Re: [PATCH] drm/ast: Fixed CVE for DP501

2020-11-26 Thread Daniel Vetter
On Thu, Nov 26, 2020 at 1:51 PM Thomas Zimmermann wrote: > > Hi, > > please see below for a review. > > Am 25.11.20 um 10:09 schrieb KuoHsiang Chou: > > [Bug][DP501] > > 1. For security concerning, P2A have to be disabled by CVE regulation. > > 2. FrameBuffer reverses last 2MB used for the image o

Re: [PATCH] drm/ast: Fixed CVE for DP501

2020-11-26 Thread Thomas Zimmermann
Hi, please see below for a review. Am 25.11.20 um 10:09 schrieb KuoHsiang Chou: [Bug][DP501] 1. For security concerning, P2A have to be disabled by CVE regulation. 2. FrameBuffer reverses last 2MB used for the image of DP501 3. If P2A is disallowed, the default "ioremap()" behavior is non-cache

[PATCH] drm/ast: Fixed CVE for DP501

2020-11-25 Thread KuoHsiang Chou
[Bug][DP501] 1. For security concerning, P2A have to be disabled by CVE regulation. 2. FrameBuffer reverses last 2MB used for the image of DP501. 3. If P2A is disallowed, the default "ioremap()" behavior is non-cached and could be an alternative accessing on the image of DP501. --- drivers/gpu/