From a348eab32776ba1b1164eeb16f9fd5a3f646dde3 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Tue, 4 May 2021 14:43:04 +0200
Subject: parisc: make parisc_acctyp() available outside of faults.c

When adding kfence support, we need to tell kfence_handle_page_fault()
if the interrupted assembler statement is a read or write operation.

Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/include/asm/traps.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'arch/parisc/include')

diff --git a/arch/parisc/include/asm/traps.h b/arch/parisc/include/asm/traps.h
index 8ecc1f0c0483..34619f010c63 100644
--- a/arch/parisc/include/asm/traps.h
+++ b/arch/parisc/include/asm/traps.h
@@ -14,6 +14,7 @@ void parisc_terminate(char *msg, struct pt_regs *regs,
 void die_if_kernel(char *str, struct pt_regs *regs, long err);
 
 /* mm/fault.c */
+unsigned long parisc_acctyp(unsigned long code, unsigned int inst);
 const char *trap_name(unsigned long code);
 void do_page_fault(struct pt_regs *regs, unsigned long code,
 		unsigned long address);
-- 
cgit v1.2.3-71-gd317


From ec5c115050f59114e216212837f1c1ebc54bdfc9 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Sat, 9 Oct 2021 22:21:49 +0200
Subject: parisc: Add KFENCE support

Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/Kconfig              |  5 +++--
 arch/parisc/include/asm/kfence.h | 44 ++++++++++++++++++++++++++++++++++++++++
 arch/parisc/kernel/traps.c       |  5 +++++
 3 files changed, 52 insertions(+), 2 deletions(-)
 create mode 100644 arch/parisc/include/asm/kfence.h

(limited to 'arch/parisc/include')

diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index aee25beb2d00..906187a412ec 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -48,6 +48,7 @@ config PARISC
 	select HAVE_ARCH_HASH
 	select HAVE_ARCH_JUMP_LABEL
 	select HAVE_ARCH_JUMP_LABEL_RELATIVE
+	select HAVE_ARCH_KFENCE
 	select HAVE_ARCH_SECCOMP_FILTER
 	select HAVE_ARCH_TRACEHOOK
 	select HAVE_REGS_AND_STACK_ACCESS_API
@@ -254,11 +255,11 @@ config PARISC_PAGE_SIZE_4KB
 
 config PARISC_PAGE_SIZE_16KB
 	bool "16KB"
-	depends on PA8X00 && BROKEN
+	depends on PA8X00 && BROKEN && !KFENCE
 
 config PARISC_PAGE_SIZE_64KB
 	bool "64KB"
-	depends on PA8X00 && BROKEN
+	depends on PA8X00 && BROKEN && !KFENCE
 
 endchoice
 
diff --git a/arch/parisc/include/asm/kfence.h b/arch/parisc/include/asm/kfence.h
new file mode 100644
index 000000000000..6259e5ac1fea
--- /dev/null
+++ b/arch/parisc/include/asm/kfence.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * PA-RISC KFENCE support.
+ *
+ * Copyright (C) 2021, Helge Deller <deller@gmx.de>
+ */
+
+#ifndef _ASM_PARISC_KFENCE_H
+#define _ASM_PARISC_KFENCE_H
+
+#include <linux/kfence.h>
+
+#include <asm/pgtable.h>
+#include <asm/tlbflush.h>
+
+static inline bool arch_kfence_init_pool(void)
+{
+	return true;
+}
+
+/* Protect the given page and flush TLB. */
+static inline bool kfence_protect_page(unsigned long addr, bool protect)
+{
+	pte_t *pte = virt_to_kpte(addr);
+
+	if (WARN_ON(!pte))
+		return false;
+
+	/*
+	 * We need to avoid IPIs, as we may get KFENCE allocations or faults
+	 * with interrupts disabled.
+	 */
+
+	if (protect)
+		set_pte(pte, __pte(pte_val(*pte) & ~_PAGE_PRESENT));
+	else
+		set_pte(pte, __pte(pte_val(*pte) | _PAGE_PRESENT));
+
+	flush_tlb_kernel_range(addr, addr + PAGE_SIZE);
+
+	return true;
+}
+
+#endif /* _ASM_PARISC_KFENCE_H */
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index 747c328fb886..524781eae4dd 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -30,6 +30,7 @@
 #include <linux/ratelimit.h>
 #include <linux/uaccess.h>
 #include <linux/kdebug.h>
+#include <linux/kfence.h>
 
 #include <asm/assembly.h>
 #include <asm/io.h>
@@ -787,6 +788,10 @@ void notrace handle_interruption(int code, struct pt_regs *regs)
 		/* Clean up and return if in exception table. */
 		if (fixup_exception(regs))
 			return;
+		/* Clean up and return if handled by kfence. */
+		if (kfence_handle_page_fault(fault_address,
+			parisc_acctyp(code, regs->iir) == VM_WRITE, regs))
+			return;
 		pdc_chassis_send_status(PDC_CHASSIS_DIRECT_PANIC);
 		parisc_terminate("Kernel Fault", regs, code, fault_address);
 	    }
-- 
cgit v1.2.3-71-gd317


From 9f6cfef1d040592e792fa3afd7ce97029ec3a0e6 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Mon, 4 Oct 2021 23:36:50 +0200
Subject: parisc: Define FRAME_ALIGN and PRIV_USER/PRIV_KERNEL in assembly.h

Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/include/asm/assembly.h | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'arch/parisc/include')

diff --git a/arch/parisc/include/asm/assembly.h b/arch/parisc/include/asm/assembly.h
index a39250cb7dfc..365c2853eb7a 100644
--- a/arch/parisc/include/asm/assembly.h
+++ b/arch/parisc/include/asm/assembly.h
@@ -42,6 +42,9 @@
 #define ASM_ULONG_INSN	.word
 #endif
 
+/* Frame alignment for 32- and 64-bit */
+#define FRAME_ALIGN     64
+
 #define CALLEE_SAVE_FRAME_SIZE (CALLEE_REG_FRAME_SIZE + CALLEE_FLOAT_FRAME_SIZE)
 
 #ifdef CONFIG_PA20
@@ -58,6 +61,10 @@
 #define PA_ASM_LEVEL	1.1
 #endif
 
+/* Privilege level field in the rightmost two bits of the IA queues */
+#define PRIV_USER	3
+#define PRIV_KERNEL	0
+
 #ifdef __ASSEMBLY__
 
 #ifdef CONFIG_64BIT
-- 
cgit v1.2.3-71-gd317


From b7d8c16a58f8e843f1db6dd08aa0d72683b336c1 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Mon, 4 Oct 2021 23:40:48 +0200
Subject: parisc: Allocate task struct with stack frame alignment

We will put the stack directly behind the task struct, so
make sure that we allocate it with an alignment of 64 bytes.

Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/include/asm/processor.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'arch/parisc/include')

diff --git a/arch/parisc/include/asm/processor.h b/arch/parisc/include/asm/processor.h
index eeb7da064289..290471ef5bac 100644
--- a/arch/parisc/include/asm/processor.h
+++ b/arch/parisc/include/asm/processor.h
@@ -12,6 +12,7 @@
 #ifndef __ASSEMBLY__
 #include <linux/threads.h>
 
+#include <asm/assembly.h>
 #include <asm/prefetch.h>
 #include <asm/hardware.h>
 #include <asm/pdc.h>
@@ -101,7 +102,7 @@ DECLARE_PER_CPU(struct cpuinfo_parisc, cpu_data);
 
 #define CPU_HVERSION ((boot_cpu_data.hversion >> 4) & 0x0FFF)
 
-#define ARCH_MIN_TASKALIGN	8
+#define ARCH_MIN_TASKALIGN	FRAME_ALIGN
 
 struct thread_struct {
 	struct pt_regs regs;
-- 
cgit v1.2.3-71-gd317


From b5f73da500c61ad226510643222070b0ea4cf9d6 Mon Sep 17 00:00:00 2001
From: Sven Schnelle <svens@stackframe.org>
Date: Thu, 14 Oct 2021 21:49:13 +0200
Subject: parisc: move virt_map macro to assembly.h

This macro will also be used by the TOC code, so move it
into asm/assembly.h to avoid duplication.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/include/asm/assembly.h | 25 +++++++++++++++++++++++++
 arch/parisc/kernel/entry.S         | 24 ------------------------
 2 files changed, 25 insertions(+), 24 deletions(-)

(limited to 'arch/parisc/include')

diff --git a/arch/parisc/include/asm/assembly.h b/arch/parisc/include/asm/assembly.h
index 365c2853eb7a..7085df079702 100644
--- a/arch/parisc/include/asm/assembly.h
+++ b/arch/parisc/include/asm/assembly.h
@@ -78,6 +78,7 @@
 #include <asm/types.h>
 
