aarch64: Add Huawei Kunpeng to tunable cpu list

Kunpeng processer is a 64-bit Arm-compatible CPU released by Huawei,
and we have already signed a copyright assignement with the FSF.

This patch adds its to cpu list, and related macro for IFUNC.

Checked on aarch64-linux-gnu.

Reviewed-by: Szabolcs Nagy <Szabolcs.Nagy@arm.com>

manual/tunables.texi

@@ -372,7 +372,7 @@ This tunable is specific to powerpc, powerpc64 and powerpc64le.
 The @code{glibc.cpu.name=xxx} tunable allows the user to tell @theglibc{} to
 assume that the CPU is @code{xxx} where xxx may have one of these values:
 @code{generic}, @code{falkor}, @code{thunderxt88}, @code{thunderx2t99},
-@code{thunderx2t99p1}, @code{ares}, @code{emag}.
+@code{thunderx2t99p1}, @code{ares}, @code{emag}, @code{kunpeng}.
 
 This tunable is specific to aarch64.
 @end deftp

sysdeps/unix/sysv/linux/aarch64/cpu-features.c

@@ -38,6 +38,7 @@ static struct cpu_list cpu_list[] = {
       {"phecda",	 0x680F0000},
       {"ares",		 0x411FD0C0},
       {"emag",		 0x503F0001},
+      {"kunpeng", 	 0x481FD010},
       {"generic", 	 0x0}
 };
 

sysdeps/unix/sysv/linux/aarch64/cpu-features.h

@@ -57,6 +57,9 @@
 #define IS_EMAG(midr) (MIDR_IMPLEMENTOR(midr) == 'P'			      \
                        && MIDR_PARTNUM(midr) == 0x000)
 
+#define IS_KUNPENG(midr) (MIDR_IMPLEMENTOR(midr) == 'H'			   \
+                        && MIDR_PARTNUM(midr) == 0xd01)
+
 struct cpu_features
 {
   uint64_t midr_el1;