From nobody Tue May 13 11:38:38 2025 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1675268760514970.1885632864942; Wed, 1 Feb 2023 08:26:00 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pNEAV-0001is-6y; Wed, 01 Feb 2023 09:32:59 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pNE9n-0001Sb-0k for qemu-devel@nongnu.org; Wed, 01 Feb 2023 09:32:22 -0500 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pNE9g-00037b-SO for qemu-devel@nongnu.org; Wed, 01 Feb 2023 09:32:14 -0500 Received: from i7.infradead.org ([2001:8b0:10b:1:21e:67ff:fecb:7a92]) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pNE8q-004nyJ-3A; Wed, 01 Feb 2023 14:31:17 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.96 #2 (Red Hat Linux)) id 1pNE9P-007Jr6-1o; Wed, 01 Feb 2023 14:31:51 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description; bh=o/umsImmdq8UVhkJiPVFPmIRgKlI9E0mo6P/86IZCis=; b=lrUxWI+F0ujGqEv5wCOn2AKQYf BVA9MI6JdFtcZzNYyjBNGpseT2UM7KeSeUrjGz+nZTCKaKIHvF7cb0j8W5VDS/OzksbO0qgTnk3O7 Wk2LrOvGM8l/JZQFh+ap25KRLfaSqSVWw2s7WO8DLvtKejHW9RY454uT20qT25MQDOqiOP3rbt6nU a7Ot2aKIqgZPYDIvLrNAVxr0iufeb+lK1jOASUPqPKZmSCc2YxbdGzykhqLLM8dFqZhbtRsYTUcEs vWDiUq05IXWONW6vXEBO6Quuw1a48JeG0u6MV9U2b+bYb2xyfqb4iyv6s7tc5rKQjRbayigBum6zT t5bIQ6nA==; From: David Woodhouse To: Peter Maydell , qemu-devel@nongnu.org Cc: Paolo Bonzini , Paul Durrant , Joao Martins , Ankur Arora , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Thomas Huth , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Juan Quintela , "Dr . David Alan Gilbert" , Claudio Fontana , Julien Grall , "Michael S. Tsirkin" , Marcel Apfelbaum , armbru@redhat.com Subject: [PATCH v10 18/59] i386/xen: implement XENMEM_add_to_physmap_batch Date: Wed, 1 Feb 2023 14:31:07 +0000 Message-Id: <20230201143148.1744093-19-dwmw2@infradead.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230201143148.1744093-1-dwmw2@infradead.org> References: <20230201143148.1744093-1-dwmw2@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-SRS-Rewrite: SMTP reverse-path rewritten from by desiato.infradead.org. See http://www.infradead.org/rpr.html Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: none client-ip=2001:8b0:10b:1:d65d:64ff:fe57:4e05; envelope-from=BATV+c61c7683afee22e62f8e+7101+infradead.org+dwmw2@desiato.srs.infradead.org; helo=desiato.infradead.org X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1675268762634100003 Content-Type: text/plain; charset="utf-8" From: David Woodhouse Signed-off-by: David Woodhouse Reviewed-by: Paul Durrant --- target/i386/kvm/xen-compat.h | 24 +++++++++++++ target/i386/kvm/xen-emu.c | 69 ++++++++++++++++++++++++++++++++++++ 2 files changed, 93 insertions(+) diff --git a/target/i386/kvm/xen-compat.h b/target/i386/kvm/xen-compat.h index 2d852e2a28..448336de92 100644 --- a/target/i386/kvm/xen-compat.h +++ b/target/i386/kvm/xen-compat.h @@ -15,6 +15,20 @@ =20 typedef uint32_t compat_pfn_t; typedef uint32_t compat_ulong_t; +typedef uint32_t compat_ptr_t; + +#define __DEFINE_COMPAT_HANDLE(name, type) \ + typedef struct { \ + compat_ptr_t c; \ + type *_[0] __attribute__((packed)); \ + } __compat_handle_ ## name; \ + +#define DEFINE_COMPAT_HANDLE(name) __DEFINE_COMPAT_HANDLE(name, name) +#define COMPAT_HANDLE(name) __compat_handle_ ## name + +DEFINE_COMPAT_HANDLE(compat_pfn_t); +DEFINE_COMPAT_HANDLE(compat_ulong_t); +DEFINE_COMPAT_HANDLE(int); =20 struct compat_xen_add_to_physmap { domid_t domid; @@ -24,4 +38,14 @@ struct compat_xen_add_to_physmap { compat_pfn_t gpfn; }; =20 +struct compat_xen_add_to_physmap_batch { + domid_t domid; + uint16_t space; + uint16_t size; + uint16_t extra; + COMPAT_HANDLE(compat_ulong_t) idxs; + COMPAT_HANDLE(compat_pfn_t) gpfns; + COMPAT_HANDLE(int) errs; +}; + #endif /* QEMU_I386_XEN_COMPAT_H */ diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c index 5d79827128..2b235e7b27 100644 --- a/target/i386/kvm/xen-emu.c +++ b/target/i386/kvm/xen-emu.c @@ -262,6 +262,71 @@ static int do_add_to_physmap(struct kvm_xen_exit *exit= , X86CPU *cpu, return add_to_physmap_one(xatp.space, xatp.idx, xatp.gpfn); } =20 +static int do_add_to_physmap_batch(struct kvm_xen_exit *exit, X86CPU *cpu, + uint64_t arg) +{ + struct xen_add_to_physmap_batch xatpb; + unsigned long idxs_gva, gpfns_gva, errs_gva; + CPUState *cs =3D CPU(cpu); + size_t op_sz; + + if (hypercall_compat32(exit->u.hcall.longmode)) { + struct compat_xen_add_to_physmap_batch xatpb32; + + qemu_build_assert(sizeof(struct compat_xen_add_to_physmap_batch) = =3D=3D 20); + if (kvm_copy_from_gva(cs, arg, &xatpb32, sizeof(xatpb32))) { + return -EFAULT; + } + xatpb.domid =3D xatpb32.domid; + xatpb.space =3D xatpb32.space; + xatpb.size =3D xatpb32.size; + + idxs_gva =3D xatpb32.idxs.c; + gpfns_gva =3D xatpb32.gpfns.c; + errs_gva =3D xatpb32.errs.c; + op_sz =3D sizeof(uint32_t); + } else { + if (kvm_copy_from_gva(cs, arg, &xatpb, sizeof(xatpb))) { + return -EFAULT; + } + op_sz =3D sizeof(unsigned long); + idxs_gva =3D (unsigned long)xatpb.idxs.p; + gpfns_gva =3D (unsigned long)xatpb.gpfns.p; + errs_gva =3D (unsigned long)xatpb.errs.p; + } + + if (xatpb.domid !=3D DOMID_SELF && xatpb.domid !=3D xen_domid) { + return -ESRCH; + } + + /* Explicitly invalid for the batch op. Not that we implement it anywa= y. */ + if (xatpb.space =3D=3D XENMAPSPACE_gmfn_range) { + return -EINVAL; + } + + while (xatpb.size--) { + unsigned long idx =3D 0; + unsigned long gpfn =3D 0; + int err; + + /* For 32-bit compat this only copies the low 32 bits of each */ + if (kvm_copy_from_gva(cs, idxs_gva, &idx, op_sz) || + kvm_copy_from_gva(cs, gpfns_gva, &gpfn, op_sz)) { + return -EFAULT; + } + idxs_gva +=3D op_sz; + gpfns_gva +=3D op_sz; + + err =3D add_to_physmap_one(xatpb.space, idx, gpfn); + + if (kvm_copy_to_gva(cs, errs_gva, &err, sizeof(err))) { + return -EFAULT; + } + errs_gva +=3D sizeof(err); + } + return 0; +} + static bool kvm_xen_hcall_memory_op(struct kvm_xen_exit *exit, X86CPU *cpu, int cmd, uint64_t arg) { @@ -272,6 +337,10 @@ static bool kvm_xen_hcall_memory_op(struct kvm_xen_exi= t *exit, X86CPU *cpu, err =3D do_add_to_physmap(exit, cpu, arg); break; =20 + case XENMEM_add_to_physmap_batch: + err =3D do_add_to_physmap_batch(exit, cpu, arg); + break; + default: return false; } --=20 2.39.0