 #include <asm/asmregs.h>
+#include <asm/psw.h>
 
 	sp	=	30
 	gp	=	27
@@ -504,6 +505,30 @@
 	nop	/* 7 */
 	.endm
 
+	/* Switch to virtual mapping, trashing only %r1 */
+	.macro  virt_map
+	/* pcxt_ssm_bug */
+	rsm	PSW_SM_I, %r0		/* barrier for "Relied upon Translation */
+	mtsp	%r0, %sr4
+	mtsp	%r0, %sr5
+	mtsp	%r0, %sr6
+	tovirt_r1 %r29
+	load32	KERNEL_PSW, %r1
+
+	rsm     PSW_SM_QUIET,%r0	/* second "heavy weight" ctl op */
+	mtctl	%r0, %cr17		/* Clear IIASQ tail */
+	mtctl	%r0, %cr17		/* Clear IIASQ head */
+	mtctl	%r1, %ipsw
+	load32	4f, %r1
+	mtctl	%r1, %cr18		/* Set IIAOQ tail */
+	ldo	4(%r1), %r1
+	mtctl	%r1, %cr18		/* Set IIAOQ head */
+	rfir
+	nop
+4:
+	.endm
+
+
 	/*
 	 * ASM_EXCEPTIONTABLE_ENTRY
 	 *
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index 852bf7334fb5..b7108d5da644 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -51,30 +51,6 @@
 	extrd,u \spc,(64 - (SPACEID_SHIFT)),32,\prot
 	.endm
 #endif
-
-	/* Switch to virtual mapping, trashing only %r1 */
-	.macro  virt_map
-	/* pcxt_ssm_bug */
-	rsm	PSW_SM_I, %r0	/* barrier for "Relied upon Translation */
-	mtsp	%r0, %sr4
-	mtsp	%r0, %sr5
-	mtsp	%r0, %sr6
-	tovirt_r1 %r29
-	load32	KERNEL_PSW, %r1
-
-	rsm     PSW_SM_QUIET,%r0	/* second "heavy weight" ctl op */
-	mtctl	%r0, %cr17	/* Clear IIASQ tail */
-	mtctl	%r0, %cr17	/* Clear IIASQ head */
-	mtctl	%r1, %ipsw
-	load32	4f, %r1
-	mtctl	%r1, %cr18	/* Set IIAOQ tail */
-	ldo	4(%r1), %r1
-	mtctl	%r1, %cr18	/* Set IIAOQ head */
-	rfir
-	nop
-4:
-	.endm
-
 	/*
 	 * The "get_stack" macros are responsible for determining the
 	 * kernel stack value.
-- 
cgit v1.2.3-71-gd317


From d9e203366936e9df752468d27fef039b38d968e1 Mon Sep 17 00:00:00 2001
From: Sven Schnelle <svens@stackframe.org>
Date: Thu, 14 Oct 2021 21:49:14 +0200
Subject: parisc: add PIM TOC data structures

These data structures describe the TOC data we get from firmware
when issuing a PDC_PIM_TOC request.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/include/uapi/asm/pdc.h | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'arch/parisc/include')

diff --git a/arch/parisc/include/uapi/asm/pdc.h b/arch/parisc/include/uapi/asm/pdc.h
index 15211723ebf5..ad51df8ba952 100644
--- a/arch/parisc/include/uapi/asm/pdc.h
+++ b/arch/parisc/include/uapi/asm/pdc.h
@@ -689,6 +689,28 @@ struct pdc_hpmc_pim_20 { /* PDC_PIM */
 	unsigned long long fr[32];
 };
 
+struct pdc_toc_pim_11 {
+	unsigned int gr[32];
+	unsigned int cr[32];
+	unsigned int sr[8];
+	unsigned int iasq_back;
+	unsigned int iaoq_back;
+	unsigned int check_type;
+	unsigned int hversion;
+	unsigned int cpu_state;
+};
+
+struct pdc_toc_pim_20 {
+	unsigned long long gr[32];
+	unsigned long long cr[32];
+	unsigned long long sr[8];
+	unsigned long long iasq_back;
+	unsigned long long iaoq_back;
+	unsigned int check_type;
+	unsigned int hversion;
+	unsigned int cpu_state;
+};
+
 #endif /* !defined(__ASSEMBLY__) */
 
 #endif /* _UAPI_PARISC_PDC_H */
-- 
cgit v1.2.3-71-gd317


From ecac70366dce374014f070b7eacd5865a9ab3b13 Mon Sep 17 00:00:00 2001
From: Sven Schnelle <svens@stackframe.org>
Date: Thu, 14 Oct 2021 21:49:15 +0200
Subject: parisc/firmware: add functions to retrieve TOC data

Add functions to retrieve TOC data from firmware both
for 1.1 and 2.0 PDC.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/include/asm/pdc.h |  2 ++
 arch/parisc/kernel/firmware.c | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

(limited to 'arch/parisc/include')

diff --git a/arch/parisc/include/asm/pdc.h b/arch/parisc/include/asm/pdc.h
index b388d8176588..18b957a8630d 100644
--- a/arch/parisc/include/asm/pdc.h
+++ b/arch/parisc/include/asm/pdc.h
@@ -51,6 +51,8 @@ int pdc_spaceid_bits(unsigned long *space_bits);
 int pdc_btlb_info(struct pdc_btlb_info *btlb);
 int pdc_mem_map_hpa(struct pdc_memory_map *r_addr, struct pdc_module_path *mod_path);
 #endif /* !CONFIG_PA20 */
+int pdc_pim_toc11(struct pdc_toc_pim_11 *ret);
+int pdc_pim_toc20(struct pdc_toc_pim_20 *ret);
 int pdc_lan_station_id(char *lan_addr, unsigned long net_hpa);
 
 int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count);
diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c
index 7034227dbdf3..3370e347dde3 100644
--- a/arch/parisc/kernel/firmware.c
+++ b/arch/parisc/kernel/firmware.c
@@ -1061,6 +1061,38 @@ int pdc_mem_pdt_read_entries(struct pdc_mem_read_pdt *pret,
 	return retval;
 }
 
+/**
+ * pdc_pim_toc11 - Fetch TOC PIM 1.1 data from firmware.
+ * @ret: pointer to return buffer
+ */
+int pdc_pim_toc11(struct pdc_toc_pim_11 *ret)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_PIM, PDC_PIM_TOC, __pa(pdc_result),
+			      __pa(ret), sizeof(*ret));
+	spin_unlock_irqrestore(&pdc_lock, flags);
+	return retval;
+}
+
+/**
+ * pdc_pim_toc20 - Fetch TOC PIM 2.0 data from firmware.
+ * @ret: pointer to return buffer
+ */
+int pdc_pim_toc20(struct pdc_toc_pim_20 *ret)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_PIM, PDC_PIM_TOC, __pa(pdc_result),
+			      __pa(ret), sizeof(*ret));
+	spin_unlock_irqrestore(&pdc_lock, flags);
+	return retval;
+}
+
 /**
  * pdc_tod_set - Set the Time-Of-Day clock.
  * @sec: The number of seconds since epoch.
-- 
cgit v1.2.3-71-gd317


From bc294838cc3443a2fbec58f8936ad4bd0a0b3055 Mon Sep 17 00:00:00 2001
From: Sven Schnelle <svens@stackframe.org>
Date: Thu, 14 Oct 2021 21:49:16 +0200
Subject: parisc: add support for TOC (transfer of control)

Almost all PA-RISC machines have either a button that
is labeled with 'TOC' or a BMC function to trigger a TOC.
TOC is a non-maskable interrupt that is sent to the processor.
This can be used for diagnostic purposes like obtaining a
stack trace/register dump or to enter KDB/KGDB.

As an example, on my c8000, TOC can be used with:

CONFIG_KGDB=y
CONFIG_KGDB_KDB=y

and the 'kgdboc=ttyS0,115200' appended to the command line.

Press ^[( on serial console, which will enter the BMC command line,
and enter 'TOC s':

root@(none):/# (
cli>TOC s
Sending TOC/INIT.
<Cpu3> 2800035d03e00000  0000000040c21ac8  CC_ERR_CHECK_TOC
<Cpu0> 2800035d00e00000  0000000040c21ad0  CC_ERR_CHECK_TOC
<Cpu2> 2800035d02e00000  0000000040c21ac8  CC_ERR_CHECK_TOC
<Cpu1> 2800035d01e00000  0000000040c21ad0  CC_ERR_CHECK_TOC
<Cpu3> 37000f7303e00000  2000000000000000  CC_ERR_CPU_CHECK_SUMMARY
<Cpu0> 37000f7300e00000  2000000000000000  CC_ERR_CPU_CHECK_SUMMARY
<Cpu2> 37000f7302e00000  2000000000000000  CC_ERR_CPU_CHECK_SUMMARY
<Cpu1> 37000f7301e00000  2000000000000000  CC_ERR_CPU_CHECK_SUMMARY
<Cpu3> 4300100803e00000  c0000000001d26cc  CC_MC_BR_TO_OS_TOC
<Cpu0> 4300100800e00000  c0000000001d26cc  CC_MC_BR_TO_OS_TOC
<Cpu2> 4300100802e00000  c0000000001d26cc  CC_MC_BR_TO_OS_TOC
<Cpu1> 4300100801e00000  c0000000001d26cc  CC_MC_BR_TO_OS_TOC

Entering kdb (current=0x00000000411cef80, pid 0) on processor 0 due to NonMaskable Interrupt @ 0x40c21ad0
[0]kdb>

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/Kconfig                 |  14 +++++
 arch/parisc/include/asm/processor.h |   4 ++
 arch/parisc/include/uapi/asm/pdc.h  |   6 +-
 arch/parisc/kernel/Makefile         |   1 +
 arch/parisc/kernel/toc.c            | 111 ++++++++++++++++++++++++++++++++++++
 arch/parisc/kernel/toc_asm.S        |  88 ++++++++++++++++++++++++++++
 6 files changed, 222 insertions(+), 2 deletions(-)
 create mode 100644 arch/parisc/kernel/toc.c
 create mode 100644 arch/parisc/kernel/toc_asm.S

(limited to 'arch/parisc/include')

diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 906187a412ec..3296fcb90019 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -291,6 +291,20 @@ config SMP
 
 	  If you don't know what to do here, say N.
 
