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From: Xin Li <xin3.li@intel.com>
To: linux-kernel@vger.kernel.org, x86@kernel.org, kvm@vger.kernel.org
Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
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Subject: [RFC PATCH v3 10/32] x86/fred: add Kconfig option for FRED
(CONFIG_X86_FRED)
Date: Thu, 23 Feb 2023 23:01:23 -0800
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| Series |
x86: enable FRED for x86-64
|
|
Commit Message
Li, Xin3
Feb. 24, 2023, 7:01 a.m. UTC
From: "H. Peter Anvin (Intel)" <hpa@zytor.com> Add the configuration option CONFIG_X86_FRED to enable FRED. Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com> Signed-off-by: Xin Li <xin3.li@intel.com> --- arch/x86/Kconfig | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index a825bf031f49..da62178bb246 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -500,6 +500,15 @@ config X86_CPU_RESCTRL Say N if unsure. +config X86_FRED + bool "Flexible Return and Event Delivery" + depends on X86_64 + help + When enabled, try to use Flexible Return and Event Delivery + instead of the legacy SYSCALL/SYSENTER/IDT architecture for + ring transitions and exception/interrupt handling if the + system supports. + if X86_32 config X86_BIGSMP bool "Support for big SMP systems with more than 8 CPUs"