTATE_UINT8(smb_addr, PMSMBus),

> +        VMSTATE_UINT8(smb_data0, PMSMBus),

> +        VMSTATE_UINT8(smb_data1, PMSMBus),

> +        VMSTATE_UINT32(smb_index, PMSMBus),

> +        VMSTATE_UINT8_ARRAY(smb_data, PMSMBus, PM_SMBUS_MAX_MSG_SIZE),

> +        VMSTATE_UINT8(smb_auxctl, PMSMBus),

> +        VMSTATE_UINT8(smb_blkdata, PMSMBus),

> +        VMSTATE_BOOL(i2c_enable, PMSMBus),

> +        VMSTATE_BOOL(op_done, PMSMBus),

> +        VMSTATE_BOOL(in_i2c_block_read, PMSMBus),

> +        VMSTATE_BOOL(start_transaction_on_status_read, PMSMBus),

> +        VMSTATE_END_OF_LIST()

> +    }

> +};

> +

>  void pm_smbus_init(DeviceState *parent, PMSMBus *smb, bool force_aux_blk)

>  {

>      smb->op_done = true;

> diff --git a/hw/i2c/smbus_ich9.c b/hw/i2c/smbus_ich9.c

> index e6d8d28194..7b24be8256 100644

> --- a/hw/i2c/smbus_ich9.c

> +++ b/hw/i2c/smbus_ich9.c

> @@ -43,12 +43,20 @@ typedef struct ICH9SMBState {

>      PMSMBus smb;

>  } ICH9SMBState;

>  

> +static bool ich9_vmstate_need_smbus(void *opaque, int version_id)

> +{

> +    return pm_smbus_vmstate_needed();

> +}

> +

>  static const VMStateDescription vmstate_ich9_smbus = {

>      .name = "ich9_smb",

>      .version_id = 1,

>      .minimum_version_id = 1,

>      .fields = (VMStateField[]) {

> -        VMSTATE_PCI_DEVICE(dev, struct ICH9SMBState),

> +        VMSTATE_PCI_DEVICE(dev, ICH9SMBState),

> +        VMSTATE_BOOL_TEST(irq_enabled, ICH9SMBState, ich9_vmstate_need_smbus),

> +        VMSTATE_STRUCT_TEST(smb, ICH9SMBState, ich9_vmstate_need_smbus, 1,

> +                            pmsmb_vmstate, PMSMBus),

>          VMSTATE_END_OF_LIST()

>      }

>  };

> diff --git a/include/hw/i2c/pm_smbus.h b/include/hw/i2c/pm_smbus.h

> index 7bcca97672..fb55c44444 100644

> --- a/include/hw/i2c/pm_smbus.h

> +++ b/include/hw/i2c/pm_smbus.h

> @@ -43,4 +43,13 @@ typedef struct PMSMBus {

>  

>  void pm_smbus_init(DeviceState *parent, PMSMBus *smb, bool force_aux_blk);

>  

> +/*

> + * For backwards compatibility on migration, older versions don't have

> + * working migration for pm_smbus, this lets us ignore the migrations

> + * for older machine versions.

> + */

> +bool pm_smbus_vmstate_needed(void);

> +

> +extern const VMStateDescription pmsmb_vmstate;

> +

>  #endif /* PM_SMBUS_H */

> -- 

> 2.17.1

> 

--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
diff mbox series

Patch

diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index 2f4dd03b83..91fe4821d3 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -302,6 +302,11 @@  static const VMStateDescription vmstate_cpuhp_state = {
     }
 };
 
+static bool piix4_vmstate_need_smbus(void *opaque, int version_id)
+{
+    return pm_smbus_vmstate_needed();
+}
+
 /* qemu-kvm 1.2 uses version 3 but advertised as 2
  * To support incoming qemu-kvm 1.2 migration, change version_id
  * and minimum_version_id to 2 below (which breaks migration from
@@ -321,6 +326,8 @@  static const VMStateDescription vmstate_acpi = {
         VMSTATE_UINT16(ar.pm1.evt.en, PIIX4PMState),
         VMSTATE_UINT16(ar.pm1.cnt.cnt, PIIX4PMState),
         VMSTATE_STRUCT(apm, PIIX4PMState, 0, vmstate_apm, APMState),
+        VMSTATE_STRUCT_TEST(smb, PIIX4PMState, piix4_vmstate_need_smbus, 3,
+                            pmsmb_vmstate, PMSMBus),
         VMSTATE_TIMER_PTR(ar.tmr.timer, PIIX4PMState),
         VMSTATE_INT64(ar.tmr.overflow_time, PIIX4PMState),
         VMSTATE_STRUCT(ar.gpe, PIIX4PMState, 2, vmstate_gpe, ACPIGPE),
diff --git a/hw/i2c/pm_smbus.c b/hw/i2c/pm_smbus.c
index 8793113c25..2a9bc6e8c0 100644
--- a/hw/i2c/pm_smbus.c
+++ b/hw/i2c/pm_smbus.c
@@ -19,6 +19,7 @@ 
  */
 #include "qemu/osdep.h"
 #include "hw/hw.h"
+#include "hw/boards.h"
 #include "hw/i2c/pm_smbus.h"
 #include "hw/i2c/smbus_master.h"
 
