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Re: [PATCH v2] x86/vmx: Use asm goto() in _vmx_cpu_up()


  • To: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Date: Wed, 2 Apr 2025 11:05:09 +0100
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  • Cc: Jan Beulich <JBeulich@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, dmkhn@xxxxxxxxx
  • Delivery-date: Wed, 02 Apr 2025 10:05:15 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 02/04/2025 10:56 am, Andrew Cooper wrote:
> diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c
> index 0ba65becec1e..8e99e6f73062 100644
> --- a/xen/arch/x86/hvm/vmx/vmcs.c
> +++ b/xen/arch/x86/hvm/vmx/vmcs.c
> @@ -785,6 +770,23 @@ static int _vmx_cpu_up(bool bsp)
>      vmx_pi_per_cpu_init(cpu);
>  
>      return 0;
> +
> + vmxon_fault:
> +    if ( bios_locked &&
> +         test_bit(X86_FEATURE_SMX, &boot_cpu_data.x86_capability) &&
> +         (!(eax & IA32_FEATURE_CONTROL_ENABLE_VMXON_OUTSIDE_SMX) ||
> +          !(eax & IA32_FEATURE_CONTROL_ENABLE_VMXON_INSIDE_SMX)) )
> +    {
> +        printk("CPU%d: VMXON failed: perhaps because of TXT settings "
> +               "in your BIOS configuration?\n", cpu);
> +        printk(" --> Disable TXT in your BIOS unless using a secure "
> +               "bootloader.\n");

Oh, I should remove the line splits, and put in some XENLOG_*.

~Andrew



 


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