From 2d7d06d847b78fc1487a1b8908a823089c6a53b6 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Herv=C3=A9=20Poussineau?= Date: Thu, 25 Feb 2016 13:02:11 +0100 Subject: dbdma: warn when using unassigned channel MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit With this, it's easier to know if a guest uses an invalid and/or unimplemented DMA channel. Signed-off-by: Hervé Poussineau Reviewed-by: Thomas Huth Acked-by: Mark Cave-Ayland Signed-off-by: David Gibson --- hw/misc/macio/mac_dbdma.c | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-) (limited to 'hw/misc') diff --git a/hw/misc/macio/mac_dbdma.c b/hw/misc/macio/mac_dbdma.c index d81dea7b0d..6051f17dbd 100644 --- a/hw/misc/macio/mac_dbdma.c +++ b/hw/misc/macio/mac_dbdma.c @@ -557,11 +557,13 @@ void DBDMA_register_channel(void *dbdma, int nchan, qemu_irq irq, DBDMA_DPRINTF("DBDMA_register_channel 0x%x\n", nchan); + assert(rw); + assert(flush); + ch->irq = irq; ch->rw = rw; ch->flush = flush; ch->io.opaque = opaque; - ch->io.channel = ch; } static void @@ -775,6 +777,20 @@ static void dbdma_reset(void *opaque) memset(s->channels[i].regs, 0, DBDMA_SIZE); } +static void dbdma_unassigned_rw(DBDMA_io *io) +{ + DBDMA_channel *ch = io->channel; + qemu_log_mask(LOG_GUEST_ERROR, "%s: use of unassigned channel %d\n", + __func__, ch->channel); +} + +static void dbdma_unassigned_flush(DBDMA_io *io) +{ + DBDMA_channel *ch = io->channel; + qemu_log_mask(LOG_GUEST_ERROR, "%s: use of unassigned channel %d\n", + __func__, ch->channel); +} + void* DBDMA_init (MemoryRegion **dbdma_mem) { DBDMAState *s; @@ -784,8 +800,13 @@ void* DBDMA_init (MemoryRegion **dbdma_mem) for (i = 0; i < DBDMA_CHANNELS; i++) { DBDMA_io *io = &s->channels[i].io; + DBDMA_channel *ch = &s->channels[i]; qemu_iovec_init(&io->iov, 1); - s->channels[i].channel = i; + + ch->rw = dbdma_unassigned_rw; + ch->flush = dbdma_unassigned_flush; + ch->channel = i; + ch->io.channel = ch; } memory_region_init_io(&s->mem, NULL, &dbdma_ops, s, "dbdma", 0x1000); -- cgit v1.2.3