From: no-reply@sashiko.virtuozzo.com
To: Konstantin Khorenko <khorenko@virtuozzo.com>,
Pavel Tikhomirov <ptikhomirov@virtuozzo.com>,
Vasileios Almpanis <vasileios.almpanis@virtuozzo.com>
Cc: devel@openvz.org
Subject: Re: [Devel] [PATCH hci-8.1 v5 2/5] x86/ve: enable CPUID faulting at once when the current task enters a VE
Date: Tue, 6 Oct 2026 22:59:11 +0000 [thread overview]
Message-ID: <010701a113713fce-e011eb0e-b868-446c-9329-c804947163ec-000000@eu-central-1.amazonses.com> (raw)
In-Reply-To: <20261007-b4-prep-khorenko-vstor-148656-cpuid-v5-2-652c5c9e56da@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)
> Signed-off-by: Konstantin Khorenko <khorenko@virtuozzo.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.vzint.dev/#/patchset/20261007-b4-prep-khorenko-vstor-148656-cpuid-v5-0-652c5c9e56da@virtuozzo.com?part=2
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next prev parent reply other threads:[~2026-10-06 23:00 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-06 22:54 [Devel] [PATCH hci-8.1 v5 0/5] x86/ve: CPUID override follow-ups: arm at once, prefixes, selftests Konstantin Khorenko
2026-10-06 22:54 ` [Devel] [PATCH hci-8.1 v5 1/5] selftests/ve: check CPUID override emulation for VE tasks Konstantin Khorenko
2026-10-06 23:03 ` no-reply
2026-10-06 22:54 ` [Devel] [PATCH hci-8.1 v5 2/5] x86/ve: enable CPUID faulting at once when the current task enters a VE Konstantin Khorenko
2026-10-06 22:59 ` no-reply [this message]
2026-10-06 22:54 ` [Devel] [PATCH hci-8.1 v5 3/5] selftests/ve: check CPUID override right after entering " Konstantin Khorenko
2026-10-06 23:00 ` no-reply
2026-10-06 22:54 ` [Devel] [PATCH hci-8.1 v5 4/5] x86/traps: decode the faulting CPUID with the instruction decoder Konstantin Khorenko
2026-10-06 23:01 ` no-reply
2026-10-06 22:54 ` [Devel] [PATCH hci-8.1 v5 5/5] selftests/ve: check CPUID override emulation for a prefixed CPUID Konstantin Khorenko
2026-10-06 23:03 ` no-reply
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