diff mbox

dbdma: warn when using unassigned channel

Message ID 1456401731-10672-1-git-send-email-hpoussin@reactos.org
State New
Headers show

Commit Message

Hervé Poussineau Feb. 25, 2016, 12:02 p.m. UTC
With this, it's easier to know if a guest uses an invalid and/or unimplemented
DMA channel.

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
---
 hw/misc/macio/mac_dbdma.c | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

Comments

Thomas Huth Feb. 25, 2016, 12:27 p.m. UTC | #1
On 25.02.2016 13:02, Hervé Poussineau wrote:
> With this, it's easier to know if a guest uses an invalid and/or unimplemented
> DMA channel.
> 
> Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
> ---
>  hw/misc/macio/mac_dbdma.c | 25 +++++++++++++++++++++++--
>  1 file changed, 23 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/misc/macio/mac_dbdma.c b/hw/misc/macio/mac_dbdma.c
> index d81dea7..6051f17 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);
> 

Looks reasonable.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Mark Cave-Ayland Feb. 25, 2016, 11:04 p.m. UTC | #2
On 25/02/16 12:02, Hervé Poussineau wrote:

> With this, it's easier to know if a guest uses an invalid and/or unimplemented
> DMA channel.
> 
> Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
> ---
>  hw/misc/macio/mac_dbdma.c | 25 +++++++++++++++++++++++--
>  1 file changed, 23 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/misc/macio/mac_dbdma.c b/hw/misc/macio/mac_dbdma.c
> index d81dea7..6051f17 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);

Acked-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>


ATB,

Mark.
David Gibson Feb. 26, 2016, 5:02 a.m. UTC | #3
On Thu, Feb 25, 2016 at 01:02:11PM +0100, Hervé Poussineau wrote:
> With this, it's easier to know if a guest uses an invalid and/or unimplemented
> DMA channel.
> 
> Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>

Merged to ppc-for-2.6, thanks.

Btw, you're likely to get a prompter response if you CC me directly on
patches you want merged.  I only sometimes have time to go through the
qemu-ppc list looking for things.

> ---
>  hw/misc/macio/mac_dbdma.c | 25 +++++++++++++++++++++++--
>  1 file changed, 23 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/misc/macio/mac_dbdma.c b/hw/misc/macio/mac_dbdma.c
> index d81dea7..6051f17 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);
Thomas Huth March 1, 2016, 6:10 a.m. UTC | #4
On 26.02.2016 06:02, David Gibson wrote:
> On Thu, Feb 25, 2016 at 01:02:11PM +0100, Hervé Poussineau wrote:
>> With this, it's easier to know if a guest uses an invalid and/or unimplemented
>> DMA channel.
>>
>> Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
> 
> Merged to ppc-for-2.6, thanks.
> 
> Btw, you're likely to get a prompter response if you CC me directly on
> patches you want merged.  I only sometimes have time to go through the
> qemu-ppc list looking for things.

 David,

I guess the problem is likely that get_maintainers.pl does not list you
for ppc related stuff except the spapr files. How long is Alex still
going to be away? Maybe you should get listed in some more ppc-related
entries as co-maintainer in the MAINTAINERS file, for the time being?

 Thomas
diff mbox

Patch

diff --git a/hw/misc/macio/mac_dbdma.c b/hw/misc/macio/mac_dbdma.c
index d81dea7..6051f17 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);