From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (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 3CEA4379990 for ; Thu, 25 Jun 2026 22:05:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782425114; cv=none; b=oJRm4jdH4rMg2Fw8deA4eYySc7fCPQfYhewzq8wV/nUVNWMF32pSpB6mymsHjZOAsIfop3cTvVbmBTUwkqRBnmn/HtZc1jzkLTEXkSbI8WdbVt2xiNkFm4LwFXv89f3l2zRa4mSCrnJMKURacOSvtShkJKjc/+6ysLI8eBUgACs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782425114; c=relaxed/simple; bh=gGrl1QnRrIHgKxMqkj52qix+onSiD5qn5e5RZzDKZ7M=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=qwdqZCbc9elETP2aanyxfNMrqTpFi30nL9oBmET6vx2MHDZ6tXIKXG4Jg7h1PuJgpxns5Fx0Et0gaORBCpekn+zl0HDM8YX1UR4F2XcYO/QdWEorktsxkt+tN10HmhfGuut1HweMx2Arv2wd3ma51IzC34mvls3l0MgBmopEoGw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=qRXK+HuT; arc=none smtp.client-ip=209.85.216.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="qRXK+HuT" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-37dfe4f6924so203471a91.1 for ; Thu, 25 Jun 2026 15:05:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1782425100; x=1783029900; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=u6No93sMWAWPDG2KkgdSV9mtTDMO1MEgDwmas8ljtKU=; b=qRXK+HuTeXfn9efmQPd9OIOl+PhQzlSMm/xaU7yu9zub2dQIoudQnk/IbpPoCLuZL7 VlpD20LMAQp6HLOlFBG/Kcp8KuPTeeX68bXTHFj59wlnUSE31FkVzkr5IRDW7Lb+EkrM bYtQSoYuTuKfhNvv7i8NBAg4hlLkcbregHwV18nelLnMlwQ/1elSHEcTG7hzsAorEZf6 lmBhjD2ThcjXTScO2HrKgGi5SQ39XMBk6l48x0nCj5MVw2qEPEUamNQ0gSQr+960Jima n/VNgmoO/CnxieTqOc2EW3PExsWQamwfB+w4joAdy27PS4FvBWa+oeByfTzmDd4N9MLQ xWdA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1782425100; x=1783029900; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=u6No93sMWAWPDG2KkgdSV9mtTDMO1MEgDwmas8ljtKU=; b=BdwE0t7lVeGMkwrceeHvb83n5yZ5tWyxJPb7jLBe2f9AEhBphCUAbjDhbnxAhVfL6H DIAZw2x35Ou+JENWZhBoRA9clWoUdi45UJAS5tSCN3jMR0tndWxk84uSN+UHmz0qdk4F xJHPkD7MFrfckEkm/w+nkaXq+WatXQavwaGHnbnk8aA+HAYiAUm/Y+K4dqfJF71mxxaM 0Pnb7t+Z0pkiJ8X4sTUjuAdsDgNllPka+ZNayKlO+UdjxGM4LeTT/edInGQwdlXOSf2J GxmtzGH0gwbByyxkvpZiX82rlGpMQv7Tcb3v0rZZUBpVURMb8VehUKe+FkLZVCyDHuWb yKxw== X-Forwarded-Encrypted: i=1; AHgh+RrJxp5sZtkvYrxA33Q7Xyzcs9jS04X06rwvrd+ptKVZWWZ7KopFQ63UZ05nQ2Z8UrFDaBQHPe77GCb3jYU=@vger.kernel.org X-Gm-Message-State: AOJu0Yx7xUQMPT7GFVVcJRN2onOZFU2RzjDguIez9oycR8Zc2IZP4hbr 8YsWcE0cRLQRybCjZVAbK6lEsoP+CgbIx2n/eKmPFt07zsWR20LjT1Pa/LN88ZQOJuxIXGrMqIi sNqHLzQ== X-Received: from pjbgb9.prod.google.com ([2002:a17:90b:609:b0:36b:8d3f:d147]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:4a8e:b0:37d:f887:dc9f with SMTP id 98e67ed59e1d1-37dfa2860demr4563491a91.21.1782425100089; Thu, 25 Jun 2026 15:05:00 -0700 (PDT) Reply-To: Sean Christopherson Date: Thu, 25 Jun 2026 15:04:47 -0700 In-Reply-To: <20260625220450.3354415-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260625220450.3354415-1-seanjc@google.com> X-Mailer: git-send-email 2.55.0.rc0.799.gd6f94ed593-goog Message-ID: <20260625220450.3354415-7-seanjc@google.com> Subject: [PATCH 6/9] KVM: x86: Add static asserts to document connection b/w TSS structs and macros From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini , Vitaly Kuznetsov Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Binbin Wu , Kai Huang Content-Type: text/plain; charset="UTF-8" Add static asserts to sanity check the I/O permission map and TSS size macros against tss_segment_32. Alternatively, the macros could simply use offsetof() and sizeof(), but having literal numbers makes it easier to understand the bigger picture, and provides a good excuse for the sanity checks. Opportunistically add the necessary includes to make tss.h self sufficient. No functional change intended. Signed-off-by: Sean Christopherson --- arch/x86/kvm/tss.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/x86/kvm/tss.h b/arch/x86/kvm/tss.h index 117bf8bec07d..55ced8975840 100644 --- a/arch/x86/kvm/tss.h +++ b/arch/x86/kvm/tss.h @@ -2,6 +2,10 @@ #ifndef __TSS_SEGMENT_H #define __TSS_SEGMENT_H +#include +#include +#include + struct tss_segment_32 { u32 prev_task_link; u32 esp0; @@ -64,4 +68,7 @@ struct tss_segment_16 { #define RMODE_TSS_SIZE \ (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1) +static_assert(offsetof(struct tss_segment_32, io_map) == TSS_IOPB_BASE_OFFSET); +static_assert(sizeof(struct tss_segment_32) == TSS_BASE_SIZE); + #endif -- 2.55.0.rc0.799.gd6f94ed593-goog