From patchwork Wed Mar 1 13:52:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Woodhouse X-Patchwork-Id: 1750034 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=desiato.20200630 header.b=RXfhChVr; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4PRbfb4Wbcz1yWy for ; Thu, 2 Mar 2023 01:07:51 +1100 (AEDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pXMwQ-00071t-U1; Wed, 01 Mar 2023 08:56:23 -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 1pXMt6-0000Cx-F8 for qemu-devel@nongnu.org; Wed, 01 Mar 2023 08:52:57 -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 1pXMsu-0002pH-FL for qemu-devel@nongnu.org; Wed, 01 Mar 2023 08:52:54 -0500 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=b3KrALW8kC8v7d7uKhpHfCPB//dLRrR8KQb70DV7SBM=; b=RXfhChVrEu/McZMdMGk6O8k8ws Keftbf46xU3WSxnyTl7lEW1n2Z4SBVQbOJQ4dOt4kRcVoXusniqQOHiGlNX8HqsaMoZD/07+igLfK iULF0xIDPc5oQgAdQiD9H9VPmnn3vwm4y+k/zKMOMU/aVKw+XqXdjY374BfXg4FiAQe7yJ5wIy69m N8arJJfQVEgHdJPTRh+y5zXSFISEeGdZkPm9kPBJhwPsqNpNFmBpb7Z0yc/8VqKku356AgF1xyMBP CGD/g0/upaXEmrgm9Yl4EClffRpcLXpsG/g+h6ffjTsi33NPQLIq9YPqWp4zCnAZ3gJiBfIzvKakK vUjS62yQ==; 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 1pXMse-00EuW2-05; Wed, 01 Mar 2023 13:52:32 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.96 #2 (Red Hat Linux)) id 1pXMsd-0049Wg-2w; Wed, 01 Mar 2023 13:52:27 +0000 From: David Woodhouse To: Peter Maydell , qemu-devel@nongnu.org Cc: Paolo Bonzini , Paul Durrant , Joao Martins , Ankur Arora , =?utf-8?q?Philippe_Mathieu-Daud?= =?utf-8?q?=C3=A9?= , Thomas Huth , =?utf-8?q?Alex_Benn=C3=A9e?= , Juan Quintela , "Dr . David Alan Gilbert" , Claudio Fontana , Julien Grall , "Michael S. Tsirkin" , Marcel Apfelbaum , armbru@redhat.com, Stefano Stabellini , vikram.garhwal@amd.com Subject: [PATCH v15 45/60] i386/xen: Implement HYPERVISOR_grant_table_op and GNTTABOP_[gs]et_verson Date: Wed, 1 Mar 2023 13:52:08 +0000 Message-Id: <20230301135223.988336-46-dwmw2@infradead.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230301135223.988336-1-dwmw2@infradead.org> References: <20230301135223.988336-1-dwmw2@infradead.org> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by desiato.infradead.org. See http://www.infradead.org/rpr.html Received-SPF: none client-ip=2001:8b0:10b:1:d65d:64ff:fe57:4e05; envelope-from=BATV+1cb70579e185fe7dd8a8+7129+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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: David Woodhouse Signed-off-by: David Woodhouse Reviewed-by: Paul Durrant --- hw/i386/kvm/xen_gnttab.c | 31 ++++++++++++++++++++ hw/i386/kvm/xen_gnttab.h | 5 ++++ target/i386/kvm/xen-emu.c | 60 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 96 insertions(+) diff --git a/hw/i386/kvm/xen_gnttab.c b/hw/i386/kvm/xen_gnttab.c index 72e87aea6a..b54a94e2bd 100644 --- a/hw/i386/kvm/xen_gnttab.c +++ b/hw/i386/kvm/xen_gnttab.c @@ -180,3 +180,34 @@ int xen_gnttab_map_page(uint64_t idx, uint64_t gfn) return 0; } +int xen_gnttab_set_version_op(struct gnttab_set_version *set) +{ + int ret; + + switch (set->version) { + case 1: + ret = 0; + break; + + case 2: + /* Behave as before set_version was introduced. */ + ret = -ENOSYS; + break; + + default: + ret = -EINVAL; + } + + set->version = 1; + return ret; +} + +int xen_gnttab_get_version_op(struct gnttab_get_version *get) +{ + if (get->dom != DOMID_SELF && get->dom != xen_domid) { + return -ESRCH; + } + + get->version = 1; + return 0; +} diff --git a/hw/i386/kvm/xen_gnttab.h b/hw/i386/kvm/xen_gnttab.h index a7caa94c83..79579677ba 100644 --- a/hw/i386/kvm/xen_gnttab.h +++ b/hw/i386/kvm/xen_gnttab.h @@ -15,4 +15,9 @@ void xen_gnttab_create(void); int xen_gnttab_map_page(uint64_t idx, uint64_t gfn); +struct gnttab_set_version; +struct gnttab_get_version; +int xen_gnttab_set_version_op(struct gnttab_set_version *set); +int xen_gnttab_get_version_op(struct gnttab_get_version *get); + #endif /* QEMU_XEN_GNTTAB_H */ diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c index 6f9b7a5cb9..d49b6117f1 100644 --- a/target/i386/kvm/xen-emu.c +++ b/target/i386/kvm/xen-emu.c @@ -34,6 +34,7 @@ #include "hw/xen/interface/hvm/params.h" #include "hw/xen/interface/vcpu.h" #include "hw/xen/interface/event_channel.h" +#include "hw/xen/interface/grant_table.h" #include "xen-compat.h" @@ -1169,6 +1170,61 @@ static bool kvm_xen_hcall_sched_op(struct kvm_xen_exit *exit, X86CPU *cpu, return true; } +static bool kvm_xen_hcall_gnttab_op(struct kvm_xen_exit *exit, X86CPU *cpu, + int cmd, uint64_t arg, int count) +{ + CPUState *cs = CPU(cpu); + int err; + + switch (cmd) { + case GNTTABOP_set_version: { + struct gnttab_set_version set; + + qemu_build_assert(sizeof(set) == 4); + if (kvm_copy_from_gva(cs, arg, &set, sizeof(set))) { + err = -EFAULT; + break; + } + + err = xen_gnttab_set_version_op(&set); + if (!err && kvm_copy_to_gva(cs, arg, &set, sizeof(set))) { + err = -EFAULT; + } + break; + } + case GNTTABOP_get_version: { + struct gnttab_get_version get; + + qemu_build_assert(sizeof(get) == 8); + if (kvm_copy_from_gva(cs, arg, &get, sizeof(get))) { + err = -EFAULT; + break; + } + + err = xen_gnttab_get_version_op(&get); + if (!err && kvm_copy_to_gva(cs, arg, &get, sizeof(get))) { + err = -EFAULT; + } + break; + } + case GNTTABOP_query_size: + case GNTTABOP_setup_table: + case GNTTABOP_copy: + case GNTTABOP_map_grant_ref: + case GNTTABOP_unmap_grant_ref: + case GNTTABOP_swap_grant_ref: + return false; + + default: + /* Xen explicitly returns -ENOSYS to HVM guests for all others */ + err = -ENOSYS; + break; + } + + exit->u.hcall.result = err; + return true; +} + static bool do_kvm_xen_handle_exit(X86CPU *cpu, struct kvm_xen_exit *exit) { uint16_t code = exit->u.hcall.input; @@ -1179,6 +1235,10 @@ static bool do_kvm_xen_handle_exit(X86CPU *cpu, struct kvm_xen_exit *exit) } switch (code) { + case __HYPERVISOR_grant_table_op: + return kvm_xen_hcall_gnttab_op(exit, cpu, exit->u.hcall.params[0], + exit->u.hcall.params[1], + exit->u.hcall.params[2]); case __HYPERVISOR_sched_op: return kvm_xen_hcall_sched_op(exit, cpu, exit->u.hcall.params[0], exit->u.hcall.params[1]);