From 9cc63f8bcd560c760d0b12e15bba8f81c86237cf Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 14 Aug 2026 15:43:51 -0700 Subject: Merge branches 'expcb.2026.07.24a', 'misc.2026.07.30a', 'rcu-tasks.2026.07.30a', 'srcu.2026.08.11a' and 'torture.2026.08.14a' into HEAD Changes: Make expedited grace periods expedite normal RCU callbacks Miscellaneous fixes: * Improve diagnostic output with character task states. * Mark accesses to inform KCSAN of concurrency design. * Move from kmalloc() to kmalloc_obj(). * Documentation updates. * Improve handling of RCU deferred quiescent states. * Clean up unused function arguments and structure fields. * Reduce show_rcu_gp_kthreads() stack space. Tasks RCU updates: * Clean up after SRCU re-implementation of Tasks Trace RCU. * Mark accesses to inform KCSAN of concurrency design. * Add ->lazy_timer status to diagnostic output. * Remove an unnecessary memory barrier. * Fix a data race, courtesy of KCSAN. * Documentation updates. * Convert cond_resched_tasks_rcu_qs() from macro to static inline function. SRCU updates: * Add Rust helpers for SRCU. * Avoid losing queued work at cleanup_srcu_struct() time. Torture-test updates: * Preparation work for immediate RCU priority deboosting. * Test RCU readers from real interrupt handlers (as opposed to softirq). * Simplify code through use of cpumask_next_wrap(). * Improve diagnostic output with character task states. * Add rcutorture.nwriters parameter to allow lightweight stall testing, and rcutorture.stall_only to make doing so easier. * Test an RCU Tasks Trace grace period implying an RCU grace period. * Make RCU Tasks Trace torturing track reader batches. * Fix a data race, courtesy of KCSAN. * Plug a shuffle_tmp_mask memory leak on kthread spawn failure. --- include/asm-generic/msi.h | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 include/asm-generic/msi.h (limited to 'include/asm-generic/msi.h') diff --git a/include/asm-generic/msi.h b/include/asm-generic/msi.h new file mode 100644 index 000000000..92cca4b23 --- /dev/null +++ b/include/asm-generic/msi.h @@ -0,0 +1,42 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_GENERIC_MSI_H +#define __ASM_GENERIC_MSI_H + +#include + +#ifdef CONFIG_GENERIC_MSI_IRQ + +#ifndef NUM_MSI_ALLOC_SCRATCHPAD_REGS +# define NUM_MSI_ALLOC_SCRATCHPAD_REGS 2 +#endif + +struct msi_desc; + +/** + * struct msi_alloc_info - Default structure for MSI interrupt allocation. + * @desc: Pointer to msi descriptor + * @hwirq: Associated hw interrupt number in the domain + * @scratchpad: Storage for implementation specific scratch data + * + * Architectures can provide their own implementation by not including + * asm-generic/msi.h into their arch specific header file. + */ +typedef struct msi_alloc_info { + struct msi_desc *desc; + irq_hw_number_t hwirq; + unsigned long flags; + union { + unsigned long ul; + void *ptr; + } scratchpad[NUM_MSI_ALLOC_SCRATCHPAD_REGS]; +} msi_alloc_info_t; + +/* Device generating MSIs is proxying for another device */ +#define MSI_ALLOC_FLAGS_PROXY_DEVICE (1UL << 0) +#define MSI_ALLOC_FLAGS_FIXED_MSG_DATA (1UL << 1) + +#define GENERIC_MSI_DOMAIN_OPS 1 + +#endif /* CONFIG_GENERIC_MSI_IRQ */ + +#endif -- cgit v1.3.1