diff --git a/xen/arch/riscv/include/asm/atomic.h b/xen/arch/riscv/include/asm/atomic.h
new file mode 100644
index 0000000000..4964821f3a
--- /dev/null
+++ b/xen/arch/riscv/include/asm/atomic.h
@@ -0,0 +1,263 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Taken and modified from Linux.
+ *
+ * The following changes were done:
+ * - * atomic##prefix##_*xchg_*(atomic##prefix##_t *v, c_t n) were updated
+ *     to use__*xchg_generic()
+ * - drop casts in write_atomic() as they are unnecessary
+ * - drop introduction of WRITE_ONCE() and READ_ONCE().
+ *   Xen provides ACCESS_ONCE()
+ * - remove zero-length array access in read_atomic()
+ * - drop defines similar to pattern
+ *   #define atomic_add_return_relaxed   atomic_add_return_relaxed
+ * - move not RISC-V specific functions to asm-generic/atomics-ops.h
+ * 
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2012 Regents of the University of California
+ * Copyright (C) 2017 SiFive
+ * Copyright (C) 2024 Vates SAS
+ */
+
+#ifndef _ASM_RISCV_ATOMIC_H
+#define _ASM_RISCV_ATOMIC_H
+
+#include <xen/atomic.h>
+
+#include <asm/cmpxchg.h>
+#include <asm/fence.h>
+#include <asm/io.h>
+#include <asm/system.h>
+
+void __bad_atomic_size(void);
+
+/*
+ * Legacy from Linux kernel. For some reason they wanted to have ordered
+ * read/write access. Thereby read* is used instead of read<X>_cpu()
+ */
+static always_inline void read_atomic_size(const volatile void *p,
+                                           void *res,
+                                           unsigned int size)
+{
+    switch ( size )
+    {
+    case 1: *(uint8_t *)res = readb(p); break;
+    case 2: *(uint16_t *)res = readw(p); break;
+    case 4: *(uint32_t *)res = readl(p); break;
+    case 8: *(uint32_t *)res  = readq(p); break;
+    default: __bad_atomic_size(); break;
+    }
+}
+
+#define read_atomic(p) ({                                   \
+    union { typeof(*(p)) val; char c[sizeof(*(p))]; } x_;   \
+    read_atomic_size(p, x_.c, sizeof(*(p)));                \
+    x_.val;                                                 \
+})
+
+#define write_atomic(p, x)                              \
+({                                                      \
+    typeof(*(p)) x__ = (x);                             \
+    switch ( sizeof(*(p)) )                             \
+    {                                                   \
+    case 1: writeb(x__, p); break;                      \
+    case 2: writew(x__, p); break;                      \
+    case 4: writel(x__, p); break;                      \
+    case 8: writeq(x__, p); break;                      \
+    default: __bad_atomic_size(); break;                \
+    }                                                   \
+    x__;                                                \
+})
+
+#define add_sized(p, x)                                 \
+({                                                      \
+    typeof(*(p)) x__ = (x);                             \
+    switch ( sizeof(*(p)) )                             \
+    {                                                   \
+    case 1: writeb(read_atomic(p) + x__, p); break;     \
+    case 2: writew(read_atomic(p) + x__, p); break;     \
+    case 4: writel(read_atomic(p) + x__, p); break;     \
+    case 8: writeq(read_atomic(p) + x__, p); break;     \
+    default: __bad_atomic_size(); break;                \
+    }                                                   \
+})
+
+#define __atomic_acquire_fence() \
+    asm volatile ( RISCV_ACQUIRE_BARRIER "" ::: "memory" )
+
+#define __atomic_release_fence() \
+    asm volatile ( RISCV_RELEASE_BARRIER "" ::: "memory" )
+
+/*
+ * First, the atomic ops that have no ordering constraints and therefor don't
+ * have the AQ or RL bits set.  These don't return anything, so there's only
+ * one version to worry about.
+ */
+#define ATOMIC_OP(op, asm_op, I, asm_type, c_type, prefix)  \
+static inline                                               \
+void atomic##prefix##_##op(c_type i, atomic##prefix##_t *v) \
+{                                                           \
+    asm volatile (                                          \
+        "   amo" #asm_op "." #asm_type " zero, %1, %0"      \
+        : "+A" (v->counter)                                 \
+        : "r" (I)                                           \
+        : "memory" );                                       \
+}                                                           \
+
+/*
+ * Only CONFIG_GENERIC_ATOMIC64=y was ported to Xen that is the reason why
+ * last argument for ATOMIC_OP isn't used.
