UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

genirq/msi: Add size info to struct msi_domain_info 

To allow proper range checking especially for dynamic allocations add a
size field to struct msi_domain_info. If the field is 0 then the size is
unknown or unlimited (up to MSI_MAX_INDEX) to provide backwards
compability.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221124232325.501144862@linutronix.de
This commit is contained in:
Thomas Gleixner 2022-11-25 00:25:51 +01:00
parent ebca4396ee
commit 61bf992fc6
2 changed files with 16 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
include/linux/msi.h
View File

@ -422,6 +422,10 @@ struct msi_domain_ops {
* struct msi_domain_info - MSI interrupt domain data
* @flags: Flags to decribe features and capabilities
* @bus_token: The domain bus token
* @hwsize: The hardware table size or the software index limit.
* If 0 then the size is considered unlimited and
* gets initialized to the maximum software index limit
* by the domain creation code.
* @ops: The callback data structure
* @chip: Optional: associated interrupt chip
* @chip_data: Optional: associated interrupt chip data
@ -433,6 +437,7 @@ struct msi_domain_ops {
struct msi_domain_info {
u32 flags;
enum irq_domain_bus_token bus_token;
unsigned int hwsize;
struct msi_domain_ops *ops;
struct irq_chip *chip;
void *chip_data;

11
kernel/irq/msi.c
View File

@ -772,6 +772,17 @@ struct irq_domain *msi_create_irq_domain(struct fwnode_handle *fwnode,
{
struct irq_domain *domain;
if (info->hwsize > MSI_XA_DOMAIN_SIZE)
return NULL;
/*
* Hardware size 0 is valid for backwards compatibility and for
* domains which are not backed by a hardware table. Grant the
* maximum index space.
*/
if (!info->hwsize)
info->hwsize = MSI_XA_DOMAIN_SIZE;
msi_domain_update_dom_ops(info);
if (info->flags & MSI_FLAG_USE_DEF_CHIP_OPS)
msi_domain_update_chip_ops(info);