x86/retbleed: Add fine grained Kconfig knobs

[platform/kernel/linux-rpi.git] / arch / x86 / kernel / cpu / amd.c

diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 92d8d8d..8b1bf1c 100644 (file)
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -888,6 +888,7 @@ static void init_amd_bd(struct cpuinfo_x86 *c)
 
 void init_spectral_chicken(struct cpuinfo_x86 *c)
 {
+#ifdef CONFIG_CPU_UNRET_ENTRY
        u64 value;
 
        /*
@@ -904,6 +905,7 @@ void init_spectral_chicken(struct cpuinfo_x86 *c)
                        wrmsrl_safe(MSR_ZEN2_SPECTRAL_CHICKEN, value);
                }
        }
+#endif
 }
 
 static void init_amd_zn(struct cpuinfo_x86 *c)