Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261964AbVDVPMj (ORCPT ); Fri, 22 Apr 2005 11:12:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262049AbVDVPKG (ORCPT ); Fri, 22 Apr 2005 11:10:06 -0400 Received: from mtagate3.de.ibm.com ([195.212.29.152]:59270 "EHLO mtagate3.de.ibm.com") by vger.kernel.org with ESMTP id S261964AbVDVPAf (ORCPT ); Fri, 22 Apr 2005 11:00:35 -0400 Date: Fri, 22 Apr 2005 17:00:03 +0200 From: Martin Schwidefsky To: akpm@osdl.org, linux-kernel@vger.kernel.org Subject: [patch 4/12] s390: default storage key. Message-ID: <20050422150002.GD17508@mschwid3.boeblingen.de.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 9473 Lines: 272 [patch 4/12] s390: default storage key. From: Peter Oberparleiter Provide an easy way to define a non-zero storage key at compile time. This is useful for debugging purposes. Signed-off-by: Martin Schwidefsky diffstat: arch/s390/kernel/s390_ksyms.c | 1 - arch/s390/kernel/setup.c | 20 ++++++++++++++++---- drivers/s390/cio/cio.c | 4 ++-- drivers/s390/cio/device_ops.c | 6 +++--- drivers/s390/cio/qdio.h | 6 ++++-- include/asm-s390/page.h | 2 ++ include/asm-s390/processor.h | 2 +- include/asm-s390/ptrace.h | 16 +++++++++++++--- 8 files changed, 41 insertions(+), 16 deletions(-) diff -urpN linux-2.6/arch/s390/kernel/s390_ksyms.c linux-2.6-patched/arch/s390/kernel/s390_ksyms.c --- linux-2.6/arch/s390/kernel/s390_ksyms.c 2005-03-02 08:38:12.000000000 +0100 +++ linux-2.6-patched/arch/s390/kernel/s390_ksyms.c 2005-04-22 15:45:01.000000000 +0200 @@ -34,7 +34,6 @@ EXPORT_SYMBOL(__clear_user_asm); EXPORT_SYMBOL(__strncpy_from_user_asm); EXPORT_SYMBOL(__strnlen_user_asm); EXPORT_SYMBOL(diag10); -EXPORT_SYMBOL(default_storage_key); /* * semaphore ops diff -urpN linux-2.6/arch/s390/kernel/setup.c linux-2.6-patched/arch/s390/kernel/setup.c --- linux-2.6/arch/s390/kernel/setup.c 2005-04-22 15:45:01.000000000 +0200 +++ linux-2.6-patched/arch/s390/kernel/setup.c 2005-04-22 15:45:01.000000000 +0200 @@ -44,6 +44,8 @@ #include #include #include +#include +#include /* * Machine setup.. @@ -53,7 +55,6 @@ unsigned int console_devno = -1; unsigned int console_irq = -1; unsigned long memory_size = 0; unsigned long machine_flags = 0; -unsigned int default_storage_key = 0; struct { unsigned long addr, size, type; } memory_chunk[MEMORY_CHUNKS] = { { 0 } }; @@ -402,7 +403,7 @@ setup_lowcore(void) lc = (struct _lowcore *) __alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0); memset(lc, 0, lc_pages * PAGE_SIZE); - lc->restart_psw.mask = PSW_BASE_BITS; + lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; lc->restart_psw.addr = PSW_ADDR_AMODE | (unsigned long) restart_int_handler; lc->external_new_psw.mask = PSW_KERNEL_BITS; @@ -470,7 +471,7 @@ static void __init setup_memory(void) { unsigned long bootmap_size; - unsigned long start_pfn, end_pfn; + unsigned long start_pfn, end_pfn, init_pfn; unsigned long last_rw_end; int i; @@ -481,6 +482,10 @@ setup_memory(void) start_pfn = (__pa(&_end) + PAGE_SIZE - 1) >> PAGE_SHIFT; end_pfn = max_pfn = memory_end >> PAGE_SHIFT; + /* Initialize storage key for kernel pages */ + for (init_pfn = 0 ; init_pfn < start_pfn; init_pfn++) + page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY); + /* * Initialize the boot-time allocator (with low memory only): */ @@ -491,7 +496,7 @@ setup_memory(void) */ last_rw_end = start_pfn; - for (i = 0; i < 16 && memory_chunk[i].size > 0; i++) { + for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { unsigned long start_chunk, end_chunk; if (memory_chunk[i].type != CHUNK_READ_WRITE) @@ -505,6 +510,11 @@ setup_memory(void) if (end_chunk > end_pfn) end_chunk = end_pfn; if (start_chunk < end_chunk) { + /* Initialize storage key for RAM pages */ + for (init_pfn = start_chunk ; init_pfn < end_chunk; + init_pfn++) + page_set_storage_key(init_pfn << PAGE_SHIFT, + PAGE_DEFAULT_KEY); free_bootmem(start_chunk << PAGE_SHIFT, (end_chunk - start_chunk) << PAGE_SHIFT); if (last_rw_end < start_chunk) @@ -513,6 +523,8 @@ setup_memory(void) } } + psw_set_key(PAGE_DEFAULT_KEY); + if (last_rw_end < end_pfn - 1) add_memory_hole(last_rw_end, end_pfn - 1); diff -urpN linux-2.6/drivers/s390/cio/cio.c linux-2.6-patched/drivers/s390/cio/cio.c --- linux-2.6/drivers/s390/cio/cio.c 2005-04-22 15:44:48.000000000 +0200 +++ linux-2.6-patched/drivers/s390/cio/cio.c 2005-04-22 15:45:01.000000000 +0200 @@ -1,7 +1,7 @@ /* * drivers/s390/cio/cio.c * S/390 common I/O routines -- low level i/o calls - * $Revision: 1.131 $ + * $Revision: 1.133 $ * * Copyright (C) 1999-2002 IBM Deutschland Entwicklung GmbH, * IBM Corporation @@ -228,7 +228,7 @@ cio_start_key (struct subchannel *sch, / int cio_start (struct subchannel *sch, struct ccw1 *cpa, __u8 lpm) { - return cio_start_key(sch, cpa, lpm, default_storage_key); + return cio_start_key(sch, cpa, lpm, PAGE_DEFAULT_KEY); } /* diff -urpN linux-2.6/drivers/s390/cio/device_ops.c linux-2.6-patched/drivers/s390/cio/device_ops.c --- linux-2.6/drivers/s390/cio/device_ops.c 2005-04-22 15:44:48.000000000 +0200 +++ linux-2.6-patched/drivers/s390/cio/device_ops.c 2005-04-22 15:45:01.000000000 +0200 @@ -1,7 +1,7 @@ /* * drivers/s390/cio/device_ops.c * - * $Revision: 1.55 $ + * $Revision: 1.56 $ * * Copyright (C) 2002 IBM Deutschland Entwicklung GmbH, * IBM Corporation @@ -128,7 +128,7 @@ ccw_device_start(struct ccw_device *cdev unsigned long intparm, __u8 lpm, unsigned long flags) { return ccw_device_start_key(cdev, cpa, intparm, lpm, - default_storage_key, flags); + PAGE_DEFAULT_KEY, flags); } int @@ -137,7 +137,7 @@ ccw_device_start_timeout(struct ccw_devi int expires) { return ccw_device_start_timeout_key(cdev, cpa, intparm, lpm, - default_storage_key, flags, + PAGE_DEFAULT_KEY, flags, expires); } diff -urpN linux-2.6/drivers/s390/cio/qdio.h linux-2.6-patched/drivers/s390/cio/qdio.h --- linux-2.6/drivers/s390/cio/qdio.h 2005-03-02 08:37:50.000000000 +0100 +++ linux-2.6-patched/drivers/s390/cio/qdio.h 2005-04-22 15:45:01.000000000 +0200 @@ -1,7 +1,9 @@ #ifndef _CIO_QDIO_H #define _CIO_QDIO_H -#define VERSION_CIO_QDIO_H "$Revision: 1.26 $" +#include + +#define VERSION_CIO_QDIO_H "$Revision: 1.32 $" #ifdef CONFIG_QDIO_DEBUG #define QDIO_VERBOSE_LEVEL 9 @@ -42,7 +44,7 @@ #define QDIO_Q_LAPS 