From: "Xin Li (Intel)" <xin@zytor.com>
To: linux-kernel@vger.kernel.org
Cc: luto@kernel.org, tglx@linutronix.de, mingo@redhat.com,
bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org,
hpa@zytor.com, xin@zytor.com
Subject: [PATCH v1 1/1] x86/entry/fred: Push __KERNEL_CS directly
Date: Fri, 22 Aug 2025 00:16:44 -0700 [thread overview]
Message-ID: <20250822071644.1405268-1-xin@zytor.com> (raw)
Push __KERNEL_CS directly, rather than moving it into RAX and then
pushing RAX.
Suggested-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Signed-off-by: Xin Li (Intel) <xin@zytor.com>
---
arch/x86/entry/entry_64_fred.S | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/x86/entry/entry_64_fred.S b/arch/x86/entry/entry_64_fred.S
index 907bd233c6c1..3c1511feadf7 100644
--- a/arch/x86/entry/entry_64_fred.S
+++ b/arch/x86/entry/entry_64_fred.S
@@ -97,8 +97,7 @@ SYM_FUNC_START(asm_fred_entry_from_kvm)
push %rdi /* fred_ss handed in by the caller */
push %rbp
pushf
- mov $__KERNEL_CS, %rax
- push %rax
+ push $__KERNEL_CS
/*
* Unlike the IDT event delivery, FRED _always_ pushes an error code
base-commit: 3da01ffe1aeaa0d427ab5235ba735226670a80d9
--
2.50.1
next reply other threads:[~2025-08-22 7:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-22 7:16 Xin Li (Intel) [this message]
2025-08-22 11:42 ` [tip: x86/cleanups] " tip-bot2 for Xin Li (Intel)
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