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/linux/arch/s390/include/asm/
H A Dalternative.h1 /* SPDX-License-Identifier: GPL-2.0 */
6 * Each alternative comes with a 32 bit feature field:
16 * @ctx is a bitfield, where only one bit must be set. Each bit defines
17 * in which context an alternative is supposed to be applied to the
20 * - from the decompressor before the kernel itself is executed
21 * - from early kernel code from within the kernel
23 * @type is a number which defines the type and with that the type
24 * specific alternative patching.
27 * alternative should be applied.
67 u32 type : 8; /* type of alternative */
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H A Dspinlock.h1 /* SPDX-License-Identifier: GPL-2.0 */
7 * Derived from "include/asm-i386/spinlock.h"
17 #include <asm/alternative.h>
27 ALTERNATIVE(" ly %[lockval],%[offzero](%%r0)\n", in spinlock_lockval()
33 "m" (((struct lowcore *)0)->spinlock_lockval)); in spinlock_lockval()
47 * We make no fairness assumptions. They have a cost.
71 return READ_ONCE(lp->lock) != 0; in arch_spin_is_locked()
79 return likely(arch_try_cmpxchg(&lp->lock, &old, spinlock_lockval())); in arch_spin_trylock_once()
97 typecheck(int, lp->lock); in arch_spin_unlock()
100 ALTERNATIVE("nop", ".insn rre,0xb2fa0000,7,0", ALT_FACILITY(49)) /* NIAI 7 */ in arch_spin_unlock()
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/linux/arch/x86/include/asm/
H A Dsmap.h1 /* SPDX-License-Identifier: GPL-2.0-only */
14 #include <asm/alternative.h>
19 ALTERNATIVE "", "clac", X86_FEATURE_SMAP
22 ALTERNATIVE "", "stac", X86_FEATURE_SMAP
28 /* Note: a barrier is implicit in alternative() */ in clac()
29 alternative("", "clac", X86_FEATURE_SMAP); in clac()
34 /* Note: a barrier is implicit in alternative() */ in stac()
35 alternative("", "stac", X86_FEATURE_SMAP); in stac()
43 ALTERNATIVE(ANNOTATE_IGNORE_ALTERNATIVE in smap_save()
54 ALTERNATIVE(ANNOTATE_IGNORE_ALTERNATIVE in smap_restore()
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H A Dalternative.h1 /* SPDX-License-Identifier: GPL-2.0 */
24 * Alternative inline assembly for SMP.
30 * alternatives and the X86_FEATURE_UP flag to indicate the case of a
31 * UP system running a SMP kernel. The existing apply_alternatives()
32 * works fine for patching a SMP kernel for UP.
34 * The SMP alternative tables can be kept after boot and contain both
36 * SMP at runtime, when hotplugging in a new CPU, which is especially
39 * The very common lock prefix is handled as special case in a
40 * separate table which is a pure address list without replacement ptr
46 ".pushsection .smp_locks,\"a\"\n" \
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H A Dnospec-branch.h1 /* SPDX-License-Identifier: GPL-2.0 */
10 #include <asm/alternative.h>
12 #include <asm/msr-index.h>
20 * The tracking does not use a counter. It uses uses arithmetic shift
35 * After a return buffer fill the depth is credited 12 calls before the
38 * There is a inaccuracy for situations like this:
48 * but there is still a cushion vs. the RSB depth. The algorithm does not
77 #include <asm/asm-offsets.h>
80 movq $-1, PER_CPU_VAR(__x86_call_depth);
107 * Each entry in the RSB, if used for a speculative 'ret', contains an
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/linux/arch/arm64/include/asm/
H A Dalternative-macros.h1 /* SPDX-License-Identifier: GPL-2.0 */
9 #include <asm/insn-def.h>
12 * Binutils 2.27.0 can't handle a 'UL' suffix on constants, so for the assembly
27 " .word 661b - .\n" /* label */ \
28 " .word 663f - .\n" /* new instruction */ \
30 " .byte 662b-661b\n" /* source len */ \
31 " .byte 664f-663f\n" /* replacement len */
34 " .word 661b - .\n" /* label */ \
35 " .word " __stringify(cb) "- .\n" /* callback */ \
37 " .byte 662b-661b\n" /* source len */ \
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H A Dio.h1 /* SPDX-License-Identifier: GPL-2.0-only */
5 * Copyright (C) 1996-2000 Russell King
18 #include <asm/alternative.h>
23 * Generic IO read/write. These perform native-endian accesses.
