[coreboot-gerrit] Change in coreboot[master]: x86/lapic: Set EXTINT on BSP only

[Felix Held (Code Review)]

Felix Held has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/42434 )

Change subject: x86/lapic: Set EXTINT on BSP only
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x86/lapic: Set EXTINT on BSP only

aac79e0b8f4777f8a912ccdfc483755b7a4da52c changed the LAPIC delivery mode
for both the BSP and the APs. The change on the APs caused a regression
that massively slows down the boot process. Configuring the AP's LAPIC
delivery mode to fixed mode fixes this regression.

Change-Id: I78490d2cbe3d9f52e10ef2471508263fd6c146ba
Signed-off-by: Felix Held 
---
M src/cpu/x86/lapic/lapic.c
1 file changed, 2 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/34/42434/1

diff --git a/src/cpu/x86/lapic/lapic.c b/src/cpu/x86/lapic/lapic.c
index 653c3b2..2e04464 100644
--- a/src/cpu/x86/lapic/lapic.c
+++ b/src/cpu/x86/lapic/lapic.c
@@ -31,6 +31,8 @@
    			(LAPIC_LVT_REMOTE_IRR | LAPIC_SEND_PENDING);
    if (boot_cpu())
    	lvt0_val = SET_LAPIC_DELIVERY_MODE(lvt0_val, LAPIC_MODE_EXINT);
+	else
+		lvt0_val = SET_LAPIC_DELIVERY_MODE(lvt0_val, LAPIC_MODE_FIXED);
    lapic_write_around(LAPIC_LVT0, lvt0_val);

lapic_write_around(LAPIC_LVT1,