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Add initial RISC-V support

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Andrew Lukoshko 2025-08-21 17:03:26 +00:00 committed by root
parent a9c4c98887
commit b8096e6930
2 changed files with 77 additions and 1 deletions
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67
papi-riscv64.patch Normal file
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@ -0,0 +1,67 @@
From b464420f3a2855b2c800413a4c5767b69e088087 Mon Sep 17 00:00:00 2001
From: Vince Weaver <vincent.weaver@maine.edu>
Date: Tue, 9 Jan 2024 21:50:26 +0000
Subject: [PATCH] add initial riscv support
This adds basic support for the RISC-V architecture
After this PAPI will compile and the tools will run, however no events will
work because of missing libpfm4 support.
Tested on a BeagleV-Ahead board
---
src/linux-context.h | 2 ++
src/linux-timer.c | 2 +-
src/mb.h | 10 ++++++++++
3 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/src/linux-context.h b/src/linux-context.h
index f46e5577b..394a4804d 100644
--- a/src/linux-context.h
+++ b/src/linux-context.h
@@ -39,6 +39,8 @@ typedef ucontext_t hwd_ucontext_t;
#define OVERFLOW_ADDRESS(ctx) ctx.ucontext->uc_mcontext.pc
#elif defined(__hppa__)
#define OVERFLOW_ADDRESS(ctx) ctx.ucontext->uc_mcontext.sc_iaoq[0]
+#elif defined(__riscv)
+#define OVERFLOW_ADDRESS(ctx) ctx.ucontext->uc_mcontext.__gregs[REG_PC]
#else
#error "OVERFLOW_ADDRESS() undefined!"
#endif
diff --git a/src/linux-timer.c b/src/linux-timer.c
index 0eaa79c66..be489f325 100644
--- a/src/linux-timer.c
+++ b/src/linux-timer.c
@@ -281,7 +281,7 @@ static inline long long get_cycles()
return retval;
}
-#elif (defined(__arm__) || defined(__mips__) || defined(__hppa__))
+#elif (defined(__arm__) || defined(__mips__) || defined(__hppa__)) || defined(__riscv)
static inline long long
get_cycles( void )
{
diff --git a/src/mb.h b/src/mb.h
index 81797c553..56d980410 100644
--- a/src/mb.h
+++ b/src/mb.h
@@ -63,6 +63,16 @@
#define rmb() asm volatile("lfence":::"memory")
#endif
+
+#elif defined (__riscv)
+#define RISCV_FENCE(p, s) \
+ __asm__ __volatile__ ("fence " #p "," #s : : : "memory")
+
+/* These barriers need to enforce ordering on both devices or memory. */
+#define mb() RISCV_FENCE(iorw,iorw)
+#define rmb() RISCV_FENCE(ir,ir)
+#define wmb() RISCV_FENCE(ow,ow)
+
#else
#error Need to define rmb for this architecture!
#error See the kernel source directory: tools/perf/perf.h file
--
2.49.0

11
papi.spec
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@ -15,7 +15,7 @@
Summary: Performance Application Programming Interface
Name: papi
Version: 7.1.0
Release: 6%{?dist}
Release: 6%{?dist}.alma.1
License: BSD-3-Clause
Requires: papi-libs = %{version}-%{release}
URL: http://icl.cs.utk.edu/papi/
@ -23,6 +23,9 @@ Source0: http://icl.cs.utk.edu/projects/papi/downloads/%{name}-%{version}.tar.gz
Patch1: papi-python3.patch
Patch5: papi-nostatic.patch
Patch6: papi-libsde.patch
# AlmaLinux Patch
Patch1001: papi-riscv64.patch
BuildRequires: make
BuildRequires: autoconf
BuildRequires: doxygen
@ -94,6 +97,9 @@ the PAPI user-space libraries and interfaces.
%prep
%setup -q
# Applying AlmaLinux Patch
%patch -P 1001 -p1 -b .papi-riscv64
%patch 1 -p1 -b .python3
%patch 5 -p1
%patch 6 -p1 -b .flags
@ -191,6 +197,9 @@ find %{buildroot} -type f -executable ! -iname "*.py" ! -iname "*.sh" | xargs ch
%endif
%changelog
* Thu Aug 21 2025 Andrew Lukoshko <alukoshko@almalinux.org> - 7.1.0-6.alma.1
- Add initial RISC-V support
* Tue Oct 29 2024 Troy Dawson <tdawson@redhat.com> - 7.1.0-6
- Bump release for October 2024 mass rebuild:
Resolves: RHEL-64018