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Such hypercall won't have any practical effect on the domain, as the event channels would never be bound to PIRQs. Signed-off-by: Roger Pau Monn=C3=A9 --- xen/common/event_channel.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/xen/common/event_channel.c b/xen/common/event_channel.c index ffb042a241..bc4985706a 100644 --- a/xen/common/event_channel.c +++ b/xen/common/event_channel.c @@ -556,6 +556,9 @@ static int evtchn_bind_pirq(evtchn_bind_pirq_t *bind) int port =3D 0, rc; unsigned int pirq =3D bind->pirq; =20 + if ( is_hvm_domain(d) && !has_pirq(d) ) + return -ENOSYS; + if ( pirq >=3D d->nr_pirqs ) return -EINVAL; =20 --=20 2.34.1 From nobody Sat May 18 08:14:05 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; 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mx.microsoft.com 1; spf=pass smtp.mailfrom=citrix.com; dmarc=pass action=none header.from=citrix.com; dkim=pass header.d=citrix.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=citrix.onmicrosoft.com; s=selector2-citrix-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=v3ryk5q8FKUxx6AOhcSeGFHahYVASbk58h3VZK2SFNM=; b=HcFahv03F3OQhK7/7B9fk2QHciWsx2lCojHIJIx4Dv9OB/erMfuSUJLF2PdOH70msHGY/Rn3XYR6hYaVGPIlJnvhRnrlS/H+yagmNcWqiXGelpidpDvL7sPyiuLGzbt81xfDOTe76Tjn40LeIZ2C29+ah1NuyoGUSdSunzM/F/w= From: Roger Pau Monne To: CC: Roger Pau Monne , Jan Beulich , Andrew Cooper , Wei Liu Subject: [PATCH 2/3] hvm/irq: tighten check in hvm_domain_use_pirq Date: Thu, 3 Mar 2022 11:30:56 +0100 Message-ID: <20220303103057.49181-3-roger.pau@citrix.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220303103057.49181-1-roger.pau@citrix.com> References: <20220303103057.49181-1-roger.pau@citrix.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: LO2P265CA0186.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:a::30) To DS7PR03MB5608.namprd03.prod.outlook.com (2603:10b6:5:2c9::18) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 7d902a93-6ceb-4873-254e-08d9fd00f54c X-MS-TrafficTypeDiagnostic: SN6PR03MB4464:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Instead check whether the domain has PIRQ support in order to avoid further checks. No functional change intended. Signed-off-by: Roger Pau Monn=C3=A9 --- xen/arch/x86/hvm/irq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/xen/arch/x86/hvm/irq.c b/xen/arch/x86/hvm/irq.c index 5a7f39b54f..7c5dfd3c3a 100644 --- a/xen/arch/x86/hvm/irq.c +++ b/xen/arch/x86/hvm/irq.c @@ -30,7 +30,7 @@ =20 bool hvm_domain_use_pirq(const struct domain *d, const struct pirq *pirq) { - return is_hvm_domain(d) && pirq && pirq->arch.hvm.emuirq !=3D IRQ_UNBO= UND; + return has_pirq(d) && pirq && pirq->arch.hvm.emuirq !=3D IRQ_UNBOUND; } =20 /* Must be called with hvm_domain->irq_lock hold */ --=20 2.34.1 From nobody Sat May 18 08:14:05 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; 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mx.microsoft.com 1; spf=pass smtp.mailfrom=citrix.com; dmarc=pass action=none header.from=citrix.com; dkim=pass header.d=citrix.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=citrix.onmicrosoft.com; s=selector2-citrix-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=vrDS53nrLLQmuLsxvZpPkLlor7GHN4Niyf5R3N6D0us=; b=vAQqLyZ1ToV1Po65twx8+oUOEBeidXc9YlejWb+JzWt1vUZmgDah3Y7qfHLy76O5I/tn6u6ci/XJ3/SnHsJoo5LassHXsuNU9H3w6yKv1vNP8xZAXNrBb7C1d+8AVLbcVg3AwqRaS4WVzVk/wBK0EnO5SEm3T48Fmw5R1y9qrEw= From: Roger Pau Monne To: CC: Roger Pau Monne , Jan Beulich , Andrew Cooper , Wei Liu , Alex Olson , Andrew Cooper Subject: [PATCH 3/3] hvm/pirq: allow control domains usage of PHYSDEVOP_{un,}map_pirq Date: Thu, 3 Mar 2022 11:30:57 +0100 Message-ID: <20220303103057.49181-4-roger.pau@citrix.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220303103057.49181-1-roger.pau@citrix.com> References: <20220303103057.49181-1-roger.pau@citrix.com> Content-Type: text/plain; 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As such relax the check for HVM based guests and allow the usage of the hypercalls for any control domains. Note that further safety checks will be performed in order to assert that the current domain has the right permissions against the target of the hypercall. Reported-by: Alex Olson Reported-by: Andrew Cooper Signed-off-by: Roger Pau Monn=C3=A9 --- xen/arch/x86/hvm/hypercall.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/xen/arch/x86/hvm/hypercall.c b/xen/arch/x86/hvm/hypercall.c index 030243810e..9128e4d025 100644 --- a/xen/arch/x86/hvm/hypercall.c +++ b/xen/arch/x86/hvm/hypercall.c @@ -87,6 +87,13 @@ static long hvm_physdev_op(int cmd, XEN_GUEST_HANDLE_PAR= AM(void) arg) { case PHYSDEVOP_map_pirq: case PHYSDEVOP_unmap_pirq: + /* + * Control domain (and domains controlling others) need to use + * PHYSDEVOP_{un,}map_pirq in order to setup interrupts for passth= rough + * devices on behalf of other guests. + */ + if ( is_control_domain(currd) || currd->target ) + break; case PHYSDEVOP_eoi: case PHYSDEVOP_irq_status_query: case PHYSDEVOP_get_free_pirq: --=20 2.34.1