5 -#define QDIO_STORAGE_KEY 0 +#define QDIO_STORAGE_KEY PAGE_DEFAULT_KEY #define L2_CACHELINE_SIZE 256 #define INDICATORS_PER_CACHELINE (L2_CACHELINE_SIZE/sizeof(__u32)) diff -urpN linux-2.6/include/asm-s390/page.h linux-2.6-patched/include/asm-s390/page.h --- linux-2.6/include/asm-s390/page.h 2005-03-02 08:37:49.000000000 +0100 +++ linux-2.6-patched/include/asm-s390/page.h 2005-04-22 15:45:01.000000000 +0200 @@ -16,6 +16,8 @@ #define PAGE_SHIFT 12 #define PAGE_SIZE (1UL << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) +#define PAGE_DEFAULT_ACC 0 +#define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4) #ifdef __KERNEL__ #ifndef __ASSEMBLY__ diff -urpN linux-2.6/include/asm-s390/processor.h linux-2.6-patched/include/asm-s390/processor.h --- linux-2.6/include/asm-s390/processor.h 2005-04-22 15:44:53.000000000 +0200 +++ linux-2.6-patched/include/asm-s390/processor.h 2005-04-22 15:45:01.000000000 +0200 @@ -245,7 +245,7 @@ static inline void enabled_wait(void) psw_t wait_psw; wait_psw.mask = PSW_BASE_BITS | PSW_MASK_IO | PSW_MASK_EXT | - PSW_MASK_MCHECK | PSW_MASK_WAIT; + PSW_MASK_MCHECK | PSW_MASK_WAIT | PSW_DEFAULT_KEY; #ifndef __s390x__ asm volatile ( " basr %0,0\n" diff -urpN linux-2.6/include/asm-s390/ptrace.h linux-2.6-patched/include/asm-s390/ptrace.h --- linux-2.6/include/asm-s390/ptrace.h 2005-03-02 08:38:13.000000000 +0100 +++ linux-2.6-patched/include/asm-s390/ptrace.h 2005-04-22 15:45:01.000000000 +0200 @@ -185,6 +185,7 @@ #include #include #include +#include typedef union { @@ -235,6 +236,7 @@ typedef struct #define PSW_ADDR_INSN 0x7FFFFFFFUL #define PSW_BASE_BITS 0x00080000UL +#define PSW_DEFAULT_KEY (((unsigned long) PAGE_DEFAULT_ACC) << 20) #define PSW_ASC_PRIMARY 0x00000000UL #define PSW_ASC_ACCREG 0x00004000UL @@ -260,6 +262,7 @@ typedef struct #define PSW_BASE_BITS 0x0000000180000000UL #define PSW_BASE32_BITS 0x0000000080000000UL +#define PSW_DEFAULT_KEY (((unsigned long) PAGE_DEFAULT_ACC) << 52) #define PSW_ASC_PRIMARY 0x0000000000000000UL #define PSW_ASC_ACCREG 0x0000400000000000UL @@ -268,14 +271,15 @@ typedef struct #define PSW_USER32_BITS (PSW_BASE32_BITS | PSW_MASK_DAT | PSW_ASC_HOME | \ PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | \ - PSW_MASK_PSTATE) + PSW_MASK_PSTATE | PSW_DEFAULT_KEY) #endif /* __s390x__ */ -#define PSW_KERNEL_BITS (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY) +#define PSW_KERNEL_BITS (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY | \ + PSW_DEFAULT_KEY) #define PSW_USER_BITS (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | \ PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | \ - PSW_MASK_PSTATE) + PSW_MASK_PSTATE | PSW_DEFAULT_KEY) /* This macro merges a NEW PSW mask specified by the user into the currently active PSW mask CURRENT, modifying only those @@ -470,6 +474,12 @@ struct user_regs_struct extern void show_regs(struct pt_regs * regs); #endif +static inline void +psw_set_key(unsigned int key) +{ + asm volatile ( "spka 0(%0)" : : "d" (key) ); +} + #endif /* __ASSEMBLY__ */ #endif /* _S390_PTRACE_H */ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/