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xen.27494
5d417813-AMD-IOMMU-bitfield-extended-features.p...
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File 5d417813-AMD-IOMMU-bitfield-extended-features.patch of Package xen.27494
References: bsc#1135799 # Commit c69363b2ac7e5ed88908a304e6903f5842c9805e # Date 2019-07-31 13:14:27 +0200 # Author Jan Beulich <jbeulich@suse.com> # Committer Jan Beulich <jbeulich@suse.com> AMD/IOMMU: use bit field for extended feature register This also takes care of several of the shift values wrongly having been specified as hex rather than dec. Take the opportunity and - replace a readl() pair by a single readq(), - add further fields. Signed-off-by: Jan Beulich <jbeulich@suse.com> Acked-by: Andrew Cooper <andrew.cooper3@citrix.com> Acked-by: Brian Woods <brian.woods@amd.com> --- a/xen/drivers/passthrough/amd/iommu_detect.c +++ b/xen/drivers/passthrough/amd/iommu_detect.c @@ -60,49 +60,76 @@ static int __init get_iommu_capabilities void __init get_iommu_features(struct amd_iommu *iommu) { - u32 low, high; - int i = 0 ; const struct amd_iommu *first; - static const char *__initdata feature_str[] = { - "- Prefetch Pages Command", - "- Peripheral Page Service Request", - "- X2APIC Supported", - "- NX bit Supported", - "- Guest Translation", - "- Reserved bit [5]", - "- Invalidate All Command", - "- Guest APIC supported", - "- Hardware Error Registers", - "- Performance Counters", - NULL - }; - ASSERT( iommu->mmio_base ); if ( !iommu_has_cap(iommu, PCI_CAP_EFRSUP_SHIFT) ) { - iommu->features = 0; + iommu->features.raw = 0; return; } - low = readl(iommu->mmio_base + IOMMU_EXT_FEATURE_MMIO_OFFSET); - high = readl(iommu->mmio_base + IOMMU_EXT_FEATURE_MMIO_OFFSET + 4); - - iommu->features = ((u64)high << 32) | low; + iommu->features.raw = + readq(iommu->mmio_base + IOMMU_EXT_FEATURE_MMIO_OFFSET); /* Don't log the same set of features over and over. */ first = list_first_entry(&amd_iommu_head, struct amd_iommu, list); - if ( iommu != first && iommu->features == first->features ) + if ( iommu != first && iommu->features.raw == first->features.raw ) return; printk("AMD-Vi: IOMMU Extended Features:\n"); - while ( feature_str[i] ) +#define FEAT(fld, str) do { \ + if ( --((union amd_iommu_ext_features){}).flds.fld > 1 ) \ + printk( "- " str ": %#x\n", iommu->features.flds.fld); \ + else if ( iommu->features.flds.fld ) \ + printk( "- " str "\n"); \ +} while ( false ) + + FEAT(pref_sup, "Prefetch Pages Command"); + FEAT(ppr_sup, "Peripheral Page Service Request"); + FEAT(xt_sup, "x2APIC"); + FEAT(nx_sup, "NX bit"); + FEAT(gappi_sup, "Guest APIC Physical Processor Interrupt"); + FEAT(ia_sup, "Invalidate All Command"); + FEAT(ga_sup, "Guest APIC"); + FEAT(he_sup, "Hardware Error Registers"); + FEAT(pc_sup, "Performance Counters"); + FEAT(hats, "Host Address Translation Size"); + + if ( iommu->features.flds.gt_sup ) { - if ( amd_iommu_has_feature(iommu, i) ) - printk( " %s\n", feature_str[i]); - i++; + FEAT(gats, "Guest Address Translation Size"); + FEAT(glx_sup, "Guest CR3 Root Table Level"); + FEAT(pas_max, "Maximum PASID"); } + + FEAT(smif_sup, "SMI Filter Register"); + FEAT(smif_rc, "SMI Filter