From: Lu Baolu <baolu.lu@linux.intel.com> To: Joerg Roedel <joro@8bytes.org> Cc: Will Deacon <will@kernel.org>, Yian Chen <yian.chen@intel.com>, Ashok Raj <ashok.raj@intel.com>, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Lu Baolu <baolu.lu@linux.intel.com> Subject: [PATCH v2 2/3] iommu/vt-d: Parse SATC reporting structure Date: Wed, 3 Feb 2021 17:33:27 +0800 [thread overview] Message-ID: <20210203093329.1617808-3-baolu.lu@linux.intel.com> (raw) In-Reply-To: <20210203093329.1617808-1-baolu.lu@linux.intel.com> From: Yian Chen <yian.chen@intel.com> Software should parse every SATC table and all devices in the tables reported by the BIOS and keep the information in kernel list for further reference. Signed-off-by: Yian Chen <yian.chen@intel.com> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> --- drivers/iommu/intel/dmar.c | 8 ++++ drivers/iommu/intel/iommu.c | 89 +++++++++++++++++++++++++++++++++++++ include/linux/dmar.h | 2 + 3 files changed, 99 insertions(+) diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c index 980e8ae090af..d5c51b5c20af 100644 --- a/drivers/iommu/intel/dmar.c +++ b/drivers/iommu/intel/dmar.c @@ -526,6 +526,7 @@ dmar_table_print_dmar_entry(struct acpi_dmar_header *header) struct acpi_dmar_reserved_memory *rmrr; struct acpi_dmar_atsr *atsr; struct acpi_dmar_rhsa *rhsa; + struct acpi_dmar_satc *satc; switch (header->type) { case ACPI_DMAR_TYPE_HARDWARE_UNIT: @@ -555,6 +556,10 @@ dmar_table_print_dmar_entry(struct acpi_dmar_header *header) /* We don't print this here because we need to sanity-check it first. So print it in dmar_parse_one_andd() instead. */ break; + case ACPI_DMAR_TYPE_SATC: + satc = container_of(header, struct acpi_dmar_satc, header); + pr_info("SATC flags: 0x%x\n", satc->flags); + break; } } @@ -642,6 +647,7 @@ parse_dmar_table(void) .cb[ACPI_DMAR_TYPE_ROOT_ATS] = &dmar_parse_one_atsr, .cb[ACPI_DMAR_TYPE_HARDWARE_AFFINITY] = &dmar_parse_one_rhsa, .cb[ACPI_DMAR_TYPE_NAMESPACE] = &dmar_parse_one_andd, + .cb[ACPI_DMAR_TYPE_SATC] = &dmar_parse_one_satc, }; /* @@ -2077,6 +2083,7 @@ static guid_t dmar_hp_guid = #define DMAR_DSM_FUNC_DRHD 1 #define DMAR_DSM_FUNC_ATSR 2 #define DMAR_DSM_FUNC_RHSA 3 +#define DMAR_DSM_FUNC_SATC 4 static inline bool dmar_detect_dsm(acpi_handle handle, int func) { @@ -2094,6 +2101,7 @@ static int dmar_walk_dsm_resource(acpi_handle handle, int func, [DMAR_DSM_FUNC_DRHD] = ACPI_DMAR_TYPE_HARDWARE_UNIT, [DMAR_DSM_FUNC_ATSR] = ACPI_DMAR_TYPE_ROOT_ATS, [DMAR_DSM_FUNC_RHSA] = ACPI_DMAR_TYPE_HARDWARE_AFFINITY, + [DMAR_DSM_FUNC_SATC] = ACPI_DMAR_TYPE_SATC, }; if (!dmar_detect_dsm(handle, func)) diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index ecbd05d8a1fc..ee0932307d64 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -316,8 +316,18 @@ struct dmar_atsr_unit { u8 include_all:1; /* include all ports */ }; +struct dmar_satc_unit { + struct list_head list; /* list of SATC units */ + struct acpi_dmar_header *hdr; /* ACPI header */ + struct dmar_dev_scope *devices; /* target devices */ + struct intel_iommu *iommu; /* the corresponding iommu */ + int devices_cnt; /* target device count */ + u8 atc_required:1; /* ATS is required */ +}; + static LIST_HEAD(dmar_atsr_units); static LIST_HEAD(dmar_rmrr_units); +static