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Date: Fri, 8 Jan 2021 21:52:23 +0800 From: zhenwei pi <pizhenwei@...edance.com> To: arnd@...db.de, gregkh@...uxfoundation.org Cc: pbonzini@...hat.com, linux-kernel@...r.kernel.org, pizhenwei@...edance.com Subject: [PATCH v3 2/2] misc: pvpanic: introduce module parameter 'events' Suggested by Paolo, add a module parameter that can be used to limit which capabilities the driver uses. Finally, the pvpanic guest driver works by the limitation of both device capability and user setting. Signed-off-by: zhenwei pi <pizhenwei@...edance.com> --- drivers/misc/pvpanic.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/misc/pvpanic.c b/drivers/misc/pvpanic.c index e1023c7b8fb0..417f1086e764 100644 --- a/drivers/misc/pvpanic.c +++ b/drivers/misc/pvpanic.c @@ -19,6 +19,10 @@ #include <uapi/misc/pvpanic.h> static void __iomem *base; +static unsigned int events = PVPANIC_PANICKED | PVPANIC_CRASH_LOADED; +module_param(events, uint, 0644); +MODULE_PARM_DESC(events, "set event limitation of pvpanic device"); + static unsigned int capability = PVPANIC_PANICKED | PVPANIC_CRASH_LOADED; static ssize_t capability_show(struct device *dev, @@ -48,7 +52,7 @@ MODULE_LICENSE("GPL"); static void pvpanic_send_event(unsigned int event) { - if (event & capability) + if (event & capability & events) iowrite8(event, base); } -- 2.25.1
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