diff mbox series

[5/6] x86/entry/32: Remove SEP test for SYSEXIT

Message ID 20230718134446.168654-6-brgerst@gmail.com
State New
Headers
Series x86: Clean up fast syscall return validation |

Commit Message

Brian Gerst July 18, 2023, 1:44 p.m. UTC 
  SEP must be already be present in order for do_fast_syscall_32() to be
called on native 32-bit, so checking it again is unnecessary.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
---
 arch/x86/entry/common.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c
index 15660f936ede..fca6f2b7daf3 100644
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -275,8 +275,7 @@  __visible noinstr bool do_fast_syscall_32(struct pt_regs *regs)
 	 * We don't allow syscalls at all from VM86 mode, but we still
 	 * need to check VM, because we might be returning from sys_vm86.
 	 */
-	return static_cpu_has(X86_FEATURE_SEP) &&
-		regs->cs == __USER_CS && regs->ss == __USER_DS &&
+	return regs->cs == __USER_CS && regs->ss == __USER_DS &&
 		regs->ip == landing_pad &&
 		(regs->flags & (X86_EFLAGS_RF | X86_EFLAGS_TF | X86_EFLAGS_VM)) == 0;
 #endif