When the state machine is ready to accept command, the bit 7 of the status register (SR) is set to 1. The guest polls the status register and check this bit before writting command to the internal 'Write State Machine' (WSM).
Set SR.7 bit to 1 when the device is created. There is no migration impact by this change. Reference: Read Array Flowchart "Common Flash Interface (CFI) and Command Sets" (Intel Application Note 646) Appendix B "Basic Command Set" Reviewed-by: John Snow <[email protected]> Reviewed-by: Alistair Francis <[email protected]> Regression-tested-by: Laszlo Ersek <[email protected]> Message-Id: <[email protected]> Signed-off-by: Philippe Mathieu-Daudé <[email protected]> --- hw/block/pflash_cfi01.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/block/pflash_cfi01.c b/hw/block/pflash_cfi01.c index db4a246b22..435be1e35c 100644 --- a/hw/block/pflash_cfi01.c +++ b/hw/block/pflash_cfi01.c @@ -777,7 +777,7 @@ static void pflash_cfi01_realize(DeviceState *dev, Error **errp) pfl->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, pflash_timer, pfl); pfl->wcycle = 0; pfl->cmd = 0; - pfl->status = 0; + pfl->status = 0x80; /* WSM ready */ /* Hardcoded CFI table */ /* Standard "QRY" string */ pfl->cfi_table[0x10] = 'Q'; -- 2.20.1
