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([2a01:e34:ed2f:f020:6971:b700:3764:fa96]) by smtp.googlemail.com with ESMTPSA id m126sm5866401wmm.0.2020.11.12.01.56.17 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 12 Nov 2020 01:56:18 -0800 (PST) Subject: Re: [PATCH v2 05/17] clocksource/hyperv: use MSR-based access if running as root To: Wei Liu , Linux on Hyper-V List Cc: virtualization@lists.linux-foundation.org, Linux Kernel List , Michael Kelley , Vineeth Pillai , Sunil Muthuswamy , Nuno Das Neves , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Thomas Gleixner References: <20201105165814.29233-1-wei.liu@kernel.org> <20201105165814.29233-6-wei.liu@kernel.org> From: Daniel Lezcano Message-ID: <3527e98a-faab-2360-f521-aa04bbe92edf@linaro.org> Date: Thu, 12 Nov 2020 10:56:17 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20201105165814.29233-6-wei.liu@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/11/2020 17:58, Wei Liu wrote: > Signed-off-by: Wei Liu > --- I would like to apply this patch but the changelog is too short (one line). Please add a small paragraph (no need to resend just answer here, I will amend the log myself. > drivers/clocksource/hyperv_timer.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/clocksource/hyperv_timer.c b/drivers/clocksource/hyperv_timer.c > index ba04cb381cd3..269a691bd2c4 100644 > --- a/drivers/clocksource/hyperv_timer.c > +++ b/drivers/clocksource/hyperv_timer.c > @@ -426,6 +426,9 @@ static bool __init hv_init_tsc_clocksource(void) > if (!(ms_hyperv.features & HV_MSR_REFERENCE_TSC_AVAILABLE)) > return false; > > + if (hv_root_partition) > + return false; > + > hv_read_reference_counter = read_hv_clock_tsc; > phys_addr = virt_to_phys(hv_get_tsc_page()); > > -- Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, NICE_REPLY_A,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B8905C55ABD for ; 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([2a01:e34:ed2f:f020:6971:b700:3764:fa96]) by smtp.googlemail.com with ESMTPSA id m126sm5866401wmm.0.2020.11.12.01.56.17 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 12 Nov 2020 01:56:18 -0800 (PST) Subject: Re: [PATCH v2 05/17] clocksource/hyperv: use MSR-based access if running as root To: Wei Liu , Linux on Hyper-V List References: <20201105165814.29233-1-wei.liu@kernel.org> <20201105165814.29233-6-wei.liu@kernel.org> From: Daniel Lezcano Message-ID: <3527e98a-faab-2360-f521-aa04bbe92edf@linaro.org> Date: Thu, 12 Nov 2020 10:56:17 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20201105165814.29233-6-wei.liu@kernel.org> Content-Language: en-US Cc: Stephen Hemminger , Haiyang Zhang , Linux Kernel List , Michael Kelley , Nuno Das Neves , Sunil Muthuswamy , virtualization@lists.linux-foundation.org, Vineeth Pillai , Thomas Gleixner X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" T24gMDUvMTEvMjAyMCAxNzo1OCwgV2VpIExpdSB3cm90ZToKPiBTaWduZWQtb2ZmLWJ5OiBXZWkg TGl1IDx3ZWkubGl1QGtlcm5lbC5vcmc+Cj4gLS0tCgpJIHdvdWxkIGxpa2UgdG8gYXBwbHkgdGhp cyBwYXRjaCBidXQgdGhlIGNoYW5nZWxvZyBpcyB0b28gc2hvcnQgKG9uZSBsaW5lKS4KClBsZWFz ZSBhZGQgYSBzbWFsbCBwYXJhZ3JhcGggKG5vIG5lZWQgdG8gcmVzZW5kIGp1c3QgYW5zd2VyIGhl cmUsIEkgd2lsbAphbWVuZCB0aGUgbG9nIG15c2VsZi4KCj4gIGRyaXZlcnMvY2xvY2tzb3VyY2Uv aHlwZXJ2X3RpbWVyLmMgfCAzICsrKwo+ICAxIGZpbGUgY2hhbmdlZCwgMyBpbnNlcnRpb25zKCsp Cj4gCj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvY2xvY2tzb3VyY2UvaHlwZXJ2X3RpbWVyLmMgYi9k cml2ZXJzL2Nsb2Nrc291cmNlL2h5cGVydl90aW1lci5jCj4gaW5kZXggYmEwNGNiMzgxY2QzLi4y NjlhNjkxYmQyYzQgMTAwNjQ0Cj4gLS0tIGEvZHJpdmVycy9jbG9ja3NvdXJjZS9oeXBlcnZfdGlt ZXIuYwo+ICsrKyBiL2RyaXZlcnMvY2xvY2tzb3VyY2UvaHlwZXJ2X3RpbWVyLmMKPiBAQCAtNDI2 LDYgKzQyNiw5IEBAIHN0YXRpYyBib29sIF9faW5pdCBodl9pbml0X3RzY19jbG9ja3NvdXJjZSh2 b2lkKQo+ICAJaWYgKCEobXNfaHlwZXJ2LmZlYXR1cmVzICYgSFZfTVNSX1JFRkVSRU5DRV9UU0Nf QVZBSUxBQkxFKSkKPiAgCQlyZXR1cm4gZmFsc2U7Cj4gIAo+ICsJaWYgKGh2X3Jvb3RfcGFydGl0 aW9uKQo+ICsJCXJldHVybiBmYWxzZTsKPiArCj4gIAlodl9yZWFkX3JlZmVyZW5jZV9jb3VudGVy ID0gcmVhZF9odl9jbG9ja190c2M7Cj4gIAlwaHlzX2FkZHIgPSB2aXJ0X3RvX3BoeXMoaHZfZ2V0 X3RzY19wYWdlKCkpOwo+ICAKPiAKCgotLSAKPGh0dHA6Ly93d3cubGluYXJvLm9yZy8+IExpbmFy by5vcmcg4pSCIE9wZW4gc291cmNlIHNvZnR3YXJlIGZvciBBUk0gU29DcwoKRm9sbG93IExpbmFy bzogIDxodHRwOi8vd3d3LmZhY2Vib29rLmNvbS9wYWdlcy9MaW5hcm8+IEZhY2Vib29rIHwKPGh0 dHA6Ly90d2l0dGVyLmNvbS8jIS9saW5hcm9vcmc+IFR3aXR0ZXIgfAo8aHR0cDovL3d3dy5saW5h cm8ub3JnL2xpbmFyby1ibG9nLz4gQmxvZwpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fXwpWaXJ0dWFsaXphdGlvbiBtYWlsaW5nIGxpc3QKVmlydHVhbGl6YXRp b25AbGlzdHMubGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRp b24ub3JnL21haWxtYW4vbGlzdGluZm8vdmlydHVhbGl6YXRpb24=