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KVM: vmx: fix VPID is 0000H in non-root operation
Reference SDM 28.1: The current VPID is 0000H in the following situations: - Outside VMX operation. (This includes operation in system-management mode under the default treatment of SMIs and SMM with VMX operation; see Section 34.14.) - In VMX root operation. - In VMX non-root operation when the “enable VPID” VM-execution control is 0. The VPID should never be 0000H in non-root operation when "enable VPID" VM-execution control is 1. However, commit34a1cd60
("kvm: x86: vmx: move some vmx setting from vmx_init() to hardware_setup()") remove the codes which reserve 0000H for VMX root operation. This patch fix it by again reserving 0000H for VMX root operation. Cc: stable@vger.kernel.org # 3.19+ Fixes:34a1cd60d1
Reported-by: Wincy Van <fanwenyi0529@gmail.com> Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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@ -6064,6 +6064,8 @@ static __init int hardware_setup(void)
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memcpy(vmx_msr_bitmap_longmode_x2apic,
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vmx_msr_bitmap_longmode, PAGE_SIZE);
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set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */
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if (enable_apicv) {
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for (msr = 0x800; msr <= 0x8ff; msr++)
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vmx_disable_intercept_msr_read_x2apic(msr);
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