Intel E7-8891 v2 CM8063601377422 User Manual

Product codes
CM8063601377422
Page of 504
Integrated I/O (IIO) Configuration Registers
390
Intel
®
 Xeon
® 
Processor E7-2800/4800/8800 v2 Product Family
Datasheet Volume Two: Functional Description, February 2014
14.6.52 IRP_MISC_DFX1
24:24
RW_L
0x1
enable_vtd_reuse:
disregards the reuse hint from vtd. results in a fetch to CBO every time
23:22
RW_L
0x0
aging_timer_rollover:
0: disabled
1: 32us
2: 128us
3: 512us
There is an error of abt + 100%. numbers maybe moved around a little to 
facilitate presilicon validation
21:15
RW_L
0x3
threshold_to_flush_reusable_lines:
The number of free lines left before some of the older vtd reuse lines are 
flushed
14:14
RW_L
0x0
repeat_dumped_pf:
This is a performance optimization to quickly reissue a prefetch when 
ownership is lost due to a tickle. Specifically, if ownership is lost due to a 
tickle, it is reissued independent of the switch coming back without a fetch 
from switch.
Note:
This bit should never be set.
13:9
RW_L
0x9
min_free_cq_entries:
The number of free conflictq entries at which the non-isoc transactions are 
throttled. There are a total of 32 entries to begin with. Valid programming 
values are 0x0 to 0x1E.
0x1F is an invalid programming value and should not be used.
8:8
RW_L
0x1
check_iocfg_format:
does some format checking address alignment for io and cfg transactions.
7:7
RW_L
0x1
check_ltrd_format:
does some format checking for lt transactions.
6:6
RW_L
0x1
use_isoc_ovf_q:
use a different queue between switch and IRP for isoc transaction.
5:5
RW_L
0x1
enable_spl_isoc_vt_reqs:
issue an isoc Intel VT transaction irrespective of whether another trans to 
the same address is pending or not.
4:1
RW_L
0x4
min_free_isoc_hq_entry:
0:0
RV
0x0
Reserved:
Type:
CFG
PortID:
N/A
Bus:
0
Device:
5Function:0
Offset:
0x800
Bit
Attr
Default
Description
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