Register Count"); + FEAT(gam_sup, "Guest Virtual APIC Modes"); + FEAT(dual_ppr_log_sup, "Dual PPR Log"); + FEAT(dual_event_log_sup, "Dual Event Log"); + FEAT(sats_sup, "Secure ATS"); + FEAT(us_sup, "User / Supervisor Page Protection"); + FEAT(dev_tbl_seg_sup, "Device Table Segmentation"); + FEAT(ppr_early_of_sup, "PPR Log Overflow Early Warning"); + FEAT(ppr_auto_rsp_sup, "PPR Automatic Response"); + FEAT(marc_sup, "Memory Access Routing and Control"); + FEAT(blk_stop_mrk_sup, "Block StopMark Message"); + FEAT(perf_opt_sup , "Performance Optimization"); + FEAT(msi_cap_mmio_sup, "MSI Capability MMIO Access"); + FEAT(gio_sup, "Guest I/O Protection"); + FEAT(ha_sup, "Host Access"); + FEAT(eph_sup, "Enhanced PPR Handling"); + FEAT(attr_fw_sup, "Attribute Forward"); + FEAT(hd_sup, "Host Dirty"); + FEAT(inv_iotlb_type_sup, "Invalidate IOTLB Type"); + FEAT(viommu_sup, "Virtualized IOMMU"); + FEAT(vm_guard_io_sup, "VMGuard I/O Support"); + FEAT(vm_table_size, "VM Table Size"); + FEAT(ga_update_dis_sup, "Guest Access Bit Update Disable"); + +#undef FEAT } int __init amd_iommu_detect_one_acpi( --- a/xen/drivers/passthrough/amd/iommu_guest.c +++ b/xen/drivers/passthrough/amd/iommu_guest.c @@ -667,7 +667,7 @@ static uint64_t iommu_mmio_read64(struct val = reg_to_u64(iommu->reg_status); break; case IOMMU_EXT_FEATURE_MMIO_OFFSET: - val = reg_to_u64(iommu->reg_ext_feature); + val = iommu->reg_ext_feature.raw; break; default: @@ -831,39 +831,26 @@ int guest_iommu_set_base(struct domain * /* Initialize mmio read only bits */ static void guest_iommu_reg_init(struct guest_iommu *iommu) { - uint32_t lower, upper; + union amd_iommu_ext_features ef = { + /* Support prefetch */ + .flds.pref_sup = 1, + /* Support PPR log */ + .flds.ppr_sup = 1, + /* Support guest translation */ + .flds.gt_sup = 1, + /* Support invalidate all command */ + .flds.ia_sup = 1, + /* Host translation size has 6 levels */ + .flds.hats = HOST_ADDRESS_SIZE_6_LEVEL, + /* Guest translation size has 6 levels */ + .flds.gats = GUEST_ADDRESS_SIZE_6_LEVEL, + /* Single level gCR3 */ + .flds.glx_sup = GUEST_CR3_1_LEVEL, + /* 9 bit PASID */ + .flds.pas_max = PASMAX_9_bit, + }; - lower = upper = 0; - /* Support prefetch */ - iommu_set_bit(&lower,IOMMU_EXT_FEATURE_PREFSUP_SHIFT); - /* Support PPR log */ - iommu_set_bit(&lower,IOMMU_EXT_FEATURE_PPRSUP_SHIFT); - /* Support guest translation */ - iommu_set_bit(&lower,IOMMU_EXT_FEATURE_GTSUP_SHIFT); - /* Support invalidate all command */ - iommu_set_bit(&lower,IOMMU_EXT_FEATURE_IASUP_SHIFT); - - /* Host translation size has 6 levels */ - set_field_in_reg_u32(HOST_ADDRESS_SIZE_6_LEVEL, lower, - IOMMU_EXT_FEATURE_HATS_MASK, - IOMMU_EXT_FEATURE_HATS_SHIFT, - &lower); - /* Guest translation size has 6 levels */ - set_field_in_reg_u32(GUEST_ADDRESS_SIZE_6_LEVEL, lower, - IOMMU_EXT_FEATURE_GATS_MASK, - IOMMU_EXT_FEATURE_GATS_SHIFT, - &lower); - /* Single level gCR3 */ - set_field_in_reg_u32(GUEST_CR3_1_LEVEL, lower, - IOMMU_EXT_FEATURE_GLXSUP_MASK, - IOMMU_EXT_FEATURE_GLXSUP_SHIFT, &lower); - /* 9 bit PASID */ - set_field_in_reg_u32(PASMAX_9_bit, upper, - IOMMU_EXT_FEATURE_PASMAX_MASK, - IOMMU_EXT_FEATURE_PASMAX_SHIFT, &upper); - - iommu->reg_ext_feature.lo = lower; - iommu->reg_ext_feature.hi = upper; + iommu->reg_ext_feature = ef; } static int guest_iommu_mmio_range(struct vcpu *v, unsigned long addr) --- a/xen/drivers/passthrough/amd/iommu_init.c +++ b/xen/drivers/passthrough/amd/iommu_init.c @@ -883,7 +883,7 @@ static void enable_iommu(struct amd_iomm register_iommu_event_log_in_mmio_space(iommu); register_iommu_exclusion_range(iommu); - if ( amd_iommu_has_feature(iommu, IOMMU_EXT_FEATURE_PPRSUP_SHIFT) ) + if ( iommu->features.flds.ppr_sup ) register_iommu_ppr_log_in_mmio_space(iommu); desc = irq_to_desc(iommu->msi.irq); @@ -897,15 +897,15 @@ static void enable_iommu(struct amd_iomm set_iommu_command_buffer_control(iommu, IOMMU_CONTROL_ENABLED); set_iommu_event_log_control(iommu, IOMMU_CONTROL_ENABLED); - if ( amd_iommu_has_feature(iommu, IOMMU_EXT_FEATURE_PPRSUP_SHIFT) ) + if ( iommu->features.flds.ppr_sup ) set_iommu_ppr_log_control(iommu, IOMMU_CONTROL_ENABLED); - if ( amd_iommu_has_feature(iommu, IOMMU_EXT_FEATURE_GTSUP_SHIFT) ) + if ( iommu->features.flds.gt_sup ) set_iommu_guest_translation_control(iommu, IOMMU_CONTROL_ENABLED); set_iommu_translation_control(iommu, IOMMU_CONTROL_ENABLED); - if ( amd_iommu_has_feature(iommu, IOMMU_EXT_FEATURE_IASUP_SHIFT) ) + if ( iommu->features.flds.ia_sup ) amd_iommu_flush_all_caches(iommu); iommu->enabled = 1; @@ -928,10 +928,10 @@ static void disable_iommu(struct amd_iom set_iommu_command_buffer_control(iommu, IOMMU_CONTROL_DISABLED); set_iommu_event_log_control(iommu, IOMMU_CONTROL_DISABLED); - if ( amd_iommu_has_feature(iommu, IOMMU_EXT_FEATURE_PPRSUP_SHIFT) ) + if ( iommu->features.flds.ppr_sup ) set_iommu_ppr_log_control(iommu, IOMMU_CONTROL_DISABLED); - if ( amd_iommu_has_feature(iommu, IOMMU_EXT_FEATURE_GTSUP_SHIFT) ) + if ( iommu->features.flds.gt_sup ) set_iommu_guest_translation_control(iommu, IOMMU_CONTROL_DISABLED); set_iommu_translation_control(iommu, IOMMU_CONTROL_DISABLED); @@ -1051,7 +1051,7 @@ static int __init amd_iommu_init_one(str get_iommu_features(iommu); - if ( iommu->features ) + if ( iommu->features.raw ) iommuv2_enabled = 1; if ( allocate_cmd_buffer(iommu) == NULL ) @@ -1060,9 +1060,8 @@ static int __init amd_iommu_init_one(str if ( allocate_event_log(iommu) == NULL ) goto error_out; - if ( amd_iommu_has_feature(iommu, IOMMU_EXT_FEATURE_PPRSUP_SHIFT) ) - if ( allocate_ppr_log(iommu) == NULL ) - goto error_out; + if ( iommu->features.flds.ppr_sup && !allocate_ppr_log(iommu) ) + goto error_out; if ( !set_iommu_interrupt_handler(iommu) ) goto error_out; @@ -1417,7 +1416,7 @@ void amd_iommu_resume(void) } /* flush all cache entries after iommu re-enabled */ - if ( !amd_iommu_has_feature(iommu, IOMMU_EXT_FEATURE_IASUP_SHIFT) ) + if ( !iommu->features.flds.ia_sup ) { invalidate_all_devices(); invalidate_all_domain_pages(); --- a/xen/include/asm-x86/amd-iommu.h +++ b/xen/include/asm-x86/amd-iommu.h @@ -88,7 +88,7 @@ struct amd_iommu { iommu_cap_t cap; u8 ht_flags; - u64 features; + union amd_iommu_ext_features features; void *mmio_base; unsigned long mmio_base_phys; @@ -185,7 +185,7 @@ struct guest_iommu { /* MMIO regs */ struct mmio_reg reg_ctrl; /* MMIO offset 0018h */ struct mmio_reg reg_status; /* MMIO