linux-kernel - [tip: x86/microcode] x86/microcode: Mop up early loading leftovers

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Date:   Wed, 11 Oct 2023 09:00:59 -0000
From:   "tip-bot2 for Thomas Gleixner" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        "Borislav Petkov (AMD)" <bp@...en8.de>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: x86/microcode] x86/microcode: Mop up early loading leftovers

The following commit has been merged into the x86/microcode branch of tip:

Commit-ID:     7edf8316660ee2966b8aed03a63d44496731f505
Gitweb:        https://git.kernel.org/tip/7edf8316660ee2966b8aed03a63d44496731f505
Author:        Thomas Gleixner <tglx@...utronix.de>
AuthorDate:    Tue, 10 Oct 2023 17:08:46 +02:00
Committer:     Borislav Petkov (AMD) <bp@...en8.de>
CommitterDate: Tue, 10 Oct 2023 21:17:58 +02:00

x86/microcode: Mop up early loading leftovers

Get rid of the initrd_gone hack which was required to keep
find_microcode_in_initrd() functional after init.

As find_microcode_in_initrd() is now only used during init, mark it
accordingly.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Link: https://lore.kernel.org/r/20231010150702.662293885@linutronix.de
---
 arch/x86/kernel/cpu/microcode/core.c     | 17 +----------------
 arch/x86/kernel/cpu/microcode/internal.h |  2 --
 2 files changed, 1 insertion(+), 18 deletions(-)

diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index 57dde24..18e0cdd 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -49,8 +49,6 @@ static bool dis_ucode_ldr = true;
 bool force_minrev = IS_ENABLED(CONFIG_MICROCODE_LATE_FORCE_MINREV);
 module_param(force_minrev, bool, S_IRUSR | S_IWUSR);
 
-bool initrd_gone;
-
 /*
  * Synchronization.
  *
@@ -185,15 +183,7 @@ void load_ucode_ap(void)
 	}
 }
 
-/* Temporary workaround until find_microcode_in_initrd() is __init */
-static int __init mark_initrd_gone(void)
-{
-	initrd_gone = true;
-	return 0;
-}
-fs_initcall(mark_initrd_gone);
-
-struct cpio_data find_microcode_in_initrd(const char *path)
+struct cpio_data __init find_microcode_in_initrd(const char *path)
 {
 #ifdef CONFIG_BLK_DEV_INITRD
 	unsigned long start = 0;
@@ -224,12 +214,7 @@ struct cpio_data find_microcode_in_initrd(const char *path)
 	 * has the virtual address of the beginning of the initrd. It also
 	 * possibly relocates the ramdisk. In either case, initrd_start contains
 	 * the updated address so use that instead.
-	 *
-	 * initrd_gone is for the hotplug case where we've thrown out initrd
-	 * already.
 	 */
-	if (initrd_gone)
-		return (struct cpio_data){ NULL, 0, "" };
 	if (initrd_start)
 		start = initrd_start;
 
diff --git a/arch/x86/kernel/cpu/microcode/internal.h b/arch/x86/kernel/cpu/microcode/internal.h
index 9930788..fc03a7b 100644
--- a/arch/x86/kernel/cpu/microcode/internal.h
+++ b/arch/x86/kernel/cpu/microcode/internal.h
@@ -90,8 +90,6 @@ static inline unsigned int x86_cpuid_family(void)
 	return x86_family(eax);
 }
 
-extern bool initrd_gone;
-
 #ifdef CONFIG_CPU_SUP_AMD
 void load_ucode_amd_bsp(unsigned int family);
 void load_ucode_amd_ap(unsigned int family);