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

[Jason Wang <jasowang@redhat.com>]

On 08/31/2015 03:28 PM, Michael S. Tsirkin wrote:
> 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.

But I get:

...
portio-no-eventfd:pci-io 5024
portio-wildcard-eventfd:pci-io 1731
portio-datamatch-eventfd:pci-io 1731
portio-nodata-eventfd:pci-io 4967
...

>>>  };
>>>  
>>>  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 ...
>

I mean for example having both datamatch and wildcard eventfds in a
single subtest. E.g in "datamatch-eventfd", registering 1 or more
wildcard eventfd before doing the real tests.