1 files changed, 0 insertions, 50 deletions

diff --git a/recipes-extended/xen/files/xen-arm64-implement-atomic-fetch-add.patch b/recipes-extended/xen/files/xen-arm64-implement-atomic-fetch-add.patch
deleted file mode 100644
index 6e957a50..00000000
--- a/recipes-extended/xen/files/xen-arm64-implement-atomic-fetch-add.patch
+++ /dev/null
@@ -1,50 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Christopher Clark <christopher.w.clark@gmail.com>
-Date: Fri, 26 June 2020 16:34:00 -0800
-Subject: [PATCH] xen: implement atomic op to fix arm64 compilation
-
-Xen's ARM implementation of arch_fetch_and_add since f9cc3cd9
-uses a builtin, despite the build being performed with -fno-builtin.
-With gcc 10.1.0, this now breaks prelinking spinlock.c, so
-implement the one atomic operation that is required with logic
-derived from Linux's atomic_ll_sc.h: ATOMIC_FETCH_OP and comparison with
-the binary produced with and without the patch with gcc 9.2.0.
-
-Signed-off-by: Christopher Clark <christopher.w.clark@gmail.com>
-diff --git a/xen/include/asm-arm/system.h b/xen/include/asm-arm/system.h
-index e5d062667d..c46dd3ac71 100644
---- a/xen/include/asm-arm/system.h
-+++ b/xen/include/asm-arm/system.h
-@@ -55,7 +55,32 @@ static inline int local_abort_is_enabled(void)
-     return !(flags & PSR_ABT_MASK);
- }
- 
-+#ifdef CONFIG_ARM_64
-+
-+/* see atomic_ll_sc.h:  ATOMIC_FETCH_OP(name, mb, acq, rel, cl, op, asm_op, constraint) */
-+static inline int arch_fetch_and_add(unsigned int *ptr, unsigned long i)
-+{
-+    int register lptr asm("x0");
-+    int register result asm("w1");
-+    int register newval asm("w2");
-+    int register status asm("w3");
-+
-+    asm volatile(
-+    "   mov       %[lptr], %[ptr]\n"
-+    "1: ldxr      %w[result], [%[lptr]]\n"
-+    "   add       %w[newval], %w[result], %w[i]\n"
-+    "   stlxr     %w[status], %w[newval], [%[lptr]]\n"
-+    "   cbnz      %w[status], 1b\n"
-+    "   dmb       ish\n"
-+    : [result] "=&r" (result), [lptr] "=&r" (lptr), [newval] "=&r" (newval), [status] "=&r" (status), [i] "+r" (i), "+Q" (*ptr)
-+    : [ptr] "r" (ptr), "r" (i)
-+    : "memory");
-+
-+    return result;
-+}
-+#else
- #define arch_fetch_and_add(x, v) __sync_fetch_and_add(x, v)
-+#endif
- 
- extern struct vcpu *__context_switch(struct vcpu *prev, struct vcpu *next);
-