@@ -450,6 +451,36 @@  static const MemoryRegionOps pm_smbus_ops = {
     .endianness = DEVICE_LITTLE_ENDIAN,
 };
 
+bool pm_smbus_vmstate_needed(void)
+{
+    MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
+
+    return !mc->smbus_no_migration_support;
+}
+
+const VMStateDescription pmsmb_vmstate = {
+    .name = "pmsmb",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT8(smb_stat, PMSMBus),
+        VMSTATE_UINT8(smb_ctl, PMSMBus),
+        VMSTATE_UINT8(smb_cmd, PMSMBus),
+        VMSTATE_UINT8(smb_addr, PMSMBus),
+        VMSTATE_UINT8(smb_data0, PMSMBus),
+        VMSTATE_UINT8(smb_data1, PMSMBus),
+        VMSTATE_UINT32(smb_index, PMSMBus),
+        VMSTATE_UINT8_ARRAY(smb_data, PMSMBus, PM_SMBUS_MAX_MSG_SIZE),
+        VMSTATE_UINT8(smb_auxctl, PMSMBus),
+        VMSTATE_UINT8(smb_blkdata, PMSMBus),
+        VMSTATE_BOOL(i2c_enable, PMSMBus),
+        VMSTATE_BOOL(op_done, PMSMBus),
+        VMSTATE_BOOL(in_i2c_block_read, PMSMBus),
+        VMSTATE_BOOL(start_transaction_on_status_read, PMSMBus),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 void pm_smbus_init(DeviceState *parent, PMSMBus *smb, bool force_aux_blk)
 {
     smb->op_done = true;
diff --git a/hw/i2c/smbus_ich9.c b/hw/i2c/smbus_ich9.c
index e6d8d28194..7b24be8256 100644
--- a/hw/i2c/smbus_ich9.c
+++ b/hw/i2c/smbus_ich9.c
@@ -43,12 +43,20 @@  typedef struct ICH9SMBState {
     PMSMBus smb;
 } ICH9SMBState;
 
+static bool ich9_vmstate_need_smbus(void *opaque, int version_id)
+{
+    return pm_smbus_vmstate_needed();
+}
+
 static const VMStateDescription vmstate_ich9_smbus = {
     .name = "ich9_smb",
     .version_id = 1,
     .minimum_version_id = 1,
     .fields = (VMStateField[]) {
-        VMSTATE_PCI_DEVICE(dev, struct ICH9SMBState),
+        VMSTATE_PCI_DEVICE(dev, ICH9SMBState),
+        VMSTATE_BOOL_TEST(irq_enabled, ICH9SMBState, ich9_vmstate_need_smbus),
+        VMSTATE_STRUCT_TEST(smb, ICH9SMBState, ich9_vmstate_need_smbus, 1,
+                            pmsmb_vmstate, PMSMBus),
         VMSTATE_END_OF_LIST()
     }
 };
diff --git a/include/hw/i2c/pm_smbus.h b/include/hw/i2c/pm_smbus.h
index 7bcca97672..fb55c44444 100644
--- a/include/hw/i2c/pm_smbus.h
+++ b/include/hw/i2c/pm_smbus.h
@@ -43,4 +43,13 @@  typedef struct PMSMBus {
 
 void pm_smbus_init(DeviceState *parent, PMSMBus *smb, bool force_aux_blk);
 
+/*
+ * For backwards compatibility on migration, older versions don't have
+ * working migration for pm_smbus, this lets us ignore the migrations
+ * for older machine versions.
+ */
+bool pm_smbus_vmstate_needed(void);
+
+extern const VMStateDescription pmsmb_vmstate;
+
 #endif /* PM_SMBUS_H */