motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-04 16:23:55 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

intel-iommu: add context-cache to cache context-entry

Browse source 
Add context-cache to cache context-entry encountered on a page-walk. Each
VTDAddressSpace has a member of VTDContextCacheEntry which represents an entry
in the context-cache. Since devices with different bus_num and devfn have their
respective VTDAddressSpace, this will be a good way to reference the cached
entries.
Each VTDContextCacheEntry will have a context_cache_gen and the cached entry
is valid only when context_cache_gen equals IntelIOMMUState.context_cache_gen.

Signed-off-by: Le Tan <tamlokveer@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Le Tan 2014-08-16 13:55:43 +08:00 • committed by Michael S. Tsirkin
parent ed7b8fbcfb
commit d92fa2dc6e
4 changed files with 200 additions and 36 deletions
Download patch file Download diff file Expand all files Collapse all files

23
hw/i386/intel_iommu_internal.h
View file

@ -154,6 +154,9 @@
#define VTD_CCMD_DOMAIN_INVL_A (2ULL << 59)
#define VTD_CCMD_DEVICE_INVL_A (3ULL << 59)
#define VTD_CCMD_CAIG_MASK (3ULL << 59)
#define VTD_CCMD_DID(val) ((val) & VTD_DOMAIN_ID_MASK)
#define VTD_CCMD_SID(val) (((val) >> 16) & 0xffffULL)
#define VTD_CCMD_FM(val) (((val) >> 32) & 3ULL)
/* RTADDR_REG */
#define VTD_RTADDR_RTT (1ULL << 11)
@ -169,6 +172,7 @@
#define VTD_CAP_FRO (DMAR_FRCD_REG_OFFSET << 20)
#define VTD_CAP_NFR ((DMAR_FRCD_REG_NR - 1) << 40)
#define VTD_DOMAIN_ID_SHIFT 16 /* 16-bit domain id for 64K domains */
#define VTD_DOMAIN_ID_MASK ((1UL << VTD_DOMAIN_ID_SHIFT) - 1)
#define VTD_CAP_ND (((VTD_DOMAIN_ID_SHIFT - 4) / 2) & 7ULL)
#define VTD_MGAW 39 /* Maximum Guest Address Width */
#define VTD_CAP_MGAW (((VTD_MGAW - 1) & 0x3fULL) << 16)
@ -255,6 +259,8 @@ typedef enum VTDFaultReason {
VTD_FR_MAX, /* Guard */
} VTDFaultReason;
#define VTD_CONTEXT_CACHE_GEN_MAX 0xffffffffUL
/* Queued Invalidation Descriptor */
struct VTDInvDesc {
uint64_t lo;
@ -277,6 +283,16 @@ typedef struct VTDInvDesc VTDInvDesc;
#define VTD_INV_DESC_WAIT_RSVD_LO 0Xffffff80ULL
#define VTD_INV_DESC_WAIT_RSVD_HI 3ULL
/* Masks for Context-cache Invalidation Descriptor */
#define VTD_INV_DESC_CC_G (3ULL << 4)
#define VTD_INV_DESC_CC_GLOBAL (1ULL << 4)
#define VTD_INV_DESC_CC_DOMAIN (2ULL << 4)
#define VTD_INV_DESC_CC_DEVICE (3ULL << 4)
#define VTD_INV_DESC_CC_DID(val) (((val) >> 16) & VTD_DOMAIN_ID_MASK)
#define VTD_INV_DESC_CC_SID(val) (((val) >> 32) & 0xffffUL)
#define VTD_INV_DESC_CC_FM(val) (((val) >> 48) & 3UL)
#define VTD_INV_DESC_CC_RSVD 0xfffc00000000ffc0ULL
/* Pagesize of VTD paging structures, including root and context tables */
#define VTD_PAGE_SHIFT 12
#define VTD_PAGE_SIZE (1ULL << VTD_PAGE_SHIFT)
@ -301,13 +317,6 @@ typedef struct VTDRootEntry VTDRootEntry;
#define VTD_ROOT_ENTRY_NR (VTD_PAGE_SIZE / sizeof(VTDRootEntry))
#define VTD_ROOT_ENTRY_RSVD (0xffeULL | ~VTD_HAW_MASK)
/* Context-Entry */
struct VTDContextEntry {
uint64_t lo;
uint64_t hi;
};
typedef struct VTDContextEntry VTDContextEntry;
/* Masks for struct VTDContextEntry */
/* lo */
#define VTD_CONTEXT_ENTRY_P (1ULL << 0)