[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen stable-4.16] x86/vmx: Drop spec_ctrl load in VMEntry path
commit e253d0a65cca3770f404241f2435791b61159cd6 Author: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> AuthorDate: Tue Feb 1 13:34:49 2022 +0000 Commit: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> CommitDate: Fri Feb 4 15:45:24 2022 +0000 x86/vmx: Drop spec_ctrl load in VMEntry path This is not needed now that the VMEntry path is not responsible for loading the guest's MSR_SPEC_CTRL value. Fixes: 81f0eaadf84d ("x86/spec-ctrl: Fix NMI race condition with VT-x MSR_SPEC_CTRL handling") Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx> (cherry picked from commit 9ce3ef20b4f085a7dc8ee41b0fec6fdeced3773e) --- xen/arch/x86/hvm/vmx/entry.S | 3 --- 1 file changed, 3 deletions(-) diff --git a/xen/arch/x86/hvm/vmx/entry.S b/xen/arch/x86/hvm/vmx/entry.S index 7ee3382fd0..49651f3c43 100644 --- a/xen/arch/x86/hvm/vmx/entry.S +++ b/xen/arch/x86/hvm/vmx/entry.S @@ -85,9 +85,6 @@ UNLIKELY_END(realmode) test %al, %al jz .Lvmx_vmentry_restart - mov VCPU_arch_msrs(%rbx), %rax - mov VCPUMSR_spec_ctrl_raw(%rax), %eax - /* WARNING! `ret`, `call *`, `jmp *` not safe beyond this point. */ /* SPEC_CTRL_EXIT_TO_VMX Req: %rsp=regs/cpuinfo Clob: */ ALTERNATIVE "", __stringify(verw CPUINFO_verw_sel(%rsp)), X86_FEATURE_SC_VERW_HVM -- generated by git-patchbot for /home/xen/git/xen.git#stable-4.16
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