LIST_HEAD(dmar_satc_units); #define for_each_rmrr_units(rmrr) \ list_for_each_entry(rmrr, &dmar_rmrr_units, list) @@ -3716,6 +3726,57 @@ int dmar_check_one_atsr(struct acpi_dmar_header *hdr, void *arg) return 0; } +static struct dmar_satc_unit *dmar_find_satc(struct acpi_dmar_satc *satc) +{ + struct dmar_satc_unit *satcu; + struct acpi_dmar_satc *tmp; + + list_for_each_entry_rcu(satcu, &dmar_satc_units, list, + dmar_rcu_check()) { + tmp = (struct acpi_dmar_satc *)satcu->hdr; + if (satc->segment != tmp->segment) + continue; + if (satc->header.length != tmp->header.length) + continue; + if (memcmp(satc, tmp, satc->header.length) == 0) + return satcu; + } + + return NULL; +} + +int dmar_parse_one_satc(struct acpi_dmar_header *hdr, void *arg) +{ + struct acpi_dmar_satc *satc; + struct dmar_satc_unit *satcu; + + if (system_state >= SYSTEM_RUNNING && !intel_iommu_enabled) + return 0; + + satc = container_of(hdr, struct acpi_dmar_satc, header); + satcu = dmar_find_satc(satc); + if (satcu) + return 0; + + satcu = kzalloc(sizeof(*satcu) + hdr->length, GFP_KERNEL); + if (!satcu) + return -ENOMEM; + + satcu->hdr = (void *)(satcu + 1); + memcpy(satcu->hdr, hdr, hdr->length); + satcu->atc_required = satc->flags & 0x1; + satcu->devices = dmar_alloc_dev_scope((void *)(satc + 1), + (void *)satc + satc->header.length, + &satcu->devices_cnt); + if (satcu->devices_cnt && !satcu->devices) { + kfree(satcu); + return -ENOMEM; + } + list_add_rcu(&satcu->list, &dmar_satc_units); + + return 0; +} + static int intel_iommu_add(struct dmar_drhd_unit *dmaru) { int sp, ret; @@ -3823,6 +3884,7 @@ static void intel_iommu_free_dmars(void) { struct dmar_rmrr_unit *rmrru, *rmrr_n; struct dmar_atsr_unit *atsru, *atsr_n; + struct dmar_satc_unit *satcu, *satc_n; list_for_each_entry_safe(rmrru, rmrr_n, &dmar_rmrr_units, list) { list_del(&rmrru->list); @@ -3834,6 +3896,11 @@ static void intel_iommu_free_dmars(void) list_del(&atsru->list); intel_iommu_free_atsr(atsru); } + list_for_each_entry_safe(satcu, satc_n, &dmar_satc_units, list) { + list_del(&satcu->list); + dmar_free_dev_scope(&satcu->devices, &satcu->devices_cnt); + kfree(satcu); + } } int dmar_find_matched_atsr_unit(struct pci_dev *dev) @@ -3885,8 +3952,10 @@ int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info) int ret; struct dmar_rmrr_unit *rmrru; struct dmar_atsr_unit *atsru; + struct dmar_satc_unit *satcu; struct acpi_dmar_atsr *atsr; struct acpi_dmar_reserved_memory *rmrr; + struct acpi_dmar_satc *satc; if (!intel_iommu_enabled && system_state >= SYSTEM_RUNNING) return 0; @@ -3927,6 +3996,23 @@ int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info) break; } } + list_for_each_entry(satcu, &dmar_satc_units, list) { + satc = container_of(satcu->hdr, struct acpi_dmar_satc, header); + if (info->event == BUS_NOTIFY_ADD_DEVICE) { + ret = dmar_insert_dev_scope(info, (void *)(satc + 1), + (void *)satc + satc->header.length, + satc->segment, satcu->devices, + satcu->devices_cnt); + if (ret > 0) + break; + else if (ret < 0) + return ret; + } else if (info->event == BUS_NOTIFY_REMOVED_DEVICE) { + if (dmar_remove_dev_scope(info, satc->segment, + satcu->devices, satcu->devices_cnt)) + break; + } + } return 0; } @@ -4270,6 +4356,9 @@ int __init