From: Tianyu Lan <ltykernel@gmail.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: corbet@lwn.net, rafael@kernel.org, len.brown@intel.com,
pavel@ucw.cz, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
m.szyprowski@samsung.com, robin.murphy@arm.com,
paulmck@kernel.org, akpm@linux-foundation.org,
keescook@chromium.org, songmuchun@bytedance.com,
rdunlap@infradead.org, damien.lemoal@opensource.wdc.com,
michael.h.kelley@microsoft.com, kys@microsoft.com,
Tianyu Lan <Tianyu.Lan@microsoft.com>,
iommu@lists.linux-foundation.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
vkuznets@redhat.com, wei.liu@kernel.org, parri.andrea@gmail.com,
thomas.lendacky@amd.com, linux-hyperv@vger.kernel.org,
kirill.shutemov@intel.com, andi.kleen@intel.com,
Andi Kleen <ak@linux.intel.com>
Subject: Re: [PATCH 2/2] x86/ACPI: Set swiotlb area according to the number of lapic entry in MADT
Date: Fri, 1 Jul 2022 01:02:21 +0800 [thread overview]
Message-ID: <a876f862-c005-108d-e6f9-68336a8d89f0@gmail.com> (raw)
In-Reply-To: <YrxcCZKvFYjxLf9n@infradead.org>
On 6/29/2022 10:04 PM, Christoph Hellwig wrote:
> On Mon, Jun 27, 2022 at 11:31:50AM -0400, Tianyu Lan wrote:
>> From: Tianyu Lan <Tianyu.Lan@microsoft.com>
>>
>> When initialize swiotlb bounce buffer, smp_init() has not been
>> called and cpu number can not be got from num_online_cpus().
>> Use the number of lapic entry to set swiotlb area number and
>> keep swiotlb area number equal to cpu number on the x86 platform.
>
> Can we reorder that initialization? Because I really hate having
> to have an arch hook in every architecture.
How about using "flags" parameter of swiotlb_init() to pass area number
or add new parameter for area number?
I just reposted patch 1 since there is just some coding style issue and
area number may also set via swiotlb kernel parameter. We still need
figure out a good solution to pass area number from architecture code.
next prev parent reply other threads:[~2022-06-30 17:02 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-27 15:31 [PATCH 0/2] swiotlb: Split up single swiotlb lock Tianyu Lan
2022-06-27 15:31 ` [PATCH 1/2] " Tianyu Lan
2022-06-29 14:09 ` Christoph Hellwig
2022-06-27 15:31 ` [PATCH 2/2] x86/ACPI: Set swiotlb area according to the number of lapic entry in MADT Tianyu Lan
2022-06-29 14:04 ` Christoph Hellwig
2022-06-30 17:02 ` Tianyu Lan [this message]
2022-07-06 8:00 ` Christoph Hellwig
2022-07-06 8:57 ` Tianyu Lan
2022-07-06 9:02 ` Christoph Hellwig
2022-07-06 10:21 ` Tianyu Lan
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