From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DC1C0C388F9 for ; Sat, 24 Oct 2020 00:07:12 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 628E921D43 for ; Sat, 24 Oct 2020 00:07:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="gRZOhW9O" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 628E921D43 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.11357.30103 (Exim 4.92) (envelope-from ) id 1kW75G-0006hq-9J; Sat, 24 Oct 2020 00:06:58 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 11357.30103; Sat, 24 Oct 2020 00:06:58 +0000 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kW75G-0006hj-6F; Sat, 24 Oct 2020 00:06:58 +0000 Received: by outflank-mailman (input) for mailman id 11357; Sat, 24 Oct 2020 00:06:56 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kW75E-0006he-2M for xen-devel@lists.xenproject.org; Sat, 24 Oct 2020 00:06:56 +0000 Received: from mail.kernel.org (unknown [198.145.29.99]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id d36654a4-6a19-47de-bc0c-508d8f75f280; Sat, 24 Oct 2020 00:06:55 +0000 (UTC) Received: from sstabellini-ThinkPad-T480s (c-24-130-65-46.hsd1.ca.comcast.net [24.130.65.46]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A42F0214F1; Sat, 24 Oct 2020 00:06:53 +0000 (UTC) Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kW75E-0006he-2M for xen-devel@lists.xenproject.org; Sat, 24 Oct 2020 00:06:56 +0000 X-Inumbo-ID: d36654a4-6a19-47de-bc0c-508d8f75f280 Received: from mail.kernel.org (unknown [198.145.29.99]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id d36654a4-6a19-47de-bc0c-508d8f75f280; Sat, 24 Oct 2020 00:06:55 +0000 (UTC) Received: from sstabellini-ThinkPad-T480s (c-24-130-65-46.hsd1.ca.comcast.net [24.130.65.46]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A42F0214F1; Sat, 24 Oct 2020 00:06:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603498014; bh=MShSA168VqfvbW0FxSMkG4ksQrHfEZI2MwoSwHVBmYg=; h=Date:From:To:cc:Subject:In-Reply-To:References:From; b=gRZOhW9OXX3XpMgm7ZJ0CeizffkhxpTG5TJuwQ//cZvwQU8TZCcx6y7jD/jMHFzKN YTtDiLoLYCviEEn7Kk5Smr9c0gjsuNH33N63VfWmDKQI71mTePeDbPzuka/ThhzL/I FVM6wbavy2l2+MXaDELCr3eWuURD/9aTzjJ60l7w= Date: Fri, 23 Oct 2020 17:06:52 -0700 (PDT) From: Stefano Stabellini X-X-Sender: sstabellini@sstabellini-ThinkPad-T480s To: Julien Grall cc: xen-devel@lists.xenproject.org, alex.bennee@linaro.org, masami.hiramatsu@linaro.org, ehem+xen@m5p.com, bertrand.marquis@arm.com, andre.przywara@arm.com, Rahul Singh , Julien Grall , Stefano Stabellini , Volodymyr Babchuk , Andrew Cooper , George Dunlap , Ian Jackson , Jan Beulich , Wei Liu , =?UTF-8?Q?Roger_Pau_Monn=C3=A9?= , Rahul Singh Subject: Re: [PATCH v2 1/7] xen/acpi: Rework acpi_os_map_memory() and acpi_os_unmap_memory() In-Reply-To: <20201023154156.6593-2-julien@xen.org> Message-ID: References: <20201023154156.6593-1-julien@xen.org> <20201023154156.6593-2-julien@xen.org> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII On Fri, 23 Oct 2020, Julien Grall wrote: > From: Julien Grall > > The functions acpi_os_{un,}map_memory() are meant to be arch-agnostic > while the __acpi_os_{un,}map_memory() are meant to be arch-specific. > > Currently, the former are still containing x86 specific code. > > To avoid this rather strange split, the generic helpers are reworked so > they are arch-agnostic. This requires the introduction of a new helper > __acpi_os_unmap_memory() that will undo any mapping done by > __acpi_os_map_memory(). > > Currently, the arch-helper for unmap is basically a no-op so it only > returns whether the mapping was arch specific. But this will change > in the future. > > Note that the x86 version of acpi_os_map_memory() was already able to > able the 1MB region. Hence why there is no addition of new code. > > Signed-off-by: Julien Grall > Reviewed-by: Rahul Singh > Tested-by: Rahul Singh Acked-by: Stefano Stabellini > --- > Changes in v2: > - Constify ptr in __acpi_unmap_table() > - Coding style fixes > - Fix build on arm64 > - Use PAGE_OFFSET() rather than open-coding it > - Add Rahul's tested-by and reviewed-by > --- > xen/arch/arm/acpi/lib.c | 12 ++++++++++++ > xen/arch/x86/acpi/lib.c | 18 ++++++++++++++++++ > xen/drivers/acpi/osl.c | 34 ++++++++++++++++++---------------- > xen/include/xen/acpi.h | 1 + > 4 files changed, 49 insertions(+), 16 deletions(-) > > diff --git