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anolis: arm64: add extra protective code for kunpeng mpam 

ANBZ: #11194

In order to thoroughly distinguish kunpeng-mpam from yitian-mpam,
add some secure check in entrance of kunpeng-mpam.

Signed-off-by: Min Li <gumi@linux.alibaba.com>
Reviewed-by: Guanghui Feng <guanghuifeng@linux.alibaba.com>
Reviewed-by: Jay Chen <jkchen@linux.alibaba.com>
Reviewed-by: Guixin Liu <kanie@linux.alibaba.com>
Reviewed-by: Xunlei Pang <xlpang@linux.alibaba.com>
Link: https://gitee.com/anolis/cloud-kernel/pulls/4258
This commit is contained in:
Min Li 2024-11-19 20:09:23 +08:00 committed by 小龙
parent e1ccf88ee9
commit 8fc08e6442
2 changed files with 7 additions and 3 deletions
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6
drivers/staging/kunpeng/acpi/mpam.c
View File

@ -230,7 +230,11 @@ int __init acpi_mpam_parse_version(void)
status = acpi_get_table(ACPI_SIG_MPAM, 0, &mpam);
if (ACPI_FAILURE(status))
return -ENOENT;
/* Only pass for hisi */
if (strncmp(mpam->oem_id, "HISI", 4)) {
acpi_put_table(mpam);
return 0;
}
/* PPTT is optional, there may be no mpam cache controls */
acpi_get_table(ACPI_SIG_PPTT, 0, &pptt);
if (ACPI_FAILURE(status))

4
drivers/staging/kunpeng/mpam/mpam_resctrl.c
View File

@ -2175,7 +2175,7 @@ struct rdt_domain *mpam_find_domain(struct resctrl_resource *r, int id,
}
enum mpam_enable_type __read_mostly kunpeng_mpam_enabled;
static int __init mpam_setup(char *str)
static int __init kunpeng_mpam_setup(char *str)
{
if (!strcmp(str, "=acpi"))
kunpeng_mpam_enabled = MPAM_ENABLE_ACPI;
@ -2184,7 +2184,7 @@ static int __init mpam_setup(char *str)
return 1;
}
__setup("mpam", mpam_setup);
__setup("kpmpam", kunpeng_mpam_setup);
int mpam_resctrl_init(void)
{