Re: [PATCH v8 3/7] swiotlb: Zero out bounce buffer for untrusted device

From: Lu Baolu
Date: Sun Sep 01 2019 - 22:01:29 EST

Hi Christoph,

On 8/30/19 3:31 PM, Christoph Hellwig wrote:
On Fri, Aug 30, 2019 at 03:17:14PM +0800, Lu Baolu wrote:
+#include <linux/pci.h>

+ if (dev_is_untrusted(hwdev) && zero_size)
+ memset(zero_addr, 0, zero_size);

As said before swiotlb must not grow pci dependencies like this.

I understand your concern. I will try to remove this dependency in the
next version.

Please move the untrusted flag to struct device.

The untrusted flag is introduced in another series. I agree that we
could consider to move it to struct device, but I think making it
in a separated patch looks better.

Best regards,
Lu Baolu