From patchwork Tue Jul 30 08:24:36 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Liju-clr Chen X-Patchwork-Id: 13747029 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 4988EC3DA61 for ; Tue, 30 Jul 2024 08:30:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:CC:To:From:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=CcJzTAL9IFu4/nhUMP2RjTp8+dJQAQi4jXS1e0DRnFY=; b=nNFeAOT2HEuaLedmShXlyCLwcD Gu8vNLKePfFiuJWHpF8g6oZVhZQJJ7Bkh8ydfqnEOvFRpRIFJr2uOZceSafePXKDOIcjorVmQMcNF Ud8VSk4zCo4kRAqA0TCH9ESHzL0mco349iHGL9N1Vm0WZ4Sv0thYZ4mup0IAorrQsXIB4tbfEP9Ne gjLrOXSgAX3ZVbc8X9EP76KhORc8WRo2CQGEvKrssnOu7hfD/FEphpJWcIPeixp+SgIy+vstwO59Y U2AmAwdD+Pp2pM2C2lskXQZ+1ZfFeSa/gbBNRz46LetgyKOKiAYAmL51FGOFikEwmciYOnun86PC6 iWFSrp/w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sYiFV-0000000EGsQ-0Td2; Tue, 30 Jul 2024 08:30:25 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sYiA4-0000000EE6j-3yuj; Tue, 30 Jul 2024 08:24:54 +0000 X-UUID: 2bb211844e4d11ef955bff358274dad2-20240730 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=CcJzTAL9IFu4/nhUMP2RjTp8+dJQAQi4jXS1e0DRnFY=; b=qNiCW+mrbTHqMq3Ivje8mGgJ4ZQKBFLQEC2qveMZ0lC4L7aAUe/GnTBZh1UgRbJzgCt6H+9KhJQGMxHbIOg5/wmTnyD86y0MrqBZ+e6159qIp/L0LM23xbtGXYFOx2ZOTPrLhi2lKQboD4VsRrE7+EzYN41tHKSWL3mv8KNTPKk=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.41,REQID:5b28ae7f-0fa7-413a-bff2-6c21ee945b94,IP:0,U RL:0,TC:0,Content:-25,EDM:-25,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACT ION:release,TS:-50 X-CID-META: VersionHash:6dc6a47,CLOUDID:fccfedd5-0d68-4615-a20f-01d7bd41f0bb,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:1,IP:nil,UR L:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1,S PR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: 2bb211844e4d11ef955bff358274dad2-20240730 Received: from mtkmbs09n2.mediatek.inc [(172.21.101.94)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1994421735; Tue, 30 Jul 2024 01:24:42 -0700 Received: from mtkmbs13n1.mediatek.inc (172.21.101.193) by MTKMBS09N2.mediatek.inc (172.21.101.94) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Tue, 30 Jul 2024 01:24:40 -0700 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs13n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Tue, 30 Jul 2024 16:24:40 +0800 From: Liju-clr Chen To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jonathan Corbet , Catalin Marinas , Will Deacon , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Richard Cochran , Matthias Brugger , AngeloGioacchino Del Regno , Liju-clr Chen , Yingshiuan Pan , Ze-yu Wang CC: , , , , , , , Shawn Hsiao , PeiLun Suei , Chi-shen Yeh , Kevenny Hsieh Subject: [PATCH v12 24/24] virt: geniezone: Emulate IPI for guest VM Date: Tue, 30 Jul 2024 16:24:36 +0800 Message-ID: <20240730082436.9151-25-liju-clr.chen@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20240730082436.9151-1-liju-clr.chen@mediatek.com> References: <20240730082436.9151-1-liju-clr.chen@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240730_012449_658955_133FC0F0 X-CRM114-Status: GOOD ( 13.56 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Kevenny Hsieh Emulate Inter-Processor Interrupts (IPI) handling for guest VMs. Ensure that when a vCPU thread enters an idle state and relinquishes CPU control to the host, it can be woken up by IPIs issued by other vCPUs through the gzvm driver. Add a new wake-up mechanism, `GZVM_EXIT_IPI`, to handle IPIs. Ensure that idle vCPUs can be woken up not only by virtual timer (vtimer) and virtio interrupts but also by IPIs issued by other vCPUs. Ensure proper handling of IPIs, allowing idle vCPUs to be woken up and respond to interrupts, thereby maintaining correct and efficient inter-processor communication within the guest VM. Signed-off-by: Kevenny Hsieh Signed-off-by: Liju Chen --- drivers/virt/geniezone/gzvm_exception.c | 5 +++++ drivers/virt/geniezone/gzvm_vcpu.c | 3 +++ include/linux/soc/mediatek/gzvm_drv.h | 1 + include/uapi/linux/gzvm.h | 1 + 4 files changed, 10 insertions(+) diff --git a/drivers/virt/geniezone/gzvm_exception.c b/drivers/virt/geniezone/gzvm_exception.c index 391168a3f737..7a4e3d76aa7a 100644 --- a/drivers/virt/geniezone/gzvm_exception.c +++ b/drivers/virt/geniezone/gzvm_exception.c @@ -105,3 +105,8 @@ int gzvm_handle_guest_idle(struct gzvm_vcpu *vcpu) return ret; } + +void gzvm_handle_guest_ipi(struct gzvm_vcpu *vcpu) +{ + gzvm_vcpu_wakeup_all(vcpu->gzvm); +} diff --git a/drivers/virt/geniezone/gzvm_vcpu.c b/drivers/virt/geniezone/gzvm_vcpu.c index 247848ee126c..5cdd6ccbe76d 100644 --- a/drivers/virt/geniezone/gzvm_vcpu.c +++ b/drivers/virt/geniezone/gzvm_vcpu.c @@ -184,6 +184,9 @@ static long gzvm_vcpu_run(struct gzvm_vcpu *vcpu, void __user *argp) case GZVM_EXIT_IDLE: gzvm_handle_guest_idle(vcpu); break; + case GZVM_EXIT_IPI: + gzvm_handle_guest_ipi(vcpu); + break; case GZVM_EXIT_UNKNOWN: fallthrough; default: diff --git a/include/linux/soc/mediatek/gzvm_drv.h b/include/linux/soc/mediatek/gzvm_drv.h index 61f3ae4ee793..0302890ed69e 100644 --- a/include/linux/soc/mediatek/gzvm_drv.h +++ b/include/linux/soc/mediatek/gzvm_drv.h @@ -241,6 +241,7 @@ int gzvm_handle_relinquish(struct gzvm_vcpu *vcpu, phys_addr_t ipa); bool gzvm_handle_guest_hvc(struct gzvm_vcpu *vcpu); bool gzvm_arch_handle_guest_hvc(struct gzvm_vcpu *vcpu); int gzvm_handle_guest_idle(struct gzvm_vcpu *vcpu); +void gzvm_handle_guest_ipi(struct gzvm_vcpu *vcpu); void gzvm_vcpu_wakeup_all(struct gzvm *gzvm); int gzvm_arch_create_device(u16 vm_id, struct gzvm_create_device *gzvm_dev); diff --git a/include/uapi/linux/gzvm.h b/include/uapi/linux/gzvm.h index 1fe483ef2ed5..bcbc4d62a70f 100644 --- a/include/uapi/linux/gzvm.h +++ b/include/uapi/linux/gzvm.h @@ -189,6 +189,7 @@ enum { GZVM_EXIT_SHUTDOWN = 0x92920009, GZVM_EXIT_GZ = 0x9292000a, GZVM_EXIT_IDLE = 0x9292000b, + GZVM_EXIT_IPI = 0x9292000d, }; /* exception definitions of GZVM_EXIT_EXCEPTION */