Re: [PATCH 1/4] iommu/vt-d: Enable write protect for supervisor SVM

Hi Jacob, I love your patch! Yet something to improve: [auto build test ERROR on iommu/next] [also build test ERROR on linux/master linus/master v5.12-rc1 next-20210303] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base'

Re: [PATCH 1/4] iommu/vt-d: Enable write protect for supervisor SVM

Hi Lu, On Sat, 20 Feb 2021 09:56:26 +0800, Lu Baolu wrote: > Hi Jacob and Sanjay, > > On 2/19/21 5:31 AM, Jacob Pan wrote: > > Write protect bit, when set, inhibits supervisor writes to the read-only > > pages. In supervisor shared virtual addressing (SVA), where page tables > > are shared

Re: [PATCH 1/4] iommu/vt-d: Enable write protect for supervisor SVM

Hi Jacob and Sanjay, On 2/19/21 5:31 AM, Jacob Pan wrote: Write protect bit, when set, inhibits supervisor writes to the read-only pages. In supervisor shared virtual addressing (SVA), where page tables are shared between CPU and DMA, IOMMU PASID entry WPE bit should match CR0.WP bit in the

[PATCH 1/4] iommu/vt-d: Enable write protect for supervisor SVM

Write protect bit, when set, inhibits supervisor writes to the read-only pages. In supervisor shared virtual addressing (SVA), where page tables are shared between CPU and DMA, IOMMU PASID entry WPE bit should match CR0.WP bit in the CPU. This patch sets WPE bit for supervisor PASIDs if CR0.WP is