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0fd2a74330
Commit2fae6bb7be("xen/privcmd: Add new syscall to get gsi from dev") adds a weak reverse dependency to the config XEN_PRIVCMD definition, that dependency causes xen-privcmd can't be loaded on domU, because dependent xen-pciback isn't always be loaded successfully on domU. To solve above problem, remove that dependency, and do not call pcistub_get_gsi_from_sbdf() directly, instead add a hook in drivers/xen/apci.c, xen-pciback register the real call function, then in privcmd_ioctl_pcidev_get_gsi call that hook. Fixes:2fae6bb7be("xen/privcmd: Add new syscall to get gsi from dev") Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com> Signed-off-by: Jiqian Chen <Jiqian.Chen@amd.com> Reviewed-by: Juergen Gross <jgross@suse.com> Message-ID: <20241012084537.1543059-1-Jiqian.Chen@amd.com> Signed-off-by: Juergen Gross <jgross@suse.com>
108 lines
3.2 KiB
C
108 lines
3.2 KiB
C
/******************************************************************************
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* acpi.h
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* acpi file for domain 0 kernel
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*
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* Copyright (c) 2011 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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* Copyright (c) 2011 Yu Ke <ke.yu@intel.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation; or, when distributed
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* separately from the Linux kernel or incorporated into other
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* software packages, subject to the following license:
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this source file (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy, modify,
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* merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef _XEN_ACPI_H
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#define _XEN_ACPI_H
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#include <linux/types.h>
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typedef int (*get_gsi_from_sbdf_t)(u32 sbdf);
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#ifdef CONFIG_XEN_DOM0
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#include <asm/xen/hypervisor.h>
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#include <xen/xen.h>
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#include <linux/acpi.h>
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int xen_acpi_notify_hypervisor_sleep(u8 sleep_state,
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u32 pm1a_cnt, u32 pm1b_cnd);
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int xen_acpi_notify_hypervisor_extended_sleep(u8 sleep_state,
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u32 val_a, u32 val_b);
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static inline int xen_acpi_suspend_lowlevel(void)
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{
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/*
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* Xen will save and restore CPU context, so
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* we can skip that and just go straight to
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* the suspend.
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*/
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acpi_enter_sleep_state(ACPI_STATE_S3);
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return 0;
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}
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static inline void xen_acpi_sleep_register(void)
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{
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if (xen_initial_domain()) {
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acpi_os_set_prepare_sleep(
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&xen_acpi_notify_hypervisor_sleep);
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acpi_os_set_prepare_extended_sleep(
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&xen_acpi_notify_hypervisor_extended_sleep);
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acpi_suspend_lowlevel = xen_acpi_suspend_lowlevel;
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}
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}
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int xen_pvh_setup_gsi(int gsi, int trigger, int polarity);
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int xen_acpi_get_gsi_info(struct pci_dev *dev,
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int *gsi_out,
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int *trigger_out,
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int *polarity_out);
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void xen_acpi_register_get_gsi_func(get_gsi_from_sbdf_t func);
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int xen_acpi_get_gsi_from_sbdf(u32 sbdf);
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#else
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static inline void xen_acpi_sleep_register(void)
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{
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}
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static inline int xen_pvh_setup_gsi(int gsi, int trigger, int polarity)
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{
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return -1;
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}
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static inline int xen_acpi_get_gsi_info(struct pci_dev *dev,
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int *gsi_out,
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int *trigger_out,
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int *polarity_out)
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{
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return -1;
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}
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static inline void xen_acpi_register_get_gsi_func(get_gsi_from_sbdf_t func)
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{
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}
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static inline int xen_acpi_get_gsi_from_sbdf(u32 sbdf)
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{
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return -1;
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}
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#endif
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#endif /* _XEN_ACPI_H */
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