arch/x86: Adjust size of postcar stack

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 <mario.scheithauer@siemens.com>
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33775
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>

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);
 

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",

src/cpu/intel/haswell/romstage.c

@@ -38,8 +38,6 @@
 #include <cpu/intel/romstage.h>
 #include "haswell.h"
 
-#define ROMSTAGE_RAM_STACK_SIZE 0x5000
-
 /* platform_enter_postcar() determines the stack to use after
  * cache-as-ram is torn down as well as the MTRR settings to use,
  * and continues execution in postcar stage. */
@@ -48,7 +46,7 @@ void platform_enter_postcar(void)
 	struct postcar_frame pcf;
 	uintptr_t top_of_ram;
 
-	if (postcar_frame_init(&pcf, ROMSTAGE_RAM_STACK_SIZE))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 	/* Cache the ROM as WP just below 4GiB. */
 	postcar_frame_add_romcache(&pcf, MTRR_TYPE_WRPROT);

src/drivers/intel/fsp1_1/car.c

@@ -25,8 +25,6 @@
 #include <program_loading.h>
 #include <timestamp.h>
 
-#define ROMSTAGE_RAM_STACK_SIZE 0x5000
-
 /* platform_enter_postcar() determines the stack to use after
  * cache-as-ram is torn down as well as the MTRR settings to use,
  * and continues execution in postcar stage. */
@@ -35,7 +33,7 @@ void platform_enter_postcar(void)
 	struct postcar_frame pcf;
 	uintptr_t top_of_ram;
 
-	if (postcar_frame_init(&pcf, ROMSTAGE_RAM_STACK_SIZE))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 	/* Cache the ROM as WP just below 4GiB. */
 	postcar_frame_add_mtrr(&pcf, CACHE_ROM_BASE, CACHE_ROM_SIZE,

src/mainboard/emulation/qemu-i440fx/romstage.c

@@ -14,6 +14,7 @@
  * GNU General Public License for more details.
  */
 
+#include <arch/cpu.h>
 #include <stdint.h>
 #include <cbmem.h>
 #include <console/console.h>
@@ -31,11 +32,7 @@ asmlinkage void car_stage_entry(void)
 
 	timestamp_add_now(TS_START_ROMSTAGE);
 
-	/**
-	 * The LZMA decoder needs about 4 KiB stack.
-	 * Leave 1 KiB stack for general postcar code.
-	 */
-	if (postcar_frame_init(&pcf, 5 * KiB))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 
 	/**

src/mainboard/emulation/qemu-q35/romstage.c

@@ -14,6 +14,7 @@
  * GNU General Public License for more details.
  */
 
+#include <arch/cpu.h>
 #include <stdint.h>
 #include <cbmem.h>
 #include <console/console.h>
@@ -32,11 +33,7 @@ asmlinkage void car_stage_entry(void)
 
 	timestamp_add_now(TS_START_ROMSTAGE);
 
-	/**
-	 * The LZMA decoder needs about 4 KiB stack.
-	 * Leave 1 KiB stack for general postcar code.
-	 */
-	if (postcar_frame_init(&pcf, 5 * KiB))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 
 	/**

src/northbridge/intel/e7505/memmap.c

@@ -35,8 +35,6 @@ void *cbmem_top(void)
 	return (void *)tolm;
 }
 
-#define ROMSTAGE_RAM_STACK_SIZE 0x5000
-
 /* platform_enter_postcar() determines the stack to use after
  * cache-as-ram is torn down as well as the MTRR settings to use,
  * and continues execution in postcar stage. */
@@ -45,7 +43,7 @@ void platform_enter_postcar(void)
 	struct postcar_frame pcf;
 	uintptr_t top_of_ram;
 
-	if (postcar_frame_init(&pcf, ROMSTAGE_RAM_STACK_SIZE))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 
 	/*

src/northbridge/intel/gm45/ram_calc.c

@@ -123,8 +123,6 @@ void *cbmem_top(void)
 	return (void *) top_of_ram;
 }
 
-#define ROMSTAGE_RAM_STACK_SIZE 0x5000
-
 /* platform_enter_postcar() determines the stack to use after
  * cache-as-ram is torn down as well as the MTRR settings to use,
  * and continues execution in postcar stage. */
@@ -133,7 +131,7 @@ void platform_enter_postcar(void)
 	struct postcar_frame pcf;
 	uintptr_t top_of_ram;
 
-	if (postcar_frame_init(&pcf, ROMSTAGE_RAM_STACK_SIZE))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 
 	/* Cache the ROM as WP just below 4GiB. */

src/northbridge/intel/i440bx/ram_calc.c

@@ -15,6 +15,7 @@
 
 #define __SIMPLE_DEVICE__
 
+#include <arch/cpu.h>
 #include <device/pci_ops.h>
 #include <cbmem.h>
 #include <console/console.h>
@@ -67,8 +68,6 @@ void *cbmem_top(void)
 	return (void *)tom;
 }
 
