[llvm] [llvm-exegesis] [AArch64] Add support for Load Instructions in subprocess execution mode (PR #144895)

[Sjoerd Meijer via llvm-commits]

================
@@ -155,6 +286,156 @@ class ExegesisAArch64Target : public ExegesisTarget {
 
 } // namespace
 
+#ifdef __linux__
+// true : let use of fixed address to Virtual Address Space Ceiling
+// false: let kernel choose the address of the auxiliary memory
+bool UseFixedAddress = true;
+
+static constexpr const uintptr_t VAddressSpaceCeiling = 0x0000800000000000;
----------------
sjoerdmeijer wrote:

I am not that familiar with the memory map. For folks with the same problem, can you comment and document where this number comes from?

https://github.com/llvm/llvm-project/pull/144895