[xen staging] x86/ucode: Explain what microcode_set_module() does

[patchbot@xxxxxxx]

commit 2802b77abe3a89ab6f60f85b804714a88b4faa1c
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Mon Mar 27 15:21:29 2023 +0100
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Thu Oct 24 17:57:59 2024 +0100

    x86/ucode: Explain what microcode_set_module() does
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Reviewed-by: Alejandro Vallejo <alejandro.vallejo@xxxxxxxxx>
---
 xen/arch/x86/cpu/microcode/core.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/xen/arch/x86/cpu/microcode/core.c 
b/xen/arch/x86/cpu/microcode/core.c
index 1e5fdd02e4..2a4c65744f 100644
--- a/xen/arch/x86/cpu/microcode/core.c
+++ b/xen/arch/x86/cpu/microcode/core.c
@@ -109,6 +109,10 @@ static bool ucode_in_nmi = true;
 /* Protected by microcode_mutex */
 static const struct microcode_patch *microcode_cache;
 
+/*
+ * Used by the EFI path only, when xen.cfg identifies an explicit microcode
+ * file.  Overrides ucode=<int>|scan on the regular command line.
+ */
 void __init microcode_set_module(unsigned int idx)
 {
     ucode_mod_idx = idx;
--
generated by git-patchbot for /home/xen/git/xen.git#staging