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Date: Mon, 9 May 2022 23:23:00 +0000
From: "ishii.shuuichir@...itsu.com" <ishii.shuuichir@...itsu.com>
To: 'Tyler Baicar' <baicar@...eremail.onmicrosoft.com>,
'Tyler Baicar' <baicar@...amperecomputing.com>,
"patches@...erecomputing.com" <patches@...erecomputing.com>,
"abdulhamid@...amperecomputing.com"
<abdulhamid@...amperecomputing.com>,
"darren@...amperecomputing.com" <darren@...amperecomputing.com>,
"catalin.marinas@....com" <catalin.marinas@....com>,
"will@...nel.org" <will@...nel.org>,
"maz@...nel.org" <maz@...nel.org>,
"james.morse@....com" <james.morse@....com>,
"alexandru.elisei@....com" <alexandru.elisei@....com>,
"suzuki.poulose@....com" <suzuki.poulose@....com>,
"lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
"guohanjun@...wei.com" <guohanjun@...wei.com>,
"sudeep.holla@....com" <sudeep.holla@....com>,
"rafael@...nel.org" <rafael@...nel.org>,
"lenb@...nel.org" <lenb@...nel.org>,
"tony.luck@...el.com" <tony.luck@...el.com>,
"bp@...en8.de" <bp@...en8.de>,
"mark.rutland@....com" <mark.rutland@....com>,
"anshuman.khandual@....com" <anshuman.khandual@....com>,
"vincenzo.frascino@....com" <vincenzo.frascino@....com>,
"tabba@...gle.com" <tabba@...gle.com>,
"marcan@...can.st" <marcan@...can.st>,
"keescook@...omium.org" <keescook@...omium.org>,
"jthierry@...hat.com" <jthierry@...hat.com>,
"masahiroy@...nel.org" <masahiroy@...nel.org>,
"samitolvanen@...gle.com" <samitolvanen@...gle.com>,
"john.garry@...wei.com" <john.garry@...wei.com>,
"daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
"gor@...ux.ibm.com" <gor@...ux.ibm.com>,
"zhangshaokun@...ilicon.com" <zhangshaokun@...ilicon.com>,
"tmricht@...ux.ibm.com" <tmricht@...ux.ibm.com>,
"dchinner@...hat.com" <dchinner@...hat.com>,
"tglx@...utronix.de" <tglx@...utronix.de>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"kvmarm@...ts.cs.columbia.edu" <kvmarm@...ts.cs.columbia.edu>,
"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
"Vineeth.Pillai@...rosoft.com" <Vineeth.Pillai@...rosoft.com>
CC: "ishii.shuuichir@...itsu.com" <ishii.shuuichir@...itsu.com>
Subject: RE: [PATCH 1/2] ACPI/AEST: Initial AEST driver
Hi, Tyler
Thank you for your reply.
After the v2 patch series is posted,
we would like to review the source locations we noted.
Best regards,
Shuuichirou.
> -----Original Message-----
> From: Tyler Baicar <baicar@...eremail.onmicrosoft.com>
> Sent: Monday, May 9, 2022 10:38 PM
> To: Ishii, Shuuichirou/石井 周一郎 <ishii.shuuichir@...itsu.com>; 'Tyler Baicar'
> <baicar@...amperecomputing.com>; patches@...erecomputing.com;
> abdulhamid@...amperecomputing.com; darren@...amperecomputing.com;
> catalin.marinas@....com; will@...nel.org; maz@...nel.org;
> james.morse@....com; alexandru.elisei@....com; suzuki.poulose@....com;
> lorenzo.pieralisi@....com; guohanjun@...wei.com; sudeep.holla@....com;
> rafael@...nel.org; lenb@...nel.org; tony.luck@...el.com; bp@...en8.de;
> mark.rutland@....com; anshuman.khandual@....com;
> vincenzo.frascino@....com; tabba@...gle.com; marcan@...can.st;
> keescook@...omium.org; jthierry@...hat.com; masahiroy@...nel.org;
> samitolvanen@...gle.com; john.garry@...wei.com; daniel.lezcano@...aro.org;
> gor@...ux.ibm.com; zhangshaokun@...ilicon.com; tmricht@...ux.ibm.com;
> dchinner@...hat.com; tglx@...utronix.de; linux-kernel@...r.kernel.org;
> linux-arm-kernel@...ts.infradead.org; kvmarm@...ts.cs.columbia.edu;
> linux-acpi@...r.kernel.org; linux-edac@...r.kernel.org;
> Vineeth.Pillai@...rosoft.com
> Subject: Re: [PATCH 1/2] ACPI/AEST: Initial AEST driver
>
> Hi Shuuichirou,
>
> I should be able to get a v2 patch series out by the end of the month.