+ */
+#define ATOMIC_OPS(op, asm_op, I)                           \
+        ATOMIC_OP (op, asm_op, I, w, int,   )
+
+ATOMIC_OPS(add, add,  i)
+ATOMIC_OPS(sub, add, -i)
+ATOMIC_OPS(and, and,  i)
+ATOMIC_OPS( or,  or,  i)
+ATOMIC_OPS(xor, xor,  i)
+
+#undef ATOMIC_OP
+#undef ATOMIC_OPS
+
+#include <asm-generic/atomic-ops.h>
+
+/*
+ * Atomic ops that have ordered, relaxed, acquire, and release variants.
+ * There's two flavors of these: the arithmatic ops have both fetch and return
+ * versions, while the logical ops only have fetch versions.
+ */
+#define ATOMIC_FETCH_OP(op, asm_op, I, asm_type, c_type, prefix)    \
+static inline                                                       \
+c_type atomic##prefix##_fetch_##op##_relaxed(c_type i,              \
+                         atomic##prefix##_t *v)                     \
+{                                                                   \
+    register c_type ret;                                            \
+    asm volatile (                                                  \
+        "   amo" #asm_op "." #asm_type " %1, %2, %0"                \
+        : "+A" (v->counter), "=r" (ret)                             \
+        : "r" (I)                                                   \
+        : "memory" );                                               \
+    return ret;                                                     \
+}                                                                   \
+static inline                                                       \
+c_type atomic##prefix##_fetch_##op(c_type i, atomic##prefix##_t *v) \
+{                                                                   \
+    register c_type ret;                                            \
+    asm volatile (                                                  \
+        "   amo" #asm_op "." #asm_type ".aqrl  %1, %2, %0"          \
+        : "+A" (v->counter), "=r" (ret)                             \
+        : "r" (I)                                                   \
+        : "memory" );                                               \
+    return ret;                                                     \
+}
+
+#define ATOMIC_OP_RETURN(op, asm_op, c_op, I, asm_type, c_type, prefix) \
+static inline                                                           \
+c_type atomic##prefix##_##op##_return_relaxed(c_type i,                 \
+                          atomic##prefix##_t *v)                        \
+{                                                                       \
+        return atomic##prefix##_fetch_##op##_relaxed(i, v) c_op I;      \
+}                                                                       \
+static inline                                                           \
+c_type atomic##prefix##_##op##_return(c_type i, atomic##prefix##_t *v)  \
+{                                                                       \
+        return atomic##prefix##_fetch_##op(i, v) c_op I;                \
+}
+
+/*
+ * Only CONFIG_GENERIC_ATOMIC64=y was ported to Xen that is the reason why
+ * last argument of ATOMIC_FETCH_OP, ATOMIC_OP_RETURN isn't used.
+ */
+#define ATOMIC_OPS(op, asm_op, c_op, I)                                 \
+        ATOMIC_FETCH_OP( op, asm_op,       I, w, int,   )               \
+        ATOMIC_OP_RETURN(op, asm_op, c_op, I, w, int,   )
+
+ATOMIC_OPS(add, add, +,  i)
+ATOMIC_OPS(sub, add, +, -i)
+
+#undef ATOMIC_OPS
+
+#define ATOMIC_OPS(op, asm_op, I) \
+        ATOMIC_FETCH_OP(op, asm_op, I, w, int,   )
+
+ATOMIC_OPS(and, and, i)
+ATOMIC_OPS( or,  or, i)
+ATOMIC_OPS(xor, xor, i)
+
+#undef ATOMIC_OPS
+
+#undef ATOMIC_FETCH_OP
+#undef ATOMIC_OP_RETURN
+
+/* This is required to provide a full barrier on success. */
+static inline int atomic_add_unless(atomic_t *v, int a, int u)
+{
+       int prev, rc;
+
+    asm volatile (
+        "0: lr.w     %[p],  %[c]\n"
+        "   beq      %[p],  %[u], 1f\n"
+        "   add      %[rc], %[p], %[a]\n"
+        "   sc.w.rl  %[rc], %[rc], %[c]\n"
+        "   bnez     %[rc], 0b\n"
+        RISCV_FULL_BARRIER
+        "1:\n"
+        : [p] "=&r" (prev), [rc] "=&r" (rc), [c] "+A" (v->counter)
+        : [a] "r" (a), [u] "r" (u)
+        : "memory");
+    return prev;
+}
+
+/*
+ * atomic_{cmp,}xchg is required to have exactly the same ordering semantics as
+ * {cmp,}xchg and the operations that return.
