| /linux/drivers/irqchip/ |
| H A D | irq-riscv-intc.c | 1 // SPDX-License-Identifier: GPL-2.0
4 * Copyright (C) 2017-2018 SiFive
8 #define pr_fmt(fmt) "riscv-intc: " fmt
31 unsigned long cause = regs->cause & ~CAUSE_IRQ_FLAG; in riscv_intc_irq()
46 * On RISC-V systems local interrupts are masked or unmasked by writing
48 * on the local hart, these functions can only be called on the hart that
54 if (IS_ENABLED(CONFIG_32BIT) && d->hwirq >= BITS_PER_LONG) in riscv_intc_irq_mask()
55 csr_clear(CSR_IEH, BIT(d->hwirq - BITS_PER_LONG)); in riscv_intc_irq_mask()
57 csr_clear(CSR_IE, BIT(d->hwirq)); in riscv_intc_irq_mask()
62 if (IS_ENABLED(CONFIG_32BIT) && d->hwirq >= BITS_PER_LONG) in riscv_intc_irq_unmask()
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| H A D | irq-riscv-imsic-state.c | 1 // SPDX-License-Identifier: GPL-2.0
7 #define pr_fmt(fmt) "riscv-imsic: " fmt
22 #include "irq-riscv-imsic-state.h"
63 return imsic ? &imsic->global : NULL; in imsic_get_global_config()
74 imask = BIT(id & (__riscv_xlen - 1)); in __imsic_eix_read_clear()
102 * are XLEN-wide and we must not touch IDs which in __imsic_eix_update()
106 for (i = id & (__riscv_xlen - 1); id < last_id && i < __riscv_xlen; i++) { in __imsic_eix_update()
133 lockdep_assert_held(&lpriv->lock); in __imsic_local_sync()
135 for_each_set_bit(i, lpriv->dirty_bitmap, imsic->global.nr_ids + 1) { in __imsic_local_sync()
138 vec = &lpriv->vectors[i]; in __imsic_local_sync()
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| H A D | irq-riscv-imsic-platform.c | 1 // SPDX-License-Identifier: GPL-2.0
7 #define pr_fmt(fmt) "riscv-imsic: " fmt
23 #include "irq-riscv-imsic-state.h"
31 global = &imsic->global; in imsic_cpu_page_phys()
32 local = per_cpu_ptr(global->local, cpu); in imsic_cpu_page_phys()
34 if (BIT(global->guest_index_bits) <= guest_index) in imsic_cpu_page_phys()
38 *out_msi_pa = local->msi_pa + (guest_index * IMSIC_MMIO_PAGE_SZ); in imsic_cpu_page_phys()
59 return -ENOENT; in imsic_irq_retrigger()
61 local = per_cpu_ptr(imsic->global.local, vec->cpu); in imsic_irq_retrigger()
62 writel_relaxed(vec->local_id, local->msi_va); in imsic_irq_retrigger()
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| /linux/arch/riscv/mm/ |
| H A D | cacheflush.c | 1 // SPDX-License-Identifier: GPL-2.0-only
35 * Performs an icache flush for the given MM context. RISC-V has no direct
39 * single-hart processes on a many-hart machine, ie 'make -j') we avoid the
42 * execution resumes on each hart.
