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Re: [Qemu-devel] [PATCH v3 10/16] i2c:pm_smbus: Fix state transfer
From: |
Dr. David Alan Gilbert |
Subject: |
Re: [Qemu-devel] [PATCH v3 10/16] i2c:pm_smbus: Fix state transfer |
Date: |
Thu, 29 Nov 2018 12:28:10 +0000 |
User-agent: |
Mutt/1.10.1 (2018-07-13) |
* address@hidden (address@hidden) wrote:
> From: Corey Minyard <address@hidden>
>
> Transfer the state information for the SMBus registers and
> internal data so it will work on a VM transfer.
>
> Signed-off-by: Corey Minyard <address@hidden>
> Cc: Michael S. Tsirkin <address@hidden>
> Cc: Paolo Bonzini <address@hidden>
> Cc: Dr. David Alan Gilbert <address@hidden>
Reviewed-by: Dr. David Alan Gilbert <address@hidden>
> ---
> 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 / address@hidden / Manchester, UK
- [Qemu-devel] [PATCH v3 00/16] Fix/add vmstate handling in some I2C code, minyard, 2018/11/26
- [Qemu-devel] [PATCH v3 03/16] arm:i2c: Don't mask return from i2c_recv(), minyard, 2018/11/26
- [Qemu-devel] [PATCH v3 09/16] migration: Add a VMSTATE_BOOL_TEST() macro, minyard, 2018/11/26
- [Qemu-devel] [PATCH v3 10/16] i2c:pm_smbus: Fix state transfer, minyard, 2018/11/26
- Re: [Qemu-devel] [PATCH v3 10/16] i2c:pm_smbus: Fix state transfer,
Dr. David Alan Gilbert <=
- [Qemu-devel] [PATCH v3 13/16] i2c:smbus_eeprom: Add a size constant for the smbus_eeprom size, minyard, 2018/11/26
- [Qemu-devel] [PATCH v3 04/16] i2c: Don't check return value from i2c_recv(), minyard, 2018/11/26
- [Qemu-devel] [PATCH v3 12/16] i2c:smbus_eeprom: Add normal type name and cast to smbus_eeprom.c, minyard, 2018/11/26
- [Qemu-devel] [PATCH v3 05/16] i2c: Simplify and correct the SMBus state machine, minyard, 2018/11/26
- [Qemu-devel] [PATCH v3 01/16] i2c: Split smbus into parts, minyard, 2018/11/26