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 Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 022F2C433F5 for ; Thu, 5 May 2022 00:17:17 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.321179.542133 (Exim 4.92) (envelope-from ) id 1nmPB5-0000KZ-Cw; Thu, 05 May 2022 00:17:07 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 321179.542133; Thu, 05 May 2022 00:17:07 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1nmPB5-0000Hm-08; Thu, 05 May 2022 00:17:07 +0000 Received: by outflank-mailman (input) for mailman id 321179; Thu, 05 May 2022 00:17:04 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1nmPB2-0007ib-IW for xen-devel@lists.xenproject.org; Thu, 05 May 2022 00:17:04 +0000 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id ae66ea89-cc08-11ec-a406-831a346695d4; Thu, 05 May 2022 02:17:01 +0200 (CEST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id A6C5F61D46; Thu, 5 May 2022 00:16:59 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 11B62C385B2; Thu, 5 May 2022 00:16:59 +0000 (UTC) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: ae66ea89-cc08-11ec-a406-831a346695d4 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1651709819; bh=E9MSaccIsafpyB3w94QGDZQ01xMK5vlE5XQ9xApFP8Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZWuCYpHaMtY1a2m/mVJcnt9ZaoqlCQSly0zRsecEpEhEUv00xb6ysU98BpbbGmHNo mzpC1T5eGczmunbZKFCKKv1Quulp+Zb2yKj2z+fiwcVzWPCP6RCcZ3UoAFAiCyLPAz d8ey2GVFPYrXVjdFmpVgUOmYaIFBNnOM/YLB076Ca/eUDTlH4UXQW8AkNx8D6B+Z+X iTI2DvKEqMYy4AuTBH4y2j8ZerRGDL3u92wHfUU4N4Y/YUL8eLW9Ui7MiX2brKHgRo YWy6rfud5XG8LbyQgZ+mgXr0J07dgQiY8GTusa6e/ReyR7U44UWmPZ+K5Tj7r5nkPg itZEpo81JhRyg== From: Stefano Stabellini To: xen-devel@lists.xenproject.org Cc: sstabellini@kernel.org, jgross@suse.com, Bertrand.Marquis@arm.com, julien@xen.org, Volodymyr_Babchuk@epam.com, Luca Miccio , Stefano Stabellini , Bertrand Marquis , jbeulich@suse.com Subject: [PATCH v6 4/7] xen/arm: configure dom0less domain for enabling xenstore after boot Date: Wed, 4 May 2022 17:16:53 -0700 Message-Id: <20220505001656.395419-4-sstabellini@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Luca Miccio Export evtchn_alloc_unbound and make it __must_check. If "xen,enhanced" is enabled, then add to dom0less domains: - the hypervisor node in device tree - the xenstore event channel The xenstore event channel is also used for the first notification to let the guest know that xenstore has become available. Signed-off-by: Luca Miccio Signed-off-by: Stefano Stabellini Reviewed-by: Bertrand Marquis CC: Julien Grall CC: Volodymyr Babchuk CC: Bertrand Marquis CC: jbeulich@suse.com --- Changes in v5: - merge with "xen: export evtchn_alloc_unbound" - __must_check Changes in v3: - use evtchn_alloc_unbound Changes in v2: - set HVM_PARAM_STORE_PFN to ~0ULL at domain creation - in alloc_xenstore_evtchn do not call _evtchn_alloc_unbound xen: export evtchn_alloc_unbound It will be used during dom0less domains construction. Signed-off-by: Stefano Stabellini --- xen/arch/arm/domain_build.c | 37 +++++++++++++++++++++++++++++++++++++ xen/common/event_channel.c | 2 +- xen/include/xen/event.h | 3 +++ 3 files changed, 41 insertions(+), 1 deletion(-) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index 016f56a99f..bb430f2189 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include @@ -2810,6 +2811,8 @@ static int __init prepare_dtb_domU(struct domain *d, struct kernel_info *kinfo) int ret; kinfo->phandle_gic = GUEST_PHANDLE_GIC; + kinfo->gnttab_start = GUEST_GNTTAB_BASE; + kinfo->gnttab_size = GUEST_GNTTAB_SIZE; addrcells = GUEST_ROOT_ADDRESS_CELLS; sizecells = GUEST_ROOT_SIZE_CELLS; @@ -2884,6 +2887,13 @@ static int __init prepare_dtb_domU(struct domain *d, struct kernel_info *kinfo) goto err; } + if ( kinfo->dom0less_enhanced ) + { + ret = make_hypervisor_node(d, kinfo, addrcells, sizecells); + if ( ret ) + goto err; + } + ret = fdt_end_node(kinfo->fdt); if ( ret < 0 ) goto err; @@ -3150,6 +3160,25 @@ static int __init construct_domain(struct domain *d, struct kernel_info *kinfo) return 0; } +static int __init alloc_xenstore_evtchn(struct domain *d) +{ + evtchn_alloc_unbound_t alloc; + int rc; + + alloc.dom = d->domain_id; + alloc.remote_dom = hardware_domain->domain_id; + rc = evtchn_alloc_unbound(&alloc); + if ( rc ) + { + printk("Failed allocating event channel for domain\n"); + return rc; + } + + d->arch.hvm.params[HVM_PARAM_STORE_EVTCHN] = alloc.port; + + return 0; +} + static int __init construct_domU(struct domain *d, const struct dt_device_node *node) { @@ -3214,6 +3243,14 @@ static int __init construct_domU(struct domain *d, if ( rc < 0 ) return rc; + if ( kinfo.dom0less_enhanced ) + { + rc = alloc_xenstore_evtchn(d); + if ( rc < 0 ) + return rc; + d->arch.hvm.params[HVM_PARAM_STORE_PFN] = ~0ULL; + } + return rc; } diff --git a/xen/common/event_channel.c b/xen/common/event_channel.c index 0a82eb3ac2..e60cd98d75 100644 --- a/xen/common/event_channel.c +++ b/xen/common/event_channel.c @@ -290,7 +290,7 @@ void evtchn_free(struct domain *d, struct evtchn *chn) xsm_evtchn_close_post(chn); } -static int evtchn_alloc_unbound(evtchn_alloc_unbound_t *alloc) +int evtchn_alloc_unbound(evtchn_alloc_unbound_t *alloc) { struct evtchn *chn; struct domain *d; diff --git a/xen/include/xen/event.h b/xen/include/xen/event.h index 21c95e14fd..f3021fe304 100644 --- a/xen/include/xen/event.h +++ b/xen/include/xen/event.h @@ -71,6 +71,9 @@ void evtchn_free(struct domain *d, struct evtchn *chn); /* Allocate a specific event channel port. */ int evtchn_allocate_port(struct domain *d, unsigned int port); +/* Allocate a new event channel */ +int __must_check evtchn_alloc_unbound(evtchn_alloc_unbound_t *alloc); + /* Unmask a local event-channel port. */ int evtchn_unmask(unsigned int port); -- 2.25.1