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Revision 8f4fd86aa5d6aa122619623910065d236592e37c authored by David Woodhouse on 06 January 2021, 15:39:55 UTC, committed by Juergen Gross on 13 January 2021, 15:12:03 UTC 
xen: Set platform PCI device INTX affinity to CPU0
 
With INTX or GSI delivery, Xen uses the event channel structures of CPU0.

If the interrupt gets handled by Linux on a different CPU, then no events
are seen as pending. Rather than introducing locking to allow other CPUs
to process CPU0's events, just ensure that the PCI interrupts happens
only on CPU0.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20210106153958.584169-3-dwmw2@infradead.org
Signed-off-by: Juergen Gross <jgross@suse.com>
1 parent 3499ba8
Raw File
of_videomode.c 
// SPDX-License-Identifier: GPL-2.0-only
/*
 * generic videomode helper
 *
 * Copyright (c) 2012 Steffen Trumtrar <s.trumtrar@pengutronix.de>, Pengutronix
 */
#include <linux/errno.h>
#include <linux/export.h>
#include <linux/of.h>
#include <video/display_timing.h>
#include <video/of_display_timing.h>
#include <video/of_videomode.h>
#include <video/videomode.h>

/**
 * of_get_videomode - get the videomode #<index> from devicetree
 * @np - devicenode with the display_timings
 * @vm - set to return value
 * @index - index into list of display_timings
 *	    (Set this to OF_USE_NATIVE_MODE to use whatever mode is
 *	     specified as native mode in the DT.)
 *
 * DESCRIPTION:
 * Get a list of all display timings and put the one
 * specified by index into *vm. This function should only be used, if
 * only one videomode is to be retrieved. A driver that needs to work
 * with multiple/all videomodes should work with
 * of_get_display_timings instead.
 **/
int of_get_videomode(struct device_node *np, struct videomode *vm,
		     int index)
{
	struct display_timings *disp;
	int ret;

	disp = of_get_display_timings(np);
	if (!disp) {
		pr_err("%pOF: no timings specified\n", np);
		return -EINVAL;
	}

	if (index == OF_USE_NATIVE_MODE)
		index = disp->native_mode;

	ret = videomode_from_timings(disp, vm, index);

	display_timings_release(disp);

	return ret;
}
EXPORT_SYMBOL_GPL(of_get_videomode);
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