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[RFC v2 11/22] intel_iommu: process pasid cache invalidation
From: |
Liu Yi L |
Subject: |
[RFC v2 11/22] intel_iommu: process pasid cache invalidation |
Date: |
Thu, 24 Oct 2019 08:34:32 -0400 |
This patch adds PASID cache invalidation handling. When guest enabled
PASID usages (e.g. SVA), guest software should issue a proper PASID
cache invalidation when caching-mode is exposed. This patch only adds
the draft handling of pasid cache invalidation. Detailed handling will
be added in subsequent patches.
Cc: Kevin Tian <address@hidden>
Cc: Jacob Pan <address@hidden>
Cc: Peter Xu <address@hidden>
Cc: Yi Sun <address@hidden>
Signed-off-by: Liu Yi L <address@hidden>
---
hw/i386/intel_iommu.c | 66 ++++++++++++++++++++++++++++++++++++++----
hw/i386/intel_iommu_internal.h | 12 ++++++++
hw/i386/trace-events | 3 ++
3 files changed, 76 insertions(+), 5 deletions(-)
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 88b843f..84ff6f0 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -2335,6 +2335,63 @@ static bool vtd_process_iotlb_desc(IntelIOMMUState *s,
VTDInvDesc *inv_desc)
return true;
}
+static int vtd_pasid_cache_dsi(IntelIOMMUState *s, uint16_t domain_id)
+{
+ return 0;
+}
+
+static int vtd_pasid_cache_psi(IntelIOMMUState *s,
+ uint16_t domain_id, uint32_t pasid)
+{
+ return 0;
+}
+
+static int vtd_pasid_cache_gsi(IntelIOMMUState *s)
+{
+ return 0;
+}
+
+static bool vtd_process_pasid_desc(IntelIOMMUState *s,
+ VTDInvDesc *inv_desc)
+{
+ uint16_t domain_id;
+ uint32_t pasid;
+ int ret = 0;
+
+ if ((inv_desc->val[0] & VTD_INV_DESC_PASIDC_RSVD_VAL0) ||
+ (inv_desc->val[1] & VTD_INV_DESC_PASIDC_RSVD_VAL1) ||
+ (inv_desc->val[2] & VTD_INV_DESC_PASIDC_RSVD_VAL2) ||
+ (inv_desc->val[3] & VTD_INV_DESC_PASIDC_RSVD_VAL3)) {
+ error_report_once("non-zero-field-in-pc_inv_desc hi: 0x%" PRIx64
+ " lo: 0x%" PRIx64, inv_desc->val[1], inv_desc->val[0]);
+ return false;
+ }
+
+ domain_id = VTD_INV_DESC_PASIDC_DID(inv_desc->val[0]);
+ pasid = VTD_INV_DESC_PASIDC_PASID(inv_desc->val[0]);
+
+ switch (inv_desc->val[0] & VTD_INV_DESC_PASIDC_G) {
+ case VTD_INV_DESC_PASIDC_DSI:
+ ret = vtd_pasid_cache_dsi(s, domain_id);
+ break;
+
+ case VTD_INV_DESC_PASIDC_PASID_SI:
+ ret = vtd_pasid_cache_psi(s, domain_id, pasid);
+ break;
+
+ case VTD_INV_DESC_PASIDC_GLOBAL:
+ ret = vtd_pasid_cache_gsi(s);
+ break;
+
+ default:
+ error_report_once("invalid-inv-granu-in-pc_inv_desc hi: 0x%" PRIx64
+ " lo: 0x%" PRIx64, inv_desc->val[1], inv_desc->val[0]);
+ return false;
+ }
+
+ return (ret == 0) ? true : false;
+}
+
static bool vtd_process_inv_iec_desc(IntelIOMMUState *s,
VTDInvDesc *inv_desc)
{
@@ -2441,12 +2498,11 @@ static bool vtd_process_inv_desc(IntelIOMMUState *s)
}
break;
- /*
- * TODO: the entity of below two cases will be implemented in future
series.
- * To make guest (which integrates scalable mode support patch set in
- * iommu driver) work, just return true is enough so far.
