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.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 CCB53CD8C92 for ; Mon, 8 Jun 2026 14:53:04 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4gYw4N3VQPz3c1C; Tue, 09 Jun 2026 00:52:20 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip="2a01:238:42d9:3f00:e505:6202:4f0c:f051" ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1780930338; cv=none; b=BoTYiodGkQxZQLJ2PEZWNpwc7TWKpozQid2bgK5oPU5JmNjwCUzBKh9ddMhoQjIhvV9VgzxiJyDZ0OL4cEUBtUZXiuZGliqr+xTD1hQwdsg5Cpn6PNB1XM/nXj3uxmIwftivkFesHOBHydjW/Z41q9164j5eEwzAoMjtj6V7rnmdF95/mJrD5zUZzsSoC0GdXWAjoEOhUsHZFu3/Bhs9jQv997dNY63mWfo0dZP5H5DZMTmtdmGTc1KPqNKGD8AdL8m0oyTkgIYvqFPpkioXdeMpimBIO98fW1ngMFpKIiUYI0KGyU33A5DmDCuijWF4X0z1hOvgy4o0+Zjl/w0J9g== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1780930338; c=relaxed/relaxed; bh=Ejpiz6Y/mWPaxJzPjqaA8eKVKvlGQFZkkgY1EdWU85o=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gvdOH9PjDornBIVJ/oZXQDE+HZpwSwQ4e+5+6Ec3/UnoEFCzWA1wY/OcK0t6D9j/f8DFrpc8yQ7udOGWZLhJPm63NEZoAuYS1NWOzjED4tFaI0+B3hWMzKgKOoPC9q4c3Mr6DB57zvXyqKrAeZGUL8doHzivwzSMuEco2jhFXJXaj0WiKY5wZTClIBnX2EjTFKnn652SRG6z/Ocyt6/49lo7PkHgjYiGD0Sp+Kc11xMWuUevXRXh0pALonw2gIHW3I3SxSOpfC3DlcpjkVLO6JYriLH/sZnjLkKX2YiWjPIiuLvrrIwGmXjXgpcfSpityBqhPFABGgmopZZWGhhvYw== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=8bytes.org; spf=pass (client-ip=2a01:238:42d9:3f00:e505:6202:4f0c:f051; helo=mail.8bytes.org; envelope-from=joro@8bytes.org; receiver=lists.ozlabs.org) smtp.mailfrom=8bytes.org Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=8bytes.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=8bytes.org (client-ip=2a01:238:42d9:3f00:e505:6202:4f0c:f051; helo=mail.8bytes.org; envelope-from=joro@8bytes.org; receiver=lists.ozlabs.org) Received: from mail.8bytes.org (mail.8bytes.org [IPv6:2a01:238:42d9:3f00:e505:6202:4f0c:f051]) by lists.ozlabs.org (Postfix) with ESMTP id 4gYw4H6Bf5z3btP for ; Tue, 09 Jun 2026 00:52:15 +1000 (AEST) Received: from io.home.8bytes.org (p4ffe1d30.dip0.t-ipconnect.de [79.254.29.48]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail.8bytes.org (Postfix) with ESMTPSA id 80CE32028C1; Mon, 8 Jun 2026 16:43:11 +0200 (CEST) From: =?UTF-8?q?J=C3=B6rg=20R=C3=B6del?= To: Paolo Bonzini , Sean Christopherson Cc: Tom Lendacky , ashish.kalra@amd.com, michael.roth@amd.com, nsaenz@amazon.com, anelkz@amazon.de, James.Bottomley@HansenPartnership.com, Melody Wang , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, x86@kernel.org, coconut-svsm@lists.linux.dev, joerg.roedel@amd.com Subject: [PATCH 30/60] kvm: Add KVM_EXIT_PLANE_EVENT Date: Mon, 8 Jun 2026 16:42:22 +0200 Message-ID: <20260608144252.351443-31-joro@8bytes.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260608144252.351443-1-joro@8bytes.org> References: <20260608144252.351443-1-joro@8bytes.org> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Paolo Bonzini Add a new exit-type to KVM for telling user-space that a plane-vcpu is missing. Create a helper which fills out the kvm_run exit structure. Signed-off-by: Paolo Bonzini Co-developed-by: Joerg Roedel Signed-off-by: Joerg Roedel --- include/linux/kvm_host.h | 2 ++ include/uapi/linux/kvm.h | 10 ++++++++++ virt/kvm/kvm_main.c | 12 ++++++++++++ 3 files changed, 24 insertions(+) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 3ecd472c7cfa..90b97137840e 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1649,6 +1649,8 @@ void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu); void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu); bool kvm_vcpu_wake_up(struct kvm_vcpu *vcpu); +int kvm_request_create_plane(struct kvm_vcpu *vcpu, unsigned plane, u64 apic_id); + #ifndef CONFIG_S390 void __kvm_vcpu_kick(struct kvm_vcpu *vcpu, bool wait); diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 24e34b8e4819..a88d987c7882 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -146,6 +146,13 @@ struct kvm_exit_snp_req_certs { __u64 ret; }; +struct kvm_plane_event_exit { +#define KVM_PLANE_EVENT_CREATE_VCPU 1 + __u32 cause; + __u32 plane; + __u64 extra[8]; +}; + #define KVM_S390_GET_SKEYS_NONE 1 #define KVM_S390_SKEYS_MAX 1048576 @@ -193,6 +200,7 @@ struct kvm_exit_snp_req_certs { #define KVM_EXIT_ARM_SEA 41 #define KVM_EXIT_ARM_LDST64B 42 #define KVM_EXIT_SNP_REQ_CERTS 43 +#define KVM_EXIT_PLANE_EVENT 44 /* For KVM_EXIT_INTERNAL_ERROR */ /* Emulate instruction failed. */ @@ -497,6 +505,8 @@ struct kvm_run { } arm_sea; /* KVM_EXIT_SNP_REQ_CERTS */ struct kvm_exit_snp_req_certs snp_req_certs; + /* KVM_EXIT_PLANE_EVENT */ + struct kvm_plane_event_exit plane_event; /* Fix the size of the union. */ char padding[256]; }; diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 03a44ff62f0f..f0f78bb74e51 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -3973,6 +3973,18 @@ bool kvm_vcpu_wake_up(struct kvm_vcpu *vcpu) } EXPORT_SYMBOL_FOR_KVM_INTERNAL(kvm_vcpu_wake_up); +int kvm_request_create_plane(struct kvm_vcpu *vcpu, unsigned plane, u64 apic_id) +{ + vcpu->run->exit_reason = KVM_EXIT_PLANE_EVENT; + memset(&vcpu->run->plane_event, 0, sizeof(vcpu->run->plane_event)); + vcpu->run->plane_event.cause = KVM_PLANE_EVENT_CREATE_VCPU; + vcpu->run->plane_event.plane = plane; + vcpu->run->plane_event.extra[0] = apic_id; + + return 0; +} +EXPORT_SYMBOL_FOR_KVM_INTERNAL(kvm_request_create_plane); + #ifndef CONFIG_S390 /* * Kick a sleeping VCPU, or a guest VCPU in guest mode, into host kernel mode. -- 2.53.0