Merge tag 'asm-generic-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic updates from Arnd Bergmann:
 "There are three independent sets of changes:

   - Sai Prakash Ranjan adds tracing support to the asm-generic version
     of the MMIO accessors, which is intended to help understand
     problems with device drivers and has been part of Qualcomm's vendor
     kernels for many years

   - A patch from Sebastian Siewior to rework the handling of IRQ stacks
     in softirqs across architectures, which is needed for enabling
     PREEMPT_RT

   - The last patch to remove the CONFIG_VIRT_TO_BUS option and some of
     the code behind that, after the last users of this old interface
     made it in through the netdev, scsi, media and staging trees"

* tag 'asm-generic-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  uapi: asm-generic: fcntl: Fix typo 'the the' in comment
  arch/*/: remove CONFIG_VIRT_TO_BUS
  soc: qcom: geni: Disable MMIO tracing for GENI SE
  serial: qcom_geni_serial: Disable MMIO tracing for geni serial
  asm-generic/io: Add logging support for MMIO accessors
  KVM: arm64: Add a flag to disable MMIO trace for nVHE KVM
  lib: Add register read/write tracing support
  drm/meson: Fix overflow implicit truncation warnings
  irqchip/tegra: Fix overflow implicit truncation warnings
  coresight: etm4x: Use asm-generic IO memory barriers
  arm64: io: Use asm-generic high level MMIO accessors
  arch/*: Disable softirq stacks on PREEMPT_RT.

1 files changed, 97 insertions, 0 deletions

diff --git a/include/trace/events/rwmmio.h b/include/trace/events/rwmmio.h
new file mode 100644
index 000000000000..de41159216c1
--- /dev/null
+++ b/include/trace/events/rwmmio.h
@@ -0,0 +1,97 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM rwmmio
+
+#if !defined(_TRACE_RWMMIO_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_RWMMIO_H
+
+#include <linux/tracepoint.h>
+
+DECLARE_EVENT_CLASS(rwmmio_rw_template,
+
+	TP_PROTO(unsigned long caller, u64 val, u8 width, volatile void __iomem *addr),
+
+	TP_ARGS(caller, val, width, addr),
+
+	TP_STRUCT__entry(
+		__field(unsigned long, caller)
+		__field(unsigned long, addr)
+		__field(u64, val)
+		__field(u8, width)
+	),
+
+	TP_fast_assign(
+		__entry->caller = caller;
+		__entry->val = val;
+		__entry->addr = (unsigned long)addr;
+		__entry->width = width;
+	),
+
+	TP_printk("%pS width=%d val=%#llx addr=%#lx",
+		(void *)__entry->caller, __entry->width,
+		__entry->val, __entry->addr)
+);
+
+DEFINE_EVENT(rwmmio_rw_template, rwmmio_write,
+	TP_PROTO(unsigned long caller, u64 val, u8 width, volatile void __iomem *addr),
+	TP_ARGS(caller, val, width, addr)
+);
+
+DEFINE_EVENT(rwmmio_rw_template, rwmmio_post_write,
+	TP_PROTO(unsigned long caller, u64 val, u8 width, volatile void __iomem *addr),
+	TP_ARGS(caller, val, width, addr)
+);
+
+TRACE_EVENT(rwmmio_read,
+
+	TP_PROTO(unsigned long caller, u8 width, const volatile void __iomem *addr),
+
+	TP_ARGS(caller, width, addr),
+
+	TP_STRUCT__entry(
+		__field(unsigned long, caller)
+		__field(unsigned long, addr)
+		__field(u8, width)
+	),
+
+	TP_fast_assign(
+		__entry->caller = caller;
+		__entry->addr = (unsigned long)addr;
+		__entry->width = width;
+	),
+
+	TP_printk("%pS width=%d addr=%#lx",
+		 (void *)__entry->caller, __entry->width, __entry->addr)
+);
+
+TRACE_EVENT(rwmmio_post_read,
+
+	TP_PROTO(unsigned long caller, u64 val, u8 width, const volatile void __iomem *addr),
+
+	TP_ARGS(caller, val, width, addr),
+
+	TP_STRUCT__entry(
+		__field(unsigned long, caller)
+		__field(unsigned long, addr)
+		__field(u64, val)
+		__field(u8, width)
+	),
+
+	TP_fast_assign(
+		__entry->caller = caller;
+		__entry->val = val;
+		__entry->addr = (unsigned long)addr;
+		__entry->width = width;
+	),
+
+	TP_printk("%pS width=%d val=%#llx addr=%#lx",
+		 (void *)__entry->caller, __entry->width,
+		 __entry->val, __entry->addr)
+);
+
+#endif /* _TRACE_RWMMIO_H */
+
+#include <trace/define_trace.h>