[coreboot-gerrit] Change in coreboot[master]: soc/intel/xeon_sp/cpx: Implement hide/unhide P2SB traditional dance

[Andrey Petrov (Code Review)]

Andrey Petrov has submitted this change. ( https://review.coreboot.org/c/coreboot/+/40921 )

Change subject: soc/intel/xeon_sp/cpx: Implement hide/unhide P2SB traditional dance
......................................................................

soc/intel/xeon_sp/cpx: Implement hide/unhide P2SB traditional dance

Perform the P2SB hide/unhide trick. This is needed so that BAR0
(0xfd000000) is not reclaimed by resource allocator, since it can
not deal with a device that does not exist (hidden).

Signed-off-by: Andrey Petrov 
Change-Id: I5db0ae4e31d72ba86efba5728b2afc68d3180d5d
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40921
Tested-by: build bot (Jenkins) 
Reviewed-by: Angel Pons 
Reviewed-by: Maxim Polyakov 
---
M src/soc/intel/xeon_sp/cpx/chip.c
1 file changed, 3 insertions(+), 1 deletion(-)

Approvals:
  build bot (Jenkins): Verified
  Angel Pons: Looks good to me, approved
  Maxim Polyakov: Looks good to me, approved

diff --git a/src/soc/intel/xeon_sp/cpx/chip.c b/src/soc/intel/xeon_sp/cpx/chip.c
index 196f3df..0a4cea6 100644
--- a/src/soc/intel/xeon_sp/cpx/chip.c
+++ b/src/soc/intel/xeon_sp/cpx/chip.c
@@ -7,6 +7,7 @@
 #include <cpu/x86/lapic.h>
 #include <device/pci.h>
 #include <fsp/api.h>
+#include <intelblocks/p2sb.h>
 #include <soc/cpu.h>
 #include <soc/ramstage.h>
 #include <soc/pm.h>
@@ -73,7 +74,7 @@

static void chip_final(void *data)
 {
-	/* nothing implemented yet */
+	p2sb_hide();
 }

static void chip_init(void *data)
@@ -82,6 +83,7 @@
    fsp_silicon_init(false);
    pch_enable_ioapic(NULL);
    setup_lapic();
+	p2sb_unhide();
 }

struct chip_operations soc_intel_xeon_sp_cpx_ops = {