+config TOC
+	bool "Support TOC switch"
+	default y if 64BIT || !SMP
+	help
+	  Most PA-RISC machines have either a switch at the back of the machine
+	  or a command in BMC to trigger a TOC interrupt. If you say Y here a
+	  handler will be installed which will either show a backtrace on all
+	  CPUs, or enter a possible configured debugger like kgdb/kdb.
+
+	  Note that with this option enabled, the kernel will use an additional 16KB
+	  per possible CPU as a special stack for the TOC handler.
+
+	  If you don't want to debug the Kernel, say N.
+
 config PARISC_CPU_TOPOLOGY
 	bool "Support cpu topology definition"
 	depends on SMP
diff --git a/arch/parisc/include/asm/processor.h b/arch/parisc/include/asm/processor.h
index 290471ef5bac..f57944d3284b 100644
--- a/arch/parisc/include/asm/processor.h
+++ b/arch/parisc/include/asm/processor.h
@@ -295,6 +295,10 @@ extern int _parisc_requires_coherency;
 
 extern int running_on_qemu;
 
+extern void toc_handler(void);
+extern unsigned int toc_handler_size;
+extern unsigned int toc_handler_csum;
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* __ASM_PARISC_PROCESSOR_H */
diff --git a/arch/parisc/include/uapi/asm/pdc.h b/arch/parisc/include/uapi/asm/pdc.h
index ad51df8ba952..acc633c15722 100644
--- a/arch/parisc/include/uapi/asm/pdc.h
+++ b/arch/parisc/include/uapi/asm/pdc.h
@@ -398,8 +398,10 @@ struct zeropage {
 	/* int	(*vec_rendz)(void); */
 	unsigned int vec_rendz;
 	int	vec_pow_fail_flen;
-	int	vec_pad[10];		
-	
+	int	vec_pad0[3];
+	unsigned int vec_toc_hi;
+	int	vec_pad1[6];
+
 	/* [0x040] reserved processor dependent */
 	int	pad0[112];
 
diff --git a/arch/parisc/kernel/Makefile b/arch/parisc/kernel/Makefile
index 068d90950d93..ed0b87908d71 100644
--- a/arch/parisc/kernel/Makefile
+++ b/arch/parisc/kernel/Makefile
@@ -39,3 +39,4 @@ obj-$(CONFIG_KGDB)			+= kgdb.o
 obj-$(CONFIG_KPROBES)			+= kprobes.o
 obj-$(CONFIG_KEXEC_CORE)		+= kexec.o relocate_kernel.o
 obj-$(CONFIG_KEXEC_FILE)		+= kexec_file.o
+obj-$(CONFIG_TOC)			+= toc.o toc_asm.o
diff --git a/arch/parisc/kernel/toc.c b/arch/parisc/kernel/toc.c
new file mode 100644
index 000000000000..18327611cf8f
--- /dev/null
+++ b/arch/parisc/kernel/toc.c
@@ -0,0 +1,111 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/kernel.h>
+#include <linux/kgdb.h>
+#include <linux/printk.h>
+#include <linux/sched/debug.h>
+#include <linux/delay.h>
+#include <linux/reboot.h>
+
+#include <asm/pdc.h>
+#include <asm/pdc_chassis.h>
+
+unsigned int __aligned(16) toc_lock = 1;
+
+static void toc20_to_pt_regs(struct pt_regs *regs, struct pdc_toc_pim_20 *toc)
+{
+	int i;
+
+	regs->gr[0] = (unsigned long)toc->cr[22];
+
+	for (i = 1; i < 32; i++)
+		regs->gr[i] = (unsigned long)toc->gr[i];
+
+	for (i = 0; i < 8; i++)
+		regs->sr[i] = (unsigned long)toc->sr[i];
+
+	regs->iasq[0] = (unsigned long)toc->cr[17];
+	regs->iasq[1] = (unsigned long)toc->iasq_back;
+	regs->iaoq[0] = (unsigned long)toc->cr[18];
+	regs->iaoq[1] = (unsigned long)toc->iaoq_back;
+
+	regs->sar = (unsigned long)toc->cr[11];
+	regs->iir = (unsigned long)toc->cr[19];
+	regs->isr = (unsigned long)toc->cr[20];
+	regs->ior = (unsigned long)toc->cr[21];
+}
+
+static void toc11_to_pt_regs(struct pt_regs *regs, struct pdc_toc_pim_11 *toc)
+{
+	int i;
+
+	regs->gr[0] = toc->cr[22];
+
+	for (i = 1; i < 32; i++)
+		regs->gr[i] = toc->gr[i];
+
+	for (i = 0; i < 8; i++)
+		regs->sr[i] = toc->sr[i];
+
+	regs->iasq[0] = toc->cr[17];
+	regs->iasq[1] = toc->iasq_back;
+	regs->iaoq[0] = toc->cr[18];
+	regs->iaoq[1] = toc->iaoq_back;
+
+	regs->sar  = toc->cr[11];
+	regs->iir  = toc->cr[19];
+	regs->isr  = toc->cr[20];
+	regs->ior  = toc->cr[21];
+}
+
+void notrace __noreturn __cold toc_intr(struct pt_regs *regs)
+{
+	struct pdc_toc_pim_20 pim_data20;
+	struct pdc_toc_pim_11 pim_data11;
+
+	nmi_enter();
+
+	if (boot_cpu_data.cpu_type >= pcxu) {
+		if (pdc_pim_toc20(&pim_data20))
+			panic("Failed to get PIM data");
+		toc20_to_pt_regs(regs, &pim_data20);
+	} else {
+		if (pdc_pim_toc11(&pim_data11))
+			panic("Failed to get PIM data");
+		toc11_to_pt_regs(regs, &pim_data11);
+	}
+
+#ifdef CONFIG_KGDB
+	if (atomic_read(&kgdb_active) != -1)
+		kgdb_nmicallback(raw_smp_processor_id(), regs);
+	kgdb_handle_exception(9, SIGTRAP, 0, regs);
+#endif
+	show_regs(regs);
+
+	/* give other CPUs time to show their backtrace */
+	mdelay(2000);
+	machine_restart("TOC");
+
+	/* should never reach this */
+	panic("TOC");
+}
+
+static __init int setup_toc(void)
+{
+	unsigned int csum = 0;
+	unsigned long toc_code = (unsigned long)dereference_function_descriptor(toc_handler);
+	int i;
+
+	PAGE0->vec_toc = __pa(toc_code) & 0xffffffff;
+#ifdef CONFIG_64BIT
+	PAGE0->vec_toc_hi = __pa(toc_code) >> 32;
+#endif
+	PAGE0->vec_toclen = toc_handler_size;
+
+	for (i = 0; i < toc_handler_size/4; i++)
+		csum += ((u32 *)toc_code)[i];
+	toc_handler_csum = -csum;
+	pr_info("TOC handler registered\n");
+	return 0;
+}
+early_initcall(setup_toc);
diff --git a/arch/parisc/kernel/toc_asm.S b/arch/parisc/kernel/toc_asm.S
new file mode 100644
index 000000000000..e94ba8044190
--- /dev/null
+++ b/arch/parisc/kernel/toc_asm.S
@@ -0,0 +1,88 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/* TOC (Transfer of Control) handler. */
+
+	.level 1.1
+
+#include <asm/assembly.h>
+#include <asm/psw.h>
+#include <linux/threads.h>
+#include <linux/linkage.h>
+
+	.text
+	.import toc_intr,code
+	.import toc_lock,data
+	.align 16
+ENTRY_CFI(toc_handler)
+	/*
+	 * synchronize CPUs and obtain offset
+	 * for stack setup.
+	 */
+	load32		PA(toc_lock),%r1
+0:	ldcw,co		0(%r1),%r2
+	cmpib,=		0,%r2,0b
+	nop
+	addi		1,%r2,%r4
+	stw		%r4,0(%r1)
+	addi		-1,%r2,%r4
+
+	load32	PA(toc_stack),%sp
+	/*
+	 * deposit CPU number into stack address,
+	 * so every CPU will have its own stack.
+	 */
+	SHLREG	%r4,14,%r4
+	add	%r4,%sp,%sp
+
+	/*
+	 * setup pt_regs on stack and save the
+	 * floating point registers. PIM_TOC doesn't
+	 * save fp registers, so we're doing it here.
+	 */
+	copy	%sp,%arg0
+	ldo	PT_SZ_ALGN(%sp), %sp
+
+	/* clear pt_regs */
+	copy	%arg0,%r1
+0:	cmpb,<<,n %r1,%sp,0b
+	stw,ma	%r0,4(%r1)
+
+	ldo	PT_FR0(%arg0),%r25
+	save_fp	%r25
+
+	/* go virtual */
+	load32	PA(swapper_pg_dir),%r4
+	mtctl	%r4,%cr24
+	mtctl	%r4,%cr25
+
+	/* Clear sr4-sr7 */
+	mtsp	%r0, %sr4
+	mtsp	%r0, %sr5
+	mtsp	%r0, %sr6
+	mtsp	%r0, %sr7
+
+	tovirt_r1 %sp
+	tovirt_r1 %arg0
+	virt_map
+
+	loadgp
+
+#ifdef CONFIG_64BIT
+	ldo	-16(%sp),%r29
+#endif
+	load32	toc_intr,%r1
+	be	0(%sr7,%r1)
+	nop
+ENDPROC_CFI(toc_handler)
+
+	/*
+	 * keep this checksum here, as it is part of the toc_handler
+	 * spanned by toc_handler_size (all words in toc_handler are
+	 * added in PDC and the sum must equal to zero.
+	 */
+SYM_DATA(toc_handler_csum, .long 0)
+SYM_DATA(toc_handler_size, .long . - toc_handler)
+
+	__PAGE_ALIGNED_BSS
+	.align 64
+SYM_DATA(toc_stack, .block 16384*NR_CPUS)
-- 
cgit v1.2.3-71-gd317


