Merge branch 'for-next/entry' into for-next/core

* for-next/entry:
  arm64: el2_setup.h: Make __init_el2_fgt labels consistent, again
  arm64: Update comment regarding values in __boot_cpu_mode
  arm64/mm: Re-organise setting up FEAT_S1PIE registers PIRE0_EL1 and PIR_EL1
  arm64: enable PREEMPT_LAZY

Author: willdeacon

arch/arm64/Kconfig

@@ -42,6 +42,7 @@ config ARM64
 	select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
 	select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
 	select ARCH_HAS_NONLEAF_PMD_YOUNG if ARM64_HAFT
+	select ARCH_HAS_PREEMPT_LAZY
 	select ARCH_HAS_PTDUMP
 	select ARCH_HAS_PTE_DEVMAP
 	select ARCH_HAS_PTE_SPECIAL

arch/arm64/include/asm/el2_setup.h

@@ -204,19 +204,21 @@
 	orr	x0, x0, #(1 << 62)
 
 .Lskip_spe_fgt_\@:
+
+.Lset_debug_fgt_\@:
 	msr_s	SYS_HDFGRTR_EL2, x0
 	msr_s	SYS_HDFGWTR_EL2, x0
 
 	mov	x0, xzr
 	mrs	x1, id_aa64pfr1_el1
 	ubfx	x1, x1, #ID_AA64PFR1_EL1_SME_SHIFT, #4
-	cbz	x1, .Lskip_debug_fgt_\@
+	cbz	x1, .Lskip_sme_fgt_\@
 
 	/* Disable nVHE traps of TPIDR2 and SMPRI */
 	orr	x0, x0, #HFGxTR_EL2_nSMPRI_EL1_MASK
 	orr	x0, x0, #HFGxTR_EL2_nTPIDR2_EL0_MASK
 
-.Lskip_debug_fgt_\@:
+.Lskip_sme_fgt_\@:
 	mrs_s	x1, SYS_ID_AA64MMFR3_EL1
 	ubfx	x1, x1, #ID_AA64MMFR3_EL1_S1PIE_SHIFT, #4
 	cbz	x1, .Lskip_pie_fgt_\@
@@ -237,12 +239,14 @@
 	/* GCS depends on PIE so we don't check it if PIE is absent */
 	mrs_s	x1, SYS_ID_AA64PFR1_EL1
 	ubfx	x1, x1, #ID_AA64PFR1_EL1_GCS_SHIFT, #4
-	cbz	x1, .Lset_fgt_\@
+	cbz	x1, .Lskip_gce_fgt_\@
 
 	/* Disable traps of access to GCS registers at EL0 and EL1 */
 	orr	x0, x0, #HFGxTR_EL2_nGCS_EL1_MASK
 	orr	x0, x0, #HFGxTR_EL2_nGCS_EL0_MASK
 
+.Lskip_gce_fgt_\@:
+
 .Lset_fgt_\@:
 	msr_s	SYS_HFGRTR_EL2, x0
 	msr_s	SYS_HFGWTR_EL2, x0

arch/arm64/include/asm/thread_info.h

@@ -59,11 +59,12 @@ void arch_setup_new_exec(void);
 
 #define TIF_SIGPENDING		0	/* signal pending */
 #define TIF_NEED_RESCHED	1	/* rescheduling necessary */
-#define TIF_NOTIFY_RESUME	2	/* callback before returning to user */
-#define TIF_FOREIGN_FPSTATE	3	/* CPU's FP state is not current's */
-#define TIF_UPROBE		4	/* uprobe breakpoint or singlestep */
-#define TIF_MTE_ASYNC_FAULT	5	/* MTE Asynchronous Tag Check Fault */
-#define TIF_NOTIFY_SIGNAL	6	/* signal notifications exist */
+#define TIF_NEED_RESCHED_LAZY	2	/* Lazy rescheduling needed */
+#define TIF_NOTIFY_RESUME	3	/* callback before returning to user */
+#define TIF_FOREIGN_FPSTATE	4	/* CPU's FP state is not current's */
+#define TIF_UPROBE		5	/* uprobe breakpoint or singlestep */
+#define TIF_MTE_ASYNC_FAULT	6	/* MTE Asynchronous Tag Check Fault */
+#define TIF_NOTIFY_SIGNAL	7	/* signal notifications exist */
 #define TIF_SYSCALL_TRACE	8	/* syscall trace active */
 #define TIF_SYSCALL_AUDIT	9	/* syscall auditing */
 #define TIF_SYSCALL_TRACEPOINT	10	/* syscall tracepoint for ftrace */
@@ -85,6 +86,7 @@ void arch_setup_new_exec(void);
 
