Merge tag 'x86_core_for_v6.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 cpu updates from Borislav Petkov:

 - Add helpers for WB{NO,}INVD with the purpose of using them in KVM and
   thus diminish the number of invalidations needed. With preceding
   cleanups, as always

* tag 'x86_core_for_v6.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/lib: Add WBINVD and WBNOINVD helpers to target multiple CPUs
  x86/lib: Add WBNOINVD helper functions
  x86/lib: Drop the unused return value from wbinvd_on_all_cpus()
  drm/gpu: Remove dead checks on wbinvd_on_all_cpus()'s return value

1 files changed, 20 insertions, 3 deletions

diff --git a/arch/x86/include/asm/smp.h b/arch/x86/include/asm/smp.h
index 0c1c68039d6f..22bfebe6776d 100644
--- a/arch/x86/include/asm/smp.h
+++ b/arch/x86/include/asm/smp.h
@@ -112,7 +112,10 @@ void __noreturn hlt_play_dead(void);
 void native_play_dead(void);
 void play_dead_common(void);
 void wbinvd_on_cpu(int cpu);
-int wbinvd_on_all_cpus(void);
+void wbinvd_on_all_cpus(void);
+void wbinvd_on_cpus_mask(struct cpumask *cpus);
+void wbnoinvd_on_all_cpus(void);
+void wbnoinvd_on_cpus_mask(struct cpumask *cpus);
 
 void smp_kick_mwait_play_dead(void);
 void __noreturn mwait_play_dead(unsigned int eax_hint);
@@ -148,10 +151,24 @@ static inline struct cpumask *cpu_l2c_shared_mask(int cpu)
 
 #else /* !CONFIG_SMP */
 #define wbinvd_on_cpu(cpu)     wbinvd()
-static inline int wbinvd_on_all_cpus(void)
+static inline void wbinvd_on_all_cpus(void)
 {
 	wbinvd();
-	return 0;
+}
+
+static inline void wbinvd_on_cpus_mask(struct cpumask *cpus)
+{
+	wbinvd();
+}
+
+static inline void wbnoinvd_on_all_cpus(void)
+{
+	wbnoinvd();
+}
+
+static inline void wbnoinvd_on_cpus_mask(struct cpumask *cpus)
+{
+	wbnoinvd();
 }
 
 static inline struct cpumask *cpu_llc_shared_mask(int cpu)