From: Catalin Marinas <catalin.marinas@arm.com>
To: Steven Price <steven.price@arm.com>
Cc: Marc Zyngier <maz@kernel.org>, Will Deacon <will@kernel.org>,
James Morse <james.morse@arm.com>,
Julien Thierry <julien.thierry.kdev@gmail.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Dave Martin <Dave.Martin@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Thomas Gleixner <tglx@linutronix.de>,
qemu-devel@nongnu.org, Juan Quintela <quintela@redhat.com>,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
Richard Henderson <richard.henderson@linaro.org>,
Peter Maydell <peter.maydell@linaro.org>,
Haibo Xu <Haibo.Xu@arm.com>, Andrew Jones <drjones@redhat.com>
Subject: Re: [PATCH v13 3/8] arm64: mte: Sync tags for pages where PTE is untagged
Date: Thu, 3 Jun 2021 15:20:23 +0100 [thread overview]
Message-ID: <20210603142023.GC20338@arm.com> (raw)
In-Reply-To: <20210524104513.13258-4-steven.price@arm.com>
On Mon, May 24, 2021 at 11:45:08AM +0100, Steven Price wrote:
> A KVM guest could store tags in a page even if the VMM hasn't mapped
> the page with PROT_MTE. So when restoring pages from swap we will
> need to check to see if there are any saved tags even if !pte_tagged().
>
> However don't check pages for which pte_access_permitted() returns false
> as these will not have been swapped out.
>
> Signed-off-by: Steven Price <steven.price@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
WARNING: multiple messages have this Message-ID (diff)
From: Catalin Marinas <catalin.marinas@arm.com>
To: Steven Price <steven.price@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
Peter Maydell <peter.maydell@linaro.org>,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
Andrew Jones <drjones@redhat.com>, Haibo Xu <Haibo.Xu@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
qemu-devel@nongnu.org, Marc Zyngier <maz@kernel.org>,
Juan Quintela <quintela@redhat.com>,
Richard Henderson <richard.henderson@linaro.org>,
linux-kernel@vger.kernel.org, Dave Martin <Dave.Martin@arm.com>,
James Morse <james.morse@arm.com>,
linux-arm-kernel@lists.infradead.org,
Thomas Gleixner <tglx@linutronix.de>,
Will Deacon <will@kernel.org>,
kvmarm@lists.cs.columbia.edu,
Julien Thierry <julien.thierry.kdev@gmail.com>
Subject: Re: [PATCH v13 3/8] arm64: mte: Sync tags for pages where PTE is untagged
Date: Thu, 3 Jun 2021 15:20:23 +0100 [thread overview]
Message-ID: <20210603142023.GC20338@arm.com> (raw)
In-Reply-To: <20210524104513.13258-4-steven.price@arm.com>
On Mon, May 24, 2021 at 11:45:08AM +0100, Steven Price wrote:
> A KVM guest could store tags in a page even if the VMM hasn't mapped
> the page with PROT_MTE. So when restoring pages from swap we will
> need to check to see if there are any saved tags even if !pte_tagged().
>
> However don't check pages for which pte_access_permitted() returns false
> as these will not have been swapped out.
>
> Signed-off-by: Steven Price <steven.price@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
WARNING: multiple messages have this Message-ID (diff)
From: Catalin Marinas <catalin.marinas@arm.com>
To: Steven Price <steven.price@arm.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>,
qemu-devel@nongnu.org, Marc Zyngier <maz@kernel.org>,
Juan Quintela <quintela@redhat.com>,
Richard Henderson <richard.henderson@linaro.org>,
linux-kernel@vger.kernel.org, Dave Martin <Dave.Martin@arm.com>,
linux-arm-kernel@lists.infradead.org,
Thomas Gleixner <tglx@linutronix.de>,
Will Deacon <will@kernel.org>,
kvmarm@lists.cs.columbia.edu
Subject: Re: [PATCH v13 3/8] arm64: mte: Sync tags for pages where PTE is untagged
Date: Thu, 3 Jun 2021 15:20:23 +0100 [thread overview]
Message-ID: <20210603142023.GC20338@arm.com> (raw)
In-Reply-To: <20210524104513.13258-4-steven.price@arm.com>
On Mon, May 24, 2021 at 11:45:08AM +0100, Steven Price wrote:
> A KVM guest could store tags in a page even if the VMM hasn't mapped
> the page with PROT_MTE. So when restoring pages from swap we will
> need to check to see if there are any saved tags even if !pte_tagged().
>
> However don't check pages for which pte_access_permitted() returns false
> as these will not have been swapped out.
>
> Signed-off-by: Steven Price <steven.price@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
WARNING: multiple messages have this Message-ID (diff)
From: Catalin Marinas <catalin.marinas@arm.com>
To: Steven Price <steven.price@arm.com>
Cc: Marc Zyngier <maz@kernel.org>, Will Deacon <will@kernel.org>,
James Morse <james.morse@arm.com>,
Julien Thierry <julien.thierry.kdev@gmail.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Dave Martin <Dave.Martin@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Thomas Gleixner <tglx@linutronix.de>,
qemu-devel@nongnu.org, Juan Quintela <quintela@redhat.com>,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
Richard Henderson <richard.henderson@linaro.org>,
Peter Maydell <peter.maydell@linaro.org>,
Haibo Xu <Haibo.Xu@arm.com>, Andrew Jones <drjones@redhat.com>
Subject: Re: [PATCH v13 3/8] arm64: mte: Sync tags for pages where PTE is untagged
Date: Thu, 3 Jun 2021 15:20:23 +0100 [thread overview]
Message-ID: <20210603142023.GC20338@arm.com> (raw)
In-Reply-To: <20210524104513.13258-4-steven.price@arm.com>
On Mon, May 24, 2021 at 11:45:08AM +0100, Steven Price wrote:
> A KVM guest could store tags in a page even if the VMM hasn't mapped
> the page with PROT_MTE. So when restoring pages from swap we will
> need to check to see if there are any saved tags even if !pte_tagged().