intel_iommu_init(void) if (list_empty(&dmar_atsr_units)) pr_info("No ATSR found\n"); + if (list_empty(&dmar_satc_units)) + pr_info("No SATC found\n"); + if (dmar_map_gfx) intel_iommu_gfx_mapped = 1; diff --git a/include/linux/dmar.h b/include/linux/dmar.h index 65565820328a..e04436a7ff27 100644 --- a/include/linux/dmar.h +++ b/include/linux/dmar.h @@ -138,6 +138,7 @@ extern void intel_iommu_shutdown(void); extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg); extern int dmar_parse_one_atsr(struct acpi_dmar_header *header, void *arg); extern int dmar_check_one_atsr(struct acpi_dmar_header *hdr, void *arg); +extern int dmar_parse_one_satc(struct acpi_dmar_header *hdr, void *arg); extern int dmar_release_one_atsr(struct acpi_dmar_header *hdr, void *arg); extern int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert); extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info); @@ -149,6 +150,7 @@ static inline void intel_iommu_shutdown(void) { } #define dmar_parse_one_atsr dmar_res_noop #define dmar_check_one_atsr dmar_res_noop #define dmar_release_one_atsr dmar_res_noop +#define dmar_parse_one_satc dmar_res_noop static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info) { -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Lu Baolu <baolu.lu@linux.intel.com> To: Joerg Roedel <joro@8bytes.org> Cc: Ashok Raj <ashok.raj@intel.com>, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Will Deacon <will@kernel.org> Subject: [PATCH v2 2/3] iommu/vt-d: Parse SATC reporting structure Date: Wed, 3 Feb 2021 17:33:27 +0800 [thread overview] Message-ID: <20210203093329.1617808-3-baolu.lu@linux.intel.com> (raw) In-Reply-To: <20210203093329.1617808-1-baolu.lu@linux.intel.com> From: Yian Chen <yian.chen@intel.com> Software should parse every SATC table and all devices in the tables reported by the BIOS and keep the information in kernel list for further reference. Signed-off-by: Yian Chen <yian.chen@intel.com> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> --- drivers/iommu/intel/dmar.c | 8 ++++ drivers/iommu/intel/iommu.c | 89 +++++++++++++++++++++++++++++++++++++ include/linux/dmar.h | 2 + 3 files changed, 99 insertions(+) diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c index 980e8ae090af..d5c51b5c20af 100644 --- a/drivers/iommu/intel/dmar.c +++ b/drivers/iommu/intel/dmar.c @@ -526,6 +526,7 @@ dmar_table_print_dmar_entry(struct acpi_dmar_header *header) struct acpi_dmar_reserved_memory *rmrr; struct acpi_dmar_atsr *atsr; struct acpi_dmar_rhsa *rhsa; + struct acpi_dmar_satc *satc; switch (header->type) { case ACPI_DMAR_TYPE_HARDWARE_UNIT: @@ -555,6 +556,10 @@ dmar_table_print_dmar_entry(struct acpi_dmar_header *header) /* We don't print this here because we need to sanity-check it first. So print it in dmar_parse_one_andd() instead. */ break; + case ACPI_DMAR_TYPE_SATC: + satc = container_of(header, struct acpi_dmar_satc, header); + pr_info("SATC flags: 0x%x\n", satc->flags); + break; } } @@ -642,6 +647,7 @@ parse_dmar_table(void) .cb[ACPI_DMAR_TYPE_ROOT_ATS] = &dmar_parse_one_atsr, .cb[ACPI_DMAR_TYPE_HARDWARE_AFFINITY] = &dmar_parse_one_rhsa, .cb[ACPI_DMAR_TYPE_NAMESPACE] = &dmar_parse_one_andd, + .cb[ACPI_DMAR_TYPE_SATC] = &dmar_parse_one_satc, }; /* @@ -2077,6 +2083,7 @@ static