mirror of
https://github.com/torvalds/linux.git
synced 2024-11-22 12:11:40 +00:00
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
/******************************************************************************
|
|
* acpi.c
|
|
* acpi file for domain 0 kernel
|
|
*
|
|
* Copyright (c) 2011 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
|
|
* Copyright (c) 2011 Yu Ke ke.yu@intel.com
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License version 2
|
|
* as published by the Free Software Foundation; or, when distributed
|
|
* separately from the Linux kernel or incorporated into other
|
|
* software packages, subject to the following license:
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this source file (the "Software"), to deal in the Software without
|
|
* restriction, including without limitation the rights to use, copy, modify,
|
|
* merge, publish, distribute, sublicense, and/or sell copies of the Software,
|
|
* and to permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
* IN THE SOFTWARE.
|
|
*/
|
|
|
|
#include <linux/pci.h>
|
|
#include <xen/acpi.h>
|
|
#include <xen/interface/platform.h>
|
|
#include <asm/xen/hypercall.h>
|
|
#include <asm/xen/hypervisor.h>
|
|
|
|
static int xen_acpi_notify_hypervisor_state(u8 sleep_state,
|
|
u32 val_a, u32 val_b,
|
|
bool extended)
|
|
{
|
|
unsigned int bits = extended ? 8 : 16;
|
|
|
|
struct xen_platform_op op = {
|
|
.cmd = XENPF_enter_acpi_sleep,
|
|
.interface_version = XENPF_INTERFACE_VERSION,
|
|
.u.enter_acpi_sleep = {
|
|
.val_a = (u16)val_a,
|
|
.val_b = (u16)val_b,
|
|
.sleep_state = sleep_state,
|
|
.flags = extended ? XENPF_ACPI_SLEEP_EXTENDED : 0,
|
|
},
|
|
};
|
|
|
|
if (WARN((val_a & (~0 << bits)) || (val_b & (~0 << bits)),
|
|
"Using more than %u bits of sleep control values %#x/%#x!"
|
|
"Email xen-devel@lists.xen.org - Thank you.\n", \
|
|
bits, val_a, val_b))
|
|
return -1;
|
|
|
|
HYPERVISOR_platform_op(&op);
|
|
return 1;
|
|
}
|
|
|
|
int xen_acpi_notify_hypervisor_sleep(u8 sleep_state,
|
|
u32 pm1a_cnt, u32 pm1b_cnt)
|
|
{
|
|
return xen_acpi_notify_hypervisor_state(sleep_state, pm1a_cnt,
|
|
pm1b_cnt, false);
|
|
}
|
|
|
|
int xen_acpi_notify_hypervisor_extended_sleep(u8 sleep_state,
|
|
u32 val_a, u32 val_b)
|
|
{
|
|
return xen_acpi_notify_hypervisor_state(sleep_state, val_a,
|
|
val_b, true);
|
|
}
|
|
|
|
struct acpi_prt_entry {
|
|
struct acpi_pci_id id;
|
|
u8 pin;
|
|
acpi_handle link;
|
|
u32 index;
|
|
};
|
|
|
|
int xen_acpi_get_gsi_info(struct pci_dev *dev,
|
|
int *gsi_out,
|
|
int *trigger_out,
|
|
int *polarity_out)
|
|
{
|
|
int gsi;
|
|
u8 pin;
|
|
struct acpi_prt_entry *entry;
|
|
int trigger = ACPI_LEVEL_SENSITIVE;
|
|
int polarity = acpi_irq_model == ACPI_IRQ_MODEL_GIC ?
|
|
ACPI_ACTIVE_HIGH : ACPI_ACTIVE_LOW;
|
|
|
|
if (!dev || !gsi_out || !trigger_out || !polarity_out)
|
|
return -EINVAL;
|
|
|
|
pin = dev->pin;
|
|
if (!pin)
|
|
return -EINVAL;
|
|
|
|
entry = acpi_pci_irq_lookup(dev, pin);
|
|
if (entry) {
|
|
if (entry->link)
|
|
gsi = acpi_pci_link_allocate_irq(entry->link,
|
|
entry->index,
|
|
&trigger, &polarity,
|
|
NULL);
|
|
else
|
|
gsi = entry->index;
|
|
} else
|
|
gsi = -1;
|
|
|
|
if (gsi < 0)
|
|
return -EINVAL;
|
|
|
|
*gsi_out = gsi;
|
|
*trigger_out = trigger;
|
|
*polarity_out = polarity;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(xen_acpi_get_gsi_info);
|
|
|
|
static get_gsi_from_sbdf_t get_gsi_from_sbdf;
|
|
static DEFINE_RWLOCK(get_gsi_from_sbdf_lock);
|
|
|
|
void xen_acpi_register_get_gsi_func(get_gsi_from_sbdf_t func)
|
|
{
|
|
write_lock(&get_gsi_from_sbdf_lock);
|
|
get_gsi_from_sbdf = func;
|
|
write_unlock(&get_gsi_from_sbdf_lock);
|
|
}
|
|
EXPORT_SYMBOL_GPL(xen_acpi_register_get_gsi_func);
|
|
|
|
int xen_acpi_get_gsi_from_sbdf(u32 sbdf)
|
|
{
|
|
int ret = -EOPNOTSUPP;
|
|
|
|
read_lock(&get_gsi_from_sbdf_lock);
|
|
if (get_gsi_from_sbdf)
|
|
ret = get_gsi_from_sbdf(sbdf);
|
|
read_unlock(&get_gsi_from_sbdf_lock);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(xen_acpi_get_gsi_from_sbdf);
|