From patchwork Sat Oct 9 02:12:16 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 12546913 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E1737C433EF for ; Sat, 9 Oct 2021 02:14:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CB9CA60F5E for ; Sat, 9 Oct 2021 02:14:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244513AbhJICQn (ORCPT ); Fri, 8 Oct 2021 22:16:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38330 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244455AbhJICQS (ORCPT ); Fri, 8 Oct 2021 22:16:18 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6FADDC0613E5 for ; Fri, 8 Oct 2021 19:13:39 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id 124-20020a251182000000b005a027223ed9so14953279ybr.13 for ; Fri, 08 Oct 2021 19:13:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=reply-to:date:in-reply-to:message-id:mime-version:references :subject:from:to:cc; bh=U1tiLVYe+uI6GynZ+KQaLRA7FrCZBu6OMUfWvRALpKY=; b=a0dUiDnuPYQQeQR8jjKdumWe754GISZ9QQg3r88Y9DPMivvvQMFzh5ozOn9lgZsXNq EANJ0517a1qk3IJoQbDKT/HbLrXOUwIqcNyu7+dfgeXxAYoz4kpH6adSQnkUxJfAgZaH UPUzp5K5Wp61nwf9+BQC7R2+G4acKBHUtHtY2hEJqpIlphtwlmsMneENvaDHUPfYIfWA ce641KOEb7G5/eE8IiwGpPr2d3hjmLvvlL+U/IoLXhsAHo2ay+SC7X4AbXIrGRjqgSKf IvYRZoNRXUDoSssc3WxQQYPxSY6c1N4ujAzz18+PUihtVJsRky6YFUvr+8O4bpS4z7of nYOw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:reply-to:date:in-reply-to:message-id :mime-version:references:subject:from:to:cc; bh=U1tiLVYe+uI6GynZ+KQaLRA7FrCZBu6OMUfWvRALpKY=; b=e6DvKCK48sAZohaIV7+rXr1c7izfpP9bL8BEILw2W2VJNsd7OSxiMVrLLbc8Kt8ILk u0flP/iF1AKrKP+M1mxKWroJ4dGxuDKZhQNYzqxhw66DITgNXTts6yz9xlAj39ARWwMb fljDNbZvHVrYjdjFZ5cdNZATerrnqR8ZErZnuiTmIaMHaGy8VpDJffwfjFw8WiwhIFuO sh4qojTjR6SxTjuT41509OzQJ+e056GVhkQL1xJyJaS052k3ijEbGx7C0PzfhVfuGVjT ReyS8V6bHrxmUIvLoitXr7ABAdw6C8N0lIOrbL/oiQkICqlpCTAZRoPs+oCAriUQwA/p ce+Q== X-Gm-Message-State: AOAM530fTD6Mo+EB82aQbx0QePMJoVqBl410dqR0RvD9wk3pWUETgK2i /Prgx6IAlI9vuxGbylruKx2kesQtTUg= X-Google-Smtp-Source: ABdhPJxgCS3VlMfHSnl5qi0AADkiPF1Y5hzLatGiCcOeklrDazrBVCyGloG341BJ/seTJPIOJhGhWWtHs4E= X-Received: from seanjc798194.pdx.corp.google.com ([2620:15c:90:200:e39b:6333:b001:cb]) (user=seanjc job=sendgmr) by 2002:a5b:145:: with SMTP id c5mr7344586ybp.60.1633745618610; Fri, 08 Oct 2021 19:13:38 -0700 (PDT) Reply-To: Sean Christopherson Date: Fri, 8 Oct 2021 19:12:16 -0700 In-Reply-To: <20211009021236.4122790-1-seanjc@google.com> Message-Id: <20211009021236.4122790-24-seanjc@google.com> Mime-Version: 1.0 References: <20211009021236.4122790-1-seanjc@google.com> X-Mailer: git-send-email 2.33.0.882.g93a45727a2-goog Subject: [PATCH v2 23/43] KVM: VMX: Use boolean returns for Posted Interrupt "test" helpers From: Sean Christopherson To: Marc Zyngier , Huacai Chen , Aleksandar Markovic , Paul Mackerras , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Paolo Bonzini Cc: James Morse , Alexandru Elisei , Suzuki K Poulose , Atish Patra , David Hildenbrand , Cornelia Huck , Claudio Imbrenda , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, David Matlack , Oliver Upton , Jing Zhang Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org Return bools instead of ints for the posted interrupt "test" helpers. The bit position of the flag being test does not matter to the callers, and is in fact lost by virtue of test_bit() itself returning a bool. Returning ints is potentially dangerous, e.g. "pi_test_on(pi_desc) == 1" is safe-ish because ON is bit 0 and thus any sane implementation of pi_test_on() will work, but for SN (bit 1), checking "== 1" would rely on pi_test_on() to return 0 or 1, a.k.a. bools, as opposed to 0 or 2 (the positive bit position). Signed-off-by: Sean Christopherson Reviewed-by: Maxim Levitsky --- arch/x86/kvm/vmx/posted_intr.c | 4 ++-- arch/x86/kvm/vmx/posted_intr.h | 6 +++--- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/arch/x86/kvm/vmx/posted_intr.c b/arch/x86/kvm/vmx/posted_intr.c index 6c2110d91b06..1688f8dc535a 100644 --- a/arch/x86/kvm/vmx/posted_intr.c +++ b/arch/x86/kvm/vmx/posted_intr.c @@ -185,7 +185,7 @@ int pi_pre_block(struct kvm_vcpu *vcpu) new.control) != old.control); /* We should not block the vCPU if an interrupt is posted for it. */ - if (pi_test_on(pi_desc) == 1) + if (pi_test_on(pi_desc)) __pi_post_block(vcpu); local_irq_enable(); @@ -216,7 +216,7 @@ void pi_wakeup_handler(void) blocked_vcpu_list) { struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu); - if (pi_test_on(pi_desc) == 1) + if (pi_test_on(pi_desc)) kvm_vcpu_kick(vcpu); } spin_unlock(&per_cpu(blocked_vcpu_on_cpu_lock, cpu)); diff --git a/arch/x86/kvm/vmx/posted_intr.h b/arch/x86/kvm/vmx/posted_intr.h index 7f7b2326caf5..36ae035f14aa 100644 --- a/arch/x86/kvm/vmx/posted_intr.h +++ b/arch/x86/kvm/vmx/posted_intr.h @@ -40,7 +40,7 @@ static inline bool pi_test_and_clear_on(struct pi_desc *pi_desc) (unsigned long *)&pi_desc->control); } -static inline int pi_test_and_set_pir(int vector, struct pi_desc *pi_desc) +static inline bool pi_test_and_set_pir(int vector, struct pi_desc *pi_desc) { return test_and_set_bit(vector, (unsigned long *)pi_desc->pir); } @@ -74,13 +74,13 @@ static inline void pi_clear_sn(struct pi_desc *pi_desc) (unsigned long *)&pi_desc->control); } -static inline int pi_test_on(struct pi_desc *pi_desc) +static inline bool pi_test_on(struct pi_desc *pi_desc) { return test_bit(POSTED_INTR_ON, (unsigned long *)&pi_desc->control); } -static inline int pi_test_sn(struct pi_desc *pi_desc) +static inline bool pi_test_sn(struct pi_desc *pi_desc) { return test_bit(POSTED_INTR_SN, (unsigned long *)&pi_desc->control);