From: Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx> [ 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@xxxxxxx> Signed-off-by: Vasant Hegde <vasant.hegde@xxxxxxx> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx> Link: https://lore.kernel.org/r/20220706113825.25582-33-vasant.hegde@xxxxxxx Signed-off-by: Joerg Roedel <jroedel@xxxxxxx> Stable-dep-of: b6b26d86c61c ("iommu/amd: Add a length limitation for the ivrs_acpihid command-line parameter") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- .../admin-guide/kernel-parameters.txt | 34 ++++++++++---- drivers/iommu/amd_iommu_init.c | 44 ++++++++++++------- 2 files changed, 52 insertions(+), 26 deletions(-) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 8f71a17ad5442..9164263839216 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -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 diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 533b920ed7df2..f4e6173e749a4 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -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 * @@ -2971,15 +2975,17 @@ 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) { - pr_err("Invalid command line: ivrs_ioapic%s\n", str); - return 1; + 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) { @@ -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++; @@ -3001,15 +3007,17 @@ 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) { - pr_err("Invalid command line: ivrs_hpet%s\n", str); - return 1; + 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) { @@ -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++; @@ -3031,15 +3039,18 @@ 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) { - pr_err("Invalid command line: ivrs_acpihid(%s)\n", str); - return 1; + 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; @@ -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; -- 2.39.2
