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No build reason found for pool-leap-15.4:ppc64le
SUSE:SLE-15-SP1:Update
xen.26343
5d417838-AMD-IOMMU-bitfield-control-reg.patch
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File 5d417838-AMD-IOMMU-bitfield-control-reg.patch of Package xen.26343
References: bsc#1135799 # Commit 08344ec71cad07829855fb7927faaafd26189798 # Date 2019-07-31 13:15:04 +0200 # Author Jan Beulich <jbeulich@suse.com> # Committer Jan Beulich <jbeulich@suse.com> AMD/IOMMU: use bit field for control register Also introduce a field in struct amd_iommu caching the most recently written control register. All writes should now happen exclusively from that cached value, such that it is guaranteed to be up to date. Take the opportunity and add further fields. Also convert a few boolean function parameters to bool, such that use of !! can be avoided. Because of there now being definitions beyond bit 31, writel() also gets replaced by writeq() when updating hardware. 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_guest.c +++ b/xen/drivers/passthrough/amd/iommu_guest.c @@ -346,7 +346,7 @@ static int do_invalidate_iotlb_pages(str static int do_completion_wait(struct domain *d, cmd_entry_t *cmd) { - bool_t com_wait_int_en, com_wait_int, i, s; + bool com_wait_int, i, s; struct guest_iommu *iommu; unsigned long gfn; p2m_type_t p2mt; @@ -383,12 +383,10 @@ static int do_completion_wait(struct dom unmap_domain_page(vaddr); } - com_wait_int_en = iommu_get_bit(iommu->reg_ctrl.lo, - IOMMU_CONTROL_COMP_WAIT_INT_SHIFT); com_wait_int = iommu_get_bit(iommu->reg_status.lo, IOMMU_STATUS_COMP_WAIT_INT_SHIFT); - if ( com_wait_int_en && com_wait_int ) + if ( iommu->reg_ctrl.com_wait_int_en && com_wait_int ) guest_iommu_deliver_msi(d); return 0; @@ -550,40 +548,17 @@ static void guest_iommu_process_command( return; } -static int guest_iommu_write_ctrl(struct guest_iommu *iommu, uint64_t newctrl) +static int guest_iommu_write_ctrl(struct guest_iommu *iommu, uint64_t val) { - bool_t cmd_en, event_en, iommu_en, ppr_en, ppr_log_en; - bool_t cmd_en_old, event_en_old, iommu_en_old; - bool_t cmd_run; - - iommu_en = iommu_get_bit(newctrl, - IOMMU_CONTROL_TRANSLATION_ENABLE_SHIFT); - iommu_en_old = iommu_get_bit(iommu->reg_ctrl.lo, - IOMMU_CONTROL_TRANSLATION_ENABLE_SHIFT); - - cmd_en = iommu_get_bit(newctrl, - IOMMU_CONTROL_COMMAND_BUFFER_ENABLE_SHIFT); - cmd_en_old = iommu_get_bit(iommu->reg_ctrl.lo, - IOMMU_CONTROL_COMMAND_BUFFER_ENABLE_SHIFT); - cmd_run = iommu_get_bit(iommu->reg_status.lo, - IOMMU_STATUS_CMD_BUFFER_RUN_SHIFT); - event_en = iommu_get_bit(newctrl, - IOMMU_CONTROL_EVENT_LOG_ENABLE_SHIFT); - event_en_old = iommu_get_bit(iommu->reg_ctrl.lo, - IOMMU_CONTROL_EVENT_LOG_ENABLE_SHIFT); - - ppr_en = iommu_get_bit(newctrl, - IOMMU_CONTROL_PPR_ENABLE_SHIFT); - ppr_log_en = iommu_get_bit(newctrl, - IOMMU_CONTROL_PPR_LOG_ENABLE_SHIFT); + union amd_iommu_control newctrl = { .raw = val }; - if ( iommu_en ) + if ( newctrl.iommu_en ) { guest_iommu_enable(iommu); guest_iommu_enable_dev_table(iommu); } - if ( iommu_en && cmd_en ) + if ( newctrl.iommu_en && newctrl.cmd_buf_en ) { guest_iommu_enable_ring_buffer(iommu, &iommu->cmd_buffer, sizeof(cmd_entry_t)); @@ -591,7 +566,7 @@ static int guest_iommu_write_ctrl(struct tasklet_schedule(&iommu->cmd_buffer_tasklet); } - if ( iommu_en && event_en ) + if ( newctrl.iommu_en && newctrl.event_log_en ) { guest_iommu_enable_ring_buffer(iommu, &iommu->event_log, sizeof(event_entry_t)); @@ -599,7 +574,7 @@ static int guest_iommu_write_ctrl(struct guest_iommu_clear_status(iommu, IOMMU_STATUS_EVENT_OVERFLOW_SHIFT); } - if ( iommu_en && ppr_en && ppr_log_en ) + if ( newctrl.iommu_en && newctrl.ppr_en && newctrl.ppr_log_en ) { guest_iommu_enable_ring_buffer(iommu, &iommu->ppr_log, sizeof(ppr_entry_t)); @@ -607,19 +582,21 @@ static int guest_iommu_write_ctrl(struct guest_iommu_clear_status(iommu, IOMMU_STATUS_PPR_LOG_OVERFLOW_SHIFT); } - if ( iommu_en && cmd_en_old && !cmd_en ) + if ( newctrl.iommu_en && iommu->reg_ctrl.cmd_buf_en && + !newctrl.cmd_buf_en ) { /* Disable iommu command processing */ tasklet_kill(&iommu->cmd_buffer_tasklet); } - if ( event_en_old && !event_en ) + if ( iommu->reg_ctrl.event_log_en && !newctrl.event_log_en ) guest_iommu_clear_status(iommu, IOMMU_STATUS_EVENT_LOG_RUN_SHIFT); - if ( iommu_en_old && !iommu_en ) + if ( iommu->reg_ctrl.iommu_en && !newctrl.iommu_en ) guest_iommu_disable(iommu); - u64_to_reg(&iommu->reg_ctrl, newctrl); + iommu->reg_ctrl = newctrl; + return 0; } @@ -661,7 +638,7 @@ static uint64_t iommu_mmio_read64(struct val = reg_to_u64(iommu->ppr_log.reg_tail); break; case IOMMU_CONTROL_MMIO_OFFSET: - val = reg_to_u64(iommu->reg_ctrl); + val = iommu->reg_ctrl.raw; break; case IOMMU_STATUS_MMIO_OFFSET: val = reg_to_u64(iommu->reg_status); --- a/xen/drivers/passthrough/amd/iommu_init.c +++ b/xen/drivers/passthrough/amd/iommu_init.c @@ -41,7 +41,7 @@ LIST_HEAD_READ_MOSTLY(amd_iommu_head); struct table_struct device_table; bool_t iommuv2_enabled; -static int iommu_has_ht_flag(struct amd_iommu *iommu, u8 mask) +static bool iommu_has_ht_flag(struct amd_iommu *iommu, u8 mask) { return iommu->ht_flags & mask; } @@ -69,31 +69,18 @@ static void __init unmap_iommu_mmio_regi static void set_iommu_ht_flags(struct amd_iommu *iommu) { - u32 entry; - entry = readl(iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); - /* Setup HT flags */ if ( iommu_has_cap(iommu, PCI_CAP_HT_TUNNEL_SHIFT) ) - iommu_has_ht_flag(iommu, ACPI_IVHD_TT_ENABLE) ? - iommu_set_bit(&entry, IOMMU_CONTROL_HT_TUNNEL_TRANSLATION_SHIFT) : - iommu_clear_bit(&entry, IOMMU_CONTROL_HT_TUNNEL_TRANSLATION_SHIFT); - - iommu_has_ht_flag(iommu, ACPI_IVHD_RES_PASS_PW) ? - iommu_set_bit(&entry, IOMMU_CONTROL_RESP_PASS_POSTED_WRITE_SHIFT): - iommu_clear_bit(&entry, IOMMU_CONTROL_RESP_PASS_POSTED_WRITE_SHIFT); - - iommu_has_ht_flag(iommu, ACPI_IVHD_ISOC) ? - iommu_set_bit(&entry, IOMMU_CONTROL_ISOCHRONOUS_SHIFT): - iommu_clear_bit(&entry, IOMMU_CONTROL_ISOCHRONOUS_SHIFT); - - iommu_has_ht_flag(iommu, ACPI_IVHD_PASS_PW) ? - iommu_set_bit(&entry, IOMMU_CONTROL_PASS_POSTED_WRITE_SHIFT): - iommu_clear_bit(&entry, IOMMU_CONTROL_PASS_POSTED_WRITE_SHIFT); + iommu->ctrl.ht_tun_en = iommu_has_ht_flag(iommu, ACPI_IVHD_TT_ENABLE); + + iommu->ctrl.pass_pw = iommu_has_ht_flag(iommu, ACPI_IVHD_PASS_PW); + iommu->ctrl.res_pass_pw = iommu_has_ht_flag(iommu, ACPI_IVHD_RES_PASS_PW); + iommu->ctrl.isoc = iommu_has_ht_flag(iommu, ACPI_IVHD_ISOC); /* Force coherent */ - iommu_set_bit(&entry, IOMMU_CONTROL_COHERENT_SHIFT); + iommu->ctrl.coherent = true; - writel(entry, iommu->mmio_base+IOMMU_CONTROL_MMIO_OFFSET); + writeq(iommu->ctrl.raw, iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); } static void register_iommu_dev_table_in_mmio_space(struct amd_iommu *iommu) @@ -205,55 +192,37 @@ static void register_iommu_ppr_log_in_mm static void set_iommu_translation_control(struct amd_iommu *iommu, - int enable) + bool enable) { - u32 entry; + iommu->ctrl.iommu_en = enable; - entry = readl(iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); - - enable ? - iommu_set_bit(&entry, IOMMU_CONTROL_TRANSLATION_ENABLE_SHIFT) : - iommu_clear_bit(&entry, IOMMU_CONTROL_TRANSLATION_ENABLE_SHIFT); - - writel(entry, iommu->mmio_base+IOMMU_CONTROL_MMIO_OFFSET); + writeq(iommu->ctrl.raw, iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); } static void set_iommu_guest_translation_control(struct amd_iommu *iommu, - int enable) + bool enable) { - u32 entry; - - entry = readl(iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); + iommu->ctrl.gt_en = enable; - enable ? - iommu_set_bit(&entry, IOMMU_CONTROL_GT_ENABLE_SHIFT) : - iommu_clear_bit(&entry, IOMMU_CONTROL_GT_ENABLE_SHIFT); - - writel(entry, iommu->mmio_base+IOMMU_CONTROL_MMIO_OFFSET); + writeq(iommu->ctrl.raw, iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); if ( enable ) AMD_IOMMU_DEBUG("Guest Translation Enabled.\n"); } static void set_iommu_command_buffer_control(struct amd_iommu *iommu, - int enable) + bool enable) { - u32 entry; - - entry = readl(iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); - - /*reset head and tail pointer manually before enablement */ + /* Reset head and tail pointer manually before enablement */ if ( enable ) { writeq(0, iommu->mmio_base + IOMMU_CMD_BUFFER_HEAD_OFFSET); writeq(0, iommu->mmio_base + IOMMU_CMD_BUFFER_TAIL_OFFSET); - - iommu_set_bit(&entry, IOMMU_CONTROL_COMMAND_BUFFER_ENABLE_SHIFT); } - else - iommu_clear_bit(&entry, IOMMU_CONTROL_COMMAND_BUFFER_ENABLE_SHIFT); - writel(entry, iommu->mmio_base+IOMMU_CONTROL_MMIO_OFFSET); + iommu->ctrl.cmd_buf_en = enable; + + writeq(iommu->ctrl.raw, iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); } static void register_iommu_exclusion_range(struct amd_iommu *iommu) @@ -295,57 +264,38 @@ static void register_iommu_exclusion_ran } static void set_iommu_event_log_control(struct amd_iommu *iommu, - int enable) + bool enable) { - u32 entry; - - entry = readl(iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); - - /*reset head and tail pointer manually before enablement */ + /* Reset head and tail pointer manually before enablement */ if ( enable ) { writeq(0, iommu->mmio_base + IOMMU_EVENT_LOG_HEAD_OFFSET); writeq(0, iommu->mmio_base + IOMMU_EVENT_LOG_TAIL_OFFSET); - - iommu_set_bit(&entry, IOMMU_CONTROL_EVENT_LOG_INT_SHIFT); - iommu_set_bit(&entry, IOMMU_CONTROL_EVENT_LOG_ENABLE_SHIFT); - } - else - { - iommu_clear_bit(&entry, IOMMU_CONTROL_EVENT_LOG_INT_SHIFT); - iommu_clear_bit(&entry, IOMMU_CONTROL_EVENT_LOG_ENABLE_SHIFT); } - iommu_clear_bit(&entry, IOMMU_CONTROL_COMP_WAIT_INT_SHIFT); + iommu->ctrl.event_int_en = enable; + iommu->ctrl.event_log_en = enable; + iommu->ctrl.com_wait_int_en = false; - writel(entry, iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); + writeq(iommu->ctrl.raw, iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); } static void set_iommu_ppr_log_control(struct amd_iommu *iommu, - int enable) + bool enable) { - u32 entry; - - entry = readl(iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); - - /*reset head and tail pointer manually before enablement */ + /* Reset head and tail pointer manually before enablement */ if ( enable ) { writeq(0, iommu->mmio_base + IOMMU_PPR_LOG_HEAD_OFFSET); writeq(0, iommu->mmio_base + IOMMU_PPR_LOG_TAIL_OFFSET); - - iommu_set_bit(&entry, IOMMU_CONTROL_PPR_ENABLE_SHIFT); - iommu_set_bit(&entry, IOMMU_CONTROL_PPR_LOG_INT_SHIFT); - iommu_set_bit(&entry, IOMMU_CONTROL_PPR_LOG_ENABLE_SHIFT); - } - else - { - iommu_clear_bit(&entry, IOMMU_CONTROL_PPR_ENABLE_SHIFT); - iommu_clear_bit(&entry, IOMMU_CONTROL_PPR_LOG_INT_SHIFT); - iommu_clear_bit(&entry, IOMMU_CONTROL_PPR_LOG_ENABLE_SHIFT); } - writel(entry, iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); + iommu->ctrl.ppr_en = enable; + iommu->ctrl.ppr_int_en = enable; + iommu->ctrl.ppr_log_en = enable; + + writeq(iommu->ctrl.raw, iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); + if ( enable ) AMD_IOMMU_DEBUG("PPR Log Enabled.\n"); } @@ -398,7 +348,7 @@ static int iommu_read_log(struct amd_iom /* reset event log or ppr log when overflow */ static void iommu_reset_log(struct amd_iommu *iommu, struct ring_buffer *log, - void (*ctrl_func)(struct amd_iommu *iommu, int)) + void (*ctrl_func)(struct amd_iommu *iommu, bool)) { u32 entry; int log_run, run_bit; @@ -615,11 +565,11 @@ static void iommu_check_event_log(struct iommu_reset_log(iommu, &iommu->event_log, set_iommu_event_log_control); else { - entry = readl(iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); - if ( !