From 0bd005be782d9492afe3cc6fc494d8c3b477e5b8 Mon Sep 17 00:00:00 2001 From: Mark Cave-Ayland Date: Thu, 4 Mar 2021 22:10:25 +0000 Subject: [PATCH] esp: add vmstate_esp version to embedded ESPState MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The QOM object representing ESPState is currently embedded within both the SYSBUS_ESP and PCI_ESP devices with migration state handled by embedding vmstate_esp within each device using VMSTATE_STRUCT. Since the vmstate_esp fields are embedded directly within the migration stream, the incoming vmstate_esp version_id is lost. The only version information available is that from vmstate_sysbus_esp_scsi and vmstate_esp_pci_scsi, but those versions represent their respective devices and not that of the underlying ESPState. Resolve this by adding a new version-dependent field in vmstate_sysbus_esp_scsi and vmstate_esp_pci_scsi which stores the vmstate_esp version_id field within ESPState to be used to allow migration from older QEMU versions. Finally bump the vmstate_esp version to 5 to cover the upcoming ESPState changes within this patch series. Signed-off-by: Mark Cave-Ayland Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Laurent Vivier Message-Id: <20210304221103.6369-5-mark.cave-ayland@ilande.co.uk> --- hw/scsi/esp-pci.c | 3 ++- hw/scsi/esp.c | 23 +++++++++++++++++++++-- include/hw/scsi/esp.h | 2 ++ 3 files changed, 25 insertions(+), 3 deletions(-) diff --git a/hw/scsi/esp-pci.c b/hw/scsi/esp-pci.c index 27a0d36e0b..c3d3dab05e 100644 --- a/hw/scsi/esp-pci.c +++ b/hw/scsi/esp-pci.c @@ -330,11 +330,12 @@ static void esp_pci_hard_reset(DeviceState *dev) static const VMStateDescription vmstate_esp_pci_scsi = { .name = "pciespscsi", - .version_id = 1, + .version_id = 2, .minimum_version_id = 1, .fields = (VMStateField[]) { VMSTATE_PCI_DEVICE(parent_obj, PCIESPState), VMSTATE_BUFFER_UNSAFE(dma_regs, PCIESPState, 0, 8 * sizeof(uint32_t)), + VMSTATE_UINT8_V(esp.mig_version_id, PCIESPState, 2), VMSTATE_STRUCT(esp, PCIESPState, 0, vmstate_esp, ESPState), VMSTATE_END_OF_LIST() } diff --git a/hw/scsi/esp.c b/hw/scsi/esp.c index 6f8a1d1224..f65c675872 100644 --- a/hw/scsi/esp.c +++ b/hw/scsi/esp.c @@ -795,10 +795,28 @@ static const VMStateDescription vmstate_esp_pdma = { } }; +static int esp_pre_save(void *opaque) +{ + ESPState *s = ESP(opaque); + + s->mig_version_id = vmstate_esp.version_id; + return 0; +} + +static int esp_post_load(void *opaque, int version_id) +{ + ESPState *s = ESP(opaque); + + s->mig_version_id = vmstate_esp.version_id; + return 0; +} + const VMStateDescription vmstate_esp = { .name = "esp", - .version_id = 4, + .version_id = 5, .minimum_version_id = 3, + .pre_save = esp_pre_save, + .post_load = esp_post_load, .fields = (VMStateField[]) { VMSTATE_BUFFER(rregs, ESPState), VMSTATE_BUFFER(wregs, ESPState), @@ -997,9 +1015,10 @@ static void sysbus_esp_init(Object *obj) static const VMStateDescription vmstate_sysbus_esp_scsi = { .name = "sysbusespscsi", - .version_id = 1, + .version_id = 2, .minimum_version_id = 1, .fields = (VMStateField[]) { + VMSTATE_UINT8_V(esp.mig_version_id, SysBusESPState, 2), VMSTATE_STRUCT(esp, SysBusESPState, 0, vmstate_esp, ESPState), VMSTATE_END_OF_LIST() } diff --git a/include/hw/scsi/esp.h b/include/hw/scsi/esp.h index af23f813cb..9d149cbc9f 100644 --- a/include/hw/scsi/esp.h +++ b/include/hw/scsi/esp.h @@ -68,6 +68,8 @@ struct ESPState { uint32_t pdma_start; uint32_t pdma_cur; void (*pdma_cb)(ESPState *s); + + uint8_t mig_version_id; }; #define TYPE_SYSBUS_ESP "sysbus-esp"