[PATCH v12 07/37] x86/fred: Add Kconfig option for FRED (CONFIG_X86_FRED)

Xin Li
2023-10-03T06:55:40Z

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>
Tested-by: Shan Kang <shan.kang@intel.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 433f5e1906d1..5ef2f6fe0681 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -496,6 +496,15 @@ 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"
--
2.34.1