-#define ROMSTAGE_RAM_STACK_SIZE 0x5000
-
 /* platform_enter_postcar() determines the stack to use after
  * cache-as-ram is torn down as well as the MTRR settings to use,
  * and continues execution in postcar stage. */
@@ -77,7 +76,7 @@ void platform_enter_postcar(void)
 	struct postcar_frame pcf;
 	uintptr_t top_of_ram;
 
-	if (postcar_frame_init(&pcf, ROMSTAGE_RAM_STACK_SIZE))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 
 	/* Cache the ROM as WP just below 4GiB. */

src/northbridge/intel/i945/ram_calc.c

@@ -88,8 +88,6 @@ u32 decode_igd_memory_size(const u32 gms)
 	return ggc2uma[gms] << 10;
 }
 
-#define ROMSTAGE_RAM_STACK_SIZE 0x5000
-
 /* platform_enter_postcar() determines the stack to use after
  * cache-as-ram is torn down as well as the MTRR settings to use,
  * and continues execution in postcar stage. */
@@ -98,7 +96,7 @@ void platform_enter_postcar(void)
 	struct postcar_frame pcf;
 	uintptr_t top_of_ram;
 
-	if (postcar_frame_init(&pcf, ROMSTAGE_RAM_STACK_SIZE))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 
 	/* Cache the ROM as WP just below 4GiB. */

src/northbridge/intel/nehalem/ram_calc.c

@@ -43,8 +43,6 @@ void *cbmem_top(void)
 	return (void *) smm_region_start();
 }
 
-#define ROMSTAGE_RAM_STACK_SIZE 0x5000
-
 /* platform_enter_postcar() determines the stack to use after
  * cache-as-ram is torn down as well as the MTRR settings to use,
  * and continues execution in postcar stage. */
@@ -53,7 +51,7 @@ void platform_enter_postcar(void)
 	struct postcar_frame pcf;
 	uintptr_t top_of_ram;
 
-	if (postcar_frame_init(&pcf, ROMSTAGE_RAM_STACK_SIZE))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 
 	/* Cache the ROM as WP just below 4GiB. */

src/northbridge/intel/pineview/ram_calc.c

@@ -16,6 +16,7 @@
 
 #define __SIMPLE_DEVICE__
 
+#include <arch/cpu.h>
 #include <device/pci_ops.h>
 #include <device/device.h>
 #include <device/pci_def.h>
@@ -137,8 +138,6 @@ void *cbmem_top(void)
 
 }
 
-#define ROMSTAGE_RAM_STACK_SIZE 0x5000
-
 /* platform_enter_postcar() determines the stack to use after
  * cache-as-ram is torn down as well as the MTRR settings to use,
  * and continues execution in postcar stage. */
@@ -147,7 +146,7 @@ void platform_enter_postcar(void)
 	struct postcar_frame pcf;
 	uintptr_t top_of_ram;
 
-	if (postcar_frame_init(&pcf, ROMSTAGE_RAM_STACK_SIZE))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 
 	/* Cache the ROM as WP just below 4GiB. */

src/northbridge/intel/sandybridge/ram_calc.c

@@ -43,8 +43,6 @@ void *cbmem_top(void)
 	return (void *) smm_region_start();
 }
 
-#define ROMSTAGE_RAM_STACK_SIZE 0x5000
-
 /* platform_enter_postcar() determines the stack to use after
  * cache-as-ram is torn down as well as the MTRR settings to use,
  * and continues execution in postcar stage. */
@@ -53,7 +51,7 @@ void platform_enter_postcar(void)
 	struct postcar_frame pcf;
 	uintptr_t top_of_ram;
 
-	if (postcar_frame_init(&pcf, ROMSTAGE_RAM_STACK_SIZE))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 
 	/* Cache the ROM as WP just below 4GiB. */

src/northbridge/intel/x4x/ram_calc.c

@@ -134,8 +134,6 @@ void *cbmem_top(void)
 	return (void *) top_of_ram;
 }
 
-#define ROMSTAGE_RAM_STACK_SIZE 0x5000
-
 /* platform_enter_postcar() determines the stack to use after
  * cache-as-ram is torn down as well as the MTRR settings to use,
  * and continues execution in postcar stage. */
@@ -144,7 +142,7 @@ void platform_enter_postcar(void)
 	struct postcar_frame pcf;
 	uintptr_t top_of_ram;
 
-	if (postcar_frame_init(&pcf, ROMSTAGE_RAM_STACK_SIZE))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 
 	/* Cache the ROM as WP just below 4GiB. */

src/soc/amd/stoneyridge/romstage.c

@@ -153,7 +153,7 @@ asmlinkage void car_stage_entry(void)
 		printk(BIOS_ERR, "Failed to set romstage handoff data\n");
 
 	post_code(0x44);
-	if (postcar_frame_init(&pcf, 1 * KiB))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 
 	/*

src/soc/intel/apollolake/romstage.c

@@ -240,7 +240,7 @@ asmlinkage void car_stage_entry(void)
 	else
 		printk(BIOS_ERR, "Failed to determine variable data\n");
 
