![Deepa Dinamani](/assets/img/avatar_default.png)
All the current architecture specific defines for these are the same. Refactor these common defines to a common header file. The new common linux/compat_time.h is also useful as it will eventually be used to hold all the defines that are needed for compat time types that support non y2038 safe types. New architectures need not have to define these new types as they will only use new y2038 safe syscalls. This file can be deleted after y2038 when we stop supporting non y2038 safe syscalls. The patch also requires an operation similar to: git grep "asm/compat\.h" | cut -d ":" -f 1 | xargs -n 1 sed -i -e "s%asm/compat.h%linux/compat.h%g" Cc: acme@kernel.org Cc: benh@kernel.crashing.org Cc: borntraeger@de.ibm.com Cc: catalin.marinas@arm.com Cc: cmetcalf@mellanox.com Cc: cohuck@redhat.com Cc: davem@davemloft.net Cc: deller@gmx.de Cc: devel@driverdev.osuosl.org Cc: gerald.schaefer@de.ibm.com Cc: gregkh@linuxfoundation.org Cc: heiko.carstens@de.ibm.com Cc: hoeppner@linux.vnet.ibm.com Cc: hpa@zytor.com Cc: jejb@parisc-linux.org Cc: jwi@linux.vnet.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: linux-parisc@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-s390@vger.kernel.org Cc: mark.rutland@arm.com Cc: mingo@redhat.com Cc: mpe@ellerman.id.au Cc: oberpar@linux.vnet.ibm.com Cc: oprofile-list@lists.sf.net Cc: paulus@samba.org Cc: peterz@infradead.org Cc: ralf@linux-mips.org Cc: rostedt@goodmis.org Cc: rric@kernel.org Cc: schwidefsky@de.ibm.com Cc: sebott@linux.vnet.ibm.com Cc: sparclinux@vger.kernel.org Cc: sth@linux.vnet.ibm.com Cc: ubraun@linux.vnet.ibm.com Cc: will.deacon@arm.com Cc: x86@kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: James Hogan <jhogan@kernel.org> Acked-by: Helge Deller <deller@gmx.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
149 lines
3.3 KiB
C
149 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Hypervisor filesystem for Linux on s390.
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* Set Partition-Resource Parameter interface.
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*
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* Copyright IBM Corp. 2013
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* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
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*/
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#include <linux/compat.h>
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#include <linux/errno.h>
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#include <linux/gfp.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/uaccess.h>
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#include <asm/diag.h>
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#include <asm/sclp.h>
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#include "hypfs.h"
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#define DIAG304_SET_WEIGHTS 0
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#define DIAG304_QUERY_PRP 1
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#define DIAG304_SET_CAPPING 2
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#define DIAG304_CMD_MAX 2
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static inline unsigned long __hypfs_sprp_diag304(void *data, unsigned long cmd)
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{
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register unsigned long _data asm("2") = (unsigned long) data;
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register unsigned long _rc asm("3");
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register unsigned long _cmd asm("4") = cmd;
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asm volatile("diag %1,%2,0x304\n"
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: "=d" (_rc) : "d" (_data), "d" (_cmd) : "memory");
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return _rc;
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}
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static unsigned long hypfs_sprp_diag304(void *data, unsigned long cmd)
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{
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diag_stat_inc(DIAG_STAT_X304);
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return __hypfs_sprp_diag304(data, cmd);
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}
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static void hypfs_sprp_free(const void *data)
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{
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free_page((unsigned long) data);
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}
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static int hypfs_sprp_create(void **data_ptr, void **free_ptr, size_t *size)
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{
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unsigned long rc;
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void *data;
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data = (void *) get_zeroed_page(GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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rc = hypfs_sprp_diag304(data, DIAG304_QUERY_PRP);
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if (rc != 1) {
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*data_ptr = *free_ptr = NULL;
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*size = 0;
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free_page((unsigned long) data);
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return -EIO;
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}
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*data_ptr = *free_ptr = data;
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*size = PAGE_SIZE;
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return 0;
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}
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static int __hypfs_sprp_ioctl(void __user *user_area)
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{
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struct hypfs_diag304 diag304;
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unsigned long cmd;
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void __user *udata;
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void *data;
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int rc;
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if (copy_from_user(&diag304, user_area, sizeof(diag304)))
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return -EFAULT;
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if ((diag304.args[0] >> 8) != 0 || diag304.args[1] > DIAG304_CMD_MAX)
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return -EINVAL;
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data = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
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if (!data)
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return -ENOMEM;
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udata = (void __user *)(unsigned long) diag304.data;
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if (diag304.args[1] == DIAG304_SET_WEIGHTS ||
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diag304.args[1] == DIAG304_SET_CAPPING)
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if (copy_from_user(data, udata, PAGE_SIZE)) {
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rc = -EFAULT;
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goto out;
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}
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cmd = *(unsigned long *) &diag304.args[0];
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diag304.rc = hypfs_sprp_diag304(data, cmd);
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if (diag304.args[1] == DIAG304_QUERY_PRP)
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if (copy_to_user(udata, data, PAGE_SIZE)) {
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rc = -EFAULT;
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goto out;
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}
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rc = copy_to_user(user_area, &diag304, sizeof(diag304)) ? -EFAULT : 0;
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out:
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free_page((unsigned long) data);
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return rc;
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}
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static long hypfs_sprp_ioctl(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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void __user *argp;
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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if (is_compat_task())
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argp = compat_ptr(arg);
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else
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argp = (void __user *) arg;
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switch (cmd) {
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case HYPFS_DIAG304:
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return __hypfs_sprp_ioctl(argp);
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default: /* unknown ioctl number */
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return -ENOTTY;
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}
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return 0;
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}
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static struct hypfs_dbfs_file hypfs_sprp_file = {
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.name = "diag_304",
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.data_create = hypfs_sprp_create,
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.data_free = hypfs_sprp_free,
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.unlocked_ioctl = hypfs_sprp_ioctl,
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};
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int hypfs_sprp_init(void)
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{
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if (!sclp.has_sprp)
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return 0;
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return hypfs_dbfs_create_file(&hypfs_sprp_file);
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}
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void hypfs_sprp_exit(void)
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{
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if (!sclp.has_sprp)
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return;
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hypfs_dbfs_remove_file(&hypfs_sprp_file);
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}
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