57 asm volatile(ALTERNATIVE("ldrb %w0, [%1]", in __raw_readb()
69 asm volatile(ALTERNATIVE("ldrh %w0, [%1]", in __raw_readw()
80 asm volatile(ALTERNATIVE("ldr %w0, [%1]", in __raw_readl()
91 asm volatile(ALTERNATIVE("ldr %0, [%1]", in __raw_readq()
106 * Create a dummy control dependency from the IO read to any \
107 * later instructions. This ensures that a subsequent call to \
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/linux/Documentation/networking/pse-pd/
H A Dpse-pi.rst1 .. SPDX-License-Identifier: GPL-2.0
6 The Power Sourcing Equipment Power Interface (PSE PI) plays a pivotal role in
7 the architecture of Power over Ethernet (PoE) systems. It is essentially a
9 eight-pin modular jack, commonly known as the Ethernet RJ45 port. This
14 ---------------------------
19 - Section "33.2.3 PI pin assignments" covers the pin assignments for PoE
21 - Section "145.2.4 PSE PI" addresses the configuration for PoE systems that
25 -------------------------------
27 Single Pair Ethernet (SPE) represents a different approach to Ethernet
31 two pairs of wires, SPE operates on a simpler model due to its single-pair
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/linux/arch/loongarch/include/asm/
H A Dalternative.h1 /* SPDX-License-Identifier: GPL-2.0 */
21 * Debug flag that can be tested to see whether alternative
34 #define alt_slen "662b-661b"
35 #define alt_total_slen alt_end_marker"b-661b"
36 #define alt_rlen(num) e_replacement(num)"f-"b_replacement(num)"f"
40 ".fill -(((" alt_rlen(num) ")-(" alt_slen ")) > 0) * " \
41 "((" alt_rlen(num) ")-(" alt_slen ")) / 4, 4, 0x03400000\n"
47 #define alt_max_short(a, b) "((" a ") ^ (((" a ") ^ (" b ")) & -(-((" a ") < (" b ")))))" argument
50 * Pad the second replacement alternative with additional NOPs if it is
51 * additionally longer than the first replacement alternative.
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H A Dalternative-asm.h1 /* SPDX-License-Identifier: GPL-2.0 */
16 .long \orig - .
17 .long \alt - .
24 * Define an alternative between two instructions. If @feature is
29 .macro ALTERNATIVE oldinstr, newinstr, feature
33 .fill - (((144f-143f)-(141b-140b)) > 0) * ((144f-143f)-(141b-140b)) / 4, 4, 0x03400000
36 .pushsection .altinstructions, "a"
37 altinstruction_entry 140b, 143f, \feature, 142b-140b, 144f-143f
47 #define old_len (141b-140b)
48 #define new_len1 (144f-143f)
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/linux/Documentation/devicetree/bindings/net/pse-pd/
H A Dpse-controller.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/net/pse-pd/pse-controller.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 power over twisted pair/ethernet cable. The ethernet-pse nodes should be
12 used to describe PSE controller and referenced by the ethernet-phy node.
15 - Oleksij Rempel <o.rempel@pengutronix.de>
16 - Kory Maincent <kory.maincent@bootlin.com>
20 pattern: "^ethernet-pse(@.*|-([0-9]|[1-9][0-9]+))?$"
22 "#pse-cells":
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H A Dti,tps23881.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/net/pse-pd/ti,tps23881.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Kory Maincent <kory.maincent@bootlin.com>
13 - $ref: pse-controller.yaml#
18 - ti,tps23881
26 '#pse-cells':
29 reset-gpios:
37 their pairsets. For 4-pair operation, two channels from the same group
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H A Dmicrochip,pd692x0.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/net/pse-pd/microchip,pd692x0.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Kory Maincent <kory.maincent@bootlin.com>
13 - $ref: pse-controller.yaml#
18 - microchip,pd69200
19 - microchip,pd69210
20 - microchip,pd69220
25 vdd-supply:
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/linux/arch/riscv/include/asm/
H A Dalternative-macros.h1 /* SPDX-License-Identifier: GPL-2.0 */
10 .4byte \oldptr - .