 #define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
 #define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
+#define _TIF_NEED_RESCHED_LAZY	(1 << TIF_NEED_RESCHED_LAZY)
 #define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
 #define _TIF_FOREIGN_FPSTATE	(1 << TIF_FOREIGN_FPSTATE)
 #define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
@@ -100,10 +102,10 @@ void arch_setup_new_exec(void);
 #define _TIF_NOTIFY_SIGNAL	(1 << TIF_NOTIFY_SIGNAL)
 #define _TIF_TSC_SIGSEGV	(1 << TIF_TSC_SIGSEGV)
 
-#define _TIF_WORK_MASK		(_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
+#define _TIF_WORK_MASK		(_TIF_NEED_RESCHED | _TIF_NEED_RESCHED_LAZY | \
 				 _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE | \
 				 _TIF_UPROBE | _TIF_MTE_ASYNC_FAULT | \
-				 _TIF_NOTIFY_SIGNAL)
+				 _TIF_NOTIFY_SIGNAL | _TIF_SIGPENDING)
 
 #define _TIF_SYSCALL_WORK	(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
 				 _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \

arch/arm64/include/asm/virt.h

@@ -67,7 +67,8 @@
  * __boot_cpu_mode records what mode CPUs were booted in.
  * A correctly-implemented bootloader must start all CPUs in the same mode:
  * In this case, both 32bit halves of __boot_cpu_mode will contain the
- * same value (either 0 if booted in EL1, BOOT_CPU_MODE_EL2 if booted in EL2).
+ * same value (either BOOT_CPU_MODE_EL1 if booted in EL1, BOOT_CPU_MODE_EL2 if
+ * booted in EL2).
  *
  * Should the bootloader fail to do this, the two values will be different.
  * This allows the kernel to flag an error when the secondaries have come up.

arch/arm64/kernel/asm-offsets.c

@@ -182,5 +182,7 @@ int main(void)
 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
   DEFINE(FTRACE_OPS_DIRECT_CALL,	offsetof(struct ftrace_ops, direct_call));
 #endif
+  DEFINE(PIE_E0_ASM, PIE_E0);
+  DEFINE(PIE_E1_ASM, PIE_E1);
   return 0;
 }

arch/arm64/kernel/entry-common.c

@@ -132,7 +132,7 @@ static void do_notify_resume(struct pt_regs *regs, unsigned long thread_flags)
 	do {
 		local_irq_enable();
 
-		if (thread_flags & _TIF_NEED_RESCHED)
+		if (thread_flags & (_TIF_NEED_RESCHED | _TIF_NEED_RESCHED_LAZY))
 			schedule();
 
 		if (thread_flags & _TIF_UPROBE)

arch/arm64/mm/proc.S

@@ -512,26 +512,11 @@ alternative_else_nop_endif
 	ubfx	x1, x1, #ID_AA64MMFR3_EL1_S1PIE_SHIFT, #4
 	cbz	x1, .Lskip_indirection
 
-	/*
-	 * The PROT_* macros describing the various memory types may resolve to
-	 * C expressions if they include the PTE_MAYBE_* macros, and so they
-	 * can only be used from C code. The PIE_E* constants below are also
-	 * defined in terms of those macros, but will mask out those
-	 * PTE_MAYBE_* constants, whether they are set or not. So #define them
-	 * as 0x0 here so we can evaluate the PIE_E* constants in asm context.
-	 */
-
-#define PTE_MAYBE_NG		0
-#define PTE_MAYBE_SHARED	0
-
-	mov_q	x0, PIE_E0
+	mov_q	x0, PIE_E0_ASM
 	msr	REG_PIRE0_EL1, x0
-	mov_q	x0, PIE_E1
+	mov_q	x0, PIE_E1_ASM
 	msr	REG_PIR_EL1, x0
 
-#undef PTE_MAYBE_NG
-#undef PTE_MAYBE_SHARED
-
 	orr	tcr2, tcr2, TCR2_EL1_PIE
 	msr	REG_TCR2_EL1, x0