>
> Thanks,
> Tyler
>
> On 4/20/2022 3:54 AM, ishii.shuuichir@...itsu.com wrote:
> > Hi, Tyler.
> >
> > When do you plan to post the v2 patch series?
> > Please let me know if you don't mind.
> >
> > Best regards.
> >
> >> -----Original Message-----
> >> From: Tyler Baicar <baicar@...eremail.onmicrosoft.com>
> >> Sent: Friday, December 17, 2021 8:33 AM
> >> To: Ishii, Shuuichirou/石井 周一郎 <ishii.shuuichir@...itsu.com>; 'Tyler
> Baicar'
> >> <baicar@...amperecomputing.com>; patches@...erecomputing.com;
> >> abdulhamid@...amperecomputing.com; darren@...amperecomputing.com;
> >> catalin.marinas@....com; will@...nel.org; maz@...nel.org;
> >> james.morse@....com; alexandru.elisei@....com;
> >> suzuki.poulose@....com; lorenzo.pieralisi@....com;
> >> guohanjun@...wei.com; sudeep.holla@....com; rafael@...nel.org;
> >> lenb@...nel.org; tony.luck@...el.com; bp@...en8.de;
> >> mark.rutland@....com; anshuman.khandual@....com;
> >> vincenzo.frascino@....com; tabba@...gle.com; marcan@...can.st;
> >> keescook@...omium.org; jthierry@...hat.com; masahiroy@...nel.org;
> >> samitolvanen@...gle.com; john.garry@...wei.com;
> >> daniel.lezcano@...aro.org; gor@...ux.ibm.com;
> >> zhangshaokun@...ilicon.com; tmricht@...ux.ibm.com;
> >> dchinner@...hat.com; tglx@...utronix.de;
> >> linux-kernel@...r.kernel.org; linux-arm-kernel@...ts.infradead.org;
> >> kvmarm@...ts.cs.columbia.edu; linux-acpi@...r.kernel.org;
> >> linux-edac@...r.kernel.org; Vineeth.Pillai@...rosoft.com
> >> Subject: Re: [PATCH 1/2] ACPI/AEST: Initial AEST driver
> >>
> >> Hi Shuuichirou,
> >>
> >> Thank you for your feedback!
> >>
> >> On 12/9/2021 3:10 AM, ishii.shuuichir@...itsu.com wrote:
> >>> Hi, Tyler.
> >>>
> >>> We would like to make a few comments.
> >>>
> >>>> -----Original Message-----
> >>>> From: Tyler Baicar <baicar@...amperecomputing.com>
> >>>> Sent: Thursday, November 25, 2021 2:07 AM
> >>>> To: patches@...erecomputing.com;
> abdulhamid@...amperecomputing.com;
> >>>> darren@...amperecomputing.com; catalin.marinas@....com;
> >>>> will@...nel.org; maz@...nel.org; james.morse@....com;
> >>>> alexandru.elisei@....com; suzuki.poulose@....com;
> >>>> lorenzo.pieralisi@....com; guohanjun@...wei.com;
> >>>> sudeep.holla@....com; rafael@...nel.org; lenb@...nel.org;
> >>>> tony.luck@...el.com; bp@...en8.de; mark.rutland@....com;
> >>>> anshuman.khandual@....com; vincenzo.frascino@....com;
> >>>> tabba@...gle.com; marcan@...can.st; keescook@...omium.org;
> >>>> jthierry@...hat.com; masahiroy@...nel.org; samitolvanen@...gle.com;
> >>>> john.garry@...wei.com; daniel.lezcano@...aro.org;
> >>>> gor@...ux.ibm.com; zhangshaokun@...ilicon.com;
> >>>> tmricht@...ux.ibm.com; dchinner@...hat.com; tglx@...utronix.de;
> >>>> linux-kernel@...r.kernel.org; linux-arm-kernel@...ts.infradead.org;
> >>>> kvmarm@...ts.cs.columbia.edu; linux-acpi@...r.kernel.org;
> >>>> linux-edac@...r.kernel.org; Ishii, Shuuichirou/石井
> >>>> 周一郎 <ishii.shuuichir@...itsu.com>; Vineeth.Pillai@...rosoft.com
> >>>> Cc: Tyler Baicar <baicar@...amperecomputing.com>
> >>>> Subject: [PATCH 1/2] ACPI/AEST: Initial AEST driver
> >>>>
> >>>> Add support for parsing the ARM Error Source Table and basic
> >>>> handling of errors reported through both memory mapped and system
> >>>> register
> >> interfaces.
> >>>>
> >>>> Assume system register interfaces are only registered with private
> >>>> peripheral interrupts (PPIs); otherwise there is no guarantee the
> >>>> core handling the error is the core which took the error and has
> >>>> the syndrome info in its system registers.
> >>>>
> >>>> Add logging for all detected errors and trigger a kernel panic if
> >>>> there is any uncorrected error present.
