[xen stable-4.16] x86/vmx: Drop spec_ctrl load in VMEntry path

[patchbot@xxxxxxx]

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