1 files changed, 67 insertions, 0 deletions
diff --git a/linux-kernel-patches/09-cfb52a5a09c8ae3a1dafb44ce549fde5b69e8117.patch b/linux-kernel-patches/09-cfb52a5a09c8ae3a1dafb44ce549fde5b69e8117.patch
new file mode 100644
index 0000000..0541a2b
--- /dev/null
+++ b/linux-kernel-patches/09-cfb52a5a09c8ae3a1dafb44ce549fde5b69e8117.patch
@@ -0,0 +1,67 @@
+From cfb52a5a09c8ae3a1dafb44ce549fde5b69e8117 Mon Sep 17 00:00:00 2001
+From: Borislav Petkov <bp@suse.de>
+Date: Wed, 28 Feb 2018 11:28:45 +0100
+Subject: x86/microcode: Request microcode on the BSP
+
+... so that any newer version can land in the cache and can later be
+fished out by the application functions. Do that before grabbing the
+hotplug lock.
+
+Signed-off-by: Borislav Petkov <bp@suse.de>
+Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
+Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
+Tested-by: Ashok Raj <ashok.raj@intel.com>
+Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
+Cc: Arjan Van De Ven <arjan.van.de.ven@intel.com>
+Link: https://lkml.kernel.org/r/20180228102846.13447-7-bp@alien8.de
+---
+ arch/x86/kernel/cpu/microcode/core.c | 11 +++++------
+ 1 file changed, 5 insertions(+), 6 deletions(-)
+
+diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
+index fa32cb3..5dd157d 100644
+--- a/arch/x86/kernel/cpu/microcode/core.c
++++ b/arch/x86/kernel/cpu/microcode/core.c
+@@ -499,15 +499,10 @@ static int check_online_cpus(void)
+ static enum ucode_state reload_for_cpu(int cpu)
+ {
+ 	struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
+-	enum ucode_state ustate;
+ 
+ 	if (!uci->valid)
+ 		return UCODE_OK;
+ 
+-	ustate = microcode_ops->request_microcode_fw(cpu, &microcode_pdev->dev, true);
+-	if (ustate != UCODE_OK)
+-		return ustate;
+-
+ 	return apply_microcode_on_target(cpu);
+ }
+ 
+@@ -515,11 +510,11 @@ static ssize_t reload_store(struct device *dev,
+ 			    struct device_attribute *attr,
+ 			    const char *buf, size_t size)
+ {
++	int cpu, bsp = boot_cpu_data.cpu_index;
+ 	enum ucode_state tmp_ret = UCODE_OK;
+ 	bool do_callback = false;
+ 	unsigned long val;
+ 	ssize_t ret = 0;
+-	int cpu;
+ 
+ 	ret = kstrtoul(buf, 0, &val);
+ 	if (ret)
+@@ -528,6 +523,10 @@ static ssize_t reload_store(struct device *dev,
+ 	if (val != 1)
+ 		return size;
+ 
++	tmp_ret = microcode_ops->request_microcode_fw(bsp, &microcode_pdev->dev, true);
++	if (tmp_ret != UCODE_OK)
++		return size;
++
+ 	get_online_cpus();
+ 
+ 	ret = check_online_cpus();
+-- 
+cgit v1.1
+