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  3. [PATCH V2 0/2] uapi: Add support for GENMASK_U128()
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[PATCH V2 2/2] lib/test_bits.c: Add tests for GENMASK_U128()

Anshuman Khandual posted 2 patches 1 year, 4 months ago
There is a newer version of this series
[PATCH V2 2/2] lib/test_bits.c: Add tests for GENMASK_U128()
Posted by Anshuman Khandual 1 year, 4 months ago 
This adds GENMASK_U128() tests although currently only 64 bit wide masks
are being tested.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
 lib/test_bits.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/lib/test_bits.c b/lib/test_bits.c
index 01313980f175..f0d1033cf3c9 100644
--- a/lib/test_bits.c
+++ b/lib/test_bits.c
@@ -39,6 +39,26 @@ static void genmask_ull_test(struct kunit *test)
 #endif
 }
 
+#ifdef CONFIG_ARCH_SUPPORTS_INT128
+static void genmask_u128_test(struct kunit *test)
+{
+	/* Tests mask generation only when the mask width is within 64 bits */
+	KUNIT_EXPECT_EQ(test, 0x0000000000ff0000ULL, GENMASK_U128(87, 80) >> 64);
+	KUNIT_EXPECT_EQ(test, 0x0000000000ffffffULL, GENMASK_U128(87, 64) >> 64);
+	KUNIT_EXPECT_EQ(test, 0x0000000000000001ULL, GENMASK_U128(0, 0));
+	KUNIT_EXPECT_EQ(test, 0xffffffffffffffffULL, GENMASK_U128(63, 0));
+	KUNIT_EXPECT_EQ(test, 0xffffffffffffffffULL, GENMASK_U128(64, 0) >> 1);
+	KUNIT_EXPECT_EQ(test, 0x00000000ffffffffULL, GENMASK_U128(81, 50) >> 50);
+
+#ifdef TEST_GENMASK_FAILURES
+	/* these should fail compilation */
+	GENMASK_U128(0, 1);
+	GENMASK_U128(0, 10);
+	GENMASK_U128(9, 10);
+#endif
+}
+#endif
+
 static void genmask_input_check_test(struct kunit *test)
 {
 	unsigned int x, y;
@@ -56,12 +76,17 @@ static void genmask_input_check_test(struct kunit *test)
 	/* Valid input */
 	KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(1, 1));
 	KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(39, 21));
+	KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(100, 80));
+	KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(110, 65));
 }
 
 
 static struct kunit_case bits_test_cases[] = {
 	KUNIT_CASE(genmask_test),
 	KUNIT_CASE(genmask_ull_test),
+#ifdef CONFIG_ARCH_SUPPORTS_INT128
+	KUNIT_CASE(genmask_u128_test),
+#endif
 	KUNIT_CASE(genmask_input_check_test),
 	{}
 };
-- 
2.30.2
Re: [PATCH V2 2/2] lib/test_bits.c: Add tests for GENMASK_U128()
Posted by Yury Norov 1 year, 4 months ago 
On Thu, Jul 25, 2024 at 11:18:08AM +0530, Anshuman Khandual wrote:
> This adds GENMASK_U128() tests although currently only 64 bit wide masks
> are being tested.
> 
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: linux-kernel@vger.kernel.org
> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
> ---
>  lib/test_bits.c | 25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
> 
> diff --git a/lib/test_bits.c b/lib/test_bits.c
> index 01313980f175..f0d1033cf3c9 100644
> --- a/lib/test_bits.c
> +++ b/lib/test_bits.c
> @@ -39,6 +39,26 @@ static void genmask_ull_test(struct kunit *test)
>  #endif
>  }
>  
> +#ifdef CONFIG_ARCH_SUPPORTS_INT128

Can you move this ifdefery inside the function scope, so that you'll
not have do it below in tests array declarattion?

> +static void genmask_u128_test(struct kunit *test)
> +{
> +	/* Tests mask generation only when the mask width is within 64 bits */
> +	KUNIT_EXPECT_EQ(test, 0x0000000000ff0000ULL, GENMASK_U128(87, 80) >> 64);
> +	KUNIT_EXPECT_EQ(test, 0x0000000000ffffffULL, GENMASK_U128(87, 64) >> 64);
> +	KUNIT_EXPECT_EQ(test, 0x0000000000000001ULL, GENMASK_U128(0, 0));
> +	KUNIT_EXPECT_EQ(test, 0xffffffffffffffffULL, GENMASK_U128(63, 0));
> +	KUNIT_EXPECT_EQ(test, 0xffffffffffffffffULL, GENMASK_U128(64, 0) >> 1);
> +	KUNIT_EXPECT_EQ(test, 0x00000000ffffffffULL, GENMASK_U128(81, 50) >> 50);
> +
> +#ifdef TEST_GENMASK_FAILURES
> +	/* these should fail compilation */
> +	GENMASK_U128(0, 1);
> +	GENMASK_U128(0, 10);
> +	GENMASK_U128(9, 10);
> +#endif
> +}
> +#endif
> +
>  static void genmask_input_check_test(struct kunit *test)
>  {
>  	unsigned int x, y;
> @@ -56,12 +76,17 @@ static void genmask_input_check_test(struct kunit *test)
>  	/* Valid input */
>  	KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(1, 1));
>  	KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(39, 21));
> +	KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(100, 80));
> +	KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(110, 65));
>  }
>  
>  
>  static struct kunit_case bits_test_cases[] = {
>  	KUNIT_CASE(genmask_test),
>  	KUNIT_CASE(genmask_ull_test),
> +#ifdef CONFIG_ARCH_SUPPORTS_INT128
> +	KUNIT_CASE(genmask_u128_test),
> +#endif
>  	KUNIT_CASE(genmask_input_check_test),
>  	{}
>  };
> -- 
> 2.30.2
Re: [PATCH V2 2/2] lib/test_bits.c: Add tests for GENMASK_U128()
Posted by Anshuman Khandual 1 year, 4 months ago 

