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iommu/amd: Add PCI segment support for ivrs_[ioapic/hpet/acpihid] commands

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[ Upstream commit bbe3a106580c21bc883fb0c9fa3da01534392fe8 ]

By default, PCI segment is zero and can be omitted. To support system
with non-zero PCI segment ID, modify the parsing functions to allow
PCI segment ID.

Co-developed-by: Vasant Hegde <vasant.hegde@amd.com>
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Link: https://lore.kernel.org/r/20220706113825.25582-33-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Stable-dep-of: b6b26d86c61c ("iommu/amd: Add a length limitation for the ivrs_acpihid command-line parameter")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Suravee Suthikulpanit 2022-07-06 17:08:22 +05:30 committed by Greg Kroah-Hartman
parent 3cdf19a29c
commit 11852cc78f
2 changed files with 52 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
Documentation/admin-guide/kernel-parameters.txt
View File

@ -1944,23 +1944,39 @@
ivrs_ioapic [HW,X86_64]
Provide an override to the IOAPIC-ID<->DEVICE-ID
mapping provided in the IVRS ACPI table. For
example, to map IOAPIC-ID decimal 10 to
PCI device 00:14.0 write the parameter as:
mapping provided in the IVRS ACPI table.
By default, PCI segment is 0, and can be omitted.
For example:
* To map IOAPIC-ID decimal 10 to PCI device 00:14.0
write the parameter as:
ivrs_ioapic[10]=00:14.0
* 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
ivrs_hpet [HW,X86_64]
Provide an override to the HPET-ID<->DEVICE-ID
mapping provided in the IVRS ACPI table. For
example, to map HPET-ID decimal 0 to
PCI device 00:14.0 write the parameter as:
mapping provided in the IVRS ACPI table.
By default, PCI segment is 0, and can be omitted.
For example:
* To map HPET-ID decimal 0 to PCI device 00:14.0
write the parameter as:
ivrs_hpet[0]=00:14.0
* To map HPET-ID decimal 10 to PCI segment 0x1 and
PCI device 00:14.0 write the parameter as:
ivrs_ioapic[10]=0001:00:14.0
ivrs_acpihid [HW,X86_64]
Provide an override to the ACPI-HID:UID<->DEVICE-ID
mapping provided in the IVRS ACPI table. For
example, to map UART-HID:UID AMD0020:0 to
PCI device 00:14.5 write the parameter as:
mapping provided in the IVRS ACPI table.
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
By default, PCI segment is 0, and can be omitted.
For example, PCI device 00:14.5 write the parameter as:
ivrs_acpihid[00:14.5]=AMD0020:0
js= [HW,JOY] Analog joystick

32
drivers/iommu/amd_iommu_init.c
View File

@ -84,6 +84,10 @@
#define ACPI_DEVFLAG_ATSDIS 0x10000000
#define LOOP_TIMEOUT 2000000
#define IVRS_GET_SBDF_ID(seg, bus, dev, fd) (((seg & 0xffff) << 16) | ((bus & 0xff) << 8) \
| ((dev & 0x1f) << 3) | (fn & 0x7))
/*
* ACPI table definitions
*
@ -2971,16 +2975,18 @@ static int __init parse_amd_iommu_options(char *str)
static int __init parse_ivrs_ioapic(char *str)
{
unsigned int bus, dev, fn;
u32 seg = 0, bus, dev, fn;
int ret, id, i;
u16 devid;
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 (early_ioapic_map_size == EARLY_MAP_SIZE) {
pr_err("Early IOAPIC map overflow - ignoring ivrs_ioapic%s\n",
@ -2988,7 +2994,7 @@ static int __init parse_ivrs_ioapic(char *str)
return 1;
}
devid = ((bus & 0xff) << 8) | ((dev & 0x1f) << 3) | (fn & 0x7);
devid = IVRS_GET_SBDF_ID(seg, bus, dev, fn);
cmdline_maps = true;
i = early_ioapic_map_size++;
@ -3001,16 +3007,18 @@ static int __init parse_ivrs_ioapic(char *str)
static int __init parse_ivrs_hpet(char *str)
{
unsigned int bus, dev, fn;
u32 seg = 0, bus, dev, fn;
int ret, id, i;
u16 devid;
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 (early_hpet_map_size == EARLY_MAP_SIZE) {
pr_err("Early HPET map overflow - ignoring ivrs_hpet%s\n",
@ -3018,7 +3026,7 @@ static int __init parse_ivrs_hpet(char *str)
return 1;
}
devid = ((bus & 0xff) << 8) | ((dev & 0x1f) << 3) | (fn & 0x7);
devid = IVRS_GET_SBDF_ID(seg, bus, dev, fn);
cmdline_maps = true;
i = early_hpet_map_size++;
@ -3031,16 +3039,19 @@ static int __init parse_ivrs_hpet(char *str)
static int __init parse_ivrs_acpihid(char *str)
{
u32 bus, dev, fn;
u32 seg = 0, bus, dev, fn;
char *hid, *uid, *p;
char acpiid[ACPIHID_UID_LEN + ACPIHID_HID_LEN] = {0};
int ret, 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;
}
}
p = acpiid;
hid = strsep(&p, ":");
@ -3061,8 +3072,7 @@ static int __init parse_ivrs_acpihid(char *str)
i = early_acpihid_map_size++;
memcpy(early_acpihid_map[i].hid, hid, strlen(hid));
memcpy(early_acpihid_map[i].uid, uid, strlen(uid));
early_acpihid_map[i].devid =
((bus & 0xff) << 8) | ((dev & 0x1f) << 3) | (fn & 0x7);
early_acpihid_map[i].devid = IVRS_GET_SBDF_ID(seg, bus, dev, fn);
early_acpihid_map[i].cmd_line = true;
return 1;