[igt-dev] [Intel-gfx] [PATCH i-g-t] intel_l3_parity: Restore support for Ivybridge

[Ville Syrjälä]

On Thu, Jul 11, 2019 at 03:10:04PM +0100, Chris Wilson wrote:
> With the fancy second slice of Haswell, we lost support for Ivybridge
> with its paltry single slice.
> 
> Fixes: 8ddcfd6882a9 ("intel_l3_parity: slice support")
> Testcase: igt/tools_test/sysfs_l3_parity
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

Looks sane.

I wonder if anyone ever used this feature...

> ---
>  tools/intel_l3_parity.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/tools/intel_l3_parity.c b/tools/intel_l3_parity.c
> index d8c997af9..dc3d08048 100644
> --- a/tools/intel_l3_parity.c
> +++ b/tools/intel_l3_parity.c
> @@ -195,6 +195,9 @@ int main(int argc, char *argv[])
>  
>  	for_each_slice(i) {
>  		fd[i] = openat(dir, path[i], O_RDWR);
> +		if (fd[i] < 0)
> +			continue;
> +
>  		if (read(fd[i], l3logs[i], NUM_REGS * sizeof(uint32_t)) < 0) {
>  			perror(path[i]);
>  			exit(77);
> @@ -333,6 +336,9 @@ int main(int argc, char *argv[])
>  
>  	/* Per slice operations */
>  	for_each_slice(i) {
> +		if (fd[i] < 0)
> +			continue;
> +
>  		switch (action) {
>  			case 'l':
>  				dumpit(i);
> @@ -374,6 +380,9 @@ int main(int argc, char *argv[])
>  		exit(EXIT_SUCCESS);
>  
>  	for_each_slice(i) {
> +		if (fd[i] < 0)
> +			continue;
> +
>  		ret = write(fd[i], l3logs[i], NUM_REGS * sizeof(uint32_t));
>  		if (ret == -1) {
>  			perror("Writing sysfs");
> -- 
> 2.22.0
> 
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-- 
Ville Syrjälä
Intel