(entry & IOMMU_CONTROL_EVENT_LOG_INT_MASK) ) + if ( !iommu->ctrl.event_int_en ) { - entry |= IOMMU_CONTROL_EVENT_LOG_INT_MASK; - writel(entry, iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); + iommu->ctrl.event_int_en = true; + writeq(iommu->ctrl.raw, + iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); /* * Re-schedule the tasklet to handle eventual log entries added * between reading the log above and re-enabling the interrupt. @@ -704,11 +654,11 @@ static void iommu_check_ppr_log(struct a iommu_reset_log(iommu, &iommu->ppr_log, set_iommu_ppr_log_control); else { - entry = readl(iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); - if ( !(entry & IOMMU_CONTROL_PPR_LOG_INT_MASK) ) + if ( !iommu->ctrl.ppr_int_en ) { - entry |= IOMMU_CONTROL_PPR_LOG_INT_MASK; - writel(entry, iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); + iommu->ctrl.ppr_int_en = true; + writeq(iommu->ctrl.raw, + iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); /* * Re-schedule the tasklet to handle eventual log entries added * between reading the log above and re-enabling the interrupt. @@ -754,7 +704,6 @@ static void do_amd_iommu_irq(unsigned lo static void iommu_interrupt_handler(int irq, void *dev_id, struct cpu_user_regs *regs) { - u32 entry; unsigned long flags; struct amd_iommu *iommu = dev_id; @@ -764,10 +713,9 @@ static void iommu_interrupt_handler(int * Silence interrupts from both event and PPR by clearing the * enable logging bits in the control register */ - entry = readl(iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); - iommu_clear_bit(&entry, IOMMU_CONTROL_EVENT_LOG_INT_SHIFT); - iommu_clear_bit(&entry, IOMMU_CONTROL_PPR_LOG_INT_SHIFT); - writel(entry, iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); + iommu->ctrl.event_int_en = false; + iommu->ctrl.ppr_int_en = false; + writeq(iommu->ctrl.raw, iommu->mmio_base + IOMMU_CONTROL_MMIO_OFFSET); spin_unlock_irqrestore(&iommu->lock, flags); --- a/xen/include/asm-x86/amd-iommu.h +++ b/xen/include/asm-x86/amd-iommu.h @@ -93,6 +93,8 @@ struct amd_iommu { void *mmio_base; unsigned long mmio_base_phys; + union amd_iommu_control ctrl; + struct table_struct dev_table; struct ring_buffer cmd_buffer; struct ring_buffer event_log; @@ -183,7 +185,7 @@ struct guest_iommu { uint64_t mmio_base; /* MMIO base address */ /* MMIO regs */ - struct mmio_reg reg_ctrl; /* MMIO offset 0018h */ + union amd_iommu_control reg_ctrl; /* MMIO offset 0018h */ struct mmio_reg reg_status; /* MMIO offset 2020h */ union amd_iommu_ext_features reg_ext_feature; /* MMIO offset 0030h */ --- a/xen/include/asm-x86/hvm/svm/amd-iommu-defs.h +++ b/xen/include/asm-x86/hvm/svm/amd-iommu-defs.h @@ -310,38 +310,56 @@ /* Control Register */ #define IOMMU_CONTROL_MMIO_OFFSET 0x18 -#define IOMMU_CONTROL_TRANSLATION_ENABLE_MASK 0x00000001 -#define IOMMU_CONTROL_TRANSLATION_ENABLE_SHIFT 0 -#define IOMMU_CONTROL_HT_TUNNEL_TRANSLATION_MASK 0x00000002 -#define IOMMU_CONTROL_HT_TUNNEL_TRANSLATION_SHIFT 1 -#define IOMMU_CONTROL_EVENT_LOG_ENABLE_MASK 0x00000004 -#define IOMMU_CONTROL_EVENT_LOG_ENABLE_SHIFT 2 -#define IOMMU_CONTROL_EVENT_LOG_INT_MASK 0x00000008 -#define IOMMU_CONTROL_EVENT_LOG_INT_SHIFT 3 -#define IOMMU_CONTROL_COMP_WAIT_INT_MASK 0x00000010 -#define IOMMU_CONTROL_COMP_WAIT_INT_SHIFT 4 -#define IOMMU_CONTROL_INVALIDATION_TIMEOUT_MASK 0x000000E0 -#define IOMMU_CONTROL_INVALIDATION_TIMEOUT_SHIFT 5 -#define IOMMU_CONTROL_PASS_POSTED_WRITE_MASK 0x00000100 -#define IOMMU_CONTROL_PASS_POSTED_WRITE_SHIFT 8 -#define IOMMU_CONTROL_RESP_PASS_POSTED_WRITE_MASK 0x00000200 -#define IOMMU_CONTROL_RESP_PASS_POSTED_WRITE_SHIFT 9 -#define IOMMU_CONTROL_COHERENT_MASK 0x00000400 -#define IOMMU_CONTROL_COHERENT_SHIFT 10 -#define IOMMU_CONTROL_ISOCHRONOUS_MASK 0x00000800 -#define IOMMU_CONTROL_ISOCHRONOUS_SHIFT 11 -#define IOMMU_CONTROL_COMMAND_BUFFER_ENABLE_MASK 0x00001000 -#define IOMMU_CONTROL_COMMAND_BUFFER_ENABLE_SHIFT 12 -#define IOMMU_CONTROL_PPR_LOG_ENABLE_MASK 0x00002000 -#define IOMMU_CONTROL_PPR_LOG_ENABLE_SHIFT 13 -#define IOMMU_CONTROL_PPR_LOG_INT_MASK 0x00004000 -#define IOMMU_CONTROL_PPR_LOG_INT_SHIFT 14 -#define IOMMU_CONTROL_PPR_ENABLE_MASK 0x00008000 -#define IOMMU_CONTROL_PPR_ENABLE_SHIFT 15 -#define IOMMU_CONTROL_GT_ENABLE_MASK 0x00010000 -#define IOMMU_CONTROL_GT_ENABLE_SHIFT 16 -#define IOMMU_CONTROL_RESTART_MASK 0x80000000 -#define IOMMU_CONTROL_RESTART_SHIFT 31 + +union amd_iommu_control { + uint64_t raw; + struct { + bool iommu_en:1; + bool ht_tun_en:1; + bool event_log_en:1; + bool event_int_en:1; + bool com_wait_int_en:1; + unsigned int inv_timeout:3; + bool pass_pw:1; + bool res_pass_pw:1; + bool coherent:1; + bool isoc:1; + bool cmd_buf_en:1; + bool ppr_log_en:1; + bool ppr_int_en:1; + bool ppr_en:1; + bool gt_en:1; + bool ga_en:1; + unsigned int crw:4; + bool smif_en:1; + bool slf_wb_dis:1; + bool smif_log_en:1; + unsigned int gam_en:3; + bool ga_log_en:1; + bool ga_int_en:1; + unsigned int dual_ppr_log_en:2; + unsigned int dual_event_log_en:2; + unsigned int dev_tbl_seg_en:3; + unsigned int priv_abrt_en:2; + bool ppr_auto_rsp_en:1; + bool marc_en:1; + bool blk_stop_mrk_en:1; + bool ppr_auto_rsp_aon:1; + bool domain_id_pne:1; + unsigned int :1; + bool eph_en:1; + unsigned int had_update:2; + bool gd_update_dis:1; + unsigned int :1; + bool xt_en:1; + bool int_cap_xt_en:1; + bool vcmd_en:1; + bool viommu_en:1; + bool ga_update_dis:1; + bool gappi_en:1; + unsigned int :8; + }; +}; /* Exclusion Register */ #define IOMMU_EXCLUSION_BASE_LOW_OFFSET 0x20
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