mirror of
https://github.com/torvalds/linux.git
synced 2024-11-10 22:21:40 +00:00
70245f86c1
Invoking x86_init.irqs.create_pci_msi_domain() before
x86_init.pci.arch_init() breaks XEN PV.
The XEN_PV specific pci.arch_init() function overrides the default
create_pci_msi_domain() which is obviously too late.
As a consequence the XEN PV PCI/MSI allocation goes through the native
path which runs out of vectors and causes malfunction.
Invoke it after x86_init.pci.arch_init().
Fixes: 6b15ffa07d ("x86/irq: Initialize PCI/MSI domain at PCI init time")
Reported-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Juergen Gross <jgross@suse.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/87pn18djte.fsf@nanos.tec.linutronix.de
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/pci.h>
|
|
#include <linux/init.h>
|
|
#include <asm/pci_x86.h>
|
|
#include <asm/x86_init.h>
|
|
#include <asm/irqdomain.h>
|
|
|
|
/* arch_initcall has too random ordering, so call the initializers
|
|
in the right sequence from here. */
|
|
static __init int pci_arch_init(void)
|
|
{
|
|
int type, pcbios = 1;
|
|
|
|
type = pci_direct_probe();
|
|
|
|
if (!(pci_probe & PCI_PROBE_NOEARLY))
|
|
pci_mmcfg_early_init();
|
|
|
|
if (x86_init.pci.arch_init)
|
|
pcbios = x86_init.pci.arch_init();
|
|
|
|
/*
|
|
* Must happen after x86_init.pci.arch_init(). Xen sets up the
|
|
* x86_init.irqs.create_pci_msi_domain there.
|
|
*/
|
|
x86_create_pci_msi_domain();
|
|
|
|
if (!pcbios)
|
|
return 0;
|
|
|
|
pci_pcbios_init();
|
|
|
|
/*
|
|
* don't check for raw_pci_ops here because we want pcbios as last
|
|
* fallback, yet it's needed to run first to set pcibios_last_bus
|
|
* in case legacy PCI probing is used. otherwise detecting peer busses
|
|
* fails.
|
|
*/
|
|
pci_direct_init(type);
|
|
|
|
if (!raw_pci_ops && !raw_pci_ext_ops)
|
|
printk(KERN_ERR
|
|
"PCI: Fatal: No config space access function found\n");
|
|
|
|
dmi_check_pciprobe();
|
|
|
|
dmi_check_skip_isa_align();
|
|
|
|
return 0;
|
|
}
|
|
arch_initcall(pci_arch_init);
|