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Commit f72c1a57 authored by Borislav Petkov's avatar Borislav Petkov Committed by Borislav Petkov
Browse files

x86, microcode, AMD: Add a vendor-specific exit function 



This will be used to do cleanup work before the driver exits.

Signed-off-by: default avatarBorislav Petkov <borislav.petkov@amd.com>
parent dc47ce90

arch/x86/include/asm/microcode.h

+2 −0
Original line number Diff line number Diff line
@@ -48,6 +48,7 @@ static inline struct microcode_ops * __init init_intel_microcode(void) 


#ifdef CONFIG_MICROCODE_AMD

extern struct microcode_ops * __init init_amd_microcode(void);

extern void __exit exit_amd_microcode(void);



static inline void get_ucode_data(void *to, const u8 *from, size_t n)

{
@@ -59,6 +60,7 @@ static inline struct microcode_ops * __init init_amd_microcode(void) 
{

	return NULL;

}

static inline void __exit exit_amd_microcode(void) {}

#endif



#endif /* _ASM_X86_MICROCODE_H */

arch/x86/kernel/microcode_amd.c

+4 −0
Original line number Diff line number Diff line
@@ -353,3 +353,7 @@ struct microcode_ops * __init init_amd_microcode(void) 
{

	return &microcode_amd_ops;

}



void __exit exit_amd_microcode(void)

{

}

arch/x86/kernel/microcode_core.c

+5 −0
Original line number Diff line number Diff line
@@ -563,6 +563,8 @@ module_init(microcode_init); 


static void __exit microcode_exit(void)

{

	struct cpuinfo_x86 *c = &cpu_data(0);



	microcode_dev_exit();



	unregister_hotcpu_notifier(&mc_cpu_notifier);
@@ -580,6 +582,9 @@ static void __exit microcode_exit(void) 


	microcode_ops = NULL;



	if (c->x86_vendor == X86_VENDOR_AMD)

		exit_amd_microcode();



	pr_info("Microcode Update Driver: v" MICROCODE_VERSION " removed.\n");

}

module_exit(microcode_exit);