Merge tag 'parisc-for-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

Pull parisc architecture updates from Helge Deller:

 - On parisc we now use the generic clockevent framework for timekeeping

 - Although there is no 64-bit glibc/userspace for parisc yet, for
   testing purposes one can run statically linked 64-bit binaries. This
   patchset contains two patches which fix 64-bit userspace which has
   been broken since kernel 4.19

 - Fix the userspace stack position and size when the ADDR_NO_RANDOMIZE
   personality is enabled

 - On other architectures mmap(MAP_GROWSDOWN | MAP_STACK) creates a
   downward-growing stack. On parisc mmap(MAP_STACK) is now sufficient
   to create an upward-growing stack

* tag 'parisc-for-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Allow mmap(MAP_STACK) memory to automatically expand upwards
  parisc: Use PRIV_USER instead of hardcoded value
  parisc: Fix itlb miss handler for 64-bit programs
  parisc: Fix 64-bit userspace syscall path
  parisc: Fix stack start for ADDR_NO_RANDOMIZE personality
  parisc: Convert to generic clockevents
  parisc: pdc_stable: Constify struct kobj_type

Author: torvalds

arch/parisc/Kconfig

@@ -72,7 +72,7 @@ config PARISC
 	select GENERIC_SCHED_CLOCK
 	select GENERIC_IRQ_MIGRATION if SMP
 	select HAVE_UNSTABLE_SCHED_CLOCK if SMP
-	select LEGACY_TIMER_TICK
+	select GENERIC_CLOCKEVENTS
 	select CPU_NO_EFFICIENT_FFS
 	select THREAD_INFO_IN_TASK
 	select NEED_DMA_MAP_STATE

arch/parisc/include/asm/mman.h

@@ -11,4 +11,18 @@ static inline bool arch_memory_deny_write_exec_supported(void)
 }
 #define arch_memory_deny_write_exec_supported arch_memory_deny_write_exec_supported
 
+static inline unsigned long arch_calc_vm_flag_bits(unsigned long flags)
+{
+	/*
+	 * The stack on parisc grows upwards, so if userspace requests memory
+	 * for a stack, mark it with VM_GROWSUP so that the stack expansion in
+	 * the fault handler will work.
+	 */
+	if (flags & MAP_STACK)
+		return VM_GROWSUP;
+
+	return 0;
+}
+#define arch_calc_vm_flag_bits(flags) arch_calc_vm_flag_bits(flags)
+
 #endif /* __ASM_MMAN_H__ */

arch/parisc/include/asm/processor.h

@@ -298,7 +298,7 @@ extern unsigned int toc_handler_csum;
 extern void do_cpu_irq_mask(struct pt_regs *);
 extern irqreturn_t timer_interrupt(int, void *);
 extern irqreturn_t ipi_interrupt(int, void *);
-extern void start_cpu_itimer(void);
+extern void parisc_clockevent_init(void);
 extern void handle_interruption(int, struct pt_regs *);
 
 /* called from assembly code: */

arch/parisc/kernel/entry.S

@@ -1051,17 +1051,15 @@ ENTRY_CFI(intr_save)		/* for os_hpmc */
 	STREG           %r16, PT_ISR(%r29)
 	STREG           %r17, PT_IOR(%r29)
 
-#if 0 && defined(CONFIG_64BIT)
-	/* Revisit when we have 64-bit code above 4Gb */
+#if defined(CONFIG_64BIT)
 	b,n		intr_save2
 
 skip_save_ior:
 	/* We have a itlb miss, and when executing code above 4 Gb on ILP64, we
 	 * need to adjust iasq/iaoq here in the same way we adjusted isr/ior
 	 * above.
 	 */
-	extrd,u,*	%r8,PSW_W_BIT,1,%r1
-	cmpib,COND(=),n	1,%r1,intr_save2
+	bb,COND(>=),n	%r8,PSW_W_BIT,intr_save2
 	LDREG		PT_IASQ0(%r29), %r16
 	LDREG		PT_IAOQ0(%r29), %r17
 	/* adjust iasq/iaoq */

arch/parisc/kernel/smp.c

@@ -297,7 +297,7 @@ smp_cpu_init(int cpunum)
 	enter_lazy_tlb(&init_mm, current);
 
 	init_IRQ();   /* make sure no IRQs are enabled or pending */
-	start_cpu_itimer();
+	parisc_clockevent_init();
 }
 
 

arch/parisc/kernel/syscall.S

@@ -243,10 +243,10 @@ linux_gateway_entry:
 
 #ifdef CONFIG_64BIT
 	ldil	L%sys_call_table, %r1
-	or,=	%r2,%r2,%r2
-	addil	L%(sys_call_table64-sys_call_table), %r1
+	or,ev	%r2,%r2,%r2
+	ldil	L%sys_call_table64, %r1
 	ldo	R%sys_call_table(%r1), %r19
-	or,=	%r2,%r2,%r2
+	or,ev	%r2,%r2,%r2
 	ldo	R%sys_call_table64(%r1), %r19
 #else
 	load32	sys_call_table, %r19
@@ -379,10 +379,10 @@ tracesys_next:
 	extrd,u	%r19,63,1,%r2			/* W hidden in bottom bit */
 
 	ldil	L%sys_call_table, %r1
-	or,=	%r2,%r2,%r2
-	addil	L%(sys_call_table64-sys_call_table), %r1
+	or,ev	%r2,%r2,%r2
+	ldil	L%sys_call_table64, %r1
 	ldo	R%sys_call_table(%r1), %r19
-	or,=	%r2,%r2,%r2
+	or,ev	%r2,%r2,%r2
 	ldo	R%sys_call_table64(%r1), %r19
 #else
 	load32	sys_call_table, %r19
@@ -1327,6 +1327,8 @@ ENTRY(sys_call_table)
 END(sys_call_table)
 
 #ifdef CONFIG_64BIT
+#undef __SYSCALL_WITH_COMPAT
+#define __SYSCALL_WITH_COMPAT(nr, native, compat)	__SYSCALL(nr, native)
 	.align 8
 ENTRY(sys_call_table64)
 #include <asm/syscall_table_64.h>    /* 64-bit syscalls */