Messages in this thread Patch in this message | | | From | Brian Gerst <> | Subject | [PATCH v2 5/6] x86/entry/32: Remove SEP test for SYSEXIT | Date | Fri, 21 Jul 2023 12:10:16 -0400 |
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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 --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c index 5b3594457af3..4d7d6d25dda9 100644 --- a/arch/x86/entry/common.c +++ b/arch/x86/entry/common.c @@ -265,8 +265,7 @@ __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 -- 2.41.0
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