Merge tag 'parisc-for-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

Pull parisc updates from Helge Deller:
 "Usual fixes and updates:

   - Add up to 12 nops after TLB inserts for PA8x00 CPUs as the
     specification requires (Dave Anglin)

   - Simplify the parisc smp_prepare_boot_cpu() code (Russell King)

   - Use 64-bit little-endian values in SBA IOMMU PDIR table for AGP

  Since there is upcoming support for booting a 64-bit kernel on QEMU,
  some corner cases were fixed and improvements added:

   - Fix 64-bit kernel crash in STI (graphics console) font setup code
     which miscalculated the font start address as it gets signed vs
     unsigned offsets wrong

   - Support building an uncompressed Linux kernel

   - Add support for soft power-off in qemu"

* tag 'parisc-for-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  fbdev: stifb: Make the STI next font pointer a 32-bit signed offset
  parisc: Show default CPU PSW.W setting as reported by PDC
  parisc/pdc: Add width field to struct pdc_model
  parisc: Add nop instructions after TLB inserts
  parisc: simplify smp_prepare_boot_cpu()
  parisc/agp: Use 64-bit LE values in SBA IOMMU PDIR table
  parisc/firmware: Use PDC constants for narrow/wide firmware
  parisc: Move parisc_narrow_firmware variable to header file
  parisc/power: Trivial whitespace cleanups and license update
  parisc/power: Add power soft-off when running on qemu
  parisc: Allow building uncompressed Linux kernel
  parisc: Add some missing PDC functions and constants
  parisc: sba-iommu: Fix comment when calculating IOC number

1 files changed, 28 insertions, 39 deletions

diff --git a/drivers/parisc/power.c b/drivers/parisc/power.c
index 6f5e5f0230d3..539d8920c202 100644
--- a/drivers/parisc/power.c
+++ b/drivers/parisc/power.c
@@ -1,38 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
- * linux/drivers/parisc/power.c
- * HP PARISC soft power switch support driver
- *
- * Copyright (c) 2001-2007 Helge Deller <deller@gmx.de>
- * All rights reserved.
- *
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions, and the following disclaimer,
- *    without modification.
- * 2. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License ("GPL").
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * HP PARISC soft power switch driver
  *
+ * Copyright (c) 2001-2023 Helge Deller <deller@gmx.de>
  *
  *  HINT:
  *  Support of the soft power switch button may be enabled or disabled at
  *  runtime through the "/proc/sys/kernel/power" procfs entry.
- */ 
+ */
 
 #include <linux/module.h>
 #include <linux/init.h>
@@ -62,12 +37,12 @@
 
 #define MFCPU_X(rDiagReg, t_ch, t_th, code) \
 	(DIAG_CODE(code) + ((rDiagReg)<<21) + ((t_ch)<<16) + ((t_th)<<0) )
-	
+
 #define MTCPU(dr, gr)		MFCPU_X(dr, gr,  0, 0x12)       /* move value of gr to dr[dr] */
 #define MFCPU_C(dr, gr)		MFCPU_X(dr, gr,  0, 0x30)	/* for dr0 and dr8 only ! */
 #define MFCPU_T(dr, gr)		MFCPU_X(dr,  0, gr, 0xa0)	/* all dr except dr0 and dr8 */
-	
-#define __getDIAG(dr) ( { 			\
+
+#define __getDIAG(dr) ( {			\
         register unsigned long __res asm("r28");\
 	 __asm__ __volatile__ (			\
 		".word %1" : "=&r" (__res) : "i" (MFCPU_T(dr,28) ) \
@@ -85,7 +60,7 @@ static void process_shutdown(void)
 		printk(KERN_ALERT KTHREAD_NAME ": Shutdown requested...\n");
 
 	shutdown_timer++;
-	
+
 	/* wait until the button was pressed for 1 second */
 	if (shutdown_timer == (POWERSWITCH_DOWN_SEC*POWERSWITCH_POLL_PER_SEC)) {
 		static const char msg[] = "Shutting down...";
@@ -135,7 +110,7 @@ static int kpowerswd(void *param)
 			button_not_pressed = (gsc_readl(soft_power_reg) & 0x1);
 		} else {
 			/*
-			 * On gecko style machines (e.g. 712/xx and 715/xx) 
+			 * On gecko style machines (e.g. 712/xx and 715/xx)
 			 * the power switch status is stored in Bit 0 ("the highest bit")
 			 * of CPU diagnose register 25.
 			 * Warning: Some machines never reset the DIAG flag, even if
@@ -161,7 +136,7 @@ static int kpowerswd(void *param)
 
 
 /*
- * powerfail interruption handler (irq IRQ_FROM_REGION(CPU_IRQ_REGION)+2) 
+ * powerfail interruption handler (irq IRQ_FROM_REGION(CPU_IRQ_REGION)+2)
  */
 #if 0
 static void powerfail_interrupt(int code, void *x)
@@ -197,6 +172,14 @@ static struct notifier_block parisc_panic_block = {
 	.priority	= INT_MAX,
 };
 
+/* qemu soft power-off function */
+static int qemu_power_off(struct sys_off_data *data)
+{
+	/* this turns the system off via SeaBIOS */
+	*(int *)data->cb_data = 0;
+	pdc_soft_power_button(1);
+	return NOTIFY_DONE;
+}
 
 static int __init power_init(void)
 {
@@ -214,19 +197,25 @@ static int __init power_init(void)
 		ret = pdc_soft_power_button(1);
 	if (ret != PDC_OK)
 		soft_power_reg = -1UL;
-	
+
 	switch (soft_power_reg) {
 	case 0:		printk(KERN_INFO DRIVER_NAME ": Gecko-style soft power switch enabled.\n");
 			break;
-			
+
 	case -1UL:	printk(KERN_INFO DRIVER_NAME ": Soft power switch support not available.\n");
 			return -ENODEV;
-	
+
 	default:	printk(KERN_INFO DRIVER_NAME ": Soft power switch at 0x%08lx enabled.\n",
 				soft_power_reg);
 	}
 
-	power_task = kthread_run(kpowerswd, (void*)soft_power_reg, KTHREAD_NAME);
+	power_task = NULL;
+	if (running_on_qemu && soft_power_reg)
+		register_sys_off_handler(SYS_OFF_MODE_POWER_OFF, SYS_OFF_PRIO_DEFAULT,
+					qemu_power_off, (void *)soft_power_reg);
+	else
+		power_task = kthread_run(kpowerswd, (void*)soft_power_reg,
+					KTHREAD_NAME);
 	if (IS_ERR(power_task)) {
 		printk(KERN_ERR DRIVER_NAME ": thread creation failed.  Driver not loaded.\n");
 		pdc_soft_power_button(0);