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esp: include the current PDMA callback in the migration stream 

This involves (re)adding a PDMA-specific subsection to hold the reference to the
current PDMA callback.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20220305155530.9265-10-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
This commit is contained in:
Mark Cave-Ayland 2022-03-05 15:55:29 +00:00
parent 77987ef5a3
commit eda59b392d
1 changed files with 31 additions and 0 deletions
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31
hw/scsi/esp.c
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@ -1209,6 +1209,33 @@ static int esp_post_load(void *opaque, int version_id)
return 0;
}
/*
* PDMA (or pseudo-DMA) is only used on the Macintosh and requires the
* guest CPU to perform the transfers between the SCSI bus and memory
* itself. This is indicated by the dma_memory_read and dma_memory_write
* functions being NULL (in contrast to the ESP PCI device) whilst
* dma_enabled is still set.
*/
static bool esp_pdma_needed(void *opaque)
{
ESPState *s = ESP(opaque);
return s->dma_memory_read == NULL && s->dma_memory_write == NULL &&
s->dma_enabled;
}
static const VMStateDescription vmstate_esp_pdma = {
.name = "esp/pdma",
.version_id = 0,
.minimum_version_id = 0,
.needed = esp_pdma_needed,
.fields = (VMStateField[]) {
VMSTATE_UINT8(pdma_cb, ESPState),
VMSTATE_END_OF_LIST()
}
};
const VMStateDescription vmstate_esp = {
.name = "esp",
.version_id = 6,
@ -1243,6 +1270,10 @@ const VMStateDescription vmstate_esp = {
VMSTATE_UINT8_TEST(lun, ESPState, esp_is_version_6),
VMSTATE_END_OF_LIST()
},
.subsections = (const VMStateDescription * []) {
&vmstate_esp_pdma,
NULL
}
};
static void sysbus_esp_mem_write(void *opaque, hwaddr addr,