From 2214c0e77259b420402e279e9ab4277ef320d371 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Fri, 15 Oct 2021 10:41:03 +0200
Subject: parisc: Move thread_info into task struct

This implements the CONFIG_THREAD_INFO_IN_TASK option.

With this change:
- before thread_info was part of the stack and located at the beginning of the stack
- now the thread_info struct is moved and located inside the task_struct structure
- the stack is allocated and handled like the major other platforms
- drop the cpu field of thread_info and use instead the one in task_struct

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Sven Schnelle <svens@stackframe.org>
---
 .../core/thread-info-in-task/arch-support.txt      |  2 +-
 arch/parisc/Kconfig                                |  1 +
 arch/parisc/include/asm/current.h                  | 19 ++++++++
 arch/parisc/include/asm/processor.h                |  2 -
 arch/parisc/include/asm/smp.h                      | 19 +++++++-
 arch/parisc/include/asm/thread_info.h              |  7 ---
 arch/parisc/kernel/asm-offsets.c                   | 21 ++++-----
 arch/parisc/kernel/entry.S                         | 50 ++++++++++------------
 arch/parisc/kernel/head.S                          | 40 ++++++++---------
 arch/parisc/kernel/irq.c                           |  6 +--
 arch/parisc/kernel/process.c                       |  4 +-
 arch/parisc/kernel/smp.c                           |  2 +-
 arch/parisc/kernel/syscall.S                       | 22 ++++------
 arch/parisc/kernel/traps.c                         |  2 +-
 arch/parisc/kernel/unwind.c                        | 10 ++---
 15 files changed, 106 insertions(+), 101 deletions(-)
 create mode 100644 arch/parisc/include/asm/current.h

(limited to 'arch/parisc/include')

diff --git a/Documentation/features/core/thread-info-in-task/arch-support.txt b/Documentation/features/core/thread-info-in-task/arch-support.txt
index 9f0259bbd7df..3361e86b0958 100644
--- a/Documentation/features/core/thread-info-in-task/arch-support.txt
+++ b/Documentation/features/core/thread-info-in-task/arch-support.txt
@@ -20,7 +20,7 @@
     |       nds32: |  ok  |
     |       nios2: | TODO |
     |    openrisc: | TODO |
-    |      parisc: | TODO |
+    |      parisc: |  ok  |
     |     powerpc: |  ok  |
     |       riscv: |  ok  |
     |        s390: |  ok  |
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 3296fcb90019..b2188da09c73 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -56,6 +56,7 @@ config PARISC
 	select HAVE_UNSTABLE_SCHED_CLOCK if SMP
 	select LEGACY_TIMER_TICK
 	select CPU_NO_EFFICIENT_FFS
+	select THREAD_INFO_IN_TASK
 	select NEED_DMA_MAP_STATE
 	select NEED_SG_DMA_LENGTH
 	select HAVE_ARCH_KGDB
diff --git a/arch/parisc/include/asm/current.h b/arch/parisc/include/asm/current.h
new file mode 100644
index 000000000000..568b739e42af
--- /dev/null
+++ b/arch/parisc/include/asm/current.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_PARISC_CURRENT_H
+#define _ASM_PARISC_CURRENT_H
+
+#include <asm/special_insns.h>
+
+#ifndef __ASSEMBLY__
+struct task_struct;
+
+static __always_inline struct task_struct *get_current(void)
+{
+	return (struct task_struct *) mfctl(30);
+}
+
+#define current get_current()
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_PARISC_CURRENT_H */
diff --git a/arch/parisc/include/asm/processor.h b/arch/parisc/include/asm/processor.h
index f57944d3284b..0d567774f506 100644
--- a/arch/parisc/include/asm/processor.h
+++ b/arch/parisc/include/asm/processor.h
@@ -102,8 +102,6 @@ DECLARE_PER_CPU(struct cpuinfo_parisc, cpu_data);
 
 #define CPU_HVERSION ((boot_cpu_data.hversion >> 4) & 0x0FFF)
 
-#define ARCH_MIN_TASKALIGN	FRAME_ALIGN
-
 struct thread_struct {
 	struct pt_regs regs;
 	unsigned long  task_size;
diff --git a/arch/parisc/include/asm/smp.h b/arch/parisc/include/asm/smp.h
index b9a18db4b05a..16d41127500e 100644
--- a/arch/parisc/include/asm/smp.h
+++ b/arch/parisc/include/asm/smp.h
@@ -34,8 +34,23 @@ extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
 
 #endif /* !ASSEMBLY */
 
-#define raw_smp_processor_id()	(current_thread_info()->cpu)
-
+/*
+ * This is particularly ugly: it appears we can't actually get the definition
+ * of task_struct here, but we need access to the CPU this task is running on.
+ * Instead of using task_struct we're using TASK_CPU which is extracted from
+ * asm-offsets.h by kbuild to get the current processor ID.
+ *
+ * This also needs to be safeguarded when building asm-offsets.s because at
+ * that time TASK_CPU is not defined yet. It could have been guarded by
+ * TASK_CPU itself, but we want the build to fail if TASK_CPU is missing
+ * when building something else than asm-offsets.s
+ */
+#ifdef GENERATING_ASM_OFFSETS
+#define raw_smp_processor_id()		(0)
+#else
+#include <asm/asm-offsets.h>
+#define raw_smp_processor_id()		(*(unsigned int *)((void *)current + TASK_CPU))
+#endif
 #else /* CONFIG_SMP */
 
 static inline void smp_send_all_nop(void) { return; }
diff --git a/arch/parisc/include/asm/thread_info.h b/arch/parisc/include/asm/thread_info.h
index 00ad50fef769..4617303e0620 100644
--- a/arch/parisc/include/asm/thread_info.h
+++ b/arch/parisc/include/asm/thread_info.h
@@ -9,23 +9,16 @@
 #include <asm/special_insns.h>
 
 struct thread_info {
-	struct task_struct *task;	/* main task structure */
 	unsigned long flags;		/* thread_info flags (see TIF_*) */
-	__u32 cpu;			/* current CPU */
 	int preempt_count;		/* 0=premptable, <0=BUG; will also serve as bh-counter */
 };
 
 #define INIT_THREAD_INFO(tsk)			\
 {						\
-	.task		= &tsk,			\
 	.flags		= 0,			\
-	.cpu		= 0,			\
 	.preempt_count	= INIT_PREEMPT_COUNT,	\
 }
 
-/* how to get the thread information struct from C */
-#define current_thread_info()	((struct thread_info *)mfctl(30))
-
 #endif /* !__ASSEMBLY */
 
 /* thread information allocation */
diff --git a/arch/parisc/kernel/asm-offsets.c b/arch/parisc/kernel/asm-offsets.c
index 276c67ea7fd2..5d84b0f78c2a 100644
--- a/arch/parisc/kernel/asm-offsets.c
+++ b/arch/parisc/kernel/asm-offsets.c
@@ -14,6 +14,8 @@
  *    Copyright (C) 2003 James Bottomley <jejb at parisc-linux.org>
  */
 
