From nobody Mon Feb 9 05:38:38 2026 Received: from mail-pl1-f174.google.com (mail-pl1-f174.google.com [209.85.214.174]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A22C7146583 for ; Fri, 19 Jul 2024 16:09:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.174 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721405388; cv=none; b=c+DdnQ5U5VRcGd6812DJg2Hlr7e85C0N4ojs1LDkI8Ud/37bKpRL4wHV7Kn+A1SJqIg/6wT2c4yu10XbjsF+gqNWDC5CsEWE2F6Rzorvq5OwDasW/4fVgN/GyQk7leBNYXH5+DXybl7lGTYD4i1KyUABPnQOnelXZBvcqRAA9lk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721405388; c=relaxed/simple; bh=CayvJpwqAvJdfQdSd2Y5GdFSxQA0Pu7twwYIv0jlrp0=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=fVCtxVTqsJYjdWPOmrdWLZM2a0T0S8Xnyngxxp/ccnM9rfRj/r7E88+jFNQ4bJ9fuLbbLwooHvsOrruAf1T4S7Ep1RG7pYGD3BTl6xp0ELX2Xz0EH0bPDvA3qt0QjADxxY9p5v923r/FH4P91r9N4ER7bNfsSgyZFQ8zShL2TBU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ventanamicro.com; spf=pass smtp.mailfrom=ventanamicro.com; dkim=pass (2048-bit key) header.d=ventanamicro.com header.i=@ventanamicro.com header.b=PBL5/cXy; arc=none smtp.client-ip=209.85.214.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ventanamicro.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ventanamicro.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ventanamicro.com header.i=@ventanamicro.com header.b="PBL5/cXy" Received: by mail-pl1-f174.google.com with SMTP id d9443c01a7336-1fc587361b6so20373525ad.2 for ; Fri, 19 Jul 2024 09:09:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; t=1721405386; x=1722010186; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=fvm3hpKvRW81Dir7XpGK5V4AZ1ZJAiyVeCH2mMtrPq8=; b=PBL5/cXyoJdgHAe1hd1FdcVUlVH7rxUpcu2w3RoG00+yF08qmh+ijS57I48AgHAvJ/ 5ROcpbyXyZeBLByCvMyzQDv3rF0xcDryRvgX2bgE+160GRKUJlUwnFmE2/50+GMDVcOb OI94QjJirW84Hv1ppslMcoHUp9NHF5J77DT2OfYaC+3bwVUeWpXkR89s0AY6OgxIQCo3 Zv01ur/1PqkQsH+MCfBnOzubLlQTkyXzDBZtzOGRgKjXGGnBZkdsw0CnMHwKnuqDpPv1 35woNReeoSZLGPPZyqEwRiOzRc0ycrfYDq9t3+nXLjLG8yUEWNsxV5uXpZ982Vi86x4r n03g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1721405386; x=1722010186; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=fvm3hpKvRW81Dir7XpGK5V4AZ1ZJAiyVeCH2mMtrPq8=; b=PYR3jJ+0sUmMqWWCj9SCBj62X4+DwgbKdjKZgqk8Ng2Qcqi6lK4Z1QCvSJJx868BKb 2+p/3dCEkMt7BnuZ6nBxT/RlpGS7v7zZR5XpGEYcNtecld8Bcn6cccnXVbtkQ6pWh20l nlriKgFXg7vs+xZt/55MC6GJZbSwwhR9u477zUeC5rKqm4x/3xu/14jkSKX5C7Zcx2Mr k5bQ9oCDqfcqp39vsYQpstmTiihLHFGaBWHpb4Mmoy+7A/qsgQ/ThhtYwG5Nt/V1ia7o spka19yYBNKtDU7QpaClEW1YFCJqILFts8xX0Od2GfIgsOihZDIGFKnZZuVbtenN3TMV SkiA== X-Forwarded-Encrypted: i=1; AJvYcCX/r0AstOrkG06wBo8T/x+ZVQVHS3PhmGeLwz+u91ebMRZMlHmk/u8F44gLAQqRnFRLZmWj3bGx48bYwS1yuYZdlzfzqIKQ6sRC1xtn X-Gm-Message-State: AOJu0YyHs92/T9A+g7B8vYUbcKOce8iK2Tj+XdVuv4illUteWx2CpXbc kWXRKbKNenmc6F1zJ3xcSEtvYMwGw0V88l65BhShsG7jBvESR9nbiVujS6NDWaM= X-Google-Smtp-Source: AGHT+IHTBp6zlsH1hrlMfviNDvDhBwVMm6bPyuRntoKMRuaLAxmrocV1MrWIWDQcyMq9zx2+n0JCxw== X-Received: by 2002:a17:902:dac8:b0:1fc:5e18:f369 with SMTP id d9443c01a7336-1fd7459dd67mr3483245ad.23.1721405385835; Fri, 19 Jul 2024 09:09:45 -0700 (PDT) Received: from anup-ubuntu-vm.localdomain ([223.185.135.236]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1fd6f28f518sm6632615ad.69.2024.07.19.09.09.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 Jul 2024 09:09:45 -0700 (PDT) From: Anup Patel To: Palmer Dabbelt , Paul Walmsley Cc: Atish Patra , Andrew Jones , Anup Patel , kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Anup Patel Subject: [PATCH 06/13] RISC-V: KVM: Don't setup SGEI for zero guest external interrupts Date: Fri, 19 Jul 2024 21:39:06 +0530 Message-Id: <20240719160913.342027-7-apatel@ventanamicro.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240719160913.342027-1-apatel@ventanamicro.com> References: <20240719160913.342027-1-apatel@ventanamicro.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" No need to setup SGEI local interrupt when there are zero guest external interrupts (i.e. zero HW IMSIC guest files). Signed-off-by: Anup Patel Reviewed-by: Atish Patra --- arch/riscv/kvm/aia.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/riscv/kvm/aia.c b/arch/riscv/kvm/aia.c index 17ae4a7c0e94..8ffae0330c89 100644 --- a/arch/riscv/kvm/aia.c +++ b/arch/riscv/kvm/aia.c @@ -499,6 +499,10 @@ static int aia_hgei_init(void) hgctrl->free_bitmap =3D 0; } =20 + /* Skip SGEI interrupt setup for zero guest external interrupts */ + if (!kvm_riscv_aia_nr_hgei) + goto skip_sgei_interrupt; + /* Find INTC irq domain */ domain =3D irq_find_matching_fwnode(riscv_get_intc_hwnode(), DOMAIN_BUS_ANY); @@ -522,11 +526,16 @@ static int aia_hgei_init(void) return rc; } =20 +skip_sgei_interrupt: return 0; } =20 static void aia_hgei_exit(void) { + /* Do nothing for zero guest external interrupts */ + if (!kvm_riscv_aia_nr_hgei) + return; + /* Free per-CPU SGEI interrupt */ free_percpu_irq(hgei_parent_irq, &aia_hgei); } --=20 2.34.1