File xsa435-0-44.patch of Package xen.31135

From 921afcbae843bb3f575a8f4a270b8e6cf471f4ca Mon Sep 17 00:00:00 2001
From: Andrew Cooper <andrew.cooper3@citrix.com>
Date: Mon, 12 Jun 2023 20:24:00 +0100
Subject: x86/spec-ctrl: Fix the rendering of FB_CLEAR

FB_CLEAR is a read-only status bit, not a read-write control.  Move it from
"Hardware features" into "Hardware hints".

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

--- a/xen/arch/x86/spec_ctrl.c
+++ b/xen/arch/x86/spec_ctrl.c
@@ -420,7 +420,7 @@ static void __init print_details(enum in
      * Hardware read-only information, stating immunity to certain issues, or
      * suggestions of which mitigation to use.
      */
-    printk("  Hardware hints:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
+    printk("  Hardware hints:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
            (caps & ARCH_CAPS_RDCL_NO)                        ? " RDCL_NO"        : "",
            (caps & ARCH_CAPS_EIBRS)                          ? " EIBRS"          : "",
            (caps & ARCH_CAPS_RSBA)                           ? " RSBA"           : "",
@@ -433,6 +433,7 @@ static void __init print_details(enum in
            (caps & ARCH_CAPS_SBDR_SSDP_NO)                   ? " SBDR_SSDP_NO"   : "",
            (caps & ARCH_CAPS_FBSDP_NO)                       ? " FBSDP_NO"       : "",
            (caps & ARCH_CAPS_PSDP_NO)                        ? " PSDP_NO"        : "",
+           (caps & ARCH_CAPS_FB_CLEAR)                       ? " FB_CLEAR"       : "",
            (caps & ARCH_CAPS_PBRSB_NO)                       ? " PBRSB_NO"       : "",
            (e8b  & cpufeat_mask(X86_FEATURE_IBRS_ALWAYS))    ? " IBRS_ALWAYS"    : "",
            (e8b  & cpufeat_mask(X86_FEATURE_STIBP_ALWAYS))   ? " STIBP_ALWAYS"   : "",
@@ -442,7 +443,7 @@ static void __init print_details(enum in
            (e8b  & cpufeat_mask(X86_FEATURE_IBPB_RET))       ? " IBPB_RET"       : "");
 
     /* Hardware features which need driving to mitigate issues. */
-    printk("  Hardware features:%s%s%s%s%s%s%s%s%s%s%s%s\n",
+    printk("  Hardware features:%s%s%s%s%s%s%s%s%s%s%s\n",
            (e8b  & cpufeat_mask(X86_FEATURE_IBPB)) ||
            (_7d0 & cpufeat_mask(X86_FEATURE_IBRSB))          ? " IBPB"           : "",
            (e8b  & cpufeat_mask(X86_FEATURE_IBRS)) ||
@@ -458,7 +459,6 @@ static void __init print_details(enum in
            (_7d0 & cpufeat_mask(X86_FEATURE_SRBDS_CTRL))     ? " SRBDS_CTRL"     : "",
            (e8b  & cpufeat_mask(X86_FEATURE_VIRT_SSBD))      ? " VIRT_SSBD"      : "",
            (caps & ARCH_CAPS_TSX_CTRL)                       ? " TSX_CTRL"       : "",
-           (caps & ARCH_CAPS_FB_CLEAR)                       ? " FB_CLEAR"       : "",
            (caps & ARCH_CAPS_FB_CLEAR_CTRL)                  ? " FB_CLEAR_CTRL"  : "");
 
     /* Compiled-in support which pertains to mitigations. */