mirror of
https://github.com/torvalds/linux.git
synced 2026-10-07 05:31:08 -04:00
Niklas Schnelle
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/[email protected] Signed-off-by: Niklas Schnelle <[email protected]> Signed-off-by: Bjorn Helgaas <[email protected]> Reviewed-by: Pierre Morel <[email protected]> Cc: Jan Kiszka <[email protected]>
44 lines
748 B
C
44 lines
748 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __LINUX_HYPEVISOR_H
|
|
#define __LINUX_HYPEVISOR_H
|
|
|
|
/*
|
|
* Generic Hypervisor support
|
|
* Juergen Gross <[email protected]>
|
|
*/
|
|
|
|
#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 */
|