Adding upstream version 6.7.7.upstream/6.7.7

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 14 insertions, 2 deletions

diff --git a/arch/arm64/kernel/suspend.c b/arch/arm64/kernel/suspend.c
index 0fbdf5fe64..eaaff94329 100644
--- a/arch/arm64/kernel/suspend.c
+++ b/arch/arm64/kernel/suspend.c
@@ -12,6 +12,7 @@
 #include <asm/daifflags.h>
 #include <asm/debug-monitors.h>
 #include <asm/exec.h>
+#include <asm/fpsimd.h>
 #include <asm/mte.h>
 #include <asm/memory.h>
 #include <asm/mmu_context.h>
@@ -55,13 +56,13 @@ void notrace __cpu_suspend_exit(void)
 
 	/* Restore CnP bit in TTBR1_EL1 */
 	if (system_supports_cnp())
-		cpu_replace_ttbr1(lm_alias(swapper_pg_dir), idmap_pg_dir);
+		cpu_enable_swapper_cnp();
 
 	/*
 	 * PSTATE was not saved over suspend/resume, re-enable any detected
 	 * features that might not have been set correctly.
 	 */
-	if (cpus_have_const_cap(ARM64_HAS_DIT))
+	if (alternative_has_cap_unlikely(ARM64_HAS_DIT))
 		set_pstate_dit(1);
 	__uaccess_enable_hw_pan();
 
@@ -80,6 +81,8 @@ void notrace __cpu_suspend_exit(void)
 	 */
 	spectre_v4_enable_mitigation(NULL);
 
+	sme_suspend_exit();
+
 	/* Restore additional feature-specific configuration */
 	ptrauth_suspend_exit();
 }
@@ -98,6 +101,15 @@ int cpu_suspend(unsigned long arg, int (*fn)(unsigned long))
 	struct sleep_stack_data state;
 	struct arm_cpuidle_irq_context context;
 
+	/*
+	 * Some portions of CPU state (e.g. PSTATE.{PAN,DIT}) are initialized
+	 * before alternatives are patched, but are only restored by
+	 * __cpu_suspend_exit() after alternatives are patched. To avoid
+	 * accidentally losing these bits we must not attempt to suspend until
+	 * after alternatives have been patched.
+	 */
+	WARN_ON(!system_capabilities_finalized());
+
 	/* Report any MTE async fault before going to suspend */
 	mte_suspend_enter();