RE: [PATCH 1/1] iommu/vt-d: Use second level for GPA->HPA translation

> From: Lu Baolu > Sent: Sunday, September 26, 2021 10:43 AM > > Hi Kevin, > > Thanks for reviewing my patch. > > On 9/24/21 11:16 AM, Tian, Kevin wrote: > >> From: Lu Baolu > >> Sent: Friday, September 24, 2021 10:30 AM > >> > >> The IOMMU VT-d implementation uses the first level for GPA->HPA

Re: [PATCH 1/1] iommu/vt-d: Use second level for GPA->HPA translation

Hi Kevin, Thanks for reviewing my patch. On 9/24/21 11:16 AM, Tian, Kevin wrote: From: Lu Baolu Sent: Friday, September 24, 2021 10:30 AM The IOMMU VT-d implementation uses the first level for GPA->HPA translation by default. Although both the first level and the second level could handle the

Re: [PATCH 5/8] x86/mmu: Add mm-based PASID refcounting

Fenghua, On Fri, Sep 24 2021 at 16:12, Fenghua Yu wrote: > On Fri, Sep 24, 2021 at 03:18:12PM +0200, Thomas Gleixner wrote: >> But OTOH why do you need a per task reference count on the PASID at all? >> >> The PASID is fundamentaly tied to the mm and the mm can't go away before >> the threads hav

[PATCH v4] iommu/amd: Use report_iommu_fault()

This patch makes iommu/amd call report_iommu_fault() when an I/O page fault occurs, which has two effects: 1) It allows device drivers to register a callback to be notified of I/O page faults, via the iommu_set_fault_handler() API. 2) It triggers the io_page_fault tracepoint in report_iommu_fa

Re: [PATCH v2] iommu/amd: Use report_iommu_fault()

On Sat, Aug 21, 2021 at 06:44:39PM +0300, Lennert Buytenhek wrote: > > > - EVENT_FLAG_I unset, but the request was a translation request > > > (EVENT_FLAG_TR set) or the target page was not present > > > (EVENT_FLAG_PR unset): call report_iommu_fault(), but the RW > > > bit will be invalid,