pve-kernel-lowlatency-qoup/patches/kernel/0020-sparc-cpu-Switch-to-arch_cpu_finalize_init.patch
Stoiko Ivanov 9dd7462461 add fixes for downfall
by cherry-picking the relevant commits from launchpad/lunar [0].
(relevant commits are based on k.o/stable commits for this)

minimally tested by booting my (ryzen) machine with this kernel and
skimming through dmesg after boot.

[0] git://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/lunar

Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
2023-08-16 09:56:23 +02:00

81 lines
2.6 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 14 Jun 2023 01:39:35 +0200
Subject: [PATCH] sparc/cpu: Switch to arch_cpu_finalize_init()
check_bugs() is about to be phased out. Switch over to the new
arch_cpu_finalize_init() implementation.
No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://lore.kernel.org/r/20230613224545.431995857@linutronix.de
(cherry picked from commit 44ade508e3bfac45ae97864587de29eb1a881ec0)
CVE-2022-40982
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Acked-by: Roxana Nicolescu <roxana.nicolescu@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
(cherry picked from commit 5f02f99c6d6fd4f2c7b77f6d01bac14cc6fae2f6)
Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
---
arch/sparc/Kconfig | 1 +
arch/sparc/include/asm/bugs.h | 18 ------------------
arch/sparc/kernel/setup_32.c | 7 +++++++
3 files changed, 8 insertions(+), 18 deletions(-)
delete mode 100644 arch/sparc/include/asm/bugs.h
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index dbb1760cbe8c..b67d96e3392e 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -51,6 +51,7 @@ config SPARC
config SPARC32
def_bool !64BIT
select ARCH_32BIT_OFF_T
+ select ARCH_HAS_CPU_FINALIZE_INIT if !SMP
select ARCH_HAS_SYNC_DMA_FOR_CPU
select CLZ_TAB
select DMA_DIRECT_REMAP
diff --git a/arch/sparc/include/asm/bugs.h b/arch/sparc/include/asm/bugs.h
deleted file mode 100644
index 02fa369b9c21..000000000000
--- a/arch/sparc/include/asm/bugs.h
+++ /dev/null
@@ -1,18 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/* include/asm/bugs.h: Sparc probes for various bugs.
- *
- * Copyright (C) 1996, 2007 David S. Miller (davem@davemloft.net)
- */
-
-#ifdef CONFIG_SPARC32
-#include <asm/cpudata.h>
-#endif
-
-extern unsigned long loops_per_jiffy;
-
-static void __init check_bugs(void)
-{
-#if defined(CONFIG_SPARC32) && !defined(CONFIG_SMP)
- cpu_data(0).udelay_val = loops_per_jiffy;
-#endif
-}
diff --git a/arch/sparc/kernel/setup_32.c b/arch/sparc/kernel/setup_32.c
index c8e0dd99f370..c9d1ba4f311b 100644
--- a/arch/sparc/kernel/setup_32.c
+++ b/arch/sparc/kernel/setup_32.c
@@ -412,3 +412,10 @@ static int __init topology_init(void)
}
subsys_initcall(topology_init);
+
+#if defined(CONFIG_SPARC32) && !defined(CONFIG_SMP)
+void __init arch_cpu_finalize_init(void)
+{
+ cpu_data(0).udelay_val = loops_per_jiffy;
+}
+#endif