From 56722a4398a306585ca3ed39ff54fc907af98618 Mon Sep 17 00:00:00 2001 From: Jacob Pan Date: Sat, 16 May 2020 14:20:47 +0800 Subject: iommu/vt-d: Add bind guest PASID support When supporting guest SVA with emulated IOMMU, the guest PASID table is shadowed in VMM. Updates to guest vIOMMU PASID table will result in PASID cache flush which will be passed down to the host as bind guest PASID calls. For the SL page tables, it will be harvested from device's default domain (request w/o PASID), or aux domain in case of mediated device. .-------------. .---------------------------. | vIOMMU | | Guest process CR3, FL only| | | '---------------------------' .----------------/ | PASID Entry |--- PASID cache flush - '-------------' | | | V | | CR3 in GPA '-------------' Guest ------| Shadow |--------------------------|-------- v v v Host .-------------. .----------------------. | pIOMMU | | Bind FL for GVA-GPA | | | '----------------------' .----------------/ | | PASID Entry | V (Nested xlate) '----------------\.------------------------------. | | |SL for GPA-HPA, default domain| | | '------------------------------' '-------------' Where: - FL = First level/stage one page tables - SL = Second level/stage two page tables Signed-off-by: Jacob Pan Signed-off-by: Liu Yi L Signed-off-by: Lu Baolu Link: https://lore.kernel.org/r/20200516062101.29541-5-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel --- include/linux/intel-svm.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'include/linux/intel-svm.h') diff --git a/include/linux/intel-svm.h b/include/linux/intel-svm.h index d7c403d0dd27..1b47ca46373e 100644 --- a/include/linux/intel-svm.h +++ b/include/linux/intel-svm.h @@ -44,6 +44,18 @@ struct svm_dev_ops { * do such IOTLB flushes automatically. */ #define SVM_FLAG_SUPERVISOR_MODE (1<<1) +/* + * The SVM_FLAG_GUEST_MODE flag is used when a PASID bind is for guest + * processes. Compared to the host bind, the primary differences are: + * 1. mm life cycle management + * 2. fault reporting + */ +#define SVM_FLAG_GUEST_MODE (1<<2) +/* + * The SVM_FLAG_GUEST_PASID flag is used when a guest has its own PASID space, + * which requires guest and host PASID translation at both directions. + */ +#define SVM_FLAG_GUEST_PASID (1<<3) #ifdef CONFIG_INTEL_IOMMU_SVM -- cgit v1.2.3