From 5ffeb0501c6b36d080de78372fdb70b404b91e9d Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Mon, 25 Jul 2016 16:07:10 +0100 Subject: genirq: export irq_get_percpu_devid_partition to modules Any modular driver using cluster-affine PPIs needs to be able to call irq_get_percpu_devid_partition so that it can enable the IRQ on the correct subset of CPUs. This patch exports the symbol so that it can be called from within a module. Acked-by: Marc Zyngier Acked-by: Thomas Gleixner Signed-off-by: Will Deacon --- kernel/irq/irqdesc.c | 1 + 1 file changed, 1 insertion(+) (limited to 'kernel') diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index 82afb7ed369f..694c1a9d6485 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -863,6 +863,7 @@ int irq_get_percpu_devid_partition(unsigned int irq, struct cpumask *affinity) return 0; } +EXPORT_SYMBOL_GPL(irq_get_percpu_devid_partition); void kstat_incr_irq_this_cpu(unsigned int irq) { -- cgit v1.2.3 From bc1d202023eb66f088f736ba423bee1cf135c720 Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Tue, 16 Aug 2016 16:53:15 +0100 Subject: perf/core: Export AUX buffer helpers to modules Perf PMU drivers using AUX buffers cannot be built as modules unless the AUX helpers are exported. This patch exports perf_aux_output_{begin,end,skip} and perf_get_aux to modules. Cc: Peter Zijlstra Signed-off-by: Will Deacon --- kernel/events/ring_buffer.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'kernel') diff --git a/kernel/events/ring_buffer.c b/kernel/events/ring_buffer.c index f684d8e5fa2b..6d9bffe4d6cc 100644 --- a/kernel/events/ring_buffer.c +++ b/kernel/events/ring_buffer.c @@ -411,6 +411,7 @@ err: return NULL; } +EXPORT_SYMBOL_GPL(perf_aux_output_begin); static bool __always_inline rb_need_aux_wakeup(struct ring_buffer *rb) { @@ -480,6 +481,7 @@ void perf_aux_output_end(struct perf_output_handle *handle, unsigned long size) rb_free_aux(rb); ring_buffer_put(rb); } +EXPORT_SYMBOL_GPL(perf_aux_output_end); /* * Skip over a given number of bytes in the AUX buffer, due to, for example, @@ -505,6 +507,7 @@ int perf_aux_output_skip(struct perf_output_handle *handle, unsigned long size) return 0; } +EXPORT_SYMBOL_GPL(perf_aux_output_skip); void *perf_get_aux(struct perf_output_handle *handle) { @@ -514,6 +517,7 @@ void *perf_get_aux(struct perf_output_handle *handle) return handle->rb->aux_priv; } +EXPORT_SYMBOL_GPL(perf_get_aux); #define PERF_AUX_GFP (GFP_KERNEL | __GFP_ZERO | __GFP_NOWARN | __GFP_NORETRY) -- cgit v1.2.3 From 2d2123bc7c7f843aa9db87720de159a049839862 Mon Sep 17 00:00:00 2001 From: Dave Martin Date: Tue, 31 Oct 2017 15:51:14 +0000 Subject: arm64/sve: Add prctl controls for userspace vector length management MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch adds two arm64-specific prctls, to permit userspace to control its vector length: * PR_SVE_SET_VL: set the thread's SVE vector length and vector length inheritance mode. * PR_SVE_GET_VL: get the same information. Although these prctls resemble instruction set features in the SVE architecture, they provide additional control: the vector length inheritance mode is Linux-specific and nothing to do with the architecture, and the architecture does not permit EL0 to set its own vector length directly. Both can be used in portable tools without requiring the use of SVE instructions. Signed-off-by: Dave Martin Reviewed-by: Catalin Marinas Cc: Alex Bennée [will: Fixed up prctl constants to avoid clash with PDEATHSIG] Signed-off-by: Will Deacon --- kernel/sys.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'kernel') diff --git a/kernel/sys.c b/kernel/sys.c index 9aebc2935013..c541916b38c6 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -110,6 +110,12 @@ #ifndef SET_FP_MODE # define SET_FP_MODE(a,b) (-EINVAL) #endif +#ifndef SVE_SET_VL +# define SVE_SET_VL(a) (-EINVAL) +#endif +#ifndef SVE_GET_VL +# define SVE_GET_VL() (-EINVAL) +#endif /* * this is where the system-wide overflow UID and GID are defined, for @@ -2385,6 +2391,12 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, case PR_GET_FP_MODE: error = GET_FP_MODE(me); break; + case PR_SVE_SET_VL: + error = SVE_SET_VL(arg2); + break; + case PR_SVE_GET_VL: + error = SVE_GET_VL(); + break; default: error = -EINVAL; break; -- cgit v1.2.3