Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 as permitted sender) client-ip=23.128.96.37;
Message-ID: <20231010150702.662293885@linutronix.de>
From:   Thomas Gleixner <tglx@linutronix.de>
To:     LKML <linux-kernel@vger.kernel.org>
Cc:     x86@kernel.org, Borislav Petkov <bp@alien8.de>
Subject: [patch 5/5] x86/microcode: Mop up early loading leftovers
References: <20231010145130.987300357@linutronix.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Date:   Tue, 10 Oct 2023 17:08:46 +0200 (CEST)
Precedence: bulk

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@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(-)

--- 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_initr
 	 * 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;
 
--- 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_fam
 	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);