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| author | Shuo Liu <shuo.a.liu@intel.com> | 2021-02-21 21:43:39 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-10 09:16:09 +0100 |
| commit | e54b78886949e16301e8ac3cc4b2b43969bfe5fa (patch) | |
| tree | dc53ba030dc738e31f686c3338b0dd8f60b96e7d | |
| parent | 51f24030358bdeeb9e75a38618dd029c5a53beeb (diff) | |
| download | linux-e54b78886949e16301e8ac3cc4b2b43969bfe5fa.tar.gz linux-e54b78886949e16301e8ac3cc4b2b43969bfe5fa.tar.bz2 linux-e54b78886949e16301e8ac3cc4b2b43969bfe5fa.zip | |
virt: acrn: Make remove_cpu sysfs invisible with !CONFIG_HOTPLUG_CPU
Without cpu hotplug support, vCPU cannot be removed from a Service VM.
Don't expose remove_cpu sysfs when CONFIG_HOTPLUG_CPU disabled.
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Qais Yousef <qais.yousef@arm.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Signed-off-by: Shuo Liu <shuo.a.liu@intel.com>
Link: https://lore.kernel.org/r/20210221134339.57851-2-shuo.a.liu@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/virt/acrn/hsm.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/virt/acrn/hsm.c b/drivers/virt/acrn/hsm.c index 1f6b7c54a1a4..6996ea6219e5 100644 --- a/drivers/virt/acrn/hsm.c +++ b/drivers/virt/acrn/hsm.c @@ -404,6 +404,14 @@ fail_remove: } static DEVICE_ATTR_WO(remove_cpu); +static umode_t acrn_attr_visible(struct kobject *kobj, struct attribute *a, int n) +{ + if (a == &dev_attr_remove_cpu.attr) + return IS_ENABLED(CONFIG_HOTPLUG_CPU) ? a->mode : 0; + + return a->mode; +} + static struct attribute *acrn_attrs[] = { &dev_attr_remove_cpu.attr, NULL @@ -411,6 +419,7 @@ static struct attribute *acrn_attrs[] = { static struct attribute_group acrn_attr_group = { .attrs = acrn_attrs, + .is_visible = acrn_attr_visible, }; static const struct attribute_group *acrn_attr_groups[] = { |