+ */
+#define ATOMIC_OP(c_t, prefix, size)                            \
+static inline                                                   \
+c_t atomic##prefix##_xchg(atomic##prefix##_t *v, c_t n)         \
+{                                                               \
+    return __xchg(&(v->counter), n, size);                      \
+}                                                               \
+static inline                                                   \
+c_t atomic##prefix##_cmpxchg(atomic##prefix##_t *v, c_t o, c_t n) \
+{                                                               \
+    return __cmpxchg(&v->counter, o, n, size);                  \
+}
+
+#define ATOMIC_OPS() \
+    ATOMIC_OP(int,   , 4)
+
+ATOMIC_OPS()
+
+#undef ATOMIC_OPS
+#undef ATOMIC_OP
+
+static inline int atomic_sub_if_positive(atomic_t *v, int offset)
+{
+       int prev, rc;
+
+    asm volatile (
+        "0: lr.w     %[p],  %[c]\n"
+        "   sub      %[rc], %[p], %[o]\n"
+        "   bltz     %[rc], 1f\n"
+        "   sc.w.rl  %[rc], %[rc], %[c]\n"
+        "   bnez     %[rc], 0b\n"
+        "   fence    rw, rw\n"
+        "1:\n"
+        : [p] "=&r" (prev), [rc] "=&r" (rc), [c] "+A" (v->counter)
+        : [o] "r" (offset)
+        : "memory" );
+    return prev - offset;
+}
+
+#endif /* _ASM_RISCV_ATOMIC_H */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/xen/include/asm-generic/atomic-ops.h b/xen/include/asm-generic/atomic-ops.h
new file mode 100644
index 0000000000..da1ea5aac2
--- /dev/null
+++ b/xen/include/asm-generic/atomic-ops.h
@@ -0,0 +1,97 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * The header provides default implementations for every xen/atomic.h-provided
+ * forward inline declaration that can be synthesized from other atomic
+ * functions.
+ */
+#ifndef _ASM_GENERIC_ATOMIC_OPS_H_
+#define _ASM_GENERIC_ATOMIC_OPS_H_
+
+#include <xen/atomic.h>
+#include <xen/lib.h>
+
+#ifndef ATOMIC_READ
+static inline int atomic_read(const atomic_t *v)
+{
+    return ACCESS_ONCE(v->counter);
+}
+#endif
+
+#ifndef _ATOMIC_READ
+static inline int _atomic_read(atomic_t v)
+{
+    return v.counter;
+}
+#endif
+
+#ifndef ATOMIC_SET
+static inline void atomic_set(atomic_t *v, int i)
+{
+    ACCESS_ONCE(v->counter) = i;
+}
+#endif
+
+#ifndef _ATOMIC_SET
+static inline void _atomic_set(atomic_t *v, int i)
+{
+    v->counter = i;
+}
+#endif
+
+#ifndef ATOMIC_SUB_AND_TEST
+static inline int atomic_sub_and_test(int i, atomic_t *v)
+{
+    return atomic_sub_return(i, v) == 0;
+}
+#endif
+
+#ifndef ATOMIC_INC
+static inline void atomic_inc(atomic_t *v)
+{
+    atomic_add(1, v);
+}
+#endif
+
+#ifndef ATOMIC_INC_RETURN
+static inline int atomic_inc_return(atomic_t *v)
+{
+    return atomic_add_return(1, v);
+}
+#endif
+
+#ifndef ATOMIC_DEC
+static inline void atomic_dec(atomic_t *v)
+{
+    atomic_sub(1, v);
+}
+#endif
+
+#ifndef ATOMIC_DEC_RETURN
+static inline int atomic_dec_return(atomic_t *v)
+{
+    return atomic_sub_return(1, v);
+}
+#endif
+
+#ifndef ATOMIC_DEC_AND_TEST
+static inline int atomic_dec_and_test(atomic_t *v)
+{
+    return atomic_sub_return(1, v) == 0;
+}
+#endif
+
+#ifndef ATOMIC_ADD_NEGATIVE
+static inline int atomic_add_negative(int i, atomic_t *v)
+{
+    return atomic_add_return(i, v) < 0;
+}
+#endif
+
+#ifndef ATOMIC_INC_AND_TEST
+static inline int atomic_inc_and_test(atomic_t *v)
+{
+    return atomic_add_return(1, v) == 0;
+}
+#endif
+
+#endif /* _ASM_GENERIC_ATOMIC_OPS_H_ */
