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iommu/amd: Fix ill-formed ivrs_ioapic, ivrs_hpet and ivrs_acpihid options 

Currently, these options cause the following libkmod error:

libkmod: ERROR ../libkmod/libkmod-config.c:489 kcmdline_parse_result: \
	Ignoring bad option on kernel command line while parsing module \
	name: 'ivrs_xxxx[XX:XX'

Fix by introducing a new parameter format for these options and
throw a warning for the deprecated format.

Users are still allowed to omit the PCI Segment if zero.

Adding a Link: to the reason why we're modding the syntax parsing
in the driver and not in libkmod.

Fixes: ca3bf5d47c ("iommu/amd: Introduces ivrs_acpihid kernel parameter")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/linux-modules/20200310082308.14318-2-lucas.demarchi@intel.com/
Reported-by: Kim Phillips <kim.phillips@amd.com>
Co-developed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Link: https://lore.kernel.org/r/20220919155638.391481-2-kim.phillips@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Kim Phillips 2022-09-19 10:56:38 -05:00 committed by Joerg Roedel
parent 5f18e9f886
commit 1198d2316d
2 changed files with 75 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
Documentation/admin-guide/kernel-parameters.txt
View File

@ -2300,7 +2300,13 @@
Provide an override to the IOAPIC-ID<->DEVICE-ID
mapping provided in the IVRS ACPI table.
By default, PCI segment is 0, and can be omitted.
For example:
For example, to map IOAPIC-ID decimal 10 to
PCI segment 0x1 and PCI device 00:14.0,
write the parameter as:
ivrs_ioapic=10@0001:00:14.0
Deprecated formats:
* To map IOAPIC-ID decimal 10 to PCI device 00:14.0
write the parameter as:
ivrs_ioapic[10]=00:14.0
@ -2312,7 +2318,13 @@
Provide an override to the HPET-ID<->DEVICE-ID
mapping provided in the IVRS ACPI table.
By default, PCI segment is 0, and can be omitted.
For example:
For example, to map HPET-ID decimal 10 to
PCI segment 0x1 and PCI device 00:14.0,
write the parameter as:
ivrs_hpet=10@0001:00:14.0
Deprecated formats:
* To map HPET-ID decimal 0 to PCI device 00:14.0
write the parameter as:
ivrs_hpet[0]=00:14.0
@ -2323,15 +2335,20 @@
ivrs_acpihid [HW,X86-64]
Provide an override to the ACPI-HID:UID<->DEVICE-ID
mapping provided in the IVRS ACPI table.
By default, PCI segment is 0, and can be omitted.
For example, to map UART-HID:UID AMD0020:0 to
PCI segment 0x1 and PCI device ID 00:14.5,
write the parameter as:
ivrs_acpihid[0001:00:14.5]=AMD0020:0
ivrs_acpihid=AMD0020:0@0001:00:14.5
By default, PCI segment is 0, and can be omitted.
For example, PCI device 00:14.5 write the parameter as:
Deprecated formats:
* To map UART-HID:UID AMD0020:0 to PCI segment is 0,
PCI device ID 00:14.5, write the parameter as:
ivrs_acpihid[00:14.5]=AMD0020:0
* To map UART-HID:UID AMD0020:0 to PCI segment 0x1 and
PCI device ID 00:14.5, write the parameter as:
ivrs_acpihid[0001:00:14.5]=AMD0020:0
js= [HW,JOY] Analog joystick
See Documentation/input/joydev/joystick.rst.

