mirror of
https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9.git
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Myron Stowe
97af252723
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2124638 Upstream Status: 189c6c33ff421def040b904fb14ef76c5bf5af4c commit 189c6c33ff421def040b904fb14ef76c5bf5af4c Author: Niklas Schnelle <schnelle@linux.ibm.com> Date: Tue Jun 28 16:30:59 2022 +0200 PCI: Extend isolated function probing to s390 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> Signed-off-by: Myron Stowe <mstowe@redhat.com>
44 lines
748 B
C
44 lines
748 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LINUX_HYPEVISOR_H
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#define __LINUX_HYPEVISOR_H
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/*
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* Generic Hypervisor support
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* Juergen Gross <jgross@suse.com>
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*/
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#ifdef CONFIG_X86
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#include <asm/jailhouse_para.h>
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#include <asm/x86_init.h>
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static inline void hypervisor_pin_vcpu(int cpu)
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{
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x86_platform.hyper.pin_vcpu(cpu);
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}
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#else /* !CONFIG_X86 */
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#include <linux/of.h>
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static inline void hypervisor_pin_vcpu(int cpu)
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{
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}
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static inline bool jailhouse_paravirt(void)
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{
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return of_find_compatible_node(NULL, NULL, "jailhouse,cell");
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}
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#endif /* !CONFIG_X86 */
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static inline bool hypervisor_isolated_pci_functions(void)
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{
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if (IS_ENABLED(CONFIG_S390))
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return true;
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return jailhouse_paravirt();
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}
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#endif /* __LINUX_HYPEVISOR_H */
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