From: sashiko-bot@kernel.org
To: "Zack Rusin" <zack.rusin@broadcom.com>
Cc: linux-hyperv@vger.kernel.org, kvm@vger.kernel.org,
"Eugenio Perez" <eperezma@redhat.com>,
virtualization@lists.linux.dev,
"Michael S. Tsirkin" <mst@redhat.com>
Subject: Re: [PATCH v2 3/6] x86/percpu: Require embedded allocation in encrypted guests
Date: Tue, 29 Sep 2026 04:07:30 +0000 [thread overview]
Message-ID: <20260929040730.DFEF31F000FF@smtp.kernel.org> (raw)
In-Reply-To: <20260929040256.543767-4-zack.rusin@broadcom.com>
> Early sharing needs direct-mapped per-CPU storage. In TDX, a private
> direct-map alias of a shared page can terminate the guest, including
> through load_unaligned_zeropad(). Require embed rather than adding early
> vmalloc conversion and alias synchronization.
>
> Warn when overriding percpu_alloc=page and let embed failures reach the
> existing panic. Restrict this policy to encrypted guests, leaving host
> SME allocation unchanged.
>
> Suggested-by: Kiryl Shutsemau <kas@kernel.org>
> Link: https://lore.kernel.org/r/aqvxQoIoYhJTZpAC@thinkstation
> Signed-off-by: Zack Rusin <zack.rusin@broadcom.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260929040256.543767-1-zack.rusin@broadcom.com?part=3
next prev parent reply other threads:[~2026-09-29 4:07 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-29 4:02 [PATCH v2 0/6] x86/percpu: Share decrypted storage before guest setup Zack Rusin
2026-09-29 4:02 ` [PATCH v2 1/6] percpu: Page-align decrypted data in UP kernels Zack Rusin
2026-09-29 4:09 ` sashiko-bot
2026-09-29 4:02 ` [PATCH v2 2/6] percpu: Bound decrypted storage for all x86 encrypted guests Zack Rusin
2026-09-29 4:12 ` sashiko-bot
2026-09-29 7:54 ` Peter Zijlstra
2026-09-29 17:12 ` Zack Rusin
2026-09-30 8:54 ` Peter Zijlstra
2026-09-29 4:02 ` [PATCH v2 3/6] x86/percpu: Require embedded allocation in " Zack Rusin
2026-09-29 4:07 ` sashiko-bot [this message]
2026-09-29 4:02 ` [PATCH v2 4/6] x86/mm: Provide common early memory decryption Zack Rusin
2026-09-29 4:14 ` sashiko-bot
2026-09-29 4:02 ` [PATCH v2 5/6] x86/tdx: Support early sharing of kernel data Zack Rusin
2026-09-29 4:14 ` sashiko-bot
2026-09-29 4:02 ` [PATCH v2 6/6] x86/percpu: Share decrypted storage before guest CPU setup Zack Rusin
2026-09-29 4:14 ` sashiko-bot
2026-09-29 5:39 ` [PATCH v2 0/6] x86/percpu: Share decrypted storage before guest setup Borislav Petkov
2026-09-29 17:25 ` Zack Rusin
2026-10-01 23:59 ` Borislav Petkov
2026-10-02 6:06 ` Zack Rusin
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