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17 May 2024, 11:00:25 UTC
Revision e5fc7345412d5e4758fcef55a74354c5cbefd61e authored by Stefano Stabellini on 01 December 2010, 14:51:44 UTC, committed by Stefano Stabellini on 02 December 2010, 14:28:22 UTC 
xen: use PHYSDEVOP_get_free_pirq to implement find_unbound_pirq
 
Use the new hypercall PHYSDEVOP_get_free_pirq to ask Xen to allocate a
pirq. Remove the unsupported PHYSDEVOP_get_nr_pirqs hypercall to get the
amount of pirq available.

This fixes find_unbound_pirq that otherwise would return a number
starting from nr_irqs that might very well be out of range in Xen.

The symptom of this bug is that when you passthrough an MSI capable pci
device to a PV on HVM guest, Linux would fail to enable MSIs on the
device.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
1 parent e8a7e48
Raw File
Tip revision: e5fc7345412d5e4758fcef55a74354c5cbefd61e authored by Stefano Stabellini on 01 December 2010, 14:51:44 UTC
xen: use PHYSDEVOP_get_free_pirq to implement find_unbound_pirq
Tip revision: e5fc734
version.c 
/*
 *  linux/init/version.c
 *
 *  Copyright (C) 1992  Theodore Ts'o
 *
 *  May be freely distributed as part of Linux.
 */

#include <generated/compile.h>
#include <linux/module.h>
#include <linux/uts.h>
#include <linux/utsname.h>
#include <generated/utsrelease.h>
#include <linux/version.h>

#ifndef CONFIG_KALLSYMS
#define version(a) Version_ ## a
#define version_string(a) version(a)

extern int version_string(LINUX_VERSION_CODE);
int version_string(LINUX_VERSION_CODE);
#endif

struct uts_namespace init_uts_ns = {
	.kref = {
		.refcount	= ATOMIC_INIT(2),
	},
	.name = {
		.sysname	= UTS_SYSNAME,
		.nodename	= UTS_NODENAME,
		.release	= UTS_RELEASE,
		.version	= UTS_VERSION,
		.machine	= UTS_MACHINE,
		.domainname	= UTS_DOMAINNAME,
	},
};
EXPORT_SYMBOL_GPL(init_uts_ns);

/* FIXED STRINGS! Don't touch! */
const char linux_banner[] =
	"Linux version " UTS_RELEASE " (" LINUX_COMPILE_BY "@"
	LINUX_COMPILE_HOST ") (" LINUX_COMPILER ") " UTS_VERSION "\n";

const char linux_proc_banner[] =
	"%s version %s"
	" (" LINUX_COMPILE_BY "@" LINUX_COMPILE_HOST ")"
	" (" LINUX_COMPILER ") %s\n";
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