a/xen/arch/arm/acpi/lib.c b/xen/arch/arm/acpi/lib.c > index 4fc6e17322c1..fcc186b03399 100644 > --- a/xen/arch/arm/acpi/lib.c > +++ b/xen/arch/arm/acpi/lib.c > @@ -30,6 +30,10 @@ char *__acpi_map_table(paddr_t phys, unsigned long size) > unsigned long base, offset, mapped_size; > int idx; > > + /* No arch specific implementation after early boot */ > + if ( system_state >= SYS_STATE_boot ) > + return NULL; > + > offset = phys & (PAGE_SIZE - 1); > mapped_size = PAGE_SIZE - offset; > set_fixmap(FIXMAP_ACPI_BEGIN, maddr_to_mfn(phys), PAGE_HYPERVISOR); > @@ -49,6 +53,14 @@ char *__acpi_map_table(paddr_t phys, unsigned long size) > return ((char *) base + offset); > } > > +bool __acpi_unmap_table(const void *ptr, unsigned long size) > +{ > + vaddr_t vaddr = (vaddr_t)ptr; > + > + return ((vaddr >= FIXMAP_ADDR(FIXMAP_ACPI_BEGIN)) && > + (vaddr < (FIXMAP_ADDR(FIXMAP_ACPI_END) + PAGE_SIZE))); > +} > + > /* True to indicate PSCI 0.2+ is implemented */ > bool __init acpi_psci_present(void) > { > diff --git a/xen/arch/x86/acpi/lib.c b/xen/arch/x86/acpi/lib.c > index 265b9ad81905..a22414a05c13 100644 > --- a/xen/arch/x86/acpi/lib.c > +++ b/xen/arch/x86/acpi/lib.c > @@ -46,6 +46,10 @@ char *__acpi_map_table(paddr_t phys, unsigned long size) > if ((phys + size) <= (1 * 1024 * 1024)) > return __va(phys); > > + /* No further arch specific implementation after early boot */ > + if (system_state >= SYS_STATE_boot) > + return NULL; > + > offset = phys & (PAGE_SIZE - 1); > mapped_size = PAGE_SIZE - offset; > set_fixmap(FIX_ACPI_END, phys); > @@ -66,6 +70,20 @@ char *__acpi_map_table(paddr_t phys, unsigned long size) > return ((char *) base + offset); > } > > +bool __acpi_unmap_table(const void *ptr, unsigned long size) > +{ > + unsigned long vaddr = (unsigned long)ptr; > + > + if ((vaddr >= DIRECTMAP_VIRT_START) && > + (vaddr < DIRECTMAP_VIRT_END)) { > + ASSERT(!((__pa(ptr) + size - 1) >> 20)); > + return true; > + } > + > + return ((vaddr >= __fix_to_virt(FIX_ACPI_END)) && > + (vaddr < (__fix_to_virt(FIX_ACPI_BEGIN) + PAGE_SIZE))); > +} > + > unsigned int acpi_get_processor_id(unsigned int cpu) > { > unsigned int acpiid, apicid; > diff --git a/xen/drivers/acpi/osl.c b/xen/drivers/acpi/osl.c > index 4c8bb7839eda..389505f78666 100644 > --- a/xen/drivers/acpi/osl.c > +++ b/xen/drivers/acpi/osl.c > @@ -92,27 +92,29 @@ acpi_physical_address __init acpi_os_get_root_pointer(void) > void __iomem * > acpi_os_map_memory(acpi_physical_address phys, acpi_size size) > { > - if (system_state >= SYS_STATE_boot) { > - mfn_t mfn = _mfn(PFN_DOWN(phys)); > - unsigned int offs = phys & (PAGE_SIZE - 1); > - > - /* The low first Mb is always mapped on x86. */ > - if (IS_ENABLED(CONFIG_X86) && !((phys + size - 1) >> 20)) > - return __va(phys); > - return __vmap(&mfn, PFN_UP(offs + size), 1, 1, > - ACPI_MAP_MEM_ATTR, VMAP_DEFAULT) + offs; > - } > - return __acpi_map_table(phys, size); > + void *ptr; > + mfn_t mfn = _mfn(PFN_DOWN(phys)); > + unsigned int offs = PAGE_OFFSET(phys); > + > + /* Try the arch specific implementation first */ > + ptr = __acpi_map_table(phys, size); > + if (ptr) > + return ptr; > + > + /* No common implementation for early boot map */ > + if (unlikely(system_state < SYS_STATE_boot)) > + return NULL; > + > + ptr = __vmap(&mfn, PFN_UP(offs + size), 1, 1, > + ACPI_MAP_MEM_ATTR, VMAP_DEFAULT); > + > + return !ptr ? NULL : (ptr + offs); > } > > void acpi_os_unmap_memory(void __iomem * virt, acpi_size size) > { > - if (IS_ENABLED(CONFIG_X86) && > - (unsigned long)virt >= DIRECTMAP_VIRT_START && > - (unsigned long)virt < DIRECTMAP_VIRT_END) { > - ASSERT(!((__pa(virt) + size - 1) >> 20)); > + if (__acpi_unmap_table(virt, size)) > return; > - } > > if (system_state >= SYS_STATE_boot) > vunmap((void *)((unsigned long)virt & PAGE_MASK)); > diff --git a/xen/include/xen/acpi.h b/xen/include/xen/acpi.h > index c945ab05c864..21d5e9feb5ae 100644 > --- a/xen/include/xen/acpi.h > +++ b/xen/include/xen/acpi.h > @@ -68,6 +68,7 @@ typedef int (*acpi_table_entry_handler) (struct acpi_subtable_header *header, co > > unsigned int acpi_get_processor_id (unsigned int cpu); > char * __acpi_map_table (paddr_t phys_addr, unsigned long size); > +bool __acpi_unmap_table(const void *ptr, unsigned long size); > int acpi_boot_init (void); > int acpi_boot_table_init (void); > int acpi_numa_init (void); > -- > 2.17.1 >