Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Subject: Re: [PATCH v4 0/8] arm64: IRQ priority masking and Pseudo-NMI fixes
To:     Julien Thierry <julien.thierry@arm.com>,
        linux-arm-kernel@lists.infradead.org
Cc:     linux-kernel@vger.kernel.org, rostedt@goodmis.org,
        yuzenghui@huawei.com, wanghaibin.wang@huawei.com,
        james.morse@arm.com, will.deacon@arm.com, catalin.marinas@arm.com,
        mark.rutland@arm.com, liwei391@huawei.com
References: <1560245893-46998-1-git-send-email-julien.thierry@arm.com>
From:   Marc Zyngier <marc.zyngier@arm.com>
Openpgp: preference=signencrypt
Autocrypt: addr=marc.zyngier@arm.com; prefer-encrypt=mutual; keydata=
 mQINBE6Jf0UBEADLCxpix34Ch3kQKA9SNlVQroj9aHAEzzl0+V8jrvT9a9GkK+FjBOIQz4KE
 g+3p+lqgJH4NfwPm9H5I5e3wa+Scz9wAqWLTT772Rqb6hf6kx0kKd0P2jGv79qXSmwru28vJ
 t9NNsmIhEYwS5eTfCbsZZDCnR31J6qxozsDHpCGLHlYym/VbC199Uq/pN5gH+5JHZyhyZiNW
 ozUCjMqC4eNW42nYVKZQfbj/k4W9xFfudFaFEhAf/Vb1r6F05eBP1uopuzNkAN7vqS8XcgQH
 qXI357YC4ToCbmqLue4HK9+2mtf7MTdHZYGZ939OfTlOGuxFW+bhtPQzsHiW7eNe0ew0+LaL
 3wdNzT5abPBscqXWVGsZWCAzBmrZato+Pd2bSCDPLInZV0j+rjt7MWiSxEAEowue3IcZA++7
 ifTDIscQdpeKT8hcL+9eHLgoSDH62SlubO/y8bB1hV8JjLW/jQpLnae0oz25h39ij4ijcp8N
 t5slf5DNRi1NLz5+iaaLg4gaM3ywVK2VEKdBTg+JTg3dfrb3DH7ctTQquyKun9IVY8AsxMc6
 lxl4HxrpLX7HgF10685GG5fFla7R1RUnW5svgQhz6YVU33yJjk5lIIrrxKI/wLlhn066mtu1
 DoD9TEAjwOmpa6ofV6rHeBPehUwMZEsLqlKfLsl0PpsJwov8TQARAQABtCNNYXJjIFp5bmdp
 ZXIgPG1hcmMuenluZ2llckBhcm0uY29tPokCTwQTAQIAOQIbAwYLCQgHAwIGFQgCCQoLBBYC
 AwECHgECF4AWIQSf1RxT4LVjGP2VnD0j0NC60T16QwUCXO+WxgAKCRAj0NC60T16QzfuEACd
 oPsSJdUg3nm61VKq86Pp0mfCC5IVyD/vTDw3jDErsmtT7t8mMVgidSJe9cMEudLO5xske/mY
 sC7ZZ4GFNRRsFs3wY5g+kg4yk2UY6q18HXRQJwzWCug2bkJPUxbh71nS3KPsvq4BBOeQiTIX
 Xr0lTyReFAp+JZ0HpanAU/iD2usEZLDNLXYLRjaHlfkwouxt02XcTKbqRWNtKl3Ybj+mz5IA
 qEQnA5Z8Nt9ZQmlZ4ASiXVVCbZKIR3RewBL6BP4OhYrvcPCtkoqlqKWZoHBs3ZicRXvcVUr/
 nqUyZpqhmfht2mIE063L3kTfBqxJ1SQqPc0ZIModTh4ATEjC44x8ObQvtnmgL8EKJBhxJfjY
 EUYLnwSejH1h+qgj94vn7n1RMVqXpCrWHyF7pCDBqq3gBxtDu6TWgi4iwh4CtdOzXBw2V39D
 LlnABnrZl5SdVbRwV+Ek1399s/laceH8e4uNea50ho89WmP9AUCrXlawHohfDE3GMOV4BdQ2
 DbJAtZnENQXaRK9gr86jbGQBga9VDvsBbRd+uegEmQ8nPspryWIz/gDRZLXIG8KE9Jj9OhwE
 oiusVTLsw7KS4xKDK2Ixb/XGtJPLtUXbMM1n9YfLsB5JPZ3B08hhrv+8Vmm734yCXtxI0+7B
 F1V4T2njuJKWTsmJWmx+tIY8y9muUK9rabkCDQROiX9FARAAz/al0tgJaZ/eu0iI/xaPk3DK
 NIvr9SsKFe2hf3CVjxriHcRfoTfriycglUwtvKvhvB2Y8pQuWfLtP9Hx3H+YI5a78PO2tU1C
 JdY5Momd3/aJBuUFP5blbx6n+dLDepQhyQrAp2mVC3NIp4T48n4YxL4Og0MORytWNSeygISv
 Rordw7qDmEsa7wgFsLUIlhKmmV5VVv+wAOdYXdJ9S8n+XgrxSTgHj5f3QqkDtT0yG8NMLLmY
 kZpOwWoMumeqn/KppPY/uTIwbYTD56q1UirDDB5kDRL626qm63nF00ByyPY+6BXH22XD8smj
 f2eHw2szECG/lpD4knYjxROIctdC+gLRhz+Nlf8lEHmvjHgiErfgy/lOIf+AV9lvDF3bztjW
