From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f202.google.com (mail-pl1-f202.google.com [209.85.214.202]) (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 36240372692 for ; Wed, 8 Jul 2026 03:11:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783480306; cv=none; b=DfOUZQVu7+nD22uS+MKl4GnqEnv2nGDL7aaP8L8+NFIQD3PtxUxayuRDl/1zhvLjdOEtEm7Cbi+myw0oCcFfu/Ob7IrLScLFyIvlvL2FgYMeeZo4xLhod7oah+p58ndeJCzUCu6SdULRp3J0LezPEqI5jd9Sa7H4rEb8KGIo4dA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783480306; c=relaxed/simple; bh=tE81KleyoRV2s6xOYGKs3PPmx5AknYu1htRfv3q5dkY=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=YHoY+xCDr3o/hBoKgT46Sr6Zstfm8XDzYIJP38tpminXGLyGcC3f7PH8g4E85MjBalHR4leF41Uo0rX6l4zTTnGY0rqMYu+zekI4Z/FawhByMxekYpa00ta7XnJ4pyp4AUTmbF+JxVUfraQ2mEPTdFIvwq55ZGmKtcnX++dFld4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--jthoughton.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=kModtNB0; arc=none smtp.client-ip=209.85.214.202 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--jthoughton.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="kModtNB0" Received: by mail-pl1-f202.google.com with SMTP id d9443c01a7336-2cc6dd43737so7765535ad.2 for ; Tue, 07 Jul 2026 20:11:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1783480301; x=1784085101; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:from:to:cc:subject:date:message-id:reply-to :content-type; bh=v3/ZNamF37j63F7OBjkPRQYLwgVzCnxnT7m65A9NwFE=; b=kModtNB0+ByFkJhwTDoQMgQXVeYdorsC2CcU3lntNrgq6+2xMGm+xfjaBteQbJPWy1 pMryMrV7Af2ojpVu/d8mcZiibdgIUD+vZ5sPuf8QS7hvLITEuRga25xKctXYsATbRgY0 0a/DV9HDvPL+FhmKJcFsTDUs8wgH0NNmJ3hI22wH1tHIRgYjVOEdOZgV8vJthxYIlRI3 hMlmQ6mBPdXepi2JktYY65Y1Go+bUN1AWVSkZm9kLjUoXYV+zbdn0XZCYxGjHj5tiqnX 76QdO5aRWi+X2Gd3DBt9SJqFrHF9aV1RkmZ+RBraZ9ss6OHRdRy1OBDDA3jqZnhuPdJw S9JQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1783480301; x=1784085101; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=v3/ZNamF37j63F7OBjkPRQYLwgVzCnxnT7m65A9NwFE=; b=V5zQ79GV3Z3GUif8e4N64Oy8FLNqJD/AnmpayVYqeZbWbNlPmqAbCStgxHLGxiCZDQ unJ4lDzOvG9ueObbLeHKpl8b5MAGqr1lAcZDh2sAetb6LW/oiFhgqakOLUO9nUHUCnaP fjdXGF2VynFASjoAylmi4xjGsuv421Vf09RBvMyXro68iIbkqu7FLRP4CB4p0ASV/htH BOrdYBsMjfLwAZHCp2vvGecnF6keyG3z9n6UXIOkI2wCudloL35BKsVtOgMR0dNyJ0NE F0/8qbyKQn+XaF5AtAIjyk7luQuoi2gq3W2UR1GrEi6P2IkYvYUNHwCa1d7IFe/ntELE kksQ== X-Forwarded-Encrypted: i=1; AHgh+RovYlUmw7T28gRPXkjUSfoe+RG6ZoIvXsTfVmMBX6BZwuVgqgKWL7IbQ/HzKH7t+lPRWR3sDL/u6iv3RT4=@vger.kernel.org X-Gm-Message-State: AOJu0YxONhogCFJK7l3spAcs8GuuFtvtigWRljdCrqt6AfibHJm65SW0 KHwPdszVYvugMXAMDgV78OK205opAe4jCdfc8/mbBj3JJr9K4qnUW8gXReGd5IO17mutrBhDbAf dEt02sKpfbJoEfwyVL8/BvA== X-Received: from plai17.prod.google.com ([2002:a17:902:c951:b0:2be:fea6:e21a]) (user=jthoughton job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:384c:b0:2b7:975c:dacc with SMTP id d9443c01a7336-2ccea35af6bmr7910705ad.1.1783480301298; Tue, 07 Jul 2026 20:11:41 -0700 (PDT) Date: Wed, 8 Jul 2026 03:11:19 +0000 In-Reply-To: <20260708031129.3503195-1-jthoughton@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260708031129.3503195-1-jthoughton@google.com> X-Mailer: git-send-email 2.55.0.795.g602f6c329a-goog Message-ID: <20260708031129.3503195-10-jthoughton@google.com> Subject: [PATCH 09/18] arm64: Prevent HVO if the HVO system feature is not enabled From: James Houghton To: Will Deacon , Catalin Marinas , Muchun Song , Oscar Salvador Cc: Nikos Nikoleris , Linu Cherian , Mark Rutland , David Hildenbrand , Andrew Morton , Ryan Roberts , Nanyong Sun , Yu Zhao , Frank van der Linden , David Rientjes , James Houghton , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org Content-Type: text/plain; charset="UTF-8" The HVO system feature checks that all CPUs support HW AF and BBML2_NOABORT, both of which are needed for HVO (as of this patch). Signed-off-by: James Houghton --- arch/arm64/include/asm/hugetlb.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm64/include/asm/hugetlb.h b/arch/arm64/include/asm/hugetlb.h index d038ff14d16c..73af7911fd83 100644 --- a/arch/arm64/include/asm/hugetlb.h +++ b/arch/arm64/include/asm/hugetlb.h @@ -11,6 +11,7 @@ #define __ASM_HUGETLB_H #include +#include #include #include @@ -65,6 +66,12 @@ extern void huge_ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep, pte_t old_pte, pte_t new_pte); +#define __HAVE_ARCH_HVO_SUPPORTED +static inline bool arch_hugetlb_vmemmap_optimization_supported(void) +{ + return system_supports_hvo(); +} + #include static inline void __flush_hugetlb_tlb_range(struct vm_area_struct *vma, -- 2.55.0.795.g602f6c329a-goog