x86: Use microcode update from device tree for all processors
Built without a ROM image with FSP (u-boot.rom), the U-Boot loader applies
the microcode update data block encoded in Device Tree to the bootstrap
processor but not passed to the other CPUs when multiprocessing is enabled.
If the bootstrap processor successfully performs a microcode update
from Device Tree, use the same data block for the other processors.
Signed-off-by: Ivan Gorinov <ivan.gorinov@intel.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
[bmeng: fixed build errors on edison and qemu-x86]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/cpu/intel_common/car.S b/arch/x86/cpu/intel_common/car.S
index fe8dfbc..52a77bb 100644
--- a/arch/x86/cpu/intel_common/car.S
+++ b/arch/x86/cpu/intel_common/car.S
@@ -239,4 +239,6 @@
.globl ucode_base
ucode_base: /* Declared in microcode.h */
.long 0 /* microcode base */
+.globl ucode_size
+ucode_size: /* Declared in microcode.h */
.long 0 /* microcode size */
diff --git a/arch/x86/cpu/intel_common/microcode.c b/arch/x86/cpu/intel_common/microcode.c
index 11b1ec8..c7a539d 100644
--- a/arch/x86/cpu/intel_common/microcode.c
+++ b/arch/x86/cpu/intel_common/microcode.c
@@ -43,8 +43,6 @@
update->data = fdt_getprop(blob, node, "data", &update->size);
if (!update->data)
return -ENOENT;
- update->data += UCODE_HEADER_LEN;
- update->size -= UCODE_HEADER_LEN;
update->header_version = fdtdec_get_int(blob, node,
"intel,header-version", 0);
@@ -124,6 +122,7 @@
int microcode_update_intel(void)
{
struct microcode_update cpu, update;
+ ulong address;
const void *blob = gd->fdt_blob;
int skipped;
int count;
@@ -167,7 +166,8 @@
skipped++;
continue;
}
- wrmsr(MSR_IA32_UCODE_WRITE, (ulong)update.data, 0);
+ address = (ulong)update.data + UCODE_HEADER_LEN;
+ wrmsr(MSR_IA32_UCODE_WRITE, address, 0);
rev = microcode_read_rev();
debug("microcode: updated to revision 0x%x date=%04x-%02x-%02x\n",
rev, update.date_code & 0xffff,
@@ -178,5 +178,9 @@
return -EFAULT;
}
count++;
+ if (!ucode_base) {
+ ucode_base = (ulong)update.data;
+ ucode_size = update.size;
+ }
} while (1);
}
diff --git a/arch/x86/include/asm/microcode.h b/arch/x86/include/asm/microcode.h
index f7b32a5..4ab7504 100644
--- a/arch/x86/include/asm/microcode.h
+++ b/arch/x86/include/asm/microcode.h
@@ -10,6 +10,7 @@
/* This is a declaration for ucode_base in start.S */
extern u32 ucode_base;
+extern u32 ucode_size;
/**
* microcode_update_intel() - Apply microcode updates
diff --git a/arch/x86/lib/fsp/fsp_car.S b/arch/x86/lib/fsp/fsp_car.S
index 549d863..48edc83 100644
--- a/arch/x86/lib/fsp/fsp_car.S
+++ b/arch/x86/lib/fsp/fsp_car.S
@@ -102,8 +102,10 @@
_dt_ucode_base_size:
/* These next two fields are filled in by ifdtool */
.globl ucode_base
-ucode_base: /* Declared in micrcode.h */
+ucode_base: /* Declared in microcode.h */
.long 0 /* microcode base */
+.globl ucode_size
+ucode_size: /* Declared in microcode.h */
.long 0 /* microcode size */
.long CONFIG_SYS_MONITOR_BASE /* code region base */
.long CONFIG_SYS_MONITOR_LEN /* code region size */