guid_t dmar_hp_guid = #define DMAR_DSM_FUNC_DRHD 1 #define DMAR_DSM_FUNC_ATSR 2 #define DMAR_DSM_FUNC_RHSA 3 +#define DMAR_DSM_FUNC_SATC 4 static inline bool dmar_detect_dsm(acpi_handle handle, int func) { @@ -2094,6 +2101,7 @@ static int dmar_walk_dsm_resource(acpi_handle handle, int func, [DMAR_DSM_FUNC_DRHD] = ACPI_DMAR_TYPE_HARDWARE_UNIT, [DMAR_DSM_FUNC_ATSR] = ACPI_DMAR_TYPE_ROOT_ATS, [DMAR_DSM_FUNC_RHSA] = ACPI_DMAR_TYPE_HARDWARE_AFFINITY, + [DMAR_DSM_FUNC_SATC] = ACPI_DMAR_TYPE_SATC, }; if (!dmar_detect_dsm(handle, func)) diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index ecbd05d8a1fc..ee0932307d64 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -316,8 +316,18 @@ struct dmar_atsr_unit { u8 include_all:1; /* include all ports */ }; +struct dmar_satc_unit { + struct list_head list; /* list of SATC units */ + struct acpi_dmar_header *hdr; /* ACPI header */ + struct dmar_dev_scope *devices; /* target devices */ + struct intel_iommu *iommu; /* the corresponding iommu */ + int devices_cnt; /* target device count */ + u8 atc_required:1; /* ATS is required */ +}; + static LIST_HEAD(dmar_atsr_units); static LIST_HEAD(dmar_rmrr_units); +static LIST_HEAD(dmar_satc_units); #define for_each_rmrr_units(rmrr) \ list_for_each_entry(rmrr, &dmar_rmrr_units, list) @@ -3716,6 +3726,57 @@ int dmar_check_one_atsr(struct acpi_dmar_header *hdr, void *arg) return 0; } +static struct dmar_satc_unit *dmar_find_satc(struct acpi_dmar_satc *satc) +{ + struct dmar_satc_unit *satcu; + struct acpi_dmar_satc *tmp; + + list_for_each_entry_rcu(satcu, &dmar_satc_units, list, + dmar_rcu_check()) { + tmp = (struct acpi_dmar_satc *)satcu->hdr; + if (satc->segment != tmp->segment) + continue; + if (satc->header.length != tmp->header.length) + continue; + if (memcmp(satc, tmp, satc->header.length) == 0) + return satcu; + } + + return NULL; +} + +int dmar_parse_one_satc(struct acpi_dmar_header *hdr, void *arg) +{ + struct acpi_dmar_satc *satc; + struct dmar_satc_unit *satcu; + + if (system_state >= SYSTEM_RUNNING && !intel_iommu_enabled) + return 0; + + satc = container_of(hdr, struct acpi_dmar_satc, header); + satcu = dmar_find_satc(satc); + if (satcu) + return 0; + + satcu = kzalloc(sizeof(*satcu) + hdr->length, GFP_KERNEL); + if (!satcu) + return -ENOMEM; + + satcu->hdr = (void *)(satcu + 1); + memcpy(satcu->hdr, hdr, hdr->length); + satcu->atc_required = satc->flags & 0x1; + satcu->devices = dmar_alloc_dev_scope((void *)(satc + 1), + (void *)satc + satc->header.length, + &satcu->devices_cnt); + if (satcu->devices_cnt && !satcu->devices) { + kfree(satcu); + return -ENOMEM; + } + list_add_rcu(&satcu->list, &dmar_satc_units); + + return 0; +} + static int intel_iommu_add(struct dmar_drhd_unit *dmaru) { int sp, ret; @@ -3823,6 +3884,7 @@ static void intel_iommu_free_dmars(void) { struct dmar_rmrr_unit *rmrru, *rmrr_n; struct dmar_atsr_unit *atsru, *atsr_n; + struct dmar_satc_unit *satcu, *satc_n; list_for_each_entry_safe(rmrru, rmrr_n, &dmar_rmrr_units, list) { list_del(&rmrru->list); @@ -3834,6 +3896,11 @@ static void intel_iommu_free_dmars(void) list_del(&atsru->list); intel_iommu_free_atsr(atsru); } + list_for_each_entry_safe(satcu, satc_n, &dmar_satc_units, list) { + list_del(&satcu->list); + dmar_free_dev_scope(&satcu->devices, &satcu->devices_cnt); + kfree(satcu); + } } int