- */
case VTD_INV_DESC_PC:
+ trace_vtd_inv_desc("pasid-cache", inv_desc.val[1], inv_desc.val[0]);
+ if (!vtd_process_pasid_desc(s, &inv_desc)) {
+ return false;
+ }
break;
case VTD_INV_DESC_PIOTLB:
diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h
index 8668771..c6cb28b 100644
--- a/hw/i386/intel_iommu_internal.h
+++ b/hw/i386/intel_iommu_internal.h
@@ -445,6 +445,18 @@ typedef union VTDInvDesc VTDInvDesc;
#define VTD_SPTE_LPAGE_L4_RSVD_MASK(aw) \
(0x880ULL | ~(VTD_HAW_MASK(aw) | VTD_SL_IGN_COM))
+#define VTD_INV_DESC_PASIDC_G (3ULL << 4)
+#define VTD_INV_DESC_PASIDC_PASID(val) (((val) >> 32) & 0xfffffULL)
+#define VTD_INV_DESC_PASIDC_DID(val) (((val) >> 16) & VTD_DOMAIN_ID_MASK)
+#define VTD_INV_DESC_PASIDC_RSVD_VAL0 0xfff000000000ffc0ULL
+#define VTD_INV_DESC_PASIDC_RSVD_VAL1 0xffffffffffffffffULL
+#define VTD_INV_DESC_PASIDC_RSVD_VAL2 0xffffffffffffffffULL
+#define VTD_INV_DESC_PASIDC_RSVD_VAL3 0xffffffffffffffffULL
+
+#define VTD_INV_DESC_PASIDC_DSI (0ULL << 4)
+#define VTD_INV_DESC_PASIDC_PASID_SI (1ULL << 4)
+#define VTD_INV_DESC_PASIDC_GLOBAL (3ULL << 4)
+
/* Information about page-selective IOTLB invalidate */
struct VTDIOTLBPageInvInfo {
uint16_t domain_id;
diff --git a/hw/i386/trace-events b/hw/i386/trace-events
index 43c0314..6da8bd2 100644
--- a/hw/i386/trace-events
+++ b/hw/i386/trace-events
@@ -22,6 +22,9 @@ vtd_inv_qi_head(uint16_t head) "read head %d"
vtd_inv_qi_tail(uint16_t head) "write tail %d"
vtd_inv_qi_fetch(void) ""
vtd_context_cache_reset(void) ""
+vtd_pasid_cache_gsi(void) ""
+vtd_pasid_cache_dsi(uint16_t domain) "Domian slective PC invalidation domain
0x%"PRIx16
+vtd_pasid_cache_psi(uint16_t domain, uint32_t pasid) "PASID slective PC
invalidation domain 0x%"PRIx16" pasid 0x%"PRIx32
vtd_re_not_present(uint8_t bus) "Root entry bus %"PRIu8" not present"
vtd_ce_not_present(uint8_t bus, uint8_t devfn) "Context entry bus %"PRIu8"
devfn %"PRIu8" not present"
vtd_iotlb_page_hit(uint16_t sid, uint64_t addr, uint64_t slpte, uint16_t
domain) "IOTLB page hit sid 0x%"PRIx16" iova 0x%"PRIx64" slpte 0x%"PRIx64"
domain 0x%"PRIx16
--
2.7.4
- [RFC v2 01/22] update-linux-headers: Import iommu.h, (continued)
- [RFC v2 01/22] update-linux-headers: Import iommu.h, Liu Yi L, 2019/10/24
- [RFC v2 06/22] hw/pci: modify pci_setup_iommu() to set PCIIOMMUOps, Liu Yi L, 2019/10/24
- [RFC v2 09/22] vfio/pci: add iommu_context notifier for pasid alloc/free, Liu Yi L, 2019/10/24
- [RFC v2 10/22] intel_iommu: add virtual command capability support, Liu Yi L, 2019/10/24
- [RFC v2 05/22] vfio/common: add iommu_ctx_notifier in container, Liu Yi L, 2019/10/24
- [RFC v2 03/22] intel_iommu: modify x-scalable-mode to be string option, Liu Yi L, 2019/10/24
- [RFC v2 04/22] hw/iommu: introduce IOMMUContext, Liu Yi L, 2019/10/24
- [RFC v2 07/22] hw/pci: introduce pci_device_iommu_context(), Liu Yi L, 2019/10/24
- [RFC v2 08/22] intel_iommu: provide get_iommu_context() callback, Liu Yi L, 2019/10/24
- [RFC v2 02/22] header update VFIO/IOMMU vSVA APIs against 5.4.0-rc3+, Liu Yi L, 2019/10/24
- [RFC v2 11/22] intel_iommu: process pasid cache invalidation,
Liu Yi L <=
- [RFC v2 12/22] intel_iommu: add present bit check for pasid table entries, Liu Yi L, 2019/10/24
- [RFC v2 14/22] vfio/pci: add iommu_context notifier for pasid bind/unbind, Liu Yi L, 2019/10/24
- [RFC v2 13/22] intel_iommu: add PASID cache management infrastructure, Liu Yi L, 2019/10/24
- [RFC v2 15/22] intel_iommu: bind/unbind guest page table to host, Liu Yi L, 2019/10/24
- [RFC v2 17/22] intel_iommu: replay pasid binds after context cache invalidation, Liu Yi L, 2019/10/24
- [RFC v2 16/22] intel_iommu: replay guest pasid bindings to host, Liu Yi L, 2019/10/24
- [RFC v2 18/22] intel_iommu: do not passdown pasid bind for PASID #0, Liu Yi L, 2019/10/24
- [RFC v2 19/22] vfio/pci: add iommu_context notifier for PASID-based iotlb flush, Liu Yi L, 2019/10/24
- [RFC v2 20/22] intel_iommu: process PASID-based iotlb invalidation, Liu Yi L, 2019/10/24
- [RFC v2 21/22] intel_iommu: propagate PASID-based iotlb invalidation to host, Liu Yi L, 2019/10/24