70 lines
2.1 KiB
Diff
70 lines
2.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Ashok Raj <ashok.raj@intel.com>
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Date: Sat, 20 Jul 2019 14:14:47 +0000
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Subject: [PATCH] x86/microcode: echo 2 > reload to force load ucode.
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If you want to force a ucode load even if the version
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doesn't change try this
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To just do a normal upgrade where new rev > current rev
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Signed-off-by: Ashok Raj <ashok.raj@intel.com>
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---
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arch/x86/kernel/cpu/microcode/core.c | 8 +++++++-
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arch/x86/kernel/cpu/microcode/intel.c | 2 +-
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2 files changed, 8 insertions(+), 2 deletions(-)
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diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
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index d44fe3e5c028..2b0e98ec22bc 100644
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--- a/arch/x86/kernel/cpu/microcode/core.c
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+++ b/arch/x86/kernel/cpu/microcode/core.c
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@@ -615,18 +615,23 @@ static ssize_t reload_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t size)
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{
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+ extern bool force_ucode_load;
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enum ucode_state tmp_ret = UCODE_OK;
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int bsp = boot_cpu_data.cpu_index;
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unsigned long val;
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+ bool orig_cmd_line = force_ucode_load;
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ssize_t ret = 0;
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ret = kstrtoul(buf, 0, &val);
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if (ret)
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return ret;
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- if (val != 1)
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+ if (!val || val > 2)
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return size;
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+ if (val == 2)
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+ force_ucode_load = true;
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+
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tmp_ret = microcode_ops->request_microcode_fw(bsp, µcode_pdev->dev, true);
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if (tmp_ret != UCODE_NEW)
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return size;
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@@ -642,6 +647,7 @@ static ssize_t reload_store(struct device *dev,
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mutex_unlock(µcode_mutex);
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put:
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+ force_ucode_load = orig_cmd_line;
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put_online_cpus();
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if (ret >= 0)
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diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
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index 9e85d785b226..5c67ac023f4a 100644
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--- a/arch/x86/kernel/cpu/microcode/intel.c
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+++ b/arch/x86/kernel/cpu/microcode/intel.c
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@@ -39,7 +39,7 @@
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#include <asm/msr.h>
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static const char ucode_path[] = "kernel/x86/microcode/GenuineIntel.bin";
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-static bool force_ucode_load = false;
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+bool force_ucode_load = false;
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/* Current microcode patch used in early patching on the APs. */
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static struct microcode_intel *intel_ucode_patch;
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--
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https://clearlinux.org
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