11 .4byte \newptr - .
19 .pushsection .alternative, "a"
20 ALT_ENTRY 886b, 888f, \vendor_id, \patch_id, 889f - 888f
30 .org . - (889b - 888b) + (887b - 886b)
31 .org . - (887b - 886b) + (889b - 888b)
62 ".4byte ((" oldptr ") - .) \n" \
63 ".4byte ((" newptr ") - .) \n" \
70 ".pushsection .alternative, \"a\"\n" \
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H A Dbitops.h1 /* SPDX-License-Identifier: GPL-2.0-only */
19 #include <asm-generic/bitops/__ffs.h>
20 #include <asm-generic/bitops/__fls.h>
21 #include <asm-generic/bitops/ffs.h>
22 #include <asm-generic/bitops/fls.h>
30 #include <asm-generic/bitops/__ffs.h>
31 #include <asm-generic/bitops/__fls.h>
32 #include <asm-generic/bitops/ffs.h>
33 #include <asm-generic/bitops/fls.h>
35 #include <asm/alternative-macros.h>
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/linux/arch/x86/entry/
H A Dcalling.h1 /* SPDX-License-Identifier: GPL-2.0 */
7 #include <asm/asm-offsets.h>
8 #include <asm/processor-flags.h>
9 #include <asm/ptrace-abi.h>
11 #include <asm/nospec-branch.h>
15 x86 function call convention, 64-bit:
16 -------------------------------------
17 arguments | callee-saved | extra caller-saved | return
18 [callee-clobbered] | | [callee-clobbered] |
19 ---------------------------------------------------------------------------
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/linux/arch/parisc/include/asm/
H A Dalternative.h1 /* SPDX-License-Identifier: GPL-2.0 */
7 #define ALT_COND_NO_DCACHE 0x02 /* if system has no d-cache */
8 #define ALT_COND_NO_ICACHE 0x04 /* if system has no i-cache */
35 /* Alternative SMP implementation. */
36 #define ALTERNATIVE(cond, replacement) "!0:" \ macro
37 ".section .altinstructions, \"a\" !" \
39 ".word (0b-4-.) !" \
46 /* to replace one single instructions by a new instruction */
47 #define ALTERNATIVE(from, to, cond, replacement)\ macro
48 .section .altinstructions, "a" ! \
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/linux/arch/s390/kernel/
H A Dentry.S1 /* SPDX-License-Identifier: GPL-2.0 */
3 * S390 low-level entry points.
14 #include <asm/asm-extable.h>
15 #include <asm/alternative.h>
22 #include <asm/asm-offsets.h>
27 #include <asm/fpu-insn.h>
30 #include <asm/nospec-insn.h>
37 ALTERNATIVE "nop", ".insn s,0xb2010000,\address", ALT_FACILITY(193)
41 ALTERNATIVE "nop", ".insn s,0xb2000000,\address", ALT_FACILITY(193)
52 ALTERNATIVE "brcl 0,0", __stringify(mvc __PT_LAST_BREAK(8,\reg),__LC_LAST_BREAK(\lowcore)),\
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/linux/arch/parisc/kernel/
H A Dpacache.S1 /* SPDX-License-Identifier: GPL-2.0-or-later */
4 * Copyright (C) 2000-2001 Hewlett-Packard (John Marvin)
5 * Copyright (C) 2001 Matthew Wilcox (willy at parisc-linux.org)
6 * Copyright (C) 2002 Richard Hirst (rhirst with parisc-linux.org)
26 #include <asm/alternative.h>
42 /* pcxt_ssm_bug - relied upon translation! PA 2.0 Arch. F-4 and F-5 */
43 rsm PSW_SM_I, %r19 /* save I-bit state */
74 addib,COND(=) -1, %arg3, fitoneloop /* Preadjust and test */
84 addib,COND(>) -1, %r31, fitmanymiddle /* Adjusted inner loop decr */
87 addib,COND(>) -1, %r29, fitmanymiddle /* Middle loop decr */
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H A Dalternative.c1 // SPDX-License-Identifier: GPL-2.0
3 * Alternative live-patching for parisc.
