Linux-ARM-Kernel Archive on lore.kernel.org
 help / color / Atom feed
From: Jeremy Linton <jeremy.linton@arm.com>
To: Stefan Wahren <stefan.wahren@i2se.com>,
	linux-arm-kernel@lists.infradead.org
Cc: mlangsdo@redhat.com, julien.thierry@arm.com,
	marc.zyngier@arm.com, catalin.marinas@arm.com,
	suzuki.poulose@arm.com, will.deacon@arm.com,
	linux-kernel@vger.kernel.org, steven.price@arm.com,
	ykaukab@suse.de, dave.martin@arm.com, shankerd@codeaurora.org
Subject: Re: [PATCH v3 0/7] arm64: add system vulnerability sysfs entries
Date: Tue, 15 Jan 2019 15:21:44 -0600
Message-ID: <c99f5da9-259c-3fc5-6150-7327ba0ff429@arm.com> (raw)
In-Reply-To: <884332236.499392.1547581848222@email.ionos.de>

Hi,

On 01/15/2019 01:50 PM, Stefan Wahren wrote:
> Hi Jeremy,
> 
>> Jeremy Linton <jeremy.linton@arm.com> hat am 10. Januar 2019 um 00:55 geschrieben:
>>
>>
>> Arm64 machines should be displaying a human readable
>> vulnerability status to speculative execution attacks in
>> /sys/devices/system/cpu/vulnerabilities
>>
>> This series enables that behavior by providing the expected
>> functions. Those functions expose the cpu errata and feature
>> states, as well as whether firmware is responding appropriately
>> to display the overall machine status. This means that in a
>> heterogeneous machine we will only claim the machine is mitigated
>> or safe if we are confident all booted cores are safe or
>> mitigated.
>>
> 
> i applied this v3 series and Marc's v2 series.
> 
> Now i'm getting the following on a Raspberry Pi 3 B+ :
> 
> meltdown:Not affected
> spec_store_bypass:Not affected
> spectre_v1:Mitigation: __user pointer sanitization
> 
> So the entries l1tf and spectre_v2 disappeared.

Yes, the l1tf entry should be gone.

I believe there is a problem with the "1/2 advertise.." patch in that 
the 'arm64_requested_vuln_attrs |=' line needs to be hoisted  to the top 
of check_branch_predictor() and the '__spectrev2_safe = false' line 
needs to be hoisted 6 lines immediately above "/* Fallback to firmware 
detection*/"

That should re-enable the spectre_v2 entry.




_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply index

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-09 23:55 Jeremy Linton
2019-01-09 23:55 ` [PATCH v3 1/7] sysfs/cpu: Allow individual architectures to select vulnerabilities Jeremy Linton
2019-01-14 10:02   ` Suzuki K Poulose
2019-01-18 15:46     ` Greg KH
2019-01-18 16:31       ` Jeremy Linton
2019-01-09 23:55 ` [PATCH v3 2/7] arm64: add sysfs vulnerability show for spectre v1 Jeremy Linton
2019-01-09 23:55 ` [PATCH v3 3/7] arm64: kpti: move check for non-vulnerable CPUs to a function Jeremy Linton
2019-01-12 10:41   ` Stefan Wahren
2019-01-14 11:32   ` Suzuki K Poulose
2019-01-18 16:35     ` Jeremy Linton
2019-01-09 23:55 ` [PATCH v3 4/7] arm64: add sysfs vulnerability show for meltdown Jeremy Linton
2019-01-10  9:23   ` Julien Thierry
2019-01-10 14:10     ` Jeremy Linton
2019-01-10 14:16       ` Julien Thierry
2019-01-09 23:55 ` [PATCH v3 5/7] arm64: add sysfs vulnerability show for spectre v2 Jeremy Linton
2019-01-09 23:55 ` [PATCH v3 6/7] arm64: add sysfs vulnerability show for speculative store bypass Jeremy Linton
2019-01-14 10:15   ` Marc Zyngier
2019-01-14 16:37     ` Jeremy Linton
2019-01-14 17:05       ` Marc Zyngier
2019-01-09 23:55 ` [PATCH v3 7/7] arm64: enable generic CPU vulnerabilites support Jeremy Linton
2019-01-15 19:50 ` [PATCH v3 0/7] arm64: add system vulnerability sysfs entries Stefan Wahren
2019-01-15 21:21   ` Jeremy Linton [this message]
2019-01-18 18:05     ` Stefan Wahren
2019-01-18 22:22       ` Jeremy Linton
2019-01-19 11:52         ` Stefan Wahren

Reply instructions:

You may reply publically 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=c99f5da9-259c-3fc5-6150-7327ba0ff429@arm.com \
    --to=jeremy.linton@arm.com \
    --cc=catalin.marinas@arm.com \
    --cc=dave.martin@arm.com \
    --cc=julien.thierry@arm.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=marc.zyngier@arm.com \
    --cc=mlangsdo@redhat.com \
    --cc=shankerd@codeaurora.org \
    --cc=stefan.wahren@i2se.com \
    --cc=steven.price@arm.com \
    --cc=suzuki.poulose@arm.com \
    --cc=will.deacon@arm.com \
    --cc=ykaukab@suse.de \
    /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

Linux-ARM-Kernel Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-arm-kernel/0 linux-arm-kernel/git/0.git
	git clone --mirror https://lore.kernel.org/linux-arm-kernel/1 linux-arm-kernel/git/1.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-arm-kernel linux-arm-kernel/ https://lore.kernel.org/linux-arm-kernel \
		linux-arm-kernel@lists.infradead.org infradead-linux-arm-kernel@archiver.kernel.org
	public-inbox-index linux-arm-kernel


Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.infradead.lists.linux-arm-kernel


AGPL code for this site: git clone https://public-inbox.org/ public-inbox