This is a note to let you know that I've just added the patch titled
KVM: VMX: Move caching of MSR_IA32_XSS to hardware_setup()
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
kvm-vmx-move-caching-of-msr_ia32_xss-to-hardware_set.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 5ae9240c33846ae0c566bab68fd366a154218688
Author: Sean Christopherson <seanjc@xxxxxxxxxx>
Date: Mon Dec 3 13:52:59 2018 -0800
KVM: VMX: Move caching of MSR_IA32_XSS to hardware_setup()
[ Upstream commit 71d9409e20934e16f2d2ea88f0d1fb9851a7da3b ]
MSR_IA32_XSS has no relation to the VMCS whatsoever, it doesn't belong
in setup_vmcs_config() and its reference to host_xss prevents moving
setup_vmcs_config() to a dedicated file.
Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Stable-dep-of: a44b331614e6 ("KVM: x86/vmx: Do not skip segment attributes if unusable bit is set")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index f8ad29968e85..5c4d2758b1d9 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -4740,9 +4740,6 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
}
}
- if (boot_cpu_has(X86_FEATURE_XSAVES))
- rdmsrl(MSR_IA32_XSS, host_xss);
-
return 0;
}
@@ -7957,6 +7954,9 @@ static __init int hardware_setup(void)
WARN_ONCE(host_bndcfgs, "KVM: BNDCFGS in host will be lost");
}
+ if (boot_cpu_has(X86_FEATURE_XSAVES))
+ rdmsrl(MSR_IA32_XSS, host_xss);
+
if (!cpu_has_vmx_vpid() || !cpu_has_vmx_invvpid() ||
!(cpu_has_vmx_invvpid_single() || cpu_has_vmx_invvpid_global()))
enable_vpid = 0;
