From 6e2d0c1b90251b4b61af582d2598cdbd38591db7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ky=C3=B6sti=20M=C3=A4lkki?= Date: Fri, 28 Jun 2019 10:08:51 +0300 Subject: arch/x86: Adjust size of postcar stack MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit With VBOOT=y && VBOOT_MEASURED_BOOT=y message digest will be allocated from the stack and 1 KiB reserve used with the recent platforms was no longer sufficient. The comment of LZMA scratchpad consuming stack was obsolete for postcar, so these can be reduced to same 4 KiB. Change-Id: Iba1fb5bfad6946f316feac2d8c998a782142a56a Signed-off-by: Mario Scheithauer Signed-off-by: Kyösti Mälkki Reviewed-on: https://review.coreboot.org/c/coreboot/+/33775 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin Reviewed-by: Werner Zeh --- src/arch/x86/include/arch/cpu.h | 5 +++-- src/arch/x86/postcar_loader.c | 9 +++++++++ 2 files changed, 12 insertions(+), 2 deletions(-) (limited to 'src/arch') diff --git a/src/arch/x86/include/arch/cpu.h b/src/arch/x86/include/arch/cpu.h index 75f1f439b8..38066c15a2 100644 --- a/src/arch/x86/include/arch/cpu.h +++ b/src/arch/x86/include/arch/cpu.h @@ -309,8 +309,9 @@ struct postcar_frame { }; /* - * Initialize postcar_frame object allocating stack size in cbmem - * with the provided size. Returns 0 on success, < 0 on error. + * Initialize postcar_frame object allocating stack from cbmem, + * with stack_size == 0, default 4 KiB is allocated. + * Returns 0 on success, < 0 on error. */ int postcar_frame_init(struct postcar_frame *pcf, size_t stack_size); diff --git a/src/arch/x86/postcar_loader.c b/src/arch/x86/postcar_loader.c index 732b767bf6..35e139fe1c 100644 --- a/src/arch/x86/postcar_loader.c +++ b/src/arch/x86/postcar_loader.c @@ -48,6 +48,15 @@ int postcar_frame_init(struct postcar_frame *pcf, size_t stack_size) { void *stack; + /* + * Use default postcar stack size of 4 KiB. This value should + * not be decreased, because if mainboards use vboot, 1 KiB will + * not be enough anymore. + */ + + if (stack_size == 0) + stack_size = 4 * KiB; + stack = cbmem_add(CBMEM_ID_ROMSTAGE_RAM_STACK, stack_size); if (stack == NULL) { printk(BIOS_ERR, "Couldn't add %zd byte stack in cbmem.\n", -- cgit v1.2.3