> >>>>
> >>>> Signed-off-by: Tyler Baicar <baicar@...amperecomputing.com>
> >>>> ---
> >>> [...]
> >>>
> >>>> +static int __init aest_init_node(struct acpi_aest_hdr *node) {
> >>>> + union acpi_aest_processor_data *proc_data;
> >>>> + union aest_node_spec *node_spec;
> >>>> + struct aest_node_data *data;
> >>>> + int ret;
> >>>> +
> >>>> + data = kzalloc(sizeof(struct aest_node_data), GFP_KERNEL);
> >>>> + if (!data)
> >>>> + return -ENOMEM;
> >>>> +
> >>>> + data->node_type = node->type;
> >>>> +
> >>>> + node_spec = ACPI_ADD_PTR(union aest_node_spec, node,
> >>>> node->node_specific_offset);
> >>>> +
> >>>> + switch (node->type) {
> >>>> + case ACPI_AEST_PROCESSOR_ERROR_NODE:
> >>>> + memcpy(&data->data, node_spec, sizeof(struct
> >>>> acpi_aest_processor));
> >>>> + break;
> >>>> + case ACPI_AEST_MEMORY_ERROR_NODE:
> >>>> + memcpy(&data->data, node_spec, sizeof(struct
> >>>> acpi_aest_memory));
> >>>> + break;
> >>>> + case ACPI_AEST_SMMU_ERROR_NODE:
> >>>> + memcpy(&data->data, node_spec, sizeof(struct
> >>>> acpi_aest_smmu));
> >>>> + break;
> >>>> + case ACPI_AEST_VENDOR_ERROR_NODE:
> >>>> + memcpy(&data->data, node_spec, sizeof(struct
> >>>> acpi_aest_vendor));
> >>>> + break;
> >>>> + case ACPI_AEST_GIC_ERROR_NODE:
> >>>> + memcpy(&data->data, node_spec, sizeof(struct
> >>>> acpi_aest_gic));
> >>>> + break;
> >>>> + default:
> >>>> + kfree(data);
> >>>> + return -EINVAL;
> >>>> + }
> >>>> +
> >>>> + if (node->type == ACPI_AEST_PROCESSOR_ERROR_NODE) {
> >>>> + proc_data = ACPI_ADD_PTR(union
> acpi_aest_processor_data,
> >>>> node_spec,
> >>>> +
> sizeof(acpi_aest_processor));
> >>>> +
> >>>> + switch (data->data.processor.resource_type) {
> >>>> + case ACPI_AEST_CACHE_RESOURCE:
> >>>> + memcpy(&data->proc_data, proc_data,
> >>>> + sizeof(struct
> acpi_aest_processor_cache));
> >>>> + break;
> >>>> + case ACPI_AEST_TLB_RESOURCE:
> >>>> + memcpy(&data->proc_data, proc_data,
> >>>> + sizeof(struct
> acpi_aest_processor_tlb));
> >>>> + break;
> >>>> + case ACPI_AEST_GENERIC_RESOURCE:
> >>>> + memcpy(&data->proc_data, proc_data,
> >>>> + sizeof(struct
> acpi_aest_processor_generic));
> >>>> + break;
> >>>> + }
> >>>> + }
> >>>> +
> >>>> + ret = aest_init_interface(node, data);
> >>>> + if (ret) {
> >>>> + kfree(data);
> >>>> + return ret;
> >>>> + }
> >>>> +
> >>>> + return aest_init_interrupts(node, data);
> >>> If aest_init_interrupts() failed, is it necessary to release the
> >>> data pointer acquired by kzalloc?
> >> aest_init_interrupts() returns an error if any of the interrupts in
> >> the interrupt list fails, but it's possible that some interrupts in
> >> the list registered successfully. So we attempt to keep chugging
> >> along in that scenario because some interrupts may be enabled and
> >> registered with the interface successfully. If any interrupt
> >> registration fails, there will be a print notifying that there was a failure when
> initializing that node.
> >>>> +}
> >>>> +
> >>>> +static void aest_count_ppi(struct acpi_aest_hdr *node) {
> >>>> + struct acpi_aest_node_interrupt *interrupt;
> >>>> + int i;
> >>>> +
> >>>> + interrupt = ACPI_ADD_PTR(struct acpi_aest_node_interrupt,
> node,
> >>>> + node->node_interrupt_offset);
> >>>> +
> >>>> + for (i = 0; i < node->node_interrupt_count; i++, interrupt++) {
> >>>> + if (interrupt->gsiv >= 16 && interrupt->gsiv < 32)
> >>>> + num_ppi++;
> >>>> + }
> >>>> +}
> >>>> +
> >>>> +static int aest_starting_cpu(unsigned int cpu) {
> >>>> + int i;
> >>>> +
> >>