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