• Bruce Rogers's avatar
    KVM: x86: fix ordering of cr0 initialization code in vmx_cpu_reset · f2463247
    Bruce Rogers authored
    Commit d28bc9dd reversed the order of two lines which initialize cr0,
    allowing the current (old) cr0 value to mess up vcpu initialization.
    This was observed in the checks for cr0 X86_CR0_WP bit in the context of
    kvm_mmu_reset_context(). Besides, setting vcpu->arch.cr0 after vmx_set_cr0()
    is completely redundant. Change the order back to ensure proper vcpu
    initialization.
    
    The combination of booting with ovmf firmware when guest vcpus > 1 and kvm's
    ept=N option being set results in a VM-entry failure. This patch fixes that.
    
    Fixes: d28bc9dd ("KVM: x86: INIT and reset sequences are different")
    Cc: stable@vger.kernel.org
    Signed-off-by: default avatarBruce Rogers <brogers@suse.com>
    Signed-off-by: default avatarRadim Krčmář <rkrcmar@redhat.com>
    f2463247
vmx.c 311 KB