 M5oP2WGeR7VJfkxcXt4JPdyDIH6GBK7jbD7bFiXf6vMiFCrFeFo/bfa39veKUk7TRlnX13go
 gIZxqR6IvpkG0PxOu2RGJ7Aje/SjytQFa2NwNGCDe1bH89wm9mfDW3BuZF1o2+y+eVqkPZj0
 mzfChEsiNIAY6KPDMVdInILYdTUAC5H26jj9CR4itBUcjE/tMll0n2wYRZ14Y/PM+UosfAhf
 YfN9t2096M9JebksnTbqp20keDMEBvc3KBkboEfoQLU08NDo7ncReitdLW2xICCnlkNIUQGS
 WlFVPcTQ2sMAEQEAAYkCHwQYAQIACQUCTol/RQIbDAAKCRAj0NC60T16QwsFD/9T4y30O0Wn
 MwIgcU8T2c2WwKbvmPbaU2LDqZebHdxQDemX65EZCv/NALmKdA22MVSbAaQeqsDD5KYbmCyC
 czilJ1i+tpZoJY5kJALHWWloI6Uyi2s1zAwlMktAZzgGMnI55Ifn0dAOK0p8oy7/KNGHNPwJ
 eHKzpHSRgysQ3S1t7VwU4mTFJtXQaBFMMXg8rItP5GdygrFB7yUbG6TnrXhpGkFBrQs9p+SK
 vCqRS3Gw+dquQ9QR+QGWciEBHwuSad5gu7QC9taN8kJQfup+nJL8VGtAKgGr1AgRx/a/V/QA
 ikDbt/0oIS/kxlIdcYJ01xuMrDXf1jFhmGZdocUoNJkgLb1iFAl5daV8MQOrqciG+6tnLeZK
 HY4xCBoigV7E8KwEE5yUfxBS0yRreNb+pjKtX6pSr1Z/dIo+td/sHfEHffaMUIRNvJlBeqaj
 BX7ZveskVFafmErkH7HC+7ErIaqoM4aOh/Z0qXbMEjFsWA5yVXvCoJWSHFImL9Bo6PbMGpI0
 9eBrkNa1fd6RGcktrX6KNfGZ2POECmKGLTyDC8/kb180YpDJERN48S0QBa3Rvt06ozNgFgZF
 Wvu5Li5PpY/t/M7AAkLiVTtlhZnJWyEJrQi9O2nXTzlG1PeqGH2ahuRxn7txA5j5PHZEZdL1
 Z46HaNmN2hZS/oJ69c1DI5Rcww==
Organization: ARM Ltd
Message-ID: <e90e7ab1-1c30-de1f-80de-5b86f99cb78b@arm.com>
Date:   Tue, 11 Jun 2019 14:28:15 +0100
User-Agent: Mozilla/5.0 (X11; Linux aarch64; rv:60.0) Gecko/20100101
 Thunderbird/60.7.0
MIME-Version: 1.0
In-Reply-To: <1560245893-46998-1-git-send-email-julien.thierry@arm.com>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hi Julien,

On 11/06/2019 10:38, Julien Thierry wrote:
> Hi,
> 
> Version one[1] of this series attempted to fix the issue reported by
> Zenghui[2] when using the function_graph tracer with IRQ priority
> masking.
> 
> Since then, I realized that priority masking and the use of Pseudo-NMIs
> was more broken than I thought.
> 
> * Patch 1-2 are just some cleanup
> * Patch 3 fixes a potential issue with not clobbering condition flags
>   in irqflags operations
> * Patch 4 fixes an issue where calling C code in Pseudo-NMI before
>   entering NMI enter could lead to potential races
> * Patch 5 fixes the function_graph issue when using priority masking
> * Patch 6 introduces some debug to hopefully avoid breaking things in
>   the future
> * Patch 7 is a rebased version of the patch sent by Wei Li[3] fixing
>   an error that can happen during on some platform using the priority
>   masking feature
> * Patch 8 re-enables the Pseudo-NMI selection
> 
> Changes since V3 [4]:
> - Rebase on v5.2-rc4
> - Fix comments/typos/missed updates
> - Use single condition evalution for nmi_enter and nmi_exit

Thanks for following up on this. For the whole series:

Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>

	M.
-- 
Jazz is not dead. It just smells funny...