77
drivers/iommu/amd/init.c
View File

@ -3402,18 +3402,24 @@ static int __init parse_amd_iommu_options(char *str)
static int __init parse_ivrs_ioapic(char *str)
{
u32 seg = 0, bus, dev, fn;
int ret, id, i;
int id, i;
u32 devid;
ret = sscanf(str, "[%d]=%x:%x.%x", &id, &bus, &dev, &fn);
if (ret != 4) {
ret = sscanf(str, "[%d]=%x:%x:%x.%x", &id, &seg, &bus, &dev, &fn);
if (ret != 5) {
pr_err("Invalid command line: ivrs_ioapic%s\n", str);
return 1;
}
if (sscanf(str, "=%d@%x:%x.%x", &id, &bus, &dev, &fn) == 4 ||
sscanf(str, "=%d@%x:%x:%x.%x", &id, &seg, &bus, &dev, &fn) == 5)
goto found;
if (sscanf(str, "[%d]=%x:%x.%x", &id, &bus, &dev, &fn) == 4 ||
sscanf(str, "[%d]=%x:%x:%x.%x", &id, &seg, &bus, &dev, &fn) == 5) {
pr_warn("ivrs_ioapic%s option format deprecated; use ivrs_ioapic=%d@%04x:%02x:%02x.%d instead\n",
str, id, seg, bus, dev, fn);
goto found;
}
pr_err("Invalid command line: ivrs_ioapic%s\n", str);
return 1;
found:
if (early_ioapic_map_size == EARLY_MAP_SIZE) {
pr_err("Early IOAPIC map overflow - ignoring ivrs_ioapic%s\n",
str);
@ -3434,18 +3440,24 @@ static int __init parse_ivrs_ioapic(char *str)
static int __init parse_ivrs_hpet(char *str)
{
u32 seg = 0, bus, dev, fn;
int ret, id, i;
int id, i;
u32 devid;
ret = sscanf(str, "[%d]=%x:%x.%x", &id, &bus, &dev, &fn);
if (ret != 4) {
ret = sscanf(str, "[%d]=%x:%x:%x.%x", &id, &seg, &bus, &dev, &fn);
if (ret != 5) {
pr_err("Invalid command line: ivrs_hpet%s\n", str);
return 1;
}
if (sscanf(str, "=%d@%x:%x.%x", &id, &bus, &dev, &fn) == 4 ||
sscanf(str, "=%d@%x:%x:%x.%x", &id, &seg, &bus, &dev, &fn) == 5)
goto found;
if (sscanf(str, "[%d]=%x:%x.%x", &id, &bus, &dev, &fn) == 4 ||
sscanf(str, "[%d]=%x:%x:%x.%x", &id, &seg, &bus, &dev, &fn) == 5) {
pr_warn("ivrs_hpet%s option format deprecated; use ivrs_hpet=%d@%04x:%02x:%02x.%d instead\n",
str, id, seg, bus, dev, fn);
goto found;
}
pr_err("Invalid command line: ivrs_hpet%s\n", str);
return 1;
found:
if (early_hpet_map_size == EARLY_MAP_SIZE) {
pr_err("Early HPET map overflow - ignoring ivrs_hpet%s\n",
str);
@ -3466,19 +3478,36 @@ static int __init parse_ivrs_hpet(char *str)
static int __init parse_ivrs_acpihid(char *str)
{
u32 seg = 0, bus, dev, fn;
char *hid, *uid, *p;
char *hid, *uid, *p, *addr;
char acpiid[ACPIHID_UID_LEN + ACPIHID_HID_LEN] = {0};
int ret, i;
int i;
ret = sscanf(str, "[%x:%x.%x]=%s", &bus, &dev, &fn, acpiid);
if (ret != 4) {
ret = sscanf(str, "[%x:%x:%x.%x]=%s", &seg, &bus, &dev, &fn, acpiid);
if (ret != 5) {
pr_err("Invalid command line: ivrs_acpihid(%s)\n", str);
return 1;
addr = strchr(str, '@');
if (!addr) {
if (sscanf(str, "[%x:%x.%x]=%s", &bus, &dev, &fn, acpiid) == 4 ||
sscanf(str, "[%x:%x:%x.%x]=%s", &seg, &bus, &dev, &fn, acpiid) == 5) {
pr_warn("ivrs_acpihid%s option format deprecated; use ivrs_acpihid=%s@%04x:%02x:%02x.%d instead\n",
str, acpiid, seg, bus, dev, fn);
goto found;
}
goto not_found;
}
/* We have the '@', make it the terminator to get just the acpiid */
*addr++ = 0;
if (sscanf(str, "=%s", acpiid) != 1)
goto not_found;
if (sscanf(addr, "%x:%x.%x", &bus, &dev, &fn) == 3 ||
sscanf(addr, "%x:%x:%x.%x", &seg, &bus, &dev, &fn) == 4)
goto found;
not_found:
pr_err("Invalid command line: ivrs_acpihid%s\n", str);
return 1;
found:
p = acpiid;
hid = strsep(&p, ":");
uid = p;