This is a note to let you know that I've just added the patch titled x86/microcode/AMD: Add a @cpu parameter to the reloading functions to the 5.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: x86-microcode-amd-add-a-cpu-parameter-to-the-reloading-functions.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From a5ad92134bd153a9ccdcddf09a95b088f36c3cce Mon Sep 17 00:00:00 2001 From: "Borislav Petkov (AMD)" <bp@xxxxxxxxx> Date: Thu, 26 Jan 2023 00:08:03 +0100 Subject: x86/microcode/AMD: Add a @cpu parameter to the reloading functions From: Borislav Petkov (AMD) <bp@xxxxxxxxx> commit a5ad92134bd153a9ccdcddf09a95b088f36c3cce upstream. Will be used in a subsequent change. Signed-off-by: Borislav Petkov (AMD) <bp@xxxxxxxxx> Link: https://lore.kernel.org/r/20230130161709.11615-3-bp@xxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/x86/include/asm/microcode.h | 4 ++-- arch/x86/include/asm/microcode_amd.h | 4 ++-- arch/x86/kernel/cpu/microcode/amd.c | 2 +- arch/x86/kernel/cpu/microcode/core.c | 6 +++--- 4 files changed, 8 insertions(+), 8 deletions(-) --- a/arch/x86/include/asm/microcode.h +++ b/arch/x86/include/asm/microcode.h @@ -131,7 +131,7 @@ static inline unsigned int x86_cpuid_fam int __init microcode_init(void); extern void __init load_ucode_bsp(void); extern void load_ucode_ap(void); -void reload_early_microcode(void); +void reload_early_microcode(unsigned int cpu); extern bool get_builtin_firmware(struct cpio_data *cd, const char *name); extern bool initrd_gone; void microcode_bsp_resume(void); @@ -139,7 +139,7 @@ void microcode_bsp_resume(void); static inline int __init microcode_init(void) { return 0; }; static inline void __init load_ucode_bsp(void) { } static inline void load_ucode_ap(void) { } -static inline void reload_early_microcode(void) { } +static inline void reload_early_microcode(unsigned int cpu) { } static inline void microcode_bsp_resume(void) { } static inline bool get_builtin_firmware(struct cpio_data *cd, const char *name) { return false; } --- a/arch/x86/include/asm/microcode_amd.h +++ b/arch/x86/include/asm/microcode_amd.h @@ -47,12 +47,12 @@ struct microcode_amd { extern void __init load_ucode_amd_bsp(unsigned int family); extern void load_ucode_amd_ap(unsigned int family); extern int __init save_microcode_in_initrd_amd(unsigned int family); -void reload_ucode_amd(void); +void reload_ucode_amd(unsigned int cpu); #else static inline void __init load_ucode_amd_bsp(unsigned int family) {} static inline void load_ucode_amd_ap(unsigned int family) {} static inline int __init save_microcode_in_initrd_amd(unsigned int family) { return -EINVAL; } -void reload_ucode_amd(void) {} +static inline void reload_ucode_amd(unsigned int cpu) {} #endif #endif /* _ASM_X86_MICROCODE_AMD_H */ --- a/arch/x86/kernel/cpu/microcode/amd.c +++ b/arch/x86/kernel/cpu/microcode/amd.c @@ -573,7 +573,7 @@ int __init save_microcode_in_initrd_amd( return 0; } -void reload_ucode_amd(void) +void reload_ucode_amd(unsigned int cpu) { struct microcode_amd *mc; u32 rev, dummy; --- a/arch/x86/kernel/cpu/microcode/core.c +++ b/arch/x86/kernel/cpu/microcode/core.c @@ -322,7 +322,7 @@ struct cpio_data find_microcode_in_initr #endif } -void reload_early_microcode(void) +void reload_early_microcode(unsigned int cpu) { int vendor, family; @@ -336,7 +336,7 @@ void reload_early_microcode(void) break; case X86_VENDOR_AMD: if (family >= 0x10) - reload_ucode_amd(); + reload_ucode_amd(cpu); break; default: break; @@ -782,7 +782,7 @@ void microcode_bsp_resume(void) if (uci->valid && uci->mc) microcode_ops->apply_microcode(cpu); else if (!uci->mc) - reload_early_microcode(); + reload_early_microcode(cpu); } static struct syscore_ops mc_syscore_ops = { Patches currently in stable-queue which might be from bp@xxxxxxxxx are queue-5.4/x86-speculation-allow-enabling-stibp-with-legacy-ibrs.patch queue-5.4/x86-microcode-amd-fix-mixed-steppings-support.patch queue-5.4/x86-microcode-amd-remove-load_microcode_amd-s-bsp-parameter.patch queue-5.4/x86-bugs-reset-speculation-control-settings-on-init.patch queue-5.4/documentation-hw-vuln-document-the-interaction-between-ibrs-and-stibp.patch queue-5.4/x86-microcode-amd-add-a-cpu-parameter-to-the-reloading-functions.patch