Change in coreboot[master]: soc/amd/common/psp_verstage: Save transfer buffer during S0i3 resume

[Felix Held (Code Review)]

Felix Held has submitted this change. ( https://review.coreboot.org/c/coreboot/+/62347 )

Change subject: soc/amd/common/psp_verstage: Save transfer buffer during S0i3 resume
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soc/amd/common/psp_verstage: Save transfer buffer during S0i3 resume

We need to save the transfer buffer so we can transfer the cbmem
console and timestamps into x86 DRAM.

BUG=b:221231786
TEST=Boot guybrush and verify S0i3 resume works. Also dumped the
transfer buffer from the OS and verified the console contents got
transferred.

Signed-off-by: Raul E Rangel 
Change-Id: I1d3b34c90e0e18609b0c6a0cdedab35aeefbd84b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62347
Tested-by: build bot (Jenkins) 
Reviewed-by: Karthik Ramasubramanian 
---
M src/soc/amd/common/psp_verstage/psp_verstage.c
1 file changed, 5 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Karthik Ramasubramanian: Looks good to me, approved

diff --git a/src/soc/amd/common/psp_verstage/psp_verstage.c b/src/soc/amd/common/psp_verstage/psp_verstage.c
index 05f0cda..9d0fb22 100644
--- a/src/soc/amd/common/psp_verstage/psp_verstage.c
+++ b/src/soc/amd/common/psp_verstage/psp_verstage.c
@@ -252,6 +252,11 @@
    if (bootmode == PSP_BOOT_MODE_S0i3_RESUME) {
    	psp_verstage_s0i3_resume();

+		post_code(POSTCODE_SAVE_BUFFERS);
+		retval = save_buffers();
+		if (retval)
+			post_code(retval);
+
    	post_code(POSTCODE_UNMAP_FCH_DEVICES);
    	unmap_fch_devices();