10 #include <asm/alternative.h>
21 __setup("no-alternatives", setup_no_alternatives);
38 * If the PDC_MODEL capabilities has Non-coherent IO-PDIR bit in apply_alternatives()
40 * time IO-PDIR is changed in Ike/Astro. in apply_alternatives()
52 from = (u32 *)((ulong)&entry->orig_offset + entry->orig_offset); in apply_alternatives()
53 len = entry->len; in apply_alternatives()
54 cond = entry->cond; in apply_alternatives()
55 replacement = entry->replacement; in apply_alternatives()
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/linux/arch/riscv/kernel/
H A Dalternative.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * alternative runtime patching
13 #include <asm/alternative.h>
21 #include <asm/text-patching.h>
35 cpu_mfr_info->vendor_id = csr_read(CSR_MVENDORID); in riscv_fill_cpu_mfr_info()
36 cpu_mfr_info->arch_id = csr_read(CSR_MARCHID); in riscv_fill_cpu_mfr_info()
37 cpu_mfr_info->imp_id = csr_read(CSR_MIMPID); in riscv_fill_cpu_mfr_info()
39 cpu_mfr_info->vendor_id = sbi_get_mvendorid(); in riscv_fill_cpu_mfr_info()
40 cpu_mfr_info->arch_id = sbi_get_marchid(); in riscv_fill_cpu_mfr_info()
41 cpu_mfr_info->imp_id = sbi_get_mimpid(); in riscv_fill_cpu_mfr_info()
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/linux/arch/x86/lib/
H A Dretpoline.S1 /* SPDX-License-Identifier: GPL-2.0 */
8 #include <asm/alternative.h>
9 #include <asm/asm-offsets.h>
10 #include <asm/nospec-branch.h>
53 * Worse, you can only have a single EXPORT_SYMBOL per line,
64 #include <asm/GEN-for-each-reg.h>
71 #include <asm/GEN-for-each-reg.h>
94 #include <asm/GEN-for-each-reg.h>
101 #include <asm/GEN-for-each-reg.h>
120 #include <asm/GEN-for-each-reg.h>
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/linux/arch/loongarch/kernel/
H A Dalternative.c1 // SPDX-License-Identifier: GPL-2.0-only
5 #include <asm/alternative.h>
14 #define MAX_PATCH_SIZE (((u8)(-1)) / LOONGARCH_INSN_SIZE)
23 __setup("debug-alternative", debug_alt);
41 for (_j = 0; _j < count - 1; _j++) \
47 /* Use this to add nops to a buffer, then text_poke the whole buffer. */
50 while (count--) { in add_nops()
51 insn->word = INSN_NOP; in add_nops()
73 si_l = src->reg0i26_format.immediate_l; in recompute_jump()
74 si_h = src->reg0i26_format.immediate_h; in recompute_jump()
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/linux/tools/arch/x86/lib/
H A Dmemset_64.S1 /* SPDX-License-Identifier: GPL-2.0 */
8 #include <asm/alternative.h>
13 * ISO C memset - set a memory block to a byte value. This function uses fast
23 * The FSRS alternative should be done inline (avoiding the call and
33 ALTERNATIVE "jmp memset_orig", "", X86_FEATURE_FSRS
/linux/include/linux/pse-pd/
H A Dpse.h1 // SPDX-License-Identifier: GPL-2.0-only
15 /* Maximum current in uA according to IEEE 802.3-2022 Table 145-1 */
17 /* Maximum power in mW according to IEEE 802.3-2022 Table 145-16 */
46 * struct pse_irq_desc - notification sender description for IRQ based events.
59 * struct pse_control_config - PSE control/channel configuration.
62 * IEEE 802.3-2018 30.15.1.2.1 acPoDLPSEAdminControl
64 * IEEE 802.3-2022 30.9.1.2.1 acPSEAdminControl
72 * struct pse_admin_state - PSE operational state
75 * functions. IEEE 802.3-2018 30.15.1.1.2 aPoDLPSEAdminState
77 * functions. IEEE 802.3-2022 30.9.1.1.2 aPSEAdminState
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