Intel E7-8891 v2 CM8063601377422 User Manual
Product codes
CM8063601377422
Intel
®
Xeon
®
Processor E7-2800/4800/8800 v2 Product Family
183
Datasheet Volume Two: Functional Description, February 2014
Processor Uncore Configuration Registers
13.7.4.4
CAPID2
This register is a Capability Register used to expose enable/disable for BIOS use.
7:7
RO_FW
0x0
X2APIC_EN:
Enable Extended APIC support.
When set the enables the support of x2APIC (Extended APIC) in the core and
When set the enables the support of x2APIC (Extended APIC) in the core and
uncore. The being set will impact:
a. CPUID indication x2APIC support
b. CPU ability to enable x2APIC support
c. Uncore ability to generate and send x2APIC messages.
a. CPUID indication x2APIC support
b. CPU ability to enable x2APIC support
c. Uncore ability to generate and send x2APIC messages.
6:6
RO_FW
0x0
CPU_HOT_ADD_EN:
Intel
®
TXT - ENABLE CPU HOT ADD
5:5
RO_FW
0x0
PWRBITS_DIS:
0b Power features activated during reset
1b Power features (especially clock gating) are not activated
1b Power features (especially clock gating) are not activated
4:4
RO_FW
0x0
GV3_DIS:
Disable GV3. Does not allow for the writing of the IA32_PERF_CONTROL
register in order to change ratios
3:2
RO_FW
0x0
PPPE:
PPPE_ENABLE
1:1
RO_FW
0x0
CORE_RAS_EN:
Enable Data Poisoning, MCA recovery
0:0
RO_FW
0x0
DCA_EN:
DCA Enable
Type:
CFG
PortID: N/A
Bus:
1
Device: 10
Function:
3
Offset:
0x88
Bit
Attr
Default
Description
Type:
CFG
PortID: N/A
Bus:
1
Device: 10
Function:
3
Offset:
0x8c
Bit
Attr
Default
Description
31:31
RO_FW
0x0
QPI_SPARE:
30:30
RO_FW
0x0
QPI_LINK2_DIS:
When set Intel
®
QPI link 2 will be disabled.
29:25
RO_FW
0x0
QPI_ALLOWED_CFCLK_RATIO_DIS:
Allowed CFCLK ratio is 12,11,10,9, 8 (default),7; One bit is allocated for each
supported ratio except 8, the default ratio. Intel
®
QPI transfer rate = 8 *
CFCLK. Bits are organized as r12_r11_r10_r9_r7 format. 0/1 --> ratio
supported/not supported. Default ratio of 8 is always supported, hence can not
be disabled. Ex: 00000 ==> Supported ratio: 12,11,10,9,8 (default),7; ratio
not supported:
none 00001 ==> Supported ratio: 12,11,10,9,8 (default); ratio not supported:
none 00001 ==> Supported ratio: 12,11,10,9,8 (default); ratio not supported:
7
........ 11111 ==> Supported ratio: 8 (default); ratio not supported:
........ 11111 ==> Supported ratio: 8 (default); ratio not supported:
12,11,10,9,7