dmar_find_matched_atsr_unit(struct pci_dev *dev) @@ -3885,8 +3952,10 @@ int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info) int ret; struct dmar_rmrr_unit *rmrru; struct dmar_atsr_unit *atsru; + struct dmar_satc_unit *satcu; struct acpi_dmar_atsr *atsr; struct acpi_dmar_reserved_memory *rmrr; + struct acpi_dmar_satc *satc; if (!intel_iommu_enabled && system_state >= SYSTEM_RUNNING) return 0; @@ -3927,6 +3996,23 @@ int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info) break; } } + list_for_each_entry(satcu, &dmar_satc_units, list) { + satc = container_of(satcu->hdr, struct acpi_dmar_satc, header); + if (info->event == BUS_NOTIFY_ADD_DEVICE) { + ret = dmar_insert_dev_scope(info, (void *)(satc + 1), + (void *)satc + satc->header.length, + satc->segment, satcu->devices, + satcu->devices_cnt); + if (ret > 0) + break; + else if (ret < 0) + return ret; + } else if (info->event == BUS_NOTIFY_REMOVED_DEVICE) { + if (dmar_remove_dev_scope(info, satc->segment, + satcu->devices, satcu->devices_cnt)) + break; + } + } return 0; } @@ -4270,6 +4356,9 @@ int __init intel_iommu_init(void) if (list_empty(&dmar_atsr_units)) pr_info("No ATSR found\n"); + if (list_empty(&dmar_satc_units)) + pr_info("No SATC found\n"); + if (dmar_map_gfx) intel_iommu_gfx_mapped = 1; diff --git a/include/linux/dmar.h b/include/linux/dmar.h index 65565820328a..e04436a7ff27 100644 --- a/include/linux/dmar.h +++ b/include/linux/dmar.h @@ -138,6 +138,7 @@ extern void intel_iommu_shutdown(void); extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg); extern int dmar_parse_one_atsr(struct acpi_dmar_header *header, void *arg); extern int dmar_check_one_atsr(struct acpi_dmar_header *hdr, void *arg); +extern int dmar_parse_one_satc(struct acpi_dmar_header *hdr, void *arg); extern int dmar_release_one_atsr(struct acpi_dmar_header *hdr, void *arg); extern int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert); extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info); @@ -149,6 +150,7 @@ static inline void intel_iommu_shutdown(void) { } #define dmar_parse_one_atsr dmar_res_noop #define dmar_check_one_atsr dmar_res_noop #define dmar_release_one_atsr dmar_res_noop +#define dmar_parse_one_satc dmar_res_noop static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info) { -- 2.25.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2021-02-03 9:44 UTC|newest] Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-02-03 9:33 [PATCH v2 0/3] iommu/vt-d: Add support for ACPI/SATC table Lu Baolu 2021-02-03 9:33 ` Lu Baolu 2021-02-03 9:33 ` [PATCH v2 1/3] iommu/vt-d: Add new enum value and structure for SATC Lu Baolu 2021-02-03 9:33 ` Lu Baolu 2021-02-03 9:33 ` Lu Baolu [this message] 2021-02-03 9:33 ` [PATCH v2 2/3] iommu/vt-d: Parse SATC reporting structure Lu Baolu 2021-02-03 9:33 ` [PATCH v2 3/3] iommu/vt-d: Apply SATC policy Lu Baolu 2021-02-03 9:33 ` Lu Baolu 2021-02-04 1:59 ` Tian, Kevin 2021-02-04 1:59 ` Tian, Kevin 2021-02-04 2:13 ` Lu Baolu 2021-02-04 2:13 ` Lu Baolu 2021-02-03 9:48 ` [PATCH v2 0/3] iommu/vt-d: Add support for ACPI/SATC table Lu Baolu 2021-02-03 9:48 ` Lu Baolu
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