Re: [Qemu-devel] [PATCH] pci-testdev: add nodata test

["Michael S. Tsirkin" <mst@redhat.com>]

On Mon, Aug 31, 2015 at 11:04:42AM +0800, Jason Wang wrote:
> 
> 
> On 08/27/2015 06:30 PM, Michael S. Tsirkin wrote:
> > Add nodata test where data length is ignored.
> > Skip it for port IO since kvm does not support it there.
> >
> > Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> > ---
> >  hw/misc/pci-testdev.c | 15 ++++++++++++---
> >  1 file changed, 12 insertions(+), 3 deletions(-)
> >
> > diff --git a/hw/misc/pci-testdev.c b/hw/misc/pci-testdev.c
> > index 26b9b86..b6e11d6 100644
> > --- a/hw/misc/pci-testdev.c
> > +++ b/hw/misc/pci-testdev.c
> > @@ -45,6 +45,7 @@ typedef struct IOTest {
> >  
> >  #define IOTEST_DATAMATCH 0xFA
> >  #define IOTEST_NOMATCH   0xCE
> > +#define IOTEST_NODATA  0xAB
> 
> This is never used.
> 
> >  
> >  #define IOTEST_IOSIZE 128
> >  #define IOTEST_MEMSIZE 2048
> > @@ -52,7 +53,8 @@ typedef struct IOTest {
> >  static const char *iotest_test[] = {
> >      "no-eventfd",
> >      "wildcard-eventfd",
> > -    "datamatch-eventfd"
> > +    "datamatch-eventfd",
> > +    "nodata-eventfd"
> 
> For PIO test, "nodata-eventfd" actually means "nodata-noeventfd".

Not really - this test is skipped completely for PIO, as
kvm does not support it.

> >  };
> >  
> >  static const char *iotest_type[] = {
> > @@ -261,12 +263,19 @@ static void pci_testdev_realize(PCIDevice *pci_dev, Error **errp)
> >          memcpy(test->hdr->name, name, strlen(name) + 1);
> >          g_free(name);
> >          test->hdr->offset = cpu_to_le32(IOTEST_SIZE(i) + i * IOTEST_ACCESS_WIDTH);
> > -        test->size = IOTEST_ACCESS_WIDTH;
> > -        test->match_data = strcmp(IOTEST_TEST(i), "wildcard-eventfd");
> > +        test->size = strcmp(IOTEST_TEST(i), "nodata-eventfd") ? IOTEST_ACCESS_WIDTH : 0;
> > +
> > +        test->match_data = strcmp(IOTEST_TEST(i), "wildcard-eventfd") &&
> > +                             strcmp(IOTEST_TEST(i), "nodata-eventfd");
> >          test->hdr->test = i;
> >          test->hdr->data = test->match_data ? IOTEST_DATAMATCH : IOTEST_NOMATCH;
> >          test->hdr->width = IOTEST_ACCESS_WIDTH;
> >          test->mr = IOTEST_REGION(d, i);
> > +
> > +        if (!test->size && !IOTEST_IS_MEM(i)) {
> > +            test->hasnotifier = false;
> > +            continue;
> > +        }
> >          if (!strcmp(IOTEST_TEST(i), "no-eventfd")) {
> >              test->hasnotifier = false;
> >              continue;
> 
> Since you're at this, how about introduce a test that mixes datamatch
> and wildcard?

How do you mean? wildcard means ignore data ...