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iommu/vt-d: Support flushing more translation cache types 

When Shared Virtual Memory is exposed to a guest via vIOMMU, scalable
IOTLB invalidation may be passed down from outside IOMMU subsystems.
This patch adds invalidation functions that can be used for additional
translation cache types.

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Link: https://lore.kernel.org/r/20200516062101.29541-6-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jacob Pan 2020-05-16 14:20:48 +08:00 committed by Joerg Roedel
parent 56722a4398
commit 61a06a16e3
3 changed files with 58 additions and 5 deletions
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39
drivers/iommu/dmar.c
View File

@ -1421,6 +1421,45 @@ void qi_flush_piotlb(struct intel_iommu *iommu, u16 did, u32 pasid, u64 addr,
qi_submit_sync(&desc, iommu);
}
/* PASID-based device IOTLB Invalidate */
void qi_flush_dev_iotlb_pasid(struct intel_iommu *iommu, u16 sid, u16 pfsid,
u32 pasid, u16 qdep, u64 addr,
unsigned int size_order, u64 granu)
{
unsigned long mask = 1UL << (VTD_PAGE_SHIFT + size_order - 1);
struct qi_desc desc = {.qw1 = 0, .qw2 = 0, .qw3 = 0};
desc.qw0 = QI_DEV_EIOTLB_PASID(pasid) | QI_DEV_EIOTLB_SID(sid) |
QI_DEV_EIOTLB_QDEP(qdep) | QI_DEIOTLB_TYPE |
QI_DEV_IOTLB_PFSID(pfsid);
desc.qw1 = QI_DEV_EIOTLB_GLOB(granu);
/*
* If S bit is 0, we only flush a single page. If S bit is set,
* The least significant zero bit indicates the invalidation address
* range. VT-d spec 6.5.2.6.
* e.g. address bit 12[0] indicates 8KB, 13[0] indicates 16KB.
* size order = 0 is PAGE_SIZE 4KB
* Max Invs Pending (MIP) is set to 0 for now until we have DIT in
* ECAP.
*/
desc.qw1 |= addr & ~mask;
if (size_order)
desc.qw1 |= QI_DEV_EIOTLB_SIZE;
qi_submit_sync(&desc, iommu);
}
void qi_flush_pasid_cache(struct intel_iommu *iommu, u16 did,
u64 granu, int pasid)
{
struct qi_desc desc = {.qw1 = 0, .qw2 = 0, .qw3 = 0};
desc.qw0 = QI_PC_PASID(pasid) | QI_PC_DID(did) |
QI_PC_GRAN(granu) | QI_PC_TYPE;
qi_submit_sync(&desc, iommu);
}
/*
* Disable Queued Invalidation interface.
*/

3
drivers/iommu/intel-pasid.c
View File

@ -375,7 +375,8 @@ pasid_cache_invalidation_with_pasid(struct intel_iommu *iommu,
{
struct qi_desc desc;
desc.qw0 = QI_PC_DID(did) | QI_PC_PASID_SEL | QI_PC_PASID(pasid);
desc.qw0 = QI_PC_DID(did) | QI_PC_GRAN(QI_PC_PASID_SEL) |
QI_PC_PASID(pasid) | QI_PC_TYPE;
desc.qw1 = 0;
desc.qw2 = 0;
desc.qw3 = 0;

21
include/linux/intel-iommu.h
View File

@ -334,7 +334,7 @@ enum {
#define QI_IOTLB_GRAN(gran) (((u64)gran) >> (DMA_TLB_FLUSH_GRANU_OFFSET-4))
#define QI_IOTLB_ADDR(addr) (((u64)addr) & VTD_PAGE_MASK)
#define QI_IOTLB_IH(ih) (((u64)ih) << 6)
#define QI_IOTLB_AM(am) (((u8)am))
#define QI_IOTLB_AM(am) (((u8)am) & 0x3f)
#define QI_CC_FM(fm) (((u64)fm) << 48)
#define QI_CC_SID(sid) (((u64)sid) << 32)
@ -353,16 +353,21 @@ enum {
#define QI_PC_DID(did) (((u64)did) << 16)
#define QI_PC_GRAN(gran) (((u64)gran) << 4)
#define QI_PC_ALL_PASIDS (QI_PC_TYPE | QI_PC_GRAN(0))
#define QI_PC_PASID_SEL (QI_PC_TYPE | QI_PC_GRAN(1))
/* PASID cache invalidation granu */
#define QI_PC_ALL_PASIDS 0
#define QI_PC_PASID_SEL 1
#define QI_EIOTLB_ADDR(addr) ((u64)(addr) & VTD_PAGE_MASK)
#define QI_EIOTLB_IH(ih) (((u64)ih) << 6)
#define QI_EIOTLB_AM(am) (((u64)am))
#define QI_EIOTLB_AM(am) (((u64)am) & 0x3f)
#define QI_EIOTLB_PASID(pasid) (((u64)pasid) << 32)
#define QI_EIOTLB_DID(did) (((u64)did) << 16)
#define QI_EIOTLB_GRAN(gran) (((u64)gran) << 4)
/* QI Dev-IOTLB inv granu */
#define QI_DEV_IOTLB_GRAN_ALL 1
#define QI_DEV_IOTLB_GRAN_PASID_SEL 0
#define QI_DEV_EIOTLB_ADDR(a) ((u64)(a) & VTD_PAGE_MASK)
#define QI_DEV_EIOTLB_SIZE (((u64)1) << 11)
#define QI_DEV_EIOTLB_GLOB(g) ((u64)g)
@ -679,8 +684,16 @@ extern void qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
unsigned int size_order, u64 type);
extern void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 pfsid,
u16 qdep, u64 addr, unsigned mask);
void qi_flush_piotlb(struct intel_iommu *iommu, u16 did, u32 pasid, u64 addr,
unsigned long npages, bool ih);
void qi_flush_dev_iotlb_pasid(struct intel_iommu *iommu, u16 sid, u16 pfsid,
u32 pasid, u16 qdep, u64 addr,
unsigned int size_order, u64 granu);
void qi_flush_pasid_cache(struct intel_iommu *iommu, u16 did, u64 granu,
int pasid);
extern int qi_submit_sync(struct qi_desc *desc, struct intel_iommu *iommu);
extern int dmar_ir_support(void);