+#define GENERATING_ASM_OFFSETS /* asm/smp.h */
+
 #include <linux/types.h>
 #include <linux/sched.h>
 #include <linux/thread_info.h>
@@ -35,13 +37,16 @@
 
 int main(void)
 {
-	DEFINE(TASK_THREAD_INFO, offsetof(struct task_struct, stack));
-	DEFINE(TASK_FLAGS, offsetof(struct task_struct, flags));
+	DEFINE(TASK_TI_FLAGS, offsetof(struct task_struct, thread_info.flags));
 	DEFINE(TASK_SIGPENDING, offsetof(struct task_struct, pending));
 	DEFINE(TASK_PTRACE, offsetof(struct task_struct, ptrace));
 	DEFINE(TASK_MM, offsetof(struct task_struct, mm));
 	DEFINE(TASK_PERSONALITY, offsetof(struct task_struct, personality));
 	DEFINE(TASK_PID, offsetof(struct task_struct, pid));
+	DEFINE(TASK_STACK, offsetof(struct task_struct, stack));
+#ifdef CONFIG_SMP
+	DEFINE(TASK_CPU, offsetof(struct task_struct, cpu));
+#endif
 	BLANK();
 	DEFINE(TASK_REGS, offsetof(struct task_struct, thread.regs));
 	DEFINE(TASK_PT_PSW, offsetof(struct task_struct, thread.regs.gr[ 0]));
@@ -129,10 +134,6 @@ int main(void)
 	DEFINE(TASK_PT_ISR, offsetof(struct task_struct, thread.regs.isr));
 	DEFINE(TASK_PT_IOR, offsetof(struct task_struct, thread.regs.ior));
 	BLANK();
-	DEFINE(TASK_SZ, sizeof(struct task_struct));
-	/* TASK_SZ_ALGN includes space for a stack frame. */
-	DEFINE(TASK_SZ_ALGN, align_frame(sizeof(struct task_struct), FRAME_ALIGN));
-	BLANK();
 	DEFINE(PT_PSW, offsetof(struct pt_regs, gr[ 0]));
 	DEFINE(PT_GR1, offsetof(struct pt_regs, gr[ 1]));
 	DEFINE(PT_GR2, offsetof(struct pt_regs, gr[ 2]));
@@ -217,17 +218,11 @@ int main(void)
 	DEFINE(PT_IIR, offsetof(struct pt_regs, iir));
 	DEFINE(PT_ISR, offsetof(struct pt_regs, isr));
 	DEFINE(PT_IOR, offsetof(struct pt_regs, ior));
-	DEFINE(PT_SIZE, sizeof(struct pt_regs));
 	/* PT_SZ_ALGN includes space for a stack frame. */
 	DEFINE(PT_SZ_ALGN, align_frame(sizeof(struct pt_regs), FRAME_ALIGN));
 	BLANK();
-	DEFINE(TI_TASK, offsetof(struct thread_info, task));
 	DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
-	DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
-	DEFINE(TI_PRE_COUNT, offsetof(struct thread_info, preempt_count));
-	DEFINE(THREAD_SZ, sizeof(struct thread_info));
-	/* THREAD_SZ_ALGN includes space for a stack frame. */
-	DEFINE(THREAD_SZ_ALGN, align_frame(sizeof(struct thread_info), FRAME_ALIGN));
+	DEFINE(TI_PRE_COUNT, offsetof(struct task_struct, thread_info.preempt_count));
 	BLANK();
 	DEFINE(ICACHE_BASE, offsetof(struct pdc_cache_info, ic_base));
 	DEFINE(ICACHE_STRIDE, offsetof(struct pdc_cache_info, ic_stride));
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index b7108d5da644..57944d6f9ebb 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -63,8 +63,8 @@
 	 *          Need to set up a kernel stack, so call the
 	 *          get_stack_use_cr30 macro to set up a pointer
 	 *          to the pt_regs structure contained within the
-	 *          task pointer pointed to by cr30. Set the stack
-	 *          pointer to point to the end of the task structure.
+	 *          task pointer pointed to by cr30. Load the stack
+	 *          pointer from the task structure.
 	 *
 	 * Note that we use shadowed registers for temps until
 	 * we can save %r26 and %r29. %r26 is used to preserve
@@ -76,8 +76,6 @@
 	 * or handle_interruption. %r29 is used to hold a pointer
 	 * the register save area, and once again, it needs to
 	 * be a non-shadowed register so that it survives the rfir.
-	 *
-	 * N.B. TASK_SZ_ALGN and PT_SZ_ALGN include space for a stack frame.
 	 */
 
 	.macro  get_stack_use_cr30
@@ -86,12 +84,11 @@
 
 	copy	%r30, %r17
 	mfctl   %cr30, %r1
-	ldo	THREAD_SZ_ALGN(%r1), %r30
-	mtsp	%r0,%sr7
+	tophys  %r1,%r9		/* task_struct */
+	LDREG	TASK_STACK(%r9),%r30
+	ldo	PT_SZ_ALGN(%r30),%r30
+	mtsp	%r0,%sr7	/* clear sr7 after kernel stack was set! */
 	mtsp	%r16,%sr3
-	tophys  %r1,%r9
-	LDREG	TI_TASK(%r9), %r1	/* thread_info -> task_struct */
-	tophys  %r1,%r9
 	ldo     TASK_REGS(%r9),%r9
 	STREG   %r17,PT_GR30(%r9)
 	STREG   %r29,PT_GR29(%r9)
@@ -733,7 +730,7 @@ ENTRY(ret_from_kernel_thread)
 	BL	schedule_tail, %r2
 	nop
 
-	LDREG	TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30), %r1
+	mfctl	%cr30,%r1	/* task_struct */
 	LDREG	TASK_PT_GR25(%r1), %r26
 #ifdef CONFIG_64BIT
 	LDREG	TASK_PT_GR27(%r1), %r27
@@ -764,7 +761,6 @@ ENTRY_CFI(_switch_to)
 
 	STREG	%r30, TASK_PT_KSP(%r26)
 	LDREG	TASK_PT_KSP(%r25), %r30
-	LDREG	TASK_THREAD_INFO(%r25), %r25
 	bv	%r0(%r2)
 	mtctl   %r25,%cr30
 
@@ -795,8 +791,7 @@ ENDPROC_CFI(_switch_to)
 	.align	PAGE_SIZE
 
 ENTRY_CFI(syscall_exit_rfi)
-	mfctl   %cr30,%r16
-	LDREG	TI_TASK(%r16), %r16	/* thread_info -> task_struct */
+	mfctl	%cr30,%r16		/* task_struct */
 	ldo	TASK_REGS(%r16),%r16
 	/* Force iaoq to userspace, as the user has had access to our current
 	 * context via sigcontext. Also Filter the PSW for the same reason.
@@ -841,14 +836,14 @@ ENTRY_CFI(syscall_exit_rfi)
 ENTRY(intr_return)
 	/* check for reschedule */
 	mfctl   %cr30,%r1
-	LDREG   TI_FLAGS(%r1),%r19	/* sched.h: TIF_NEED_RESCHED */
+	LDREG   TASK_TI_FLAGS(%r1),%r19	/* sched.h: TIF_NEED_RESCHED */
 	bb,<,n	%r19,31-TIF_NEED_RESCHED,intr_do_resched /* forward */
 
 	.import do_notify_resume,code
 intr_check_sig:
 	/* As above */
 	mfctl   %cr30,%r1
-	LDREG	TI_FLAGS(%r1),%r19
+	LDREG	TASK_TI_FLAGS(%r1),%r19
 	ldi	(_TIF_USER_WORK_MASK & ~_TIF_NEED_RESCHED), %r20
 	and,COND(<>)	%r19, %r20, %r0
 	b,n	intr_restore	/* skip past if we've nothing to do */
@@ -1692,7 +1687,7 @@ dtlb_fault:
 
 	.macro	fork_like name
 ENTRY_CFI(sys_\name\()_wrapper)
-	LDREG	TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30), %r1
+	mfctl	%cr30,%r1
 	ldo	TASK_REGS(%r1),%r1
 	reg_save %r1
 	mfctl	%cr27, %r28
@@ -1712,7 +1707,7 @@ ENTRY(child_return)
 	BL	schedule_tail, %r2
 	nop
 finish_child_return:
-	LDREG	TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30), %r1
+	mfctl	%cr30,%r1
 	ldo	TASK_REGS(%r1),%r1	 /* get pt regs */
 
 	LDREG	PT_CR27(%r1), %r3
@@ -1723,7 +1718,7 @@ finish_child_return:
 END(child_return)
 
 ENTRY_CFI(sys_rt_sigreturn_wrapper)
-	LDREG	TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r26
+	mfctl	%cr30,%r26
 	ldo	TASK_REGS(%r26),%r26	/* get pt regs */
 	/* Don't save regs, we are going to restore them from sigcontext. */
 	STREG	%r2, -RP_OFFSET(%r30)
@@ -1740,7 +1735,7 @@ ENTRY_CFI(sys_rt_sigreturn_wrapper)
 	LDREG	-RP_OFFSET(%r30), %r2
 
 	/* FIXME: I think we need to restore a few more things here. */
-	LDREG	TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
+	mfctl	%cr30,%r1
 	ldo	TASK_REGS(%r1),%r1	/* get pt regs */
 	reg_restore %r1
 
