From: Hanjun Guo <guohanjun@huawei.com>
To: Robert Richter <robert.richter@caviumnetworks.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
Will Deacon <will.deacon@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Ganapatrao Kulkarni <gkulkarni@caviumnetworks.com>,
Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>,
Shannon Zhao <shannon.zhao@linaro.org>,
Steve Capper <steve.capper@linaro.org>,
Mark Rutland <mark.rutland@arm.com>,
Hanjun Guo <hanjun.guo@linaro.org>
Subject: Re: [PATCH v3 05/12] arm64, acpi, numa: NUMA support based on SRAT and SLIT
Date: Wed, 27 Jan 2016 15:12:15 +0800 [thread overview]
Message-ID: <56A86DCF.1020205@huawei.com> (raw)
In-Reply-To: <20160125102148.GE24726@rric.localdomain>
On 2016/1/25 18:21, Robert Richter wrote:
> On 23.01.16 17:39:20, Hanjun Guo wrote:
>> diff --git a/arch/arm64/kernel/acpi_numa.c b/arch/arm64/kernel/acpi_numa.c
>> new file mode 100644
>> index 0000000..f7f7533
>> --- /dev/null
>> +++ b/arch/arm64/kernel/acpi_numa.c
>> +/* Callback for parsing of the Proximity Domain <-> Memory Area mappings */
>> +int __init acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
>> +{
>> + u64 start, end;
>> + int node, pxm;
>> +
>> + if (srat_disabled())
>> + return -EINVAL;
>> +
>> + if (ma->header.length != sizeof(struct acpi_srat_mem_affinity)) {
> Must be:
>
> ma->header.length < sizeof(struct acpi_srat_mem_affinity)) {
>
> Allow extensions to struct acpi_srat_mem_affinity in newer versions.
Hmm, I think we need to remove the check here now.
There are three cases:
- firmware ACPI version is consistent with the ACPICA one, then
ma->header.length == sizeof(struct acpi_srat_mem_affinity )
- firmware ACPI version is not consistent with the ACPICA one,
for example, struct acpi_srat_mem_affinity is extended in
new ACI version, but the formware is using the older one,
then it's ok to use
ma->header.length < sizeof(struct acpi_srat_mem_affinity )
- but if we use the older kernel + updated new firmware,
then
ma->header.length > sizeof(struct acpi_srat_mem_affinity )
will be the case, right?
>
>> + bad_srat();
>> + return -EINVAL;
> We need a pr_err() here to avoid that numa setup fails silently due to
> bad fw. This applies to all error paths.
>
> See my delta patch below. You can merge it with your patch.
Thanks! I wil merge it into next version.
Hanjun
next prev parent reply other threads:[~2016-01-27 7:12 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-23 9:39 [PATCH v3 00/12] ACPI NUMA support for ARM64 Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 01/12] acpi, numa: Use pr_fmt() instead of printk Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 02/12] acpi, numa: Replace ACPI_DEBUG_PRINT() with pr_debug() Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 03/12] acpi, numa: remove duplicate NULL check Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 04/12] acpi, numa: introduce ACPI_HAS_NUMA_ARCH_FIXUP Hanjun Guo
2016-01-23 10:25 ` Robert Richter
2016-01-24 4:56 ` Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 05/12] arm64, acpi, numa: NUMA support based on SRAT and SLIT Hanjun Guo
2016-01-25 10:21 ` Robert Richter
2016-01-27 7:12 ` Hanjun Guo [this message]
2016-01-27 14:01 ` Robert Richter
2016-01-28 3:16 ` Hanjun Guo
2016-02-01 18:09 ` Robert Richter
2016-02-02 11:30 ` Hanjun Guo
2016-02-02 17:00 ` Lorenzo Pieralisi
2016-03-02 14:10 ` Matthias Brugger
2016-03-02 14:10 ` Matthias Brugger
2016-03-02 14:08 ` Matthias Brugger
2016-03-10 9:50 ` Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 06/12] acpi, numa: Enable ACPI based NUMA on ARM64 Hanjun Guo
2016-01-29 16:37 ` Robert Richter
2016-01-23 9:39 ` [PATCH v3 07/12] acpi, numa: move acpi_numa_slit_init() to common place Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 08/12] arm64, numa: rework numa_add_memblk() Hanjun Guo
2016-01-25 9:34 ` Robert Richter
2016-01-27 6:20 ` Hanjun Guo
2016-03-09 12:27 ` Robert Richter
2016-03-10 10:10 ` Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 09/12] x86, acpi, numa: cleanup acpi_numa_processor_affinity_init() Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 10/12] acpi, numa: move bad_srat() and srat_disabled() to common place Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 11/12] acpi, numa: remove unneeded acpi_numa=1 Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 12/12] acpi, numa: reuse acpi_numa_memory_affinity_init() Hanjun Guo
2016-01-25 10:26 ` Robert Richter
2016-01-27 6:15 ` Hanjun Guo
2016-01-27 14:18 ` Robert Richter
2016-01-28 2:48 ` Hanjun Guo
2016-01-28 13:31 ` Robert Richter
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