51 /* Mark every hart's icache as needing a flush for this MM. */ in flush_icache_mm()
52 mask = &mm->context.icache_stale_mask; in flush_icache_mm()
54 /* Flush this hart's I$ now, and mark it as flushed. */ in flush_icache_mm()
65 if (mm == current->active_mm && local) { in flush_icache_mm()
68 * performed on this hart between setting a hart's cpumask bit in flush_icache_mm()
69 * and scheduling this MM context on that hart. Sending an SBI in flush_icache_mm()
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| /linux/include/linux/irqchip/ |
| H A D | riscv-imsic.h | 1 /* SPDX-License-Identifier: GPL-2.0-only */
50 * XLEN-1 12 0
52 * -------------------------------------------------------------
53 * |xxxxxx|Group Index|xxxxxxxxxxx|HART Index|Guest Index| 0 |
54 * -------------------------------------------------------------
57 /* Bits representing Guest index, HART index, and Group index */
72 /* Per-CPU IMSIC addresses */
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| /linux/arch/riscv/kernel/ |
| H A D | kexec_relocate.S | 1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2019 FORTH-ICS/CARV
19 * s3: (const) The hartid of the current hart
50 * With C-extension, here we get 42 Bytes and the next
59 REG_L t0, 0(s0) /* t0 = *image->entry */
60 addi s0, s0, RISCV_SZPTR /* image->entry++ */
62 /* IND_DESTINATION entry ? -> save destination address */
69 /* IND_INDIRECTION entry ? -> update next entry ptr (PA) */
77 /* IND_DONE entry ? -> jump to done label */
84 * IND_SOURCE entry ? -> copy page word by word to the
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| H A D | cpufeature.c | 1 // SPDX-License-Identifier: GPL-2.0-only
24 #include <asm/text-patching.h>
32 #define NUM_ALPHA_EXTS ('z' - 'a' + 1)
41 /* Per-cpu ISA extensions. */
47 * riscv_isa_extension_base() - Get base extension word
63 * __riscv_isa_extension_available() - Check whether given extension
87 pr_err("Zicbom detected in ISA string, disabling as no cbom-block-size found\n"); in riscv_ext_zicbom_validate()
88 return -EINVAL; in riscv_ext_zicbom_validate()
91 pr_err("Zicbom disabled as cbom-block-size present, but is not a power-of-2\n"); in riscv_ext_zicbom_validate()
92 return -EINVAL; in riscv_ext_zicbom_validate()
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| H A D | entry.S | 1 /* SPDX-License-Identifier: GPL-2.0-only */
16 #include <asm/asm-offsets.h>
60 * bit_pos = cpu % 64 = cpu - (cpu / 64) * 64 = cpu - (cpu >> 6) << 6
61 * = cpu - ((cpu >> 6) << 3) << 3
109 * The RISC-V kernel does not eagerly emit a sfence.vma after each
111 * - if the uarch caches invalid entries, the new mapping would not be
113 * - if the uarch does not cache invalid entries, a reordered access
123 addi sp, sp, -(PT_SIZE_ON_STACK)
133 addi sp, sp, -(PT_SIZE_ON_STACK)
140 * Disable user-mode memory access as it should only be set in the
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| /linux/Documentation/arch/riscv/ |
| H A D | boot.rst | 1 .. SPDX-License-Identifier: GPL-2.0
4 RISC-V Kernel Boot Requirements and Constraints
10 This document describes what the RISC-V kernel expects from bootloaders and
16 Pre-kernel Requirements and Constraints
19 The RISC-V kernel expects the following of bootloaders and platform firmware:
22 --------------
24 The RISC-V kernel expects:
30 ---------
32 The RISC-V kernel expects:
37 -------------------------------------
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| /linux/drivers/cpuidle/ |
| H A D | cpuidle-riscv-sbi.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * RISC-V SBI CPU idle driver.
9 #define pr_fmt(fmt) "cpuidle-riscv-sbi: " fmt
53 data->available = true; in sbi_set_domain_state()
54 data->state = state; in sbi_set_domain_state()
61 return data->state; in sbi_get_domain_state()
68 data->available = false; in sbi_clear_domain_state()
75 return data->available; in sbi_is_domain_state_available()
96 u32 *states = data->states; in __sbi_enter_domain_idle_state()
97 struct device *pd_dev = data->dev; in __sbi_enter_domain_idle_state()
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| /linux/Documentation/timers/ |
| H A D | highres.rst | 8 https://www.kernel.org/doc/ols/2006/ols2006v1-pages-333-346.pdf
11 http://www.cs.columbia.edu/~nahum/w6998/papers/ols2006-hrtimers-slides.pdf
23 - hrtimer base infrastructure
24 - timeofday and clock source management
25 - clock event management
26 - high resolution timer functionality
27 - dynamic ticks
31 ---------------------------
40 - time ordered enqueueing into a rb-tree
41 - independent of ticks (the processing is based on nanoseconds)
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| /linux/arch/riscv/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
4 # see Documentation/kbuild/kconfig-language.rst.
66 # LLD >= 14: https://github.com/llvm/llvm-project/issues/50505
222 # -Zsanitizer=shadow-call-stack flag.
