From patchwork Mon Apr 3 23:22:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nuno Das Neves X-Patchwork-Id: 78791 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:b0ea:0:b0:3b6:4342:cba0 with SMTP id b10csp2652579vqo; Mon, 3 Apr 2023 16:42:17 -0700 (PDT) X-Google-Smtp-Source: AKy350aW+OO/2FprsSZ5+a0U127RA1XMKSJatuc0om7+i+z+rRS2QSPigpxTdi8bMYvKpa7HIgwK X-Received: by 2002:a17:907:98a4:b0:932:ac6c:7ef9 with SMTP id ju4-20020a17090798a400b00932ac6c7ef9mr315891ejc.22.1680565336822; Mon, 03 Apr 2023 16:42:16 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1680565336; cv=none; d=google.com; s=arc-20160816; b=XptvmyKCC7DCDHIOC9uU/Kz/WNLuW5NpR7asGy6GZ4zQwc7U8rjSOKrBgGB6tDiy91 tfVl3Dwe6E9/DSQmoPdUkFviweJ7jRurUd1UqhepDHY+ePgUtZPkzCaD6MiY1OYe68an O0zy/+9swpsK4IJGotR5aU3HnIoQ6tlEnrRXqEq/Siv8uNlta1kAOoYyqlEWE8/87lgi gbPdnIRlUggiA5vfBJFONvU2dBO0nQ/MHFa2rCMgxsSw0cRkcy8AG2AV0YPkuh6E+gNu BFreDNLUNZeI5/nXhkTLDUBWc9fxrKMnuqW/UQB+EYJwDgE9h9T122Q6VpJfXA37ZNq0 7tzA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:message-id:date:subject:cc:to:from :dkim-signature:dkim-filter; bh=y3i3ILhMmxV1ebXDwdyEOEKLgDclYCNwTf+8O1DdSIY=; b=NPTkH4IebWGVVv6yQQqzT+0vBYxEk/HSn5DgvZeRVTJh3Yenj1aUItmx9aW+LzHOx+ 91jRGS6j5Qyskq6ReKcDpBfl9Nm7ZXJolg+zrbED5glbnaM94ANSsRiuhnzKFj33gdPP 3Gy8vQd6YEE5oSX5GmBO181FORInF4PLDc/6/HypYA2Y0/MMw4tiChFb2THL3k5VBhr+ PCtk8Q61/+pSk7ESeFCd9J8lPngCYw2d11FIyBvTQJ2jh30fG9uNvkVaG9NhbSUWSTU3 qXsACnNbOxwWskbnGEAk3CaYoJLqfpIM1evJvOPTBSoNSbbQ/IjwVLOZNRmyLEO0VsTW xoog== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linux.microsoft.com header.s=default header.b=JZ59pRik; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linux.microsoft.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id q5-20020a1709064c8500b0093d9b73f078si8337468eju.223.2023.04.03.16.41.53; Mon, 03 Apr 2023 16:42:16 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linux.microsoft.com header.s=default header.b=JZ59pRik; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linux.microsoft.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233174AbjDCXXN (ORCPT + 99 others); Mon, 3 Apr 2023 19:23:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52542 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232745AbjDCXXJ (ORCPT ); Mon, 3 Apr 2023 19:23:09 -0400 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id AB6FA10C; Mon, 3 Apr 2023 16:23:08 -0700 (PDT) Received: from linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net (linux.microsoft.com [13.77.154.182]) by linux.microsoft.com (Postfix) with ESMTPSA id 3C148210CBF2; Mon, 3 Apr 2023 16:23:08 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 3C148210CBF2 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1680564188; bh=y3i3ILhMmxV1ebXDwdyEOEKLgDclYCNwTf+8O1DdSIY=; h=From:To:Cc:Subject:Date:From; b=JZ59pRikh4gCot8Snc/748VAOZv2Rto3GGHicLk4hnI+99Km6WH75zI2DsTvgj+am IAbKMcgpIERqL8K45BbrcHwxJEya++Ol1B7eW2WaNIC3KeRUodmXwhnMnfY7zmJjhf l17luQKroD6tGj4Phh6ruCOa1jaer2dQTBbWsYaI= From: Nuno Das Neves To: linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Cc: mikelley@microsoft.com, kys@microsoft.com, wei.liu@kernel.org, haiyangz@microsoft.com, decui@microsoft.com Subject: [PATCH] Drivers: hv: Use nested hypercall for post message and signal event Date: Mon, 3 Apr 2023 16:22:58 -0700 Message-Id: <1680564178-31023-1-git-send-email-nunodasneves@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 X-Spam-Status: No, score=-17.9 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,ENV_AND_HDR_SPF_MATCH,RCVD_IN_DNSWL_MED,SPF_HELO_PASS, SPF_PASS,USER_IN_DEF_DKIM_WL,USER_IN_DEF_SPF_WL autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1762200478548604444?= X-GMAIL-MSGID: =?utf-8?q?1762200478548604444?= When running nested, these hypercalls must be sent to the L0 hypervisor or vmbus will fail. Only relevant for x86; nested functionality is not available in ARM64. Signed-off-by: Nuno Das Neves --- drivers/hv/connection.c | 4 ++++ drivers/hv/hv.c | 5 +++++ 2 files changed, 9 insertions(+) diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c index 9dc27e5d367a..04bf7f168976 100644 --- a/drivers/hv/connection.c +++ b/drivers/hv/connection.c @@ -539,6 +539,10 @@ void vmbus_set_event(struct vmbus_channel *channel) if (hv_isolation_type_snp()) hv_ghcb_hypercall(HVCALL_SIGNAL_EVENT, &channel->sig_event, NULL, sizeof(channel->sig_event)); +#if defined(CONFIG_X86_64) + else if (hv_nested) + hv_do_fast_nested_hypercall8(HVCALL_SIGNAL_EVENT, channel->sig_event); +#endif else hv_do_fast_hypercall8(HVCALL_SIGNAL_EVENT, channel->sig_event); } diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index 8b0dd8e5244d..c7f7652932ca 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -102,6 +102,11 @@ int hv_post_message(union hv_connection_id connection_id, status = hv_ghcb_hypercall(HVCALL_POST_MESSAGE, (void *)aligned_msg, NULL, sizeof(*aligned_msg)); +#if defined(CONFIG_X86_64) + else if (hv_nested) + status = hv_do_nested_hypercall(HVCALL_POST_MESSAGE, + aligned_msg, NULL); +#endif else status = hv_do_hypercall(HVCALL_POST_MESSAGE, aligned_msg, NULL);