forked from mirrors/linux
189c6c33ff
Like the jailhouse hypervisor, s390's PCI architecture allows passing isolated PCI functions to a guest OS instance. As of now this is was not utilized even with multi-function support as the s390 PCI code makes sure that only virtual PCI busses including a function with devfn 0 are presented to the PCI subsystem. A subsequent change will remove this restriction. Allow probing such functions by replacing the existing check for jailhouse_paravirt() with a new hypervisor_isolated_pci_functions() helper. Link: https://lore.kernel.org/r/20220628143100.3228092-5-schnelle@linux.ibm.com Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> Cc: Jan Kiszka <jan.kiszka@siemens.com>
43 lines
748 B
C
43 lines
748 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __LINUX_HYPEVISOR_H
|
|
#define __LINUX_HYPEVISOR_H
|
|
|
|
/*
|
|
* Generic Hypervisor support
|
|
* Juergen Gross <jgross@suse.com>
|
|
*/
|
|
|
|
#ifdef CONFIG_X86
|
|
|
|
#include <asm/jailhouse_para.h>
|
|
#include <asm/x86_init.h>
|
|
|
|
static inline void hypervisor_pin_vcpu(int cpu)
|
|
{
|
|
x86_platform.hyper.pin_vcpu(cpu);
|
|
}
|
|
|
|
#else /* !CONFIG_X86 */
|
|
|
|
#include <linux/of.h>
|
|
|
|
static inline void hypervisor_pin_vcpu(int cpu)
|
|
{
|
|
}
|
|
|
|
static inline bool jailhouse_paravirt(void)
|
|
{
|
|
return of_find_compatible_node(NULL, NULL, "jailhouse,cell");
|
|
}
|
|
|
|
#endif /* !CONFIG_X86 */
|
|
|
|
static inline bool hypervisor_isolated_pci_functions(void)
|
|
{
|
|
if (IS_ENABLED(CONFIG_S390))
|
|
return true;
|
|
|
|
return jailhouse_paravirt();
|
|
}
|
|
|
|
#endif /* __LINUX_HYPEVISOR_H */
|