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Subject[PATCH 1/5] x86, microcode, AMD: Add a vendor-specific exit function
Date
From: Borislav Petkov <borislav.petkov@amd.com>

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

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
---
arch/x86/include/asm/microcode.h | 2 ++
arch/x86/kernel/microcode_amd.c | 4 ++++
arch/x86/kernel/microcode_core.c | 5 +++++
3 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/microcode.h b/arch/x86/include/asm/microcode.h
index 2421507..4ebe157 100644
--- a/arch/x86/include/asm/microcode.h
+++ b/arch/x86/include/asm/microcode.h
@@ -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 */
diff --git a/arch/x86/kernel/microcode_amd.c b/arch/x86/kernel/microcode_amd.c
index d494799..e8a68c2 100644
--- a/arch/x86/kernel/microcode_amd.c
+++ b/arch/x86/kernel/microcode_amd.c
@@ -353,3 +353,7 @@ struct microcode_ops * __init init_amd_microcode(void)
{
return &microcode_amd_ops;
}
+
+void __exit exit_amd_microcode(void)
+{
+}
diff --git a/arch/x86/kernel/microcode_core.c b/arch/x86/kernel/microcode_core.c
index 9d46f5e..9302e2d 100644
--- a/arch/x86/kernel/microcode_core.c
+++ b/arch/x86/kernel/microcode_core.c
@@ -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);
--
1.7.8.rc0


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