kernel/SOURCES/1031-x86-microcode-Remove-request_microcode_user.patch

From a53f36400559990c1a3716f11ecb46c03cc7cde7 Mon Sep 17 00:00:00 2001
From: Borislav Petkov <bp@suse.de>
Date: Thu, 25 Aug 2022 09:51:57 +0200
Subject: [PATCH 17/36] x86/microcode: Remove ->request_microcode_user()

  181b6f40e9ea ("x86/microcode: Rip out the OLD_INTERFACE")

removed the old microcode loading interface but forgot to remove the
related ->request_microcode_user() functionality which it uses.

Rip it out now too.

Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220825075445.28171-1-bp@alien8.de
(cherry picked from commit 8c61eafd22d7207039bff85c6e1d386f15abd17e)
Signed-off-by: Mridula Shastry <mridula.c.shastry@oracle.com>
Reviewed-by: Todd Vierling <todd.vierling@oracle.com>
---
 arch/x86/include/asm/microcode.h      |  3 ---
 arch/x86/kernel/cpu/microcode/amd.c   |  7 -------
 arch/x86/kernel/cpu/microcode/intel.c | 17 -----------------
 3 files changed, 27 deletions(-)

diff --git a/arch/x86/include/asm/microcode.h b/arch/x86/include/asm/microcode.h
index a930a63d1260..215ea340e7f9 100644
--- a/arch/x86/include/asm/microcode.h
+++ b/arch/x86/include/asm/microcode.h
@@ -32,9 +32,6 @@ enum ucode_state {
 };
 
 struct microcode_ops {
-	enum ucode_state (*request_microcode_user) (int cpu,
-				const void __user *buf, size_t size);
-
 	enum ucode_state (*request_microcode_fw) (int cpu, struct device *,
 						  bool refresh_fw);
 
diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c
index 0b557d04be22..9d15b7e5a13e 100644
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -929,12 +929,6 @@ static enum ucode_state request_microcode_amd(int cpu, struct device *device,
 	return ret;
 }
 
-static enum ucode_state
-request_microcode_user(int cpu, const void __user *buf, size_t size)
-{
-	return UCODE_ERROR;
-}
-
 static void microcode_fini_cpu_amd(int cpu)
 {
 	struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
@@ -943,7 +937,6 @@ static void microcode_fini_cpu_amd(int cpu)
 }
 
 static struct microcode_ops microcode_amd_ops = {
-	.request_microcode_user           = request_microcode_user,
 	.request_microcode_fw             = request_microcode_amd,
 	.collect_cpu_info                 = collect_cpu_info_amd,
 	.apply_microcode                  = apply_microcode_amd,
diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index 5f8223909db4..6fa667192bd9 100644
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -952,24 +952,7 @@ static enum ucode_state request_microcode_fw(int cpu, struct device *device,
 	return ret;
 }
 
-static enum ucode_state
-request_microcode_user(int cpu, const void __user *buf, size_t size)
-{
-	struct iov_iter iter;
-	struct iovec iov;
-
-	if (is_blacklisted(cpu))
-		return UCODE_NFOUND;
-
-	iov.iov_base = (void __user *)buf;
-	iov.iov_len = size;
-	iov_iter_init(&iter, WRITE, &iov, 1, size);
-
-	return generic_load_microcode(cpu, &iter);
-}
-
 static struct microcode_ops microcode_intel_ops = {
-	.request_microcode_user		  = request_microcode_user,
 	.request_microcode_fw             = request_microcode_fw,
 	.collect_cpu_info                 = collect_cpu_info,
 	.apply_microcode                  = apply_microcode_intel,
-- 
2.39.3