@@ -854,6 +854,22 @@ static int __init early_microcode_update_cpu(void)
return microcode_update_cpu(patch, 0);
}
+/*
+ * There are several tasks:
+ * - Locate the ucode blob in the boot modules.
+ * - Parse and attempt in-place load.
+ * - Inform microcode_init_cache() of how to find the blob again.
+ */
+static int __init early_microcode_load(struct boot_info *bi)
+{
+ microcode_grab_module(bi);
+
+ if ( !ucode_mod.mod_end && !ucode_blob.size )
+ return 0;
+
+ return early_microcode_update_cpu();
+}
+
int __init early_microcode_init(struct boot_info *bi)
{
const struct cpuinfo_x86 *c = &boot_cpu_data;
@@ -897,10 +913,7 @@ int __init early_microcode_init(struct boot_info *bi)
return -ENODEV;
}
- microcode_grab_module(bi);
-
- if ( ucode_mod.mod_end || ucode_blob.size )
- rc = early_microcode_update_cpu();
+ rc = early_microcode_load(bi);
/*
* Some CPUID leaves and MSRs are only present after microcode updates
microcode_grab_module() and early_microcode_update_cpu() are logically one task that passes state via static variables. We intend to delete said static variables, so start by moving these functions out of early_microcode_init(). No functional change. Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> --- CC: Jan Beulich <JBeulich@suse.com> CC: Roger Pau Monné <roger.pau@citrix.com> CC: Daniel P. Smith <dpsmith@apertussolutions.com> --- xen/arch/x86/cpu/microcode/core.c | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-)