Re: [PATCH] iommu/vt-d: Force to flush iotlb before creating superpage

...@lists.linux-foundation.org; linux-kernel@vger.kernel.org Cc: baolu...@linux.intel.com; David Woodhouse ; Nadav Amit ; Alex Williamson ; Kevin Tian ; Gonglei (Arei) ; sta...@vger.kernel.org Subject: Re: [PATCH] iommu/vt-d: Force to flush iotlb before creating superpage Hi Longpeng, On 4/7/21 2

RE: [PATCH] iommu/vt-d: Force to flush iotlb before creating superpage

lu...@linux.intel.com; David Woodhouse ; Nadav > Amit ; Alex Williamson ; > Kevin Tian ; Gonglei (Arei) ; > sta...@vger.kernel.org > Subject: Re: [PATCH] iommu/vt-d: Force to flush iotlb before creating > superpage > > Hi Longpeng, > > On 4/7/21 2:35 PM, Longpeng (M

Re: [PATCH] iommu/vt-d: Force to flush iotlb before creating superpage

...@lists.linux-foundation.org; linux-kernel@vger.kernel.org Cc: baolu...@linux.intel.com; David Woodhouse ; Nadav Amit ; Alex Williamson ; Kevin Tian ; Gonglei (Arei) ; sta...@vger.kernel.org Subject: Re: [PATCH] iommu/vt-d: Force to flush iotlb before creating superpage Hi Longpeng, On 4/1/21 3:18

RE: [PATCH] iommu/vt-d: Force to flush iotlb before creating superpage

lu...@linux.intel.com; David Woodhouse ; Nadav > Amit ; Alex Williamson ; > Kevin Tian ; Gonglei (Arei) ; > sta...@vger.kernel.org > Subject: Re: [PATCH] iommu/vt-d: Force to flush iotlb before creating > superpage > > Hi Longpeng, > > On 4/1/21 3:18 PM, Longpeng(Mike) wro

Re: [PATCH] iommu/vt-d: Force to flush iotlb before creating superpage

On 4/2/21 11:41 AM, Longpeng (Mike, Cloud Infrastructure Service Product Dept.) wrote: Hi Baolu, 在 2021/4/2 11:06, Lu Baolu 写道: Hi Longpeng, On 4/1/21 3:18 PM, Longpeng(Mike) wrote: The translation caches may preserve obsolete data when the mapping size is changed, suppose the following seque

Re: [PATCH] iommu/vt-d: Force to flush iotlb before creating superpage

Hi Longpeng, On 4/1/21 3:18 PM, Longpeng(Mike) wrote: diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index ee09323..cbcb434 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -2342,9 +2342,20 @@ static inline int hardware_largepage_caps(struct

Re: [PATCH] iommu/vt-d: Force to flush iotlb before creating superpage

Hi Baolu, 在 2021/4/2 11:06, Lu Baolu 写道: > Hi Longpeng, > > On 4/1/21 3:18 PM, Longpeng(Mike) wrote: >> The translation caches may preserve obsolete data when the >> mapping size is changed, suppose the following sequence which >> can reveal the problem with high probability. >> >> 1.mmap(4GB,MAP

Re: [PATCH] iommu/vt-d: Force to flush iotlb before creating superpage

Hi Longpeng, On 4/1/21 3:18 PM, Longpeng(Mike) wrote: The translation caches may preserve obsolete data when the mapping size is changed, suppose the following sequence which can reveal the problem with high probability. 1.mmap(4GB,MAP_HUGETLB) 2. while (1) { (a)DMA MAP 0,0xa