Re: [UPDATED] [PATCH 3/5] arm-cci: Get rid of secure transactions for PMU driver

From: Suzuki K. Poulose
Date: Thu Mar 19 2015 - 13:53:01 EST


On 19/03/15 17:38, Sudeep Holla wrote:


On 19/03/15 17:32, Mark Rutland wrote:
One more thing:

@@ -883,7 +894,11 @@ static inline const struct cci_pmu_model *get_cci_model(struct platform_device *
pdev->dev.of_node);
if (!match)
return NULL;
+ if (match->data)
+ return match->data;

+ dev_warn(&pdev->dev, "DEPRECATED compatible property,"
+ "requires secure access to CCI registers");
return probe_cci_model(pdev);
}

Before the probe, could we please have:

if (!IS_ENABLED(CONFIG_ARM))
return -EINVAL;

On arm64 we require a model-specific string, and we shouldn't go
touching secure-only registers.


IIUC platform_has_secure_cci_access always return false for ARM64
preventing any secure access. No ?

Yes, you are right. The check has been abstracted away with the platform_has_secure_cci_access().

Cheers
Suzuki


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/