Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/…

…git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "I've picked up a handful of arm64 fixes while Catalin's been away, so
  here they are. Below is the usual summary, but we have basically have
  two cleanups, a fix for an SME crash and a fix for hibernation:

   - Fix saving of SME state after SVE vector length is changed

   - Fix sparse warnings for missing vDSO function prototypes

   - Fix hibernation resume path when kfence is enabled

   - Fix field names for the HFGxTR_EL2 register"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64/fpsimd: Ensure SME storage is allocated after SVE VL changes
  arm64: vdso: Clear common make C=2 warnings
  arm64: mm: Make hibernation aware of KFENCE
  arm64: Fix HFGxTR_EL2 field naming

arch/arm64/kernel/fpsimd.c

@@ -847,6 +847,8 @@ void sve_sync_from_fpsimd_zeropad(struct task_struct *task)
 int vec_set_vector_length(struct task_struct *task, enum vec_type type,
 			  unsigned long vl, unsigned long flags)
 {
+	bool free_sme = false;
+
 	if (flags & ~(unsigned long)(PR_SVE_VL_INHERIT |
 				     PR_SVE_SET_VL_ONEXEC))
 		return -EINVAL;
@@ -897,21 +899,36 @@ int vec_set_vector_length(struct task_struct *task, enum vec_type type,
 		task->thread.fp_type = FP_STATE_FPSIMD;
 	}
 
-	if (system_supports_sme() && type == ARM64_VEC_SME) {
-		task->thread.svcr &= ~(SVCR_SM_MASK |
-				       SVCR_ZA_MASK);
-		clear_thread_flag(TIF_SME);
+	if (system_supports_sme()) {
+		if (type == ARM64_VEC_SME ||
+		    !(task->thread.svcr & (SVCR_SM_MASK | SVCR_ZA_MASK))) {
+			/*
+			 * We are changing the SME VL or weren't using
+			 * SME anyway, discard the state and force a
+			 * reallocation.
+			 */
+			task->thread.svcr &= ~(SVCR_SM_MASK |
+					       SVCR_ZA_MASK);
+			clear_thread_flag(TIF_SME);
+			free_sme = true;
+		}
 	}
 
 	if (task == current)
 		put_cpu_fpsimd_context();
 
 	/*
-	 * Force reallocation of task SVE and SME state to the correct
-	 * size on next use:
+	 * Free the changed states if they are not in use, SME will be
+	 * reallocated to the correct size on next use and we just
+	 * allocate SVE now in case it is needed for use in streaming
+	 * mode.
 	 */
-	sve_free(task);
-	if (system_supports_sme() && type == ARM64_VEC_SME)
+	if (system_supports_sve()) {
+		sve_free(task);
+		sve_alloc(task, true);
+	}
+
+	if (free_sme)
 		sme_free(task);
 
 	task_set_vl(task, type, vl);

arch/arm64/kernel/vdso/vgettimeofday.c

@@ -6,6 +6,10 @@
  *
  */
 
+int __kernel_clock_gettime(clockid_t clock, struct __kernel_timespec *ts);
+int __kernel_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz);
+int __kernel_clock_getres(clockid_t clock_id, struct __kernel_timespec *res);
+
 int __kernel_clock_gettime(clockid_t clock,
 			   struct __kernel_timespec *ts)
 {

arch/arm64/mm/trans_pgd.c

@@ -24,6 +24,7 @@
 #include <linux/bug.h>
 #include <linux/mm.h>
 #include <linux/mmzone.h>
+#include <linux/kfence.h>
 
 static void *trans_alloc(struct trans_pgd_info *info)
 {
@@ -41,7 +42,8 @@ static void _copy_pte(pte_t *dst_ptep, pte_t *src_ptep, unsigned long addr)
 		 * the temporary mappings we use during restore.
 		 */
 		set_pte(dst_ptep, pte_mkwrite(pte));
-	} else if (debug_pagealloc_enabled() && !pte_none(pte)) {
+	} else if ((debug_pagealloc_enabled() ||
+		   is_kfence_address((void *)addr)) && !pte_none(pte)) {
 		/*
 		 * debug_pagealloc will removed the PTE_VALID bit if
 		 * the page isn't in use by the resume kernel. It may have

arch/arm64/tools/sysreg

@@ -2017,7 +2017,7 @@ Field	0	SM
 EndSysreg
 
 SysregFields	HFGxTR_EL2
-Field	63	nAMIAIR2_EL1
+Field	63	nAMAIR2_EL1
 Field	62	nMAIR2_EL1
 Field	61	nS2POR_EL1
 Field	60	nPOR_EL1
@@ -2032,9 +2032,9 @@ Field	52	nGCS_EL0
 Res0	51
 Field	50	nACCDATA_EL1
 Field	49	ERXADDR_EL1
-Field	48	EXRPFGCDN_EL1
-Field	47	EXPFGCTL_EL1
-Field	46	EXPFGF_EL1
+Field	48	ERXPFGCDN_EL1
+Field	47	ERXPFGCTL_EL1
+Field	46	ERXPFGF_EL1
 Field	45	ERXMISCn_EL1
 Field	44	ERXSTATUS_EL1
 Field	43	ERXCTLR_EL1
@@ -2049,8 +2049,8 @@ Field	35	TPIDR_EL0
 Field	34	TPIDRRO_EL0
 Field	33	TPIDR_EL1
 Field	32	TCR_EL1
-Field	31	SCTXNUM_EL0
-Field	30	SCTXNUM_EL1
+Field	31	SCXTNUM_EL0
+Field	30	SCXTNUM_EL1
 Field	29	SCTLR_EL1
 Field	28	REVIDR_EL1
 Field	27	PAR_EL1