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authorJonathan Zhang <jonzhang@fb.com>2020-10-01 14:54:09 -0700
committerAngel Pons <th3fanbus@gmail.com>2020-10-08 12:05:02 +0000
commit431741bf008f46326a3685f9395127586481d304 (patch)
tree8bce03b7dbbed1a151107c3069462e9a20b07e57 /src/vendorcode
parent407d552e0c642da601a88283676ee885402e81c4 (diff)
soc/intel/xeon_sp/cpx: correct GSI bases for IO APICs
With CPX-SP FSP, PCH IOAPIC handles the first 120(0x78) GSIs. Correct the coreboot assignment of GSIs for IO APICs. Without this patch, there are following target OS boot messages: [    1.098771] IOAPIC[0]: apic_id 8, version 32, address 0xfec00000, GSI 0-119 [    1.099159] GSI range [24-31] for new IOAPIC conflicts with GSI[0-119] After this patch, the boot messages are: [ 0.399498] IOAPIC[0]: apic_id 8, version 32, address 0xfec00000, GSI 0-119 [ 0.399848] IOAPIC[1]: apic_id 9, version 32, address 0xfec01000, GSI 120-127 Also without this patch, there is boot stability issue. About one in 20 reboots, the target OS fails to boot with following failure: [ 4.325795] mce: [Hardware Error]: Machine check events logged [ 4.326597] mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 9: ee2000000003110a [ 4.327594] mce: [Hardware Error]: TSC 0 ADDR fe9e0000 MISC 228aa040101086 [ 4.328596] mce: [Hardware Error]: PROCESSOR 0:5065b TIME 1601443875 SOCKET 0 APIC 0 microcode 700001d The MCE error happens in bank 9. The Model specific error code shows it is about SAD_ERR_WB_TO_MMIO error (doc 604926), which means something goes wrong when cache write back to mmio. It is a generic transaction type error in level 2. Signed-off-by: Jonathan Zhang <jonzhang@fb.com> Change-Id: I45e941591300dad6d583a6dcb41f45e984753c07 Reviewed-on: https://review.coreboot.org/c/coreboot/+/45941 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Christian Walter <christian.walter@9elements.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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