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/linux/arch/powerpc/
H A DKconfig.debug114 The cmdline option 'xmon' or 'xmon=early' will drop into xmon
115 very early during boot. 'xmon=on' will just enable the xmon
159 bool "Support for early boot text console (BootX or OpenFirmware only)"
168 bool "Early debugging (dangerous)"
170 Say Y to enable some early debugging facilities that may be available
172 intended to debug problems early during boot, this should not be
175 to be pushed to max automatically very early during boot
178 prompt "Early debugging console"
181 Use the selected console for early debugging. Careful, if you
189 Select this to enable early debugging for a machine using BootX
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/linux/arch/arm64/mm/
H A Dkasan_init.c30 * directly on kernel symbols (bm_p*d). All the early functions are called too
31 * early to use lm_alias so __p*d_populate functions must be used to populate
63 bool early) in kasan_pte_offset() argument
66 phys_addr_t pte_phys = early ? in kasan_pte_offset()
72 return early ? pte_offset_kimg(pmdp, addr) in kasan_pte_offset()
77 bool early) in kasan_pmd_offset() argument
80 phys_addr_t pmd_phys = early ? in kasan_pmd_offset()
86 return early ? pmd_offset_kimg(pudp, addr) : pmd_offset(pudp, addr); in kasan_pmd_offset()
90 bool early) in kasan_pud_offset() argument
93 phys_addr_t pud_phys = early in kasan_pud_offset()
103 kasan_p4d_offset(pgd_t * pgdp,unsigned long addr,int node,bool early) kasan_p4d_offset() argument
116 kasan_pte_populate(pmd_t * pmdp,unsigned long addr,unsigned long end,int node,bool early) kasan_pte_populate() argument
133 kasan_pmd_populate(pud_t * pudp,unsigned long addr,unsigned long end,int node,bool early) kasan_pmd_populate() argument
145 kasan_pud_populate(p4d_t * p4dp,unsigned long addr,unsigned long end,int node,bool early) kasan_pud_populate() argument
157 kasan_p4d_populate(pgd_t * pgdp,unsigned long addr,unsigned long end,int node,bool early) kasan_p4d_populate() argument
169 kasan_pgd_populate(unsigned long addr,unsigned long end,int node,bool early) kasan_pgd_populate() argument
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/linux/arch/sh/drivers/
H A Dplatform_early.c57 * sh_early_platform_driver_register - register early platform driver
113 * sh_early_platform_add_devices - adds a number of early platform devices
114 * @devs: array of early platform devices to add
115 * @num: number of early platform devices in array
117 * Used by early architecture code to register early platform devices and
139 * sh_early_platform_driver_register_all - register early platform drivers
140 * @class_str: string to identify early platform driver class
142 * Used by architecture code to register all early platform drivers
143 * for a certain class. If omitted then only early platform drivers
152 * Since we register our early platform drivers using early_param() in sh_early_platform_driver_register_all()
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/linux/drivers/gpu/drm/xe/
H A Dxe_bo_evict.c68 ret = xe_bo_apply_to_pinned(xe, &xe->pinned.early.kernel_bo_present, in xe_bo_notifier_prepare_all_pinned()
69 &xe->pinned.early.kernel_bo_present, in xe_bo_notifier_prepare_all_pinned()
94 (void)xe_bo_apply_to_pinned(xe, &xe->pinned.early.kernel_bo_present, in xe_bo_notifier_unprepare_all_pinned()
95 &xe->pinned.early.kernel_bo_present, in xe_bo_notifier_unprepare_all_pinned()
187 return xe_bo_apply_to_pinned(xe, &xe->pinned.early.kernel_bo_present, in xe_bo_evict_all()
188 &xe->pinned.early.evicted, in xe_bo_evict_all()
216 * xe_bo_restore_early - restore early phase kernel BOs to VRAM
223 * This function should be called early, before trying to init the GT, on device
228 return xe_bo_apply_to_pinned(xe, &xe->pinned.early.evicted, in xe_bo_restore_early()
229 &xe->pinned.early.kernel_bo_present, in xe_bo_restore_early()
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/linux/Documentation/admin-guide/
H A Dkernel-parameters.txt13 EARLY Parameter processed too early to be embedded in initrd.
