ltp: backport patch to fix compilation error for Skylake -march=x86-64-v3

When the input compiler enables AVX, stack realignment requirements
causes gcc to fail to omit %rbp use, due to which the test fails to
clobber %rbp in inline asm.  Disable AVX to build the test on x86_64 so
that the test continues working.

(From OE-Core rev: bbd3e7886e2ec5ab3578d618b28d007a80d917aa)

Signed-off-by: Yogesh Tyagi <yogesh.tyagi@intel.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/ltp/ltp/0001-cve-2015-3290-Disable-AVX-for-x86_64.patch

@@ -0,0 +1,42 @@
+From 28d823a63ee29f5d72c2aba781a06a7e2651cadc Mon Sep 17 00:00:00 2001
+From: Siddhesh Poyarekar <siddhesh@gotplt.org>
+Date: Mon, 7 Apr 2025 06:24:47 -0400
+Subject: [PATCH] cve-2015-3290: Disable AVX for x86_64
+
+When the input compiler enables AVX, stack realignment requirements
+causes gcc to fail to omit %rbp use, due to which the test fails to
+clobber %rbp in inline asm.  Disable AVX to build the test on x86_64 so
+that the test continues working.
+
+Link: https://lore.kernel.org/ltp/20250407102448.2605506-2-siddhesh@gotplt.org/
+
+Upstream-Status: Backport [https://github.com/linux-test-project/ltp/commit/28d823a63ee29f5d72c2aba781a06a7e2651cadc]
+
+Reviewed-by: Martin Doucha <mdoucha@suse.cz>
+Reviewed-by: Petr Vorel <pvorel@suse.cz>
+Signed-off-by: Siddhesh Poyarekar <siddhesh@gotplt.org>
+
+---
+ testcases/cve/Makefile | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/testcases/cve/Makefile b/testcases/cve/Makefile
+index 01b9b9ccb..98c38e908 100644
+--- a/testcases/cve/Makefile
++++ b/testcases/cve/Makefile
+@@ -22,6 +22,12 @@ ifneq (,$(filter $(HOST_CPU),x86 x86_64))
+ meltdown: CFLAGS += -msse2
+ endif
+ 
++# The test needs to clobber %rbp, which requires frame pointer omission.  Also
++# for x86_64, disable AVX since that could sometimes require a stack
++# realignment, which gets in the way of frame pointer omission.
+ cve-2015-3290:	CFLAGS += -pthread -fomit-frame-pointer
++ifeq ($(HOST_CPU),x86_64)
++cve-2015-3290: CFLAGS += -mno-avx
++endif
+ 
+ include $(top_srcdir)/include/mk/generic_leaf_target.mk
+-- 
+2.37.3
+

meta/recipes-extended/ltp/ltp_20250130.bb

@@ -30,6 +30,7 @@ SRC_URI = "git://github.com/linux-test-project/ltp.git;branch=master;protocol=ht
            file://0001-Remove-OOM-tests-from-runtest-mm.patch \
            file://0001-Add-__clear_cache-declaration-for-clang.patch \
            file://0001-kernel-kvm-don-t-hardcode-objcopy.patch \
+           file://0001-cve-2015-3290-Disable-AVX-for-x86_64.patch \
            "
 
 S = "${WORKDIR}/git"