On 7/30/24 23:50, Yury Norov wrote:
> On Thu, Jul 25, 2024 at 11:18:08AM +0530, Anshuman Khandual wrote:
>> This adds GENMASK_U128() tests although currently only 64 bit wide masks
>> are being tested.
>>
>> Cc: Andrew Morton <akpm@linux-foundation.org>
>> Cc: linux-kernel@vger.kernel.org
>> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
>> ---
>>  lib/test_bits.c | 25 +++++++++++++++++++++++++
>>  1 file changed, 25 insertions(+)
>>
>> diff --git a/lib/test_bits.c b/lib/test_bits.c
>> index 01313980f175..f0d1033cf3c9 100644
>> --- a/lib/test_bits.c
>> +++ b/lib/test_bits.c
>> @@ -39,6 +39,26 @@ static void genmask_ull_test(struct kunit *test)
>>  #endif
>>  }
>>  
>> +#ifdef CONFIG_ARCH_SUPPORTS_INT128
> 
> Can you move this ifdefery inside the function scope, so that you'll
> not have do it below in tests array declarattion?

Sure, will fold in the following changes in here.

diff --git a/lib/test_bits.c b/lib/test_bits.c
index f0d1033cf3c9..f8b058974d07 100644
--- a/lib/test_bits.c
+++ b/lib/test_bits.c
@@ -39,9 +39,9 @@ static void genmask_ull_test(struct kunit *test)
 #endif
 }
 
-#ifdef CONFIG_ARCH_SUPPORTS_INT128
 static void genmask_u128_test(struct kunit *test)
 {
+#ifdef CONFIG_ARCH_SUPPORTS_INT128
        /* Tests mask generation only when the mask width is within 64 bits */
        KUNIT_EXPECT_EQ(test, 0x0000000000ff0000ULL, GENMASK_U128(87, 80) >> 64);
        KUNIT_EXPECT_EQ(test, 0x0000000000ffffffULL, GENMASK_U128(87, 64) >> 64);
@@ -56,8 +56,8 @@ static void genmask_u128_test(struct kunit *test)
        GENMASK_U128(0, 10);
        GENMASK_U128(9, 10);
 #endif
-}
 #endif
+}
 
 static void genmask_input_check_test(struct kunit *test)
 {
@@ -84,9 +84,7 @@ static void genmask_input_check_test(struct kunit *test)
 static struct kunit_case bits_test_cases[] = {
        KUNIT_CASE(genmask_test),
        KUNIT_CASE(genmask_ull_test),
-#ifdef CONFIG_ARCH_SUPPORTS_INT128
        KUNIT_CASE(genmask_u128_test),
-#endif
        KUNIT_CASE(genmask_input_check_test),
        {}
 };


> 
>> +static void genmask_u128_test(struct kunit *test)
>> +{
>> +	/* Tests mask generation only when the mask width is within 64 bits */
>> +	KUNIT_EXPECT_EQ(test, 0x0000000000ff0000ULL, GENMASK_U128(87, 80) >> 64);
>> +	KUNIT_EXPECT_EQ(test, 0x0000000000ffffffULL, GENMASK_U128(87, 64) >> 64);
>> +	KUNIT_EXPECT_EQ(test, 0x0000000000000001ULL, GENMASK_U128(0, 0));
>> +	KUNIT_EXPECT_EQ(test, 0xffffffffffffffffULL, GENMASK_U128(63, 0));
>> +	KUNIT_EXPECT_EQ(test, 0xffffffffffffffffULL, GENMASK_U128(64, 0) >> 1);
>> +	KUNIT_EXPECT_EQ(test, 0x00000000ffffffffULL, GENMASK_U128(81, 50) >> 50);
>> +
>> +#ifdef TEST_GENMASK_FAILURES
>> +	/* these should fail compilation */
>> +	GENMASK_U128(0, 1);
>> +	GENMASK_U128(0, 10);
>> +	GENMASK_U128(9, 10);
>> +#endif
>> +}
>> +#endif
>> +
>>  static void genmask_input_check_test(struct kunit *test)
>>  {
>>  	unsigned int x, y;
>> @@ -56,12 +76,17 @@ static void genmask_input_check_test(struct kunit *test)
>>  	/* Valid input */
>>  	KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(1, 1));
>>  	KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(39, 21));
>> +	KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(100, 80));
>> +	KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(110, 65));
>>  }
>>  
>>  
>>  static struct kunit_case bits_test_cases[] = {
>>  	KUNIT_CASE(genmask_test),
>>  	KUNIT_CASE(genmask_ull_test),
>> +#ifdef CONFIG_ARCH_SUPPORTS_INT128
>> +	KUNIT_CASE(genmask_u128_test),
>> +#endif
>>  	KUNIT_CASE(genmask_input_check_test),
>>  	{}
>>  };
>> -- 
>> 2.30.2

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