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Re: [PATCH for-4.21??? 2/3] x86/vLAPIC: drop VLAPIC_VERSION
- To: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 9 Oct 2025 09:21:32 +0200
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- Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Andrew Cooper <amc96@xxxxxxxx>, Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>, Grygorii Strashko <grygorii_strashko@xxxxxxxx>
- Delivery-date: Thu, 09 Oct 2025 07:21:42 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 08.10.2025 18:23, Roger Pau Monné wrote:
> On Wed, Oct 08, 2025 at 02:08:48PM +0200, Jan Beulich wrote:
>> @@ -1439,7 +1438,7 @@ static void vlapic_do_init(struct vlapic
>> if ( !has_vlapic(vlapic_vcpu(vlapic)->domain) )
>> return;
>>
>> - vlapic_set_reg(vlapic, APIC_LVR, VLAPIC_VERSION);
>> + vlapic_set_reg(vlapic, APIC_LVR, 0x00050014);
>
> (Maybe I'm getting ahead of patch 3, as I haven't looked yet)
>
> Don't we want to use some kind of macros to build this in a more
> friendly way?
>
> We could have a pair of SET_APIC_{VERSION,MAXLVT}()?
With what patch 3 does to apicdef.h, I was rather wondering whether to simply
use two MASK_INSR() here (patch 3 already uses one right now).
Jan
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