offset 2020h */ - struct mmio_reg reg_ext_feature; /* MMIO offset 0030h */ + union amd_iommu_ext_features reg_ext_feature; /* MMIO offset 0030h */ /* guest interrupt settings */ struct guest_iommu_msi msi; --- a/xen/include/asm-x86/hvm/svm/amd-iommu-defs.h +++ b/xen/include/asm-x86/hvm/svm/amd-iommu-defs.h @@ -361,26 +361,57 @@ #define IOMMU_EXCLUSION_LIMIT_HIGH_MASK 0xFFFFFFFF #define IOMMU_EXCLUSION_LIMIT_HIGH_SHIFT 0 -/* Extended Feature Register*/ +/* Extended Feature Register */ #define IOMMU_EXT_FEATURE_MMIO_OFFSET 0x30 -#define IOMMU_EXT_FEATURE_PREFSUP_SHIFT 0x0 -#define IOMMU_EXT_FEATURE_PPRSUP_SHIFT 0x1 -#define IOMMU_EXT_FEATURE_XTSUP_SHIFT 0x2 -#define IOMMU_EXT_FEATURE_NXSUP_SHIFT 0x3 -#define IOMMU_EXT_FEATURE_GTSUP_SHIFT 0x4 -#define IOMMU_EXT_FEATURE_IASUP_SHIFT 0x6 -#define IOMMU_EXT_FEATURE_GASUP_SHIFT 0x7 -#define IOMMU_EXT_FEATURE_HESUP_SHIFT 0x8 -#define IOMMU_EXT_FEATURE_PCSUP_SHIFT 0x9 -#define IOMMU_EXT_FEATURE_HATS_SHIFT 0x10 -#define IOMMU_EXT_FEATURE_HATS_MASK 0x00000C00 -#define IOMMU_EXT_FEATURE_GATS_SHIFT 0x12 -#define IOMMU_EXT_FEATURE_GATS_MASK 0x00003000 -#define IOMMU_EXT_FEATURE_GLXSUP_SHIFT 0x14 -#define IOMMU_EXT_FEATURE_GLXSUP_MASK 0x0000C000 -#define IOMMU_EXT_FEATURE_PASMAX_SHIFT 0x0 -#define IOMMU_EXT_FEATURE_PASMAX_MASK 0x0000001F +union amd_iommu_ext_features { + uint64_t raw; + struct { + unsigned int pref_sup:1; + unsigned int ppr_sup:1; + unsigned int xt_sup:1; + unsigned int nx_sup:1; + unsigned int gt_sup:1; + unsigned int gappi_sup:1; + unsigned int ia_sup:1; + unsigned int ga_sup:1; + unsigned int he_sup:1; + unsigned int pc_sup:1; + unsigned int hats:2; + unsigned int gats:2; + unsigned int glx_sup:2; + unsigned int smif_sup:2; + unsigned int smif_rc:3; + unsigned int gam_sup:3; + unsigned int dual_ppr_log_sup:2; + unsigned int :2; + unsigned int dual_event_log_sup:2; + unsigned int :1; + unsigned int sats_sup:1; + unsigned int pas_max:5; + unsigned int us_sup:1; + unsigned int dev_tbl_seg_sup:2; + unsigned int ppr_early_of_sup:1; + unsigned int ppr_auto_rsp_sup:1; + unsigned int marc_sup:2; + unsigned int blk_stop_mrk_sup:1; + unsigned int perf_opt_sup:1; + unsigned int msi_cap_mmio_sup:1; + unsigned int :1; + unsigned int gio_sup:1; + unsigned int ha_sup:1; + unsigned int eph_sup:1; + unsigned int attr_fw_sup:1; + unsigned int hd_sup:1; + unsigned int :1; + unsigned int inv_iotlb_type_sup:1; + unsigned int viommu_sup:1; + unsigned int vm_guard_io_sup:1; + unsigned int vm_table_size:4; + unsigned int ga_update_dis_sup:1; + unsigned int :2; + } flds; +}; /* Status Register*/ #define IOMMU_STATUS_MMIO_OFFSET 0x2020 --- a/xen/include/asm-x86/hvm/svm/amd-iommu-proto.h +++ b/xen/include/asm-x86/hvm/svm/amd-iommu-proto.h @@ -247,13 +247,6 @@ static inline int iommu_has_cap(struct a return !!(iommu->cap.header & (1u << bit)); } -static inline int amd_iommu_has_feature(struct amd_iommu *iommu, uint32_t bit) -{ - if ( !iommu_has_cap(iommu, PCI_CAP_EFRSUP_SHIFT) ) - return 0; - return !!(iommu->features & (1U << bit)); -} - /* access tail or head pointer of ring buffer */ static inline uint32_t iommu_get_rb_pointer(uint32_t reg) {
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