From: Christoph Hellwig <hch@lst.de>
To: "Petr Tesařík" <petr@tesarici.cz>
Cc: Robin Murphy <robin.murphy@arm.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Petr Tesarik <petrtesarik@huaweicloud.com>,
Stefano Stabellini <sstabellini@kernel.org>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
<x86@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Juergen Gross <jgross@suse.com>,
Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>,
Christoph Hellwig <hch@lst.de>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Hans de Goede <hdegoede@redhat.com>,
Jason Gunthorpe <jgg@ziepe.ca>, Kees Cook <keescook@chromium.org>,
Saravana Kannan <saravanak@google.com>,
"moderated list:XEN HYPERVISOR ARM"
<xen-devel@lists.xenproject.org>,
"moderated list:ARM PORT" <linux-arm-kernel@lists.infradead.org>,
open list <linux-kernel@vger.kernel.org>,
"open list:MIPS" <linux-mips@vger.kernel.org>,
"open list:XEN SWIOTLB SUBSYSTEM" <iommu@lists.linux.dev>,
Roberto Sassu <roberto.sassu@huaweicloud.com>,
Kefeng Wang <wangkefeng.wang@huawei.com>
Subject: Re: [PATCH v3 1/7] swiotlb: make io_tlb_default_mem local to swiotlb.c
Date: Tue, 27 Jun 2023 17:48:02 +0200 [thread overview]
Message-ID: <20230627154802.GA29567@lst.de> (raw)
In-Reply-To: <20230627133006.16ee11af@meshulam.tesarici.cz>
On Tue, Jun 27, 2023 at 01:30:06PM +0200, Petr Tesařík wrote:
> Xen is the only user of an "is SWIOTLB present" interface. IIUC Xen
> needs bounce buffers for the PCI frontend driver, but if there is no
> other reason to have a SWIOTLB, the system does not set up one at boot.
Please take a look at my "unexport swiotlb_active v2" series that
unfortunately missed the 6.5 merge window waiting for reviews.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: "Petr Tesařík" <petr@tesarici.cz>
Cc: Robin Murphy <robin.murphy@arm.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Petr Tesarik <petrtesarik@huaweicloud.com>,
Stefano Stabellini <sstabellini@kernel.org>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
<x86@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Juergen Gross <jgross@suse.com>,
Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>,
Christoph Hellwig <hch@lst.de>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Hans de Goede <hdegoede@redhat.com>,
Jason Gunthorpe <jgg@ziepe.ca>, Kees Cook <keescook@chromium.org>,
Saravana Kannan <saravanak@google.com>,
"moderated list:XEN HYPERVISOR ARM"
<xen-devel@lists.xenproject.org>,
"moderated list:ARM PORT" <linux-arm-kernel@lists.infradead.org>,
open list <linux-kernel@vger.kernel.org>,
"open list:MIPS" <linux-mips@vger.kernel.org>,
"open list:XEN SWIOTLB SUBSYSTEM" <iommu@lists.linux.dev>,
Roberto Sassu <roberto.sassu@huaweicloud.com>,
Kefeng Wang <wangkefeng.wang@huawei.com>
Subject: Re: [PATCH v3 1/7] swiotlb: make io_tlb_default_mem local to swiotlb.c
Date: Tue, 27 Jun 2023 17:48:02 +0200 [thread overview]
Message-ID: <20230627154802.GA29567@lst.de> (raw)
In-Reply-To: <20230627133006.16ee11af@meshulam.tesarici.cz>
On Tue, Jun 27, 2023 at 01:30:06PM +0200, Petr Tesařík wrote:
> Xen is the only user of an "is SWIOTLB present" interface. IIUC Xen
> needs bounce buffers for the PCI frontend driver, but if there is no
> other reason to have a SWIOTLB, the system does not set up one at boot.
Please take a look at my "unexport swiotlb_active v2" series that
unfortunately missed the 6.5 merge window waiting for reviews.
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linux-arm-kernel@lists.infradead.org
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next prev parent reply other threads:[~2023-06-27 15:58 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-27 9:54 [PATCH v3 0/7] Allow dynamic allocation of software IO TLB bounce buffers Petr Tesarik
2023-06-27 9:54 ` Petr Tesarik
2023-06-27 9:54 ` [PATCH v3 1/7] swiotlb: make io_tlb_default_mem local to swiotlb.c Petr Tesarik
2023-06-27 9:54 ` Petr Tesarik
2023-06-27 10:24 ` Greg Kroah-Hartman
2023-06-27 10:24 ` Greg Kroah-Hartman
2023-06-27 10:55 ` Robin Murphy
2023-06-27 10:55 ` Robin Murphy
2023-06-27 11:11 ` Petr Tesařík
2023-06-27 11:11 ` Petr Tesařík
2023-06-27 11:30 ` Petr Tesařík
2023-06-27 11:30 ` Petr Tesařík
2023-06-27 15:48 ` Christoph Hellwig [this message]
2023-06-27 15:48 ` Christoph Hellwig
2023-06-27 17:24 ` Petr Tesařík
2023-06-27 17:24 ` Petr Tesařík
2023-06-27 9:54 ` [PATCH v3 2/7] swiotlb: add documentation and rename swiotlb_do_find_slots() Petr Tesarik
2023-06-27 9:54 ` Petr Tesarik
2023-06-27 9:54 ` [PATCH v3 3/7] swiotlb: separate memory pool data from other allocator data Petr Tesarik
2023-06-27 9:54 ` Petr Tesarik
2023-06-27 9:54 ` [PATCH v3 4/7] swiotlb: if swiotlb is full, fall back to a transient memory pool Petr Tesarik
2023-06-27 9:54 ` Petr Tesarik
2023-07-06 3:50 ` Michael Kelley (LINUX)
2023-07-06 3:50 ` Michael Kelley (LINUX)
2023-07-06 8:07 ` Greg Kroah-Hartman
2023-07-06 8:07 ` Greg Kroah-Hartman
2023-07-06 14:22 ` Michael Kelley (LINUX)
2023-07-06 14:22 ` Michael Kelley (LINUX)
2023-07-07 9:29 ` Greg Kroah-Hartman
2023-07-07 9:29 ` Greg Kroah-Hartman
2023-07-07 10:22 ` Petr Tesařík
2023-07-07 10:22 ` Petr Tesařík
2023-07-08 15:18 ` Michael Kelley (LINUX)
2023-07-08 15:18 ` Michael Kelley (LINUX)
2023-07-10 9:36 ` Petr Tesařík
2023-07-10 9:36 ` Petr Tesařík
2023-07-11 15:54 ` Michael Kelley (LINUX)
2023-07-11 15:54 ` Michael Kelley (LINUX)
2023-06-27 9:54 ` [PATCH v3 5/7] swiotlb: determine potential physical address limit Petr Tesarik
2023-06-27 9:54 ` Petr Tesarik
2023-06-27 9:54 ` [PATCH v3 6/7] swiotlb: allocate a new memory pool when existing pools are full Petr Tesarik
2023-06-27 9:54 ` Petr Tesarik
2023-06-27 9:54 ` [PATCH v3 7/7] swiotlb: search the software IO TLB only if a device makes use of it Petr Tesarik
2023-06-27 9:54 ` Petr Tesarik
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