From: Vasileios Almpanis <vasileios.almpanis@virtuozzo.com>
To: Konstantin Khorenko <khorenko@virtuozzo.com>
Cc: devel@openvz.org
Subject: Re: [Devel] [PATCH hci-8.1 v6 2/5] x86/ve: enable CPUID faulting at once when the current task enters a VE
Date: Thu, 08 Oct 2026 10:18:09 +0000 [thread overview]
Message-ID: <179145468915.66332.16248889747749637196.b4-review@b4> (raw)
In-Reply-To: <20261007-b4-prep-khorenko-vstor-148656-cpuid-v6-2-a8eb906e69b8@virtuozzo.com>
> ve_setup_task() only sets TIF_CPUID_OVERRIDE. The MSR follows the flag
> in __switch_to_xtra(), so a task that enters a VE through unshare() or
> setns() keeps executing CPUID natively until it is scheduled out for the
> first time and sees the host values instead of the override table.
>
> Add set_cpuid_override(), which sets the flag and, like disable_cpuid(),
> flips the CPU state synchronously when the task is the current one.
> Tasks set up through clone() are not running yet and are still handled
> at their first switch-in.
>
> https://virtuozzo.atlassian.net/browse/VSTOR-148843
>
> Feature: x86: cpu pools (cpuid override)
NIT: Fixes tag? Should be the same as patch 4 no?
--
Vasileios Almpanis <vasileios.almpanis@virtuozzo.com>
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next prev parent reply other threads:[~2026-10-08 10:19 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-07 11:57 [Devel] [PATCH hci-8.1 v6 0/5] x86/ve: CPUID override follow-ups: arm at once, prefixes, selftests Konstantin Khorenko
2026-10-07 11:57 ` [Devel] [PATCH hci-8.1 v6 1/5] selftests/ve: check CPUID override emulation for VE tasks Konstantin Khorenko
2026-10-07 12:04 ` no-reply
2026-10-07 13:16 ` Konstantin Khorenko
2026-10-07 11:57 ` [Devel] [PATCH hci-8.1 v6 2/5] x86/ve: enable CPUID faulting at once when the current task enters a VE Konstantin Khorenko
2026-10-07 12:02 ` no-reply
2026-10-08 10:18 ` Vasileios Almpanis [this message]
2026-10-08 13:38 ` Konstantin Khorenko
2026-10-07 11:57 ` [Devel] [PATCH hci-8.1 v6 3/5] selftests/ve: check CPUID override right after entering " Konstantin Khorenko
2026-10-07 12:03 ` no-reply
2026-10-07 11:57 ` [Devel] [PATCH hci-8.1 v6 4/5] x86/traps: decode the faulting CPUID with the instruction decoder Konstantin Khorenko
2026-10-07 12:04 ` no-reply
2026-10-07 11:57 ` [Devel] [PATCH hci-8.1 v6 5/5] selftests/ve: check CPUID override emulation for a prefixed CPUID Konstantin Khorenko
2026-10-07 12:04 ` no-reply
2026-10-08 10:18 ` [Devel] [PATCH hci-8.1 v6 0/5] x86/ve: CPUID override follow-ups: arm at once, prefixes, selftests Vasileios Almpanis
2026-10-08 13:39 ` Konstantin Khorenko
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