110 acpi= [HW,ACPI,X86,ARM64,RISCV64,EARLY]
137 acpi_apic_instance= [ACPI,IOAPIC,EARLY]
152 acpi_force_32bit_fadt_addr [ACPI,EARLY]
216 acpi_force_table_verification [HW,ACPI,EARLY]
217 Enable table checksum verification during early stage.
218 By default, this is disabled due to x86 early mapping
256 acpi_no_static_ssdt [HW,ACPI,EARLY]
257 Disable installation of static SSDTs at early boo
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/linux/arch/arm/mm/
H A Dkasan_init.c44 unsigned long end, bool early) in kasan_pte_populate() argument
55 if (!early) { in kasan_pte_populate()
70 * The early shadow memory is mapping all KASan in kasan_pte_populate()
80 * Early shadow mappings are PMD_SIZE aligned, so if the in kasan_pte_populate()
94 unsigned long end, bool early) in kasan_pmd_populate() argument
106 void *p = early ? kasan_early_shadow_pte : in kasan_pmd_populate()
119 kasan_pte_populate(pmdp, addr, next, early); in kasan_pmd_populate()
124 bool early) in kasan_pgd_populate() argument
138 if (!early && pgd_none(*pgdp)) { in kasan_pgd_populate()
158 kasan_pmd_populate(pudp, addr, next, early); in kasan_pgd_populate()
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/linux/arch/arm/include/asm/
H A Dglue-df.h19 * v4_early - ARMv4 without Thumb early abort handler
21 * v4t_early - ARMv4 with Thumb early abort handler
22 * v5t_early - ARMv5 with Thumb early abort handler
23 * v5tj_early - ARMv5 with Thumb and Java early abort handler
25 * v6_early - ARMv6 generic early abort handler
26 * v7_early - ARMv7 generic early abort handler
/linux/Documentation/core-api/
H A Ddebugging-via-ohci1394.rst34 Together with a early initialization of the OHCI-1394 controller for debugging,
36 buffer on to debug early boot problems in areas like ACPI where the system
48 completed, an initialization routine which runs pretty early has been
53 Remote debugging over FireWire early on boot) and pass the parameter
54 "ohci1394_dma=early" to the recompiled kernel on boot.
89 Step-by-step instructions for using firescope with early OHCI initialization:
147 4) Prepare for debugging with early OHCI-1394 initialization:
152 (Kernel hacking: Provide code for enabling DMA over FireWire early on boot)
164 CONFIG_PROVIDE_OHCI1394_DMA_INIT enabled, with the option ohci1394_dma=early.
/linux/arch/mips/
H A DKconfig.debug4 bool "Early printk" if EXPERT
9 to print messages very early in the bootup process.
12 early before the console code is initialized. For normal operation,
22 "8250/16550 and compatible serial early printk driver"
131 occur early in the boot process of a secondary core.
144 debug information from the early stages of core startup.
/linux/drivers/firewire/
H A Dinit_ohci1394_dma.c7 * Derived from drivers/ieee1394/ohci1394.c and arch/x86/kernel/early-quirks.c
9 * - scan the PCI very early on boot for all OHCI 1394-compliant controllers
176 * to polling here because on early boot, we have no interrupts.
232 /* We had to wait and do this now if we want to debug early problems */ in init_ohci1394_reset_and_init_dma()
274 /* Poor man's PCI discovery, the only thing we can do at early boot */ in init_ohci1394_dma_on_all_controllers()
295 * setup_ohci1394_dma - enables early OHCI1394 DMA initialization
300 if (!strcmp(opt, "early")) in setup_ohci1394_dma()
305 /* passing ohci1394_dma=early on boot causes early OHCI1394 DMA initialization */
/linux/Documentation/arch/riscv/
H A Dboot.rst12 touching the early boot process. For the purposes of this document, the
13 ``early boot process`` refers to any code that runs before the final virtual
69 wins a lottery and executes the early boot code while the other harts are
105 Early Boot Requirements and Constraints
108 The RISC-V kernel's early boot process operates under the following constraints:
156 patching of early alternatives and the early parsing of the kernel command line.
/linux/arch/nios2/
H A DKconfig.debug4 bool "Activate early kernel debugging"
9 Enable early printk on console.
11 early before the console code is initialized.
/linux/drivers/gpu/drm/amd/amdgpu/
H A Damdgpu_ring.c555 u32 value, result, early[3] = { 0 }; in amdgpu_debugfs_ring_read() local
573 early[0] = amdgpu_ring_get_rptr(ring) & ring->buf_mask; in amdgpu_debugfs_ring_read()
574 early[1] = amdgpu_ring_get_wptr(ring) & ring->buf_mask; in amdgpu_debugfs_ring_read()
575 early[2] = ring->wptr & ring->buf_mask; in amdgpu_debugfs_ring_read()
577 r = put_user(early[i], (uint32_t *)buf); in amdgpu_debugfs_ring_read()
604 early[0] = amdgpu_ring_get_rptr(ring) & ring->buf_mask; in amdgpu_debugfs_ring_read()
605 early[1] = amdgpu_ring_get_wptr(ring) & ring->buf_mask; in amdgpu_debugfs_ring_read()
607 p = early[0]; in amdgpu_debugfs_ring_read()
608 if (early[0] <= early[1]) in amdgpu_debugfs_ring_read()
609 avail_dw = early[1] - early[0]; in amdgpu_debugfs_ring_read()
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/linux/tools/include/linux/
H A Dinit.h26 int early; member
29 #define __setup_param(str, unique_id, fn, early) \ argument
35 { __setup_str_##unique_id, fn, early }
/linux/arch/powerpc/mm/kasan/
H A Dinit_book3s_64.c11 * outline mode to avoid invalid access early in boot.
