/* * net/dsa/hwmon.c - HWMON subsystem support * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include #include #include #include "dsa_priv.h" static ssize_t temp1_input_show(struct device *dev, struct device_attribute *attr, char *buf) { struct dsa_switch *ds = dev_get_drvdata(dev); int temp, ret; ret = ds->ops->get_temp(ds, &temp); if (ret < 0) return ret; return sprintf(buf, "%d\n", temp * 1000); } static DEVICE_ATTR_RO(temp1_input); static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr, char *buf) { struct dsa_switch *ds = dev_get_drvdata(dev); int temp, ret; ret = ds->ops->get_temp_limit(ds, &temp); if (ret < 0) return ret; return sprintf(buf, "%d\n", temp * 1000); } static ssize_t temp1_max_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct dsa_switch *ds = dev_get_drvdata(dev); int temp, ret; ret = kstrtoint(buf, 0, &temp); if (ret < 0) return ret; ret = ds->ops->set_temp_limit(ds, DIV_ROUND_CLOSEST(temp, 1000)); if (ret < 0) return ret; return count; } static DEVICE_ATTR_RW(temp1_max); static ssize_t temp1_max_alarm_show(struct device *dev, struct device_attribute *attr, char *buf) { struct dsa_switch *ds = dev_get_drvdata(dev); bool alarm; int ret; ret = ds->ops->get_temp_alarm(ds, &alarm); if (ret < 0) return ret; return sprintf(buf, "%d\n", alarm); } static DEVICE_ATTR_RO(temp1_max_alarm); static struct attribute *dsa_hwmon_attrs[] = { &dev_attr_temp1_input.attr, /* 0 */ &dev_attr_temp1_max.attr, /* 1 */ &dev_attr_temp1_max_alarm.attr, /* 2 */ NULL }; static umode_t dsa_hwmon_attrs_visible(struct kobject *kobj, struct attribute *attr, int index) { struct device *dev = container_of(kobj, struct device, kobj); struct dsa_switch *ds = dev_get_drvdata(dev); const struct dsa_switch_ops *ops = ds->ops; umode_t mode = attr->mode; if (index == 1) { if (!ops->get_temp_limit) mode = 0; else if (!ops->set_temp_limit) mode &= ~S_IWUSR; } else if (index == 2 && !ops->get_temp_alarm) { mode = 0; } return mode; } static const struct attribute_group dsa_hwmon_group = { .attrs = dsa_hwmon_attrs, .is_visible = dsa_hwmon_attrs_visible, }; __ATTRIBUTE_GROUPS(dsa_hwmon); void dsa_hwmon_register(struct dsa_switch *ds) { const char *netname = netdev_name(ds->dst->master_netdev); char hname[IFNAMSIZ + 1]; int i, j; /* If the switch provides temperature accessors, register with hardware * monitoring subsystem. Treat registration error as non-fatal. */ if (!ds->ops->get_temp) return; /* Create valid hwmon 'name' attribute */ for (i = j = 0; i < IFNAMSIZ && netname[i]; i++) { if (isalnum(netname[i])) hname[j++] = netname[i]; } hname[j] = '\0'; scnprintf(ds->hwmon_name, sizeof(ds->hwmon_name), "%s_dsa%d", hname, ds->index); ds->hwmon_dev = hwmon_device_register_with_groups(NULL, ds->hwmon_name, ds, dsa_hwmon_groups); if (IS_ERR(ds->hwmon_dev)) { pr_warn("DSA: failed to register HWMON subsystem for switch %d\n", ds->index); ds->hwmon_dev = NULL; } else { pr_info("DSA: registered HWMON subsystem for switch %d\n", ds->index); } } void dsa_hwmon_unregister(struct dsa_switch *ds) { if (ds->hwmon_dev) { hwmon_device_unregister(ds->hwmon_dev); ds->hwmon_dev = NULL; } } e='7'>7space:mode:
authorJiri Kosina <jkosina@suse.cz>2017-01-27 22:25:52 +0000
committerIngo Molnar <mingo@kernel.org>2017-01-28 09:18:56 +0100
commitbf29bddf0417a4783da3b24e8c9e017ac649326f (patch)
tree54a05a4883b73f80e4e1d8c4b15750aa01c39932 /fs/xfs/xfs_dquot.c
parent883af14e67e8b8702b5560aa64c888c0cd0bd66c (diff)
x86/efi: Always map the first physical page into the EFI pagetables
Commit: 129766708 ("x86/efi: Only map RAM into EFI page tables if in mixed-mode") stopped creating 1:1 mappings for all RAM, when running in native 64-bit mode. It turns out though that there are 64-bit EFI implementations in the wild (this particular problem has been reported on a Lenovo Yoga 710-11IKB), which still make use of the first physical page for their own private use, even though they explicitly mark it EFI_CONVENTIONAL_MEMORY in the memory map. In case there is no mapping for this particular frame in the EFI pagetables, as soon as firmware tries to make use of it, a triple fault occurs and the system reboots (in case of the Yoga 710-11IKB this is very early during bootup). Fix that by always mapping the first page of physical memory into the EFI pagetables. We're free to hand this page to the BIOS, as trim_bios_range() will reserve the first page and isolate it away from memory allocators anyway. Note that just reverting 129766708 alone is not enough on v4.9-rc1+ to fix the regression on affected hardware, as this commit: ab72a27da ("x86/efi: Consolidate region mapping logic") later made the first physical frame not to be mapped anyway. Reported-by: Hanka Pavlikova <hanka@ucw.cz> Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Borislav Petkov <bp@suse.de> Cc: Laura Abbott <labbott@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vojtech Pavlik <vojtech@ucw.cz> Cc: Waiman Long <waiman.long@hpe.com> Cc: linux-efi@vger.kernel.org Cc: stable@kernel.org # v4.8+ Fixes: 129766708 ("x86/efi: Only map RAM into EFI page tables if in mixed-mode") Link: http://lkml.kernel.org/r/20170127222552.22336-1-matt@codeblueprint.co.uk [ Tidied up the changelog and the comment. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'fs/xfs/xfs_dquot.c')