mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-08-27 15:36:48 +00:00
a02fd05661
Like s390 and the jailhouse hypervisor, LoongArch's PCI architecture allows
passing isolated PCI functions to a guest OS instance. So it is possible
that there is a multi-function device without function 0 for the host or
guest.
Allow probing such functions by adding a IS_ENABLED(CONFIG_LOONGARCH) case
in the hypervisor_isolated_pci_functions() helper.
This is similar to commit 189c6c33ff ("PCI: Extend isolated function
probing to s390").
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20250624062927.4037734-1-chenhuacai@loongson.cn
47 lines
799 B
C
47 lines
799 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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if (IS_ENABLED(CONFIG_LOONGARCH))
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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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