232 depends on $(cc-option,-fpatchable-function-entry=8)
235 def_bool $(cc-option,-fsanitize=shadow-call-stack)
236 …# https://github.com/riscv-non-isa/riscv-elf-psabi-doc/commit/a484e843e6eeb51f0cb7b8819e50da6d2444…
237 depends on $(ld-option,--no-relax-gp)
241 # https://github.com/llvm/llvm-project/commit/6611d58f5bbcbec77262d392e2923e1d680f6985
244 # https://github.com/llvm/llvm-project/commit/bbc0f99f3bc96f1db16f649fc21dd18e5b0918f6
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| /linux/arch/riscv/kvm/ |
| H A D | aia.c | 1 // SPDX-License-Identifier: GPL-2.0
13 #include <linux/irqchip/riscv-imsic.h>
39 raw_spin_lock_irqsave(&hgctrl->lock, flags); in aia_find_hgei()
41 hgei = -1; in aia_find_hgei()
43 if (hgctrl->owners[i] == owner) { in aia_find_hgei()
49 raw_spin_unlock_irqrestore(&hgctrl->lock, flags); in aia_find_hgei()
72 struct kvm_vcpu_aia_csr *csr = &vcpu->arch.aia_context.guest_csr; in kvm_riscv_vcpu_aia_flush_interrupts()
78 if (READ_ONCE(vcpu->arch.irqs_pending_mask[1])) { in kvm_riscv_vcpu_aia_flush_interrupts()
79 mask = xchg_acquire(&vcpu->arch.irqs_pending_mask[1], 0); in kvm_riscv_vcpu_aia_flush_interrupts()
80 val = READ_ONCE(vcpu->arch.irqs_pending[1]) & mask; in kvm_riscv_vcpu_aia_flush_interrupts()
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| /linux/Documentation/process/ |
| H A D | embargoed-hardware-issues.rst | 7 -----
23 -------
31 Linux kernel security team (:ref:`Documentation/admin-guide/
34 The team can be contacted by email at <hardware-security@kernel.org>. This
43 - PGP: https://www.kernel.org/static/files/hardware-security.asc
44 - S/MIME: https://www.kernel.org/static/files/hardware-security.crt
55 - Linus Torvalds (Linux Foundation Fellow)
56 - Greg Kroah-Hartman (Linux Foundation Fellow)
57 - Thomas Gleixner (Linux Foundation Fellow)
59 Operation of mailing-lists
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| /linux/Documentation/RCU/ |
| H A D | RTFP.txt | 4 This document describes RCU-related publications, and is followed by
19 with short-lived threads, such as the K42 research operating system.
20 However, Linux has long-lived tasks, so more is needed.
23 serialization, which is an RCU-like mechanism that relies on the presence
27 that these overheads were not so expensive in the mid-80s. Nonetheless,
28 passive serialization appears to be the first deferred-destruction
30 has lapsed, so this approach may be used in non-GPL software, if desired.
34 In 1987, Rashid et al. described lazy TLB-flush [RichardRashid87a].
36 this paper helped inspire the update-side batching used in the later
38 a description of Argus that noted that use of out-of-date values can
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| /linux/include/acpi/ |
| H A D | actbl2.h | 1 /* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
4 * Name: actbl2.h - ACPI Table Definitions (tables not in ACPI spec)
6 * Copyright (C) 2000 - 2023, Intel Corp.
52 #define ACPI_SIG_RHCT "RHCT" /* RISC-V Hart Capabilities Table */
60 * All tables must be byte-packed to match the ACPI specification, since
70 * essentially useless for dealing with packed data in on-disk formats or
79 * AEST - Arm Error Source Table
90 /* Common Subtable header - one per Node Structure (Subtable) */
323 * AGDI - Arm Generic Diagnostic Dump and Reset Device Interface
343 * APMT - ARM Performance Monitoring Unit Table
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| /linux/drivers/platform/x86/ |
| H A D | wmi.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * ACPI-WMI mapping driver
5 * Copyright (C) 2007-2008 Carlos Corbacho <carlos@strangeworlds.co.uk>
9 * Copyright (c) 2001-2007 Anton Altaparmakov
12 * WMI bus infrastructure by Andrew Lutomirski and Darren Hart:
36 MODULE_DESCRIPTION("ACPI-WMI Mapping Driver");
114 id = wdriver->id_table; in find_guid_context()
118 while (*id->guid_string) { in find_guid_context()
119 if (guid_parse_and_compare(id->guid_string, &wblock->gblock.guid)) in find_guid_context()
120 return id->context; in find_guid_context()
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| /linux/ |
| H A D | MAINTAINERS | 5 ---------------------------------------------------
21 W: *Web-page* with status/info
23 B: URI for where to file *bugs*. A web-page with detailed bug
28 patches to the given subsystem. This is either an in-tree file,
29 or a URI. See Documentation/maintainer/maintainer-entry-profile.rst
38 One pattern per line. Multiple F: lines acceptable.
46 N: [^a-z]tegra all files whose path contains tegra
48 One pattern per line. Multiple N: lines acceptable.
61 One regex pattern per line. Multiple K: lines acceptable.
64 ----------------
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