From 6877642528074a0275b869c7d7b1207652e66f44 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Attila=20F=C3=BCl=C3=B6p?= <attila@fueloep.org>
Date: Wed, 1 Mar 2023 19:29:47 +0100
Subject: [PATCH] Use XRSTOR with XSAVEC
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Signed-off-by: Attila Fülöp <attila@fueloep.org>
---
 include/os/linux/kernel/linux/simd_x86.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/os/linux/kernel/linux/simd_x86.h b/include/os/linux/kernel/linux/simd_x86.h
index ff4e2466d5..bd987f08c9 100644
--- a/include/os/linux/kernel/linux/simd_x86.h
+++ b/include/os/linux/kernel/linux/simd_x86.h
@@ -378,6 +378,13 @@ static inline void
 kfpu_end(void)
 {
 	uint8_t  *state = zfs_kfpu_fpregs[smp_processor_id()];
+
+#if defined(HAVE_XSAVEC)
+	if (static_cpu_has(X86_FEATURE_XSAVEC)) {
+		kfpu_do_xrstor("xrstor", state, ~0);
+		goto out;
+	}
+#endif
 #if defined(HAVE_XSAVES)
 	if (static_cpu_has(X86_FEATURE_XSAVES)) {
 		kfpu_do_xrstor("xrstors", state, ~0);