47 * 3) Map the 'early shadow'/zero page over iomap and vmemmap space. in kasan_init()
77 /* map the early shadow over the iomap and vmemmap space */ in kasan_init()
80 /* mark early shadow region as RO and wipe it */ in kasan_init()
/linux/arch/powerpc/kernel/
H A Disa-bridge.c106 * isa_bridge_find_early - Find and map the ISA IO space early before
108 * the arch code when adding PCI PHBs to get early
148 pr_debug("ISA bridge (early) is %pOF\n", np); in isa_bridge_find_early()
152 * isa_bridge_find_early - Find and map the ISA IO space early before
154 * the arch code when adding PCI PHBs to get early
238 /* Check if we have an early ISA device, without PCI dev */ in isa_bridge_notify()
/linux/security/
H A Dlsm_init.c21 /* Number of "early" LSMs */
383 * early_security_init - Initialize the early LSMs in early_security_init()
393 lsm_order_append(lsm, "early"); in early_security_init()
405 * This should be called early in the kernel initialization sequence. in security_init()
430 lsm_pr("enabled LSM early:%s\n", i->id->name); in security_init()
481 panic("early LSM cred alloc failed\n"); in security_init()
483 panic("early LSM task alloc failed\n"); in security_init()
487 /* skip the "early" LSMs as they have already been setup */
506 * security_initcall_early - Run the LSM early initcalls
510 return lsm_initcall(early); in security_initcall_core()
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/linux/Documentation/process/
H A D3.Early-stage.rst3 Early-stage planning
9 line of code is written. Some time spent in early planning and
71 Early discussion
75 discussions with the community before launching into implementation. Early
122 avoided with some early discussion with the kernel developers.
170 If possible, posting your plans during the early stages can only be
211 disclose its plans early in the development process. Companies with
/linux/arch/x86/kernel/
H A Didt.c60 * Early traps running on the DEFAULT_STACK because the other interrupt
219 * idt_setup_early_traps - Initialize the idt table with early traps
245 * Early traps running on the DEFAULT_STACK because the other interrupt
253 * idt_setup_early_pf - Initialize the idt table with early pagefault handler
261 * handler from the early_idt_handler_array to initialize the early page
328 * idt_setup_early_handler - Initializes the idt table with early handlers
/linux/arch/arm/mach-mvebu/
H A Dcoherency_ll.S11 * CPUs during their early boot in an SMP kernel, this why this
84 * calls. This function is used very early in the secondary
109 * calls. This function is used very early in the secondary
136 * calls. This function is used very early in the secondary
/linux/drivers/firmware/efi/
H A Dmemmap.c109 * setup and is therefore not suitable for calling during early EFI
115 * early EFI memmap should be explicitly unmapped once EFI
133 /* Did we forget to unmap the early EFI memmap? */ in efi_memmap_init_late()
142 * existing early EFI memmap. in efi_memmap_init_late()
/linux/arch/x86/boot/startup/
H A Dgdt_idt.c18 * The idt_table can't be used that early because all the code modifying it is
20 * during early CPU bringup. Also the idt_table has the runtime vectors
22 * which also hasn't happened yet in early CPU bringup.
/linux/drivers/net/wireless/intel/iwlwifi/pcie/
H A Diwl-context-info.h17 * @IWL_CTXT_INFO_EARLY_DEBUG: enable early debug
142 * struct iwl_context_info_early_dbg_cfg - early debug configuration for
144 * @early_debug_addr: early debug start address
163 * @edbg_cfg: early debug configuration
/linux/drivers/clk/qcom/
H A Dapcs-msm8996.c52 * as early as possible, without letting fw_devlink to delay probing of in qcom_apcs_msm8996_clk_probe()
58 * early during the boot process (as it is recommended by Qualcomm). in qcom_apcs_msm8996_clk_probe()
74 /* Register early enough to fix the clock to be used for other cores */
/linux/Documentation/driver-api/usb/
H A Dusb3-debug-port.rst35 EARLY PRINTK
38 DbC has been designed to log early printk messages. One use for
40 crashes very early before the regular console code is initialized.
65 During early boot of the debug target, DbC will be detected and

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