From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id D19571BDD3 for ; Tue, 28 May 2024 06:55:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716879327; cv=none; b=MqinKHeu/I2VkvBM7jHucAuHYsSdUEejxaQCezdJocTASC91DyZ+18OFFqAISbzu53I701QDw37YKW4YZ/MGxYC0uBiqMD188L8pvj8m/DS/aXTNIg1yvlOYCbYS/L0WOJTzO6xCH2HaAI4D3AEkSMeGVlKDXHhKx/g2l4nZ/RM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716879327; c=relaxed/simple; bh=BF2nYbG8XK7M/dOe/WkvEWY8Wc4GRw1KBhYDuTM/0Ns=; h=Message-ID:Date:MIME-Version:From:Subject:To:Cc:References: In-Reply-To:Content-Type; b=h5BlxuV1eFWTFhP5C1r3zUCZJs7TaqJ8Bo8mbj+yqk1KxGrzi9c1kJJ7UnGqN1yT3HDxTq1g8YRHDZQtL2Lpran75rroMwqY8e5XrTrEvApewDDg+gidmDXQHYEwqrMb+ipcYq4yhJCbm3zrE72LVb6M9xG0oMIGuEhQp9Gn3RU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 88109339; Mon, 27 May 2024 23:55:43 -0700 (PDT) Received: from [10.162.40.16] (a077841.arm.com [10.162.40.16]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 77D173F792; Mon, 27 May 2024 23:55:11 -0700 (PDT) Message-ID: <4f7d8691-fe19-4e8a-95e5-9f7680c82021@arm.com> Date: Tue, 28 May 2024 12:24:57 +0530 Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Amit Daniel Kachhap Subject: Re: [PATCH v4 13/29] arm64: convert protection key into vm_flags and pgprot values To: Joey Gouly , linux-arm-kernel@lists.infradead.org Cc: akpm@linux-foundation.org, aneesh.kumar@kernel.org, aneesh.kumar@linux.ibm.com, bp@alien8.de, broonie@kernel.org, catalin.marinas@arm.com, christophe.leroy@csgroup.eu, dave.hansen@linux.intel.com, hpa@zytor.com, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, maz@kernel.org, mingo@redhat.com, mpe@ellerman.id.au, naveen.n.rao@linux.ibm.com, npiggin@gmail.com, oliver.upton@linux.dev, shuah@kernel.org, szabolcs.nagy@arm.com, tglx@linutronix.de, will@kernel.org, x86@kernel.org, kvmarm@lists.linux.dev References: <20240503130147.1154804-1-joey.gouly@arm.com> <20240503130147.1154804-14-joey.gouly@arm.com> Content-Language: en-US In-Reply-To: <20240503130147.1154804-14-joey.gouly@arm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 5/3/24 18:31, Joey Gouly wrote: > Modify arch_calc_vm_prot_bits() and vm_get_page_prot() such that the pkey > value is set in the vm_flags and then into the pgprot value. > > Signed-off-by: Joey Gouly > Cc: Catalin Marinas > Cc: Will Deacon > --- > arch/arm64/include/asm/mman.h | 8 +++++++- > arch/arm64/mm/mmap.c | 9 +++++++++ > 2 files changed, 16 insertions(+), 1 deletion(-) > > diff --git a/arch/arm64/include/asm/mman.h b/arch/arm64/include/asm/mman.h > index 5966ee4a6154..ecb2d18dc4d7 100644 > --- a/arch/arm64/include/asm/mman.h > +++ b/arch/arm64/include/asm/mman.h > @@ -7,7 +7,7 @@ > #include > > static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot, > - unsigned long pkey __always_unused) > + unsigned long pkey) > { > unsigned long ret = 0; > > @@ -17,6 +17,12 @@ static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot, > if (system_supports_mte() && (prot & PROT_MTE)) > ret |= VM_MTE; > > +#if defined(CONFIG_ARCH_HAS_PKEYS) Should there be system_supports_poe() check like above? Thanks, Amit > + ret |= pkey & 0x1 ? VM_PKEY_BIT0 : 0; > + ret |= pkey & 0x2 ? VM_PKEY_BIT1 : 0; > + ret |= pkey & 0x4 ? VM_PKEY_BIT2 : 0; > +#endif > + > return ret; > } > #define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey) > diff --git a/arch/arm64/mm/mmap.c b/arch/arm64/mm/mmap.c > index 642bdf908b22..86eda6bc7893 100644 > --- a/arch/arm64/mm/mmap.c > +++ b/arch/arm64/mm/mmap.c > @@ -102,6 +102,15 @@ pgprot_t vm_get_page_prot(unsigned long vm_flags) > if (vm_flags & VM_MTE) > prot |= PTE_ATTRINDX(MT_NORMAL_TAGGED); > > +#ifdef CONFIG_ARCH_HAS_PKEYS > + if (vm_flags & VM_PKEY_BIT0) > + prot |= PTE_PO_IDX_0; > + if (vm_flags & VM_PKEY_BIT1) > + prot |= PTE_PO_IDX_1; > + if (vm_flags & VM_PKEY_BIT2) > + prot |= PTE_PO_IDX_2; > +#endif > + > return __pgprot(prot); > } > EXPORT_SYMBOL(vm_get_page_prot);