Commit 23c682cc authored by Mark Brown's avatar Mark Brown Committed by yanhaitao
Browse files

arm64/signal: Always allocate SVE signal frames on SME only systems 

mainline inclusion
from mainline-v6.2-rc4
commit f26cd737
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8E73O
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f26cd7372160da2eba31061d7943348ab9f2c01d



-------------------------------------------------

Currently we only allocate space for SVE signal frames on systems that
support SVE, meaning that SME only systems do not allocate a signal frame
for streaming mode SVE state. Change the check so space is allocated if
either feature is supported.

Fixes: 85ed24da ("arm64/sme: Implement streaming SVE signal handling")
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20221223-arm64-fix-sme-only-v1-3-938d663f69e5@kernel.org


Signed-off-by: default avatarWill Deacon <will@kernel.org>
Signed-off-by: default avatarWang ShaoBo <bobo.shaobowang@huawei.com>
parent 3ba063a2

arch/arm64/kernel/signal.c

+1 −1
Original line number Diff line number Diff line
@@ -593,7 +593,7 @@ int setup_sigframe_layout(struct rt_sigframe_user_layout *user, bool add_all) 
			return err;

	}



	if (system_supports_sve()) {

	if (system_supports_sve() || system_supports_sme()) {

		unsigned int vq = 0;



		if (add_all || test_thread_flag(TIF_SVE) ||