[coreboot-gerrit] Change in coreboot[master]: mb/ocp/deltalake: enable VT-d

[Jonathan Zhang (Code Review)]

Jonathan Zhang has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/44281 )

Change subject: mb/ocp/deltalake: enable VT-d
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mb/ocp/deltalake: enable VT-d

Update devicetree.cb to configure VT-d to be enabled.

TESTED=booted on DeltaLake config A server, and verify DMAR table.

Signed-off-by: Jonathan Zhang 
Change-Id: I7d76cd9d50d3e69a4919de281f11d30851bffa3f
---
M src/mainboard/ocp/deltalake/devicetree.cb
1 file changed, 3 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/81/44281/1

diff --git a/src/mainboard/ocp/deltalake/devicetree.cb b/src/mainboard/ocp/deltalake/devicetree.cb
index f77a214..1773f9f 100644
--- a/src/mainboard/ocp/deltalake/devicetree.cb
+++ b/src/mainboard/ocp/deltalake/devicetree.cb
@@ -33,8 +33,9 @@
    # configure PSTATE_REQ_RATIO for MSR_IA32_PERF_CTRL
    register "pstate_req_ratio" = "0xa"

-	register "coherency_support" = "0"
-	register "ats_support" = "0"
+	# configure VT-d
+	register "vtd_support" = "1"
+	register "x2apic" = "1"

register "gen1_dec" = "0x00fc0601" # BIC in-band update support
    register "gen2_dec" = "0x000c0ca1" # IPMI KCS