>
> However don't check pages for which pte_access_permitted() returns false
> as these will not have been swapped out.
>
> Signed-off-by: Steven Price <steven.price@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-06-03 14:20 UTC|newest]
Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-24 10:45 [PATCH v13 0/8] MTE support for KVM guest Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` [PATCH v13 1/8] arm64: mte: Handle race when synchronising tags Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` [PATCH v13 2/8] arm64: Handle MTE tags zeroing in __alloc_zeroed_user_highpage() Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` [PATCH v13 3/8] arm64: mte: Sync tags for pages where PTE is untagged Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` Steven Price
2021-06-03 14:20 ` Catalin Marinas [this message]
2021-06-03 14:20 ` Catalin Marinas
2021-06-03 14:20 ` Catalin Marinas
2021-06-03 14:20 ` Catalin Marinas
2021-05-24 10:45 ` [PATCH v13 4/8] KVM: arm64: Introduce MTE VM feature Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` Steven Price
2021-06-03 16:00 ` Catalin Marinas
2021-06-03 16:00 ` Catalin Marinas
2021-06-03 16:00 ` Catalin Marinas
2021-06-03 16:00 ` Catalin Marinas
2021-06-04 9:01 ` Catalin Marinas
2021-06-04 9:01 ` Catalin Marinas
2021-06-04 9:01 ` Catalin Marinas
2021-06-04 9:01 ` Catalin Marinas
2021-06-04 10:42 ` Steven Price
2021-06-04 10:42 ` Steven Price
2021-06-04 10:42 ` Steven Price
2021-06-04 10:42 ` Steven Price
2021-06-04 11:36 ` Catalin Marinas
2021-06-04 11:36 ` Catalin Marinas
2021-06-04 11:36 ` Catalin Marinas
2021-06-04 11:36 ` Catalin Marinas
2021-06-04 12:51 ` Steven Price
2021-06-04 12:51 ` Steven Price
2021-06-04 12:51 ` Steven Price
2021-06-04 12:51 ` Steven Price
2021-06-04 14:05 ` Catalin Marinas
2021-06-04 14:05 ` Catalin Marinas
2021-06-04 14:05 ` Catalin Marinas
2021-06-04 14:05 ` Catalin Marinas
2021-05-24 10:45 ` [PATCH v13 5/8] KVM: arm64: Save/restore MTE registers Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` Steven Price
2021-06-03 16:48 ` Catalin Marinas
2021-06-03 16:48 ` Catalin Marinas
2021-06-03 16:48 ` Catalin Marinas
2021-06-03 16:48 ` Catalin Marinas
2021-05-24 10:45 ` [PATCH v13 6/8] KVM: arm64: Expose KVM_ARM_CAP_MTE Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` Steven Price
2021-06-03 16:58 ` Catalin Marinas
2021-06-03 16:58 ` Catalin Marinas
2021-06-03 16:58 ` Catalin Marinas
2021-06-03 16:58 ` Catalin Marinas
2021-05-24 10:45 ` [PATCH v13 7/8] KVM: arm64: ioctl to fetch/store tags in a guest Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` Steven Price
2021-06-03 17:13 ` Catalin Marinas
2021-06-03 17:13 ` Catalin Marinas
2021-06-03 17:13 ` Catalin Marinas
2021-06-03 17:13 ` Catalin Marinas
2021-06-04 11:15 ` Steven Price
2021-06-04 11:15 ` Steven Price
2021-06-04 11:15 ` Steven Price
2021-06-04 11:15 ` Steven Price
2021-06-04 11:42 ` Catalin Marinas
2021-06-04 11:42 ` Catalin Marinas
2021-06-04 11:42 ` Catalin Marinas
2021-06-04 11:42 ` Catalin Marinas
2021-06-04 13:09 ` Steven Price
2021-06-04 13:09 ` Steven Price
2021-06-04 13:09 ` Steven Price
2021-06-04 13:09 ` Steven Price
2021-06-04 15:34 ` Catalin Marinas
2021-06-04 15:34 ` Catalin Marinas
2021-06-04 15:34 ` Catalin Marinas
2021-06-04 15:34 ` Catalin Marinas
2021-05-24 10:45 ` [PATCH v13 8/8] KVM: arm64: Document MTE capability and ioctl Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` Steven Price
2021-05-24 10:45 ` Steven Price
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210603142023.GC20338@arm.com \
--to=catalin.marinas@arm.com \
--cc=Dave.Martin@arm.com \
--cc=Haibo.Xu@arm.com \
--cc=dgilbert@redhat.com \
--cc=drjones@redhat.com \
--cc=james.morse@arm.com \
--cc=julien.thierry.kdev@gmail.com \
--cc=kvmarm@lists.cs.columbia.edu \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=maz@kernel.org \
--cc=peter.maydell@linaro.org \
--cc=qemu-devel@nongnu.org \
--cc=quintela@redhat.com \
--cc=richard.henderson@linaro.org \
--cc=steven.price@arm.com \
--cc=suzuki.poulose@arm.com \
--cc=tglx@linutronix.de \
--cc=will@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.