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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>
152 lines
4.3 KiB
C
152 lines
4.3 KiB
C
/******************************************************************************
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* acpi.c
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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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#include <linux/pci.h>
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#include <xen/acpi.h>
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#include <xen/interface/platform.h>
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#include <asm/xen/hypercall.h>
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#include <asm/xen/hypervisor.h>
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static int xen_acpi_notify_hypervisor_state(u8 sleep_state,
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u32 val_a, u32 val_b,
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bool extended)
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{
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unsigned int bits = extended ? 8 : 16;
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struct xen_platform_op op = {
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.cmd = XENPF_enter_acpi_sleep,
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.interface_version = XENPF_INTERFACE_VERSION,
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.u.enter_acpi_sleep = {
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.val_a = (u16)val_a,
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.val_b = (u16)val_b,
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.sleep_state = sleep_state,
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.flags = extended ? XENPF_ACPI_SLEEP_EXTENDED : 0,
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},
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};
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if (WARN((val_a & (~0 << bits)) || (val_b & (~0 << bits)),
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"Using more than %u bits of sleep control values %#x/%#x!"
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"Email xen-devel@lists.xen.org - Thank you.\n", \
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bits, val_a, val_b))
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return -1;
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HYPERVISOR_platform_op(&op);
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return 1;
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}
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int xen_acpi_notify_hypervisor_sleep(u8 sleep_state,
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u32 pm1a_cnt, u32 pm1b_cnt)
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{
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return xen_acpi_notify_hypervisor_state(sleep_state, pm1a_cnt,
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pm1b_cnt, false);
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}
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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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{
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return xen_acpi_notify_hypervisor_state(sleep_state, val_a,
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val_b, true);
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}
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struct acpi_prt_entry {
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struct acpi_pci_id id;
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u8 pin;
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acpi_handle link;
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u32 index;
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};
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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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{
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int gsi;
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u8 pin;
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struct acpi_prt_entry *entry;
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int trigger = ACPI_LEVEL_SENSITIVE;
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int polarity = acpi_irq_model == ACPI_IRQ_MODEL_GIC ?
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ACPI_ACTIVE_HIGH : ACPI_ACTIVE_LOW;
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if (!dev || !gsi_out || !trigger_out || !polarity_out)
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return -EINVAL;
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pin = dev->pin;
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if (!pin)
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return -EINVAL;
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entry = acpi_pci_irq_lookup(dev, pin);
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if (entry) {
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if (entry->link)
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gsi = acpi_pci_link_allocate_irq(entry->link,
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entry->index,
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&trigger, &polarity,
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NULL);
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else
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gsi = entry->index;
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} else
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gsi = -1;
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if (gsi < 0)
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return -EINVAL;
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*gsi_out = gsi;
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*trigger_out = trigger;
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*polarity_out = polarity;
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return 0;
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}
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EXPORT_SYMBOL_GPL(xen_acpi_get_gsi_info);
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static get_gsi_from_sbdf_t get_gsi_from_sbdf;
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static DEFINE_RWLOCK(get_gsi_from_sbdf_lock);
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void xen_acpi_register_get_gsi_func(get_gsi_from_sbdf_t func)
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{
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write_lock(&get_gsi_from_sbdf_lock);
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get_gsi_from_sbdf = func;
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write_unlock(&get_gsi_from_sbdf_lock);
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}
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EXPORT_SYMBOL_GPL(xen_acpi_register_get_gsi_func);
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int xen_acpi_get_gsi_from_sbdf(u32 sbdf)
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{
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int ret = -EOPNOTSUPP;
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read_lock(&get_gsi_from_sbdf_lock);
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if (get_gsi_from_sbdf)
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ret = get_gsi_from_sbdf(sbdf);
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read_unlock(&get_gsi_from_sbdf_lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(xen_acpi_get_gsi_from_sbdf);
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