-	if (postcar_frame_init(&pcf, 1*KiB))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 
 	mainboard_save_dimm_info();

src/soc/intel/baytrail/romstage/romstage.c

@@ -238,8 +238,6 @@ void romstage_common(struct romstage_params *params)
 	romstage_handoff_init(prev_sleep_state == ACPI_S3);
 }
 
-#define ROMSTAGE_RAM_STACK_SIZE 0x5000
-
 /* setup_stack_and_mtrrs() determines the stack to use after
  * cache-as-ram is torn down as well as the MTRR settings to use. */
 static void platform_enter_postcar(void)
@@ -247,7 +245,7 @@ static void platform_enter_postcar(void)
 	struct postcar_frame pcf;
 	uintptr_t top_of_ram;
 
-	if (postcar_frame_init(&pcf, ROMSTAGE_RAM_STACK_SIZE))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 	/* Cache the ROM as WP just below 4GiB. */
 	postcar_frame_add_romcache(&pcf, MTRR_TYPE_WRPROT);

src/soc/intel/broadwell/romstage/romstage.c

@@ -16,6 +16,7 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <arch/cbfs.h>
+#include <arch/cpu.h>
 #include <bootblock_common.h>
 #include <bootmode.h>
 #include <cbmem.h>
@@ -34,8 +35,6 @@
 #include <soc/romstage.h>
 #include <soc/spi.h>
 
-#define ROMSTAGE_RAM_STACK_SIZE 0x5000
-
 /* platform_enter_postcar() determines the stack to use after
  * cache-as-ram is torn down as well as the MTRR settings to use,
  * and continues execution in postcar stage. */
@@ -44,7 +43,7 @@ void platform_enter_postcar(void)
 	struct postcar_frame pcf;
 	uintptr_t top_of_ram;
 
-	if (postcar_frame_init(&pcf, ROMSTAGE_RAM_STACK_SIZE))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 	/* Cache the ROM as WP just below 4GiB. */
 	postcar_frame_add_romcache(&pcf, MTRR_TYPE_WRPROT);

src/soc/intel/cannonlake/romstage/romstage.c

@@ -13,6 +13,7 @@
  * GNU General Public License for more details.
  */
 
+#include <arch/cpu.h>
 #include <cpu/x86/mtrr.h>
 #include <cbmem.h>
 #include <console/console.h>
@@ -146,7 +147,7 @@ asmlinkage void car_stage_entry(void)
 	pmc_set_disb();
 	if (!s3wake)
 		save_dimm_info();
-	if (postcar_frame_init(&pcf, 1 * KiB))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 
 	/*

src/soc/intel/denverton_ns/romstage.c

@@ -14,6 +14,7 @@
  * GNU General Public License for more details.
  */
 
+#include <arch/cpu.h>
 #include <arch/io.h>
 #include <cbmem.h>
 #include <cf9_reset.h>
@@ -161,7 +162,7 @@ asmlinkage void car_stage_entry(void)
 	display_fsp_smbios_memory_info_hob();
 #endif
 
-	if (postcar_frame_init(&pcf, 1 * KiB))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 
 	/*

src/soc/intel/icelake/romstage/romstage.c

@@ -13,6 +13,7 @@
  * GNU General Public License for more details.
  */
 
+#include <arch/cpu.h>
 #include <cpu/x86/mtrr.h>
 #include <cbmem.h>
 #include <console/console.h>
@@ -131,7 +132,7 @@ asmlinkage void car_stage_entry(void)
 	pmc_set_disb();
 	if (!s3wake)
 		save_dimm_info();
-	if (postcar_frame_init(&pcf, 1 * KiB))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 
 	/*

src/soc/intel/quark/romstage/fsp2_0.c

@@ -13,6 +13,7 @@
  * GNU General Public License for more details.
  */
 
+#include <arch/cpu.h>
 #include <arch/symbols.h>
 #include <console/console.h>
 #include <cbmem.h>
@@ -61,7 +62,7 @@ asmlinkage void car_stage_c_entry(void)
 	/* Initialize the PCIe bridges */
 	pcie_init();
 
-	if (postcar_frame_init(&pcf, 1*KiB))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 
 	/* Locate the top of RAM */

src/soc/intel/skylake/romstage/romstage_fsp20.c

@@ -158,7 +158,7 @@ asmlinkage void car_stage_entry(void)
 	pmc_set_disb();
 	if (!s3wake)
 		save_dimm_info();
-	if (postcar_frame_init(&pcf, 1*KiB))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 
 	/*