@@ -1759,9 +1754,7 @@ ENTRY(syscall_exit)
 	 */
 
 	/* save return value now */
-
 	mfctl     %cr30, %r1
-	LDREG     TI_TASK(%r1),%r1
 	STREG     %r28,TASK_PT_GR28(%r1)
 
 	/* Seems to me that dp could be wrong here, if the syscall involved
@@ -1772,13 +1765,14 @@ ENTRY(syscall_exit)
 syscall_check_resched:
 
 	/* check for reschedule */
-
-	LDREG	TI_FLAGS-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r19	/* long */
+	mfctl	%cr30,%r19
+	LDREG	TASK_TI_FLAGS(%r19),%r19	/* long */
 	bb,<,n	%r19, 31-TIF_NEED_RESCHED, syscall_do_resched /* forward */
 
 	.import do_signal,code
 syscall_check_sig:
-	LDREG	TI_FLAGS-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r19
+	mfctl	%cr30,%r19
+	LDREG	TASK_TI_FLAGS(%r19),%r19
 	ldi	(_TIF_USER_WORK_MASK & ~_TIF_NEED_RESCHED), %r26
 	and,COND(<>)	%r19, %r26, %r0
 	b,n	syscall_restore	/* skip past if we've nothing to do */
@@ -1789,7 +1783,7 @@ syscall_do_signal:
 	 * consistent with all the relevant state of the process
 	 * before the syscall.  We need to verify this.
 	 */
-	LDREG	TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
+	mfctl	%cr30,%r1
 	ldo	TASK_REGS(%r1), %r26		/* struct pt_regs *regs */
 	reg_save %r26
 
@@ -1800,17 +1794,17 @@ syscall_do_signal:
 	BL	do_notify_resume,%r2
 	ldi	1, %r25				/* long in_syscall = 1 */
 
-	LDREG	TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
+	mfctl	%cr30,%r1
 	ldo	TASK_REGS(%r1), %r20		/* reload pt_regs */
 	reg_restore %r20
 
 	b,n     syscall_check_sig
 
 syscall_restore:
-	LDREG	TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
+	mfctl	%cr30,%r1
 
 	/* Are we being ptraced? */
-	LDREG	TI_FLAGS-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r19
+	LDREG	TASK_TI_FLAGS(%r1),%r19
 	ldi	_TIF_SYSCALL_TRACE_MASK,%r2
 	and,COND(=)	%r19,%r2,%r0
 	b,n	syscall_restore_rfi
diff --git a/arch/parisc/kernel/head.S b/arch/parisc/kernel/head.S
index aa93d775c34d..b24f77748c22 100644
--- a/arch/parisc/kernel/head.S
+++ b/arch/parisc/kernel/head.S
@@ -35,7 +35,8 @@ END(boot_args)
 	__HEAD
 
 	.align	4
-	.import init_thread_union,data
+	.import init_task,data
+	.import init_stack,data
 	.import fault_vector_20,code    /* IVA parisc 2.0 32 bit */
 #ifndef CONFIG_64BIT
         .import fault_vector_11,code    /* IVA parisc 1.1 32 bit */
@@ -123,12 +124,12 @@ $pgt_fill_loop:
 	load32		start_parisc,%r11
 
 	/* And the initial task pointer */
-	load32		init_thread_union,%r6
+	load32		init_task,%r6
 	mtctl           %r6,%cr30
 
 	/* And the stack pointer too */
-	ldo             THREAD_SZ_ALGN(%r6),%sp
-
+	load32		init_stack,%sp
+	tophys_r1	%sp
 #if defined(CONFIG_64BIT) && defined(CONFIG_FUNCTION_TRACER)
 	.import _mcount,data
 	/* initialize mcount FPTR */
@@ -186,12 +187,11 @@ common_stext:
 #endif /*CONFIG_SMP*/
 
 #ifdef CONFIG_64BIT
-	tophys_r1	%sp
+	mfctl		%cr30,%r6		/* PCX-W2 firmware bug */
+	tophys_r1	%r6
 
 	/* Save the rfi target address */
-	ldd             TI_TASK-THREAD_SZ_ALGN(%sp), %r10
-	tophys_r1       %r10
-	std             %r11,  TASK_PT_GR11(%r10)
+	STREG		%r11,  TASK_PT_GR11(%r6)
 	/* Switch to wide mode Superdome doesn't support narrow PDC
 	** calls.
 	*/
@@ -206,7 +206,6 @@ common_stext:
         ** Someday, palo might not do this for the Monarch either.
         */
 2:
-	mfctl		%cr30,%r6		/* PCX-W2 firmware bug */
 
 	ldo             PDC_PSW(%r0),%arg0              /* 21 */
 	ldo             PDC_PSW_SET_DEFAULTS(%r0),%arg1 /* 2 */
@@ -216,13 +215,9 @@ common_stext:
 	copy            %r0,%arg3
 
 stext_pdc_ret:
+	LDREG		TASK_PT_GR11(%r6), %r11
+	tovirt_r1	%r6
 	mtctl		%r6,%cr30		/* restore task thread info */
-
-	/* restore rfi target address*/
-	ldd             TI_TASK-THREAD_SZ_ALGN(%sp), %r10
-	tophys_r1       %r10
-	ldd             TASK_PT_GR11(%r10), %r11
-	tovirt_r1       %sp
 #endif
 	
 	/* PARANOID: clear user scratch/user space SR's */
@@ -287,7 +282,9 @@ aligned_rfi:
 
 	load32		KERNEL_PSW,%r10
 	mtctl		%r10,%ipsw
-	
+
+	tovirt_r1	%sp
+
 	/* Jump through hyperspace to Virt Mode */
 	rfi
 	nop
@@ -343,12 +340,13 @@ smp_slave_stext:
 #endif
 
 	/*  Initialize the SP - monarch sets up smp_init_current_idle_task */
-	load32		PA(smp_init_current_idle_task),%sp
-	LDREG		0(%sp),%sp	/* load task address */
+	load32		PA(smp_init_current_idle_task),%r6
+	LDREG		0(%r6),%r6
+	mtctl		%r6,%cr30
+	tophys_r1	%r6
+	LDREG           TASK_STACK(%r6),%sp
 	tophys_r1	%sp
-	LDREG		TASK_THREAD_INFO(%sp),%sp
-	mtctl           %sp,%cr30       /* store in cr30 */
-	ldo             THREAD_SZ_ALGN(%sp),%sp
+	ldo		FRAME_SIZE(%sp),%sp
 
 	/* point CPU to kernel page tables */
 	load32		PA(swapper_pg_dir),%r4
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index 0d46b19dc4d3..eb18e16362f6 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -15,6 +15,7 @@
 #include <linux/kernel_stat.h>
 #include <linux/seq_file.h>
 #include <linux/types.h>
+#include <linux/sched/task_stack.h>
 #include <asm/io.h>
 
 #include <asm/softirq_stack.h>
@@ -399,8 +400,7 @@ static inline void stack_overflow_check(struct pt_regs *regs)
 #ifdef CONFIG_DEBUG_STACKOVERFLOW
 	#define STACK_MARGIN	(256*6)
 
-	/* Our stack starts directly behind the thread_info struct. */
-	unsigned long stack_start = (unsigned long) current_thread_info();
+	unsigned long stack_start = (unsigned long) task_stack_page(current);
 	unsigned long sp = regs->gr[30];
 	unsigned long stack_usage;
 	unsigned int *last_usage;
@@ -476,7 +476,7 @@ static void execute_on_irq_stack(void *func, unsigned long param1)
 	union_ptr = &per_cpu(irq_stack_union, smp_processor_id());
 	irq_stack = (unsigned long) &union_ptr->stack;
 	irq_stack = ALIGN(irq_stack + sizeof(irq_stack_union.slock),
-			 64); /* align for stack frame usage */
+			FRAME_ALIGN); /* align for stack frame usage */
 
 	/* We may be called recursive. If we are already using the irq stack,
 	 * just continue to use it. Use spinlocks to serialize
diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index 38ec4ae81239..cd749bf3d70d 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -205,7 +205,7 @@ copy_thread(unsigned long clone_flags, unsigned long usp,
 		/* Must exit via ret_from_kernel_thread in order
 		 * to call schedule_tail()
 		 */
-		cregs->ksp = (unsigned long)stack + THREAD_SZ_ALGN + FRAME_SIZE;
+		cregs->ksp = (unsigned long) stack + FRAME_SIZE + PT_SZ_ALGN;
 		cregs->kpc = (unsigned long) &ret_from_kernel_thread;
 		/*
 		 * Copy function and argument to be called from
@@ -228,7 +228,7 @@ copy_thread(unsigned long clone_flags, unsigned long usp,
 			if (likely(usp))
 				cregs->gr[30] = usp;
 		}
-		cregs->ksp = (unsigned long)stack + THREAD_SZ_ALGN + FRAME_SIZE;
+		cregs->ksp = (unsigned long) stack + FRAME_SIZE;
 		cregs->kpc = (unsigned long) &child_return;
 
