x86, microcode: Add a refresh firmware flag to ->request_microcode_fw

This is done in preparation for teaching the ucode driver to either load
a new ucode patches container from userspace or use an already cached
version. No functionality change in this patch.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Link: http://lkml.kernel.org/r/1344361461-10076-10-git-send-email-bp@amd64.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

4 files changed, 12 insertions, 9 deletions

diff --git a/arch/x86/include/asm/microcode.h b/arch/x86/include/asm/microcode.h
index 8813be600995..43d921b4752c 100644
--- a/arch/x86/include/asm/microcode.h
+++ b/arch/x86/include/asm/microcode.h
@@ -15,8 +15,8 @@ struct microcode_ops {
         enum ucode_state (*request_microcode_user) (int cpu,
                                 const void __user *buf, size_t size);
 
-        enum ucode_state (*request_microcode_fw) (int cpu,
-                                struct device *device);
+        enum ucode_state (*request_microcode_fw) (int cpu, struct device *,
+                                                  bool refresh_fw);
 
         void (*microcode_fini_cpu) (int cpu);
 
diff --git a/arch/x86/kernel/microcode_amd.c b/arch/x86/kernel/microcode_amd.c
index 25d34b177482..94ecdaa24052 100644
--- a/arch/x86/kernel/microcode_amd.c
+++ b/arch/x86/kernel/microcode_amd.c
@@ -330,7 +330,8 @@ out:
  *
  * These might be larger than 2K.
  */
-static enum ucode_state request_microcode_amd(int cpu, struct device *device)
+static enum ucode_state request_microcode_amd(int cpu, struct device *device,
+                                              bool refresh_fw)
 {
         char fw_name[36] = "amd-ucode/microcode_amd.bin";
         const struct firmware *fw;
diff --git a/arch/x86/kernel/microcode_core.c b/arch/x86/kernel/microcode_core.c
index dcde544e012c..9420972e98fe 100644
--- a/arch/x86/kernel/microcode_core.c
+++ b/arch/x86/kernel/microcode_core.c
@@ -282,7 +282,7 @@ static int reload_for_cpu(int cpu)
         if (!uci->valid)
                 return err;
 
-        ustate = microcode_ops->request_microcode_fw(cpu, &microcode_pdev->dev);
+        ustate = microcode_ops->request_microcode_fw(cpu, &microcode_pdev->dev, true);
         if (ustate == UCODE_OK)
                 apply_microcode_on_target(cpu);
         else
@@ -377,7 +377,7 @@ static enum ucode_state microcode_resume_cpu(int cpu)
         return UCODE_OK;
 }
 
-static enum ucode_state microcode_init_cpu(int cpu)
+static enum ucode_state microcode_init_cpu(int cpu, bool refresh_fw)
 {
         enum ucode_state ustate;
 
@@ -388,7 +388,8 @@ static enum ucode_state microcode_init_cpu(int cpu)
         if (system_state != SYSTEM_RUNNING)
                 return UCODE_NFOUND;
 
-        ustate = microcode_ops->request_microcode_fw(cpu, &microcode_pdev->dev);
+        ustate = microcode_ops->request_microcode_fw(cpu, &microcode_pdev->dev,
+                                                     refresh_fw);
 
         if (ustate == UCODE_OK) {
                 pr_debug("CPU%d updated upon init\n", cpu);
@@ -405,7 +406,7 @@ static enum ucode_state microcode_update_cpu(int cpu)
         if (uci->valid)
                 return microcode_resume_cpu(cpu);
 
-        return microcode_init_cpu(cpu);
+        return microcode_init_cpu(cpu, false);
 }
 
 static int mc_device_add(struct device *dev, struct subsys_interface *sif)
@@ -421,7 +422,7 @@ static int mc_device_add(struct device *dev, struct subsys_interface *sif)
         if (err)
                 return err;
 
-        if (microcode_init_cpu(cpu) == UCODE_ERROR)
+        if (microcode_init_cpu(cpu, true) == UCODE_ERROR)
                 return -EINVAL;
 
         return err;
diff --git a/arch/x86/kernel/microcode_intel.c b/arch/x86/kernel/microcode_intel.c
index 0327e2b3c408..3544aed39338 100644
--- a/arch/x86/kernel/microcode_intel.c
+++ b/arch/x86/kernel/microcode_intel.c
@@ -405,7 +405,8 @@ static int get_ucode_fw(void *to, const void *from, size_t n)
         return 0;
 }
 
-static enum ucode_state request_microcode_fw(int cpu, struct device *device)
+static enum ucode_state request_microcode_fw(int cpu, struct device *device,
+                                             bool refresh_fw)
 {
         char name[30];
         struct cpuinfo_x86 *c = &cpu_data(cpu);