 		/* Setup thread TLS area */
diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c
index 3413e6949c87..b282c1ce00c8 100644
--- a/arch/parisc/kernel/smp.c
+++ b/arch/parisc/kernel/smp.c
@@ -324,7 +324,7 @@ int smp_boot_one_cpu(int cpuid, struct task_struct *idle)
 	const struct cpuinfo_parisc *p = &per_cpu(cpu_data, cpuid);
 	long timeout;
 
-	task_thread_info(idle)->cpu = cpuid;
+	idle->cpu = cpuid;
 
 	/* Let _start know what logical CPU we're booting
 	** (offset into init_tasks[],cpu_data[])
diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S
index 3f24a0af1e04..c396853184d8 100644
--- a/arch/parisc/kernel/syscall.S
+++ b/arch/parisc/kernel/syscall.S
@@ -139,9 +139,9 @@ linux_gateway_entry:
 	xor     %r1,%r30,%r30                   /* ye olde xor trick */
 	xor     %r1,%r30,%r1
 	xor     %r1,%r30,%r30
-	
-	ldo     THREAD_SZ_ALGN+FRAME_SIZE(%r30),%r30  /* set up kernel stack */
 
+	LDREG	TASK_STACK(%r30),%r30		/* set up kernel stack */
+	ldo	FRAME_SIZE(%r30),%r30
 	/* N.B.: It is critical that we don't set sr7 to 0 until r30
 	 *       contains a valid kernel stack pointer. It is also
 	 *       critical that we don't start using the kernel stack
@@ -152,7 +152,6 @@ linux_gateway_entry:
 	ssm	PSW_SM_I, %r0			/* enable interrupts */
 	STREGM	%r1,FRAME_SIZE(%r30)		/* save r1 (usp) here for now */
 	mfctl	%cr30,%r1			/* get task ptr in %r1 */
-	LDREG	TI_TASK(%r1),%r1
 
 	/* Save some registers for sigcontext and potential task
 	   switch (see entry.S for the details of which ones are
@@ -207,7 +206,7 @@ linux_gateway_entry:
 
 	/* Are we being ptraced? */
 	mfctl	%cr30, %r1
-	LDREG	TI_FLAGS(%r1),%r1
+	LDREG	TASK_TI_FLAGS(%r1),%r1
 	ldi	_TIF_SYSCALL_TRACE_MASK, %r19
 	and,COND(=) %r1, %r19, %r0
 	b,n	.Ltracesys
@@ -272,8 +271,7 @@ tracesys:
 	 * C bit set, a non-straced syscall entry results in C and D clear
 	 * in the saved PSW.
 	 */
-	ldo     -THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1      /* get task ptr */
-	LDREG	TI_TASK(%r1), %r1
+	mfctl	%cr30,%r1			/* get task ptr */
 	ssm	0,%r2
 	STREG	%r2,TASK_PT_PSW(%r1)		/* Lower 8 bits only!! */
 	mfsp	%sr0,%r2
@@ -327,8 +325,7 @@ tracesys_next:
 	 */
 	copy	%ret0,%r20
 
-	ldo     -THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1      /* get task ptr */
-	LDREG	TI_TASK(%r1), %r1
+	mfctl	%cr30,%r1			/* get task ptr */
 	LDREG   TASK_PT_GR28(%r1), %r28		/* Restore return value */
 	LDREG   TASK_PT_GR26(%r1), %r26		/* Restore the users args */
 	LDREG   TASK_PT_GR25(%r1), %r25
@@ -385,16 +382,14 @@ tracesys_next:
 	makes a direct call to syscall_trace. */
 	
 tracesys_exit:
-	ldo     -THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1      /* get task ptr */
-	LDREG	TI_TASK(%r1), %r1
+	mfctl	%cr30,%r1			/* get task ptr */
 #ifdef CONFIG_64BIT
 	ldo	-16(%r30),%r29			/* Reference param save area */
 #endif
 	ldo	TASK_REGS(%r1),%r26
 	BL	do_syscall_trace_exit,%r2
 	STREG   %r28,TASK_PT_GR28(%r1)          /* save return value now */
-	ldo     -THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1      /* get task ptr */
-	LDREG	TI_TASK(%r1), %r1
+	mfctl	%cr30,%r1			/* get task ptr */
 	LDREG   TASK_PT_GR28(%r1), %r28		/* Restore return val. */
 
 	ldil	L%syscall_exit,%r1
@@ -407,8 +402,7 @@ tracesys_exit:
 	ldo	R%tracesys_sigexit(%r2),%r2
 
 tracesys_sigexit:
-	ldo     -THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1      /* get task ptr */
-	LDREG	TI_TASK(%r1), %r1
+	mfctl	%cr30,%r1			/* get task ptr */
 #ifdef CONFIG_64BIT
 	ldo	-16(%r30),%r29			/* Reference param save area */
 #endif
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index 524781eae4dd..690e6abcaf22 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -144,7 +144,7 @@ void show_regs(struct pt_regs *regs)
 	printk("%s IIR: %08lx    ISR: " RFMT "  IOR: " RFMT "\n",
 	       level, regs->iir, regs->isr, regs->ior);
 	printk("%s CPU: %8d   CR30: " RFMT " CR31: " RFMT "\n",
-	       level, current_thread_info()->cpu, cr30, cr31);
+	       level, task_cpu(current), cr30, cr31);
 	printk("%s ORIG_R28: " RFMT "\n", level, regs->orig_r28);
 
 	if (user) {
diff --git a/arch/parisc/kernel/unwind.c b/arch/parisc/kernel/unwind.c
index 34676658c040..42acc3b52017 100644
--- a/arch/parisc/kernel/unwind.c
+++ b/arch/parisc/kernel/unwind.c
@@ -14,6 +14,7 @@
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/sort.h>
+#include <linux/sched/task_stack.h>
 
 #include <linux/uaccess.h>
 #include <asm/assembly.h>
@@ -299,12 +300,9 @@ static void unwind_frame_regs(struct unwind_frame_info *info)
 			info->prev_sp = sp - 64;
 			info->prev_ip = 0;
 
-			/* The stack is at the end inside the thread_union
-			 * struct. If we reach data, we have reached the
-			 * beginning of the stack and should stop unwinding. */
-			if (info->prev_sp >= (unsigned long) task_thread_info(info->t) &&
-			    info->prev_sp < ((unsigned long) task_thread_info(info->t)
-						+ THREAD_SZ_ALGN)) {
+			/* Check if stack is inside kernel stack area */
+			if ((info->prev_sp - (unsigned long) task_stack_page(info->t))
+					>= THREAD_SIZE) {
 				info->prev_sp = 0;
 				break;
 			}
-- 
cgit v1.2.3-71-gd317


From 8d90dbfd4c49b3c36fd6ec287c8049657be8881d Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Sun, 17 Oct 2021 15:24:27 +0200
Subject: parisc: Use PRIV_USER and PRIV_KERNEL in ptrace.h

Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/include/asm/ptrace.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'arch/parisc/include')

diff --git a/arch/parisc/include/asm/ptrace.h b/arch/parisc/include/asm/ptrace.h
index 143fb2a89dd8..eea3f3df0823 100644
--- a/arch/parisc/include/asm/ptrace.h
+++ b/arch/parisc/include/asm/ptrace.h
@@ -5,17 +5,17 @@
 #ifndef _PARISC_PTRACE_H
 #define _PARISC_PTRACE_H
 
+#include <asm/assembly.h>
 #include <uapi/asm/ptrace.h>
 
-
 #define task_regs(task) ((struct pt_regs *) ((char *)(task) + TASK_REGS))
 
 #define arch_has_single_step()	1
 #define arch_has_block_step()	1
 
 /* XXX should we use iaoq[1] or iaoq[0] ? */
-#define user_mode(regs)			(((regs)->iaoq[0] & 3) ? 1 : 0)
-#define user_space(regs)		(((regs)->iasq[1] != 0) ? 1 : 0)
+#define user_mode(regs)			(((regs)->iaoq[0] & 3) != PRIV_KERNEL)
+#define user_space(regs)		((regs)->iasq[1] != PRIV_KERNEL)
 #define instruction_pointer(regs)	((regs)->iaoq[0] & ~3)
 #define user_stack_pointer(regs)	((regs)->gr[30])
 unsigned long profile_pc(struct pt_regs *);
-- 
cgit v1.2.3-71-gd317


From 0760a9157bc93f660256f7014b936c584f3f8fdd Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Sun, 17 Oct 2021 18:56:00 +0200
Subject: parisc: Drop ifdef __KERNEL__ from non-uapi kernel headers

Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/include/asm/bitops.h      | 10 ----------
 arch/parisc/include/asm/futex.h       |  3 ---
 arch/parisc/include/asm/ide.h         |  4 ----
 arch/parisc/include/asm/mckinley.h    |  2 --
 arch/parisc/include/asm/processor.h   |  4 ----
 arch/parisc/include/asm/runway.h      |  2 --
 arch/parisc/include/asm/thread_info.h |  4 ----
 arch/parisc/include/asm/unaligned.h   |  2 --
 8 files changed, 31 deletions(-)

(limited to 'arch/parisc/include')

diff --git a/arch/parisc/include/asm/bitops.h b/arch/parisc/include/asm/bitops.h
index aa4e883431c1..daa2afd974fb 100644
--- a/arch/parisc/include/asm/bitops.h
+++ b/arch/parisc/include/asm/bitops.h
@@ -104,8 +104,6 @@ static __inline__ int test_and_change_bit(int nr, volatile unsigned long * addr)
 
 #include <asm-generic/bitops/non-atomic.h>
 
-#ifdef __KERNEL__
-
 /**
  * __ffs - find first bit in word. returns 0 to "BITS_PER_LONG-1".
  * @word: The word to search
@@ -205,16 +203,8 @@ static __inline__ int fls(unsigned int x)
 #include <asm-generic/bitops/hweight.h>
 #include <asm-generic/bitops/lock.h>
 #include <asm-generic/bitops/sched.h>
-
-#endif /* __KERNEL__ */
-
 #include <asm-generic/bitops/find.h>
-
-#ifdef __KERNEL__
-
 #include <asm-generic/bitops/le.h>
 #include <asm-generic/bitops/ext2-atomic-setbit.h>
 
-#endif	/* __KERNEL__ */
-
 #endif /* _PARISC_BITOPS_H */
diff --git a/arch/parisc/include/asm/futex.h b/arch/parisc/include/asm/futex.h
index fceb9cf02fb3..e38a118cf65d 100644
--- a/arch/parisc/include/asm/futex.h
+++ b/arch/parisc/include/asm/futex.h
@@ -2,8 +2,6 @@
 #ifndef _ASM_PARISC_FUTEX_H
 #define _ASM_PARISC_FUTEX_H
 
-#ifdef __KERNEL__
-
 #include <linux/futex.h>
 #include <linux/uaccess.h>
 #include <asm/atomic.h>
@@ -119,5 +117,4 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
 	return 0;
 }
 
-#endif /*__KERNEL__*/
 #endif /*_ASM_PARISC_FUTEX_H*/
diff --git a/arch/parisc/include/asm/ide.h b/arch/parisc/include/asm/ide.h
index 34cdac01ed35..7aa75b93a1b6 100644
--- a/arch/parisc/include/asm/ide.h
+++ b/arch/parisc/include/asm/ide.h
@@ -12,8 +12,6 @@
 #ifndef __ASM_PARISC_IDE_H
 #define __ASM_PARISC_IDE_H
 
-#ifdef __KERNEL__
-
 /* Generic I/O and MEMIO string operations.  */
 
 #define __ide_insw	insw
@@ -53,6 +51,4 @@ static __inline__ void __ide_mm_outsl(void __iomem *port, void *addr, u32 count)
 	}
 }
 
-#endif /* __KERNEL__ */
-
 #endif /* __ASM_PARISC_IDE_H */
diff --git a/arch/parisc/include/asm/mckinley.h b/arch/parisc/include/asm/mckinley.h
index eb84dbeb7fd9..1314390b9034 100644
--- a/arch/parisc/include/asm/mckinley.h
+++ b/arch/parisc/include/asm/mckinley.h
@@ -1,10 +1,8 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 #ifndef ASM_PARISC_MCKINLEY_H
 #define ASM_PARISC_MCKINLEY_H
-#ifdef __KERNEL__
 
 /* declared in arch/parisc/kernel/setup.c */
 extern struct proc_dir_entry * proc_mckinley_root;
 
-#endif /*__KERNEL__*/
 #endif /*ASM_PARISC_MCKINLEY_H*/
diff --git a/arch/parisc/include/asm/processor.h b/arch/parisc/include/asm/processor.h
index 0d567774f506..95764c3633e4 100644
--- a/arch/parisc/include/asm/processor.h
+++ b/arch/parisc/include/asm/processor.h
@@ -38,16 +38,12 @@
 #define DEFAULT_MAP_BASE	DEFAULT_MAP_BASE32
 #endif
 
-#ifdef __KERNEL__
-
 /* XXX: STACK_TOP actually should be STACK_BOTTOM for parisc.
  * prumpf */
 
 #define STACK_TOP	TASK_SIZE
 #define STACK_TOP_MAX	DEFAULT_TASK_SIZE
 
-#endif
-
 #ifndef __ASSEMBLY__
 
 unsigned long calc_max_stack_size(unsigned long stack_max);
diff --git a/arch/parisc/include/asm/runway.h b/arch/parisc/include/asm/runway.h
index f3cfe69439f6..5cf061376ddb 100644
--- a/arch/parisc/include/asm/runway.h
+++ b/arch/parisc/include/asm/runway.h
@@ -1,7 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 #ifndef ASM_PARISC_RUNWAY_H
 #define ASM_PARISC_RUNWAY_H
-#ifdef __KERNEL__
 
 /* declared in arch/parisc/kernel/setup.c */
 extern struct proc_dir_entry * proc_runway_root;
@@ -9,5 +8,4 @@ extern struct proc_dir_entry * proc_runway_root;
 #define RUNWAY_STATUS	0x10
 #define RUNWAY_DEBUG	0x40
 
-#endif /* __KERNEL__ */
 #endif /* ASM_PARISC_RUNWAY_H */
diff --git a/arch/parisc/include/asm/thread_info.h b/arch/parisc/include/asm/thread_info.h
index 4617303e0620..444588443c04 100644
--- a/arch/parisc/include/asm/thread_info.h
+++ b/arch/parisc/include/asm/thread_info.h
@@ -2,8 +2,6 @@
 #ifndef _ASM_PARISC_THREAD_INFO_H
 #define _ASM_PARISC_THREAD_INFO_H
 
-#ifdef __KERNEL__
-
 #ifndef __ASSEMBLY__
 #include <asm/processor.h>
 #include <asm/special_insns.h>
@@ -80,6 +78,4 @@ struct thread_info {
 # define is_32bit_task()	(1)
 #endif
 
-#endif /* __KERNEL__ */
-
 #endif /* _ASM_PARISC_THREAD_INFO_H */
diff --git a/arch/parisc/include/asm/unaligned.h b/arch/parisc/include/asm/unaligned.h
index 3bda16773ba6..c0621295100d 100644
--- a/arch/parisc/include/asm/unaligned.h
+++ b/arch/parisc/include/asm/unaligned.h
@@ -4,10 +4,8 @@
 
 #include <asm-generic/unaligned.h>
 
-#ifdef __KERNEL__
 struct pt_regs;
 void handle_unaligned(struct pt_regs *regs);
 int check_unaligned(struct pt_regs *regs);
-#endif
 
 #endif /* _ASM_PARISC_UNALIGNED_H */
-- 
cgit v1.2.3-71-gd317


From 3759778e6b8c0d547d77f681a7779edccdf1710a Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Sun, 17 Oct 2021 18:53:31 +0200
Subject: parisc: enhance warning regarding usage of O_NONBLOCK

Instead of showing only the very first application which needs
recompile, show all of them, but print them only once.

Includes typo fix noticed by Colin Ian King.

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
---
 arch/parisc/include/asm/thread_info.h |  1 +
 arch/parisc/kernel/sys_parisc.c       | 10 ++++++----
 2 files changed, 7 insertions(+), 4 deletions(-)

(limited to 'arch/parisc/include')

diff --git a/arch/parisc/include/asm/thread_info.h b/arch/parisc/include/asm/thread_info.h
index 444588443c04..75657c2c54e1 100644
--- a/arch/parisc/include/asm/thread_info.h
+++ b/arch/parisc/include/asm/thread_info.h
@@ -48,6 +48,7 @@ struct thread_info {
 #define TIF_BLOCKSTEP		10	/* branch stepping? */
 #define TIF_SECCOMP		11	/* secure computing */
 #define TIF_SYSCALL_TRACEPOINT	12	/* syscall tracepoint instrumentation */
+#define TIF_NONBLOCK_WARNING	13	/* warned about wrong O_NONBLOCK usage */
 
 #define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
 #define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c
index 5f12537318ab..2b34294517a1 100644
--- a/arch/parisc/kernel/sys_parisc.c
+++ b/arch/parisc/kernel/sys_parisc.c
@@ -409,10 +409,12 @@ long parisc_personality(unsigned long personality)
 
 static int FIX_O_NONBLOCK(int flags)
 {
-	if (flags & O_NONBLOCK_MASK_OUT) {
-		struct task_struct *tsk = current;
-		pr_warn_once("%s(%d) uses a deprecated O_NONBLOCK value.\n",
-			tsk->comm, tsk->pid);
+	if ((flags & O_NONBLOCK_MASK_OUT) &&
+			!test_thread_flag(TIF_NONBLOCK_WARNING)) {
+		set_thread_flag(TIF_NONBLOCK_WARNING);
+		pr_warn("%s(%d) uses a deprecated O_NONBLOCK value."
+			" Please recompile with newer glibc.\n",
+			current->comm, current->pid);
 	}
 	return flags & ~O_NONBLOCK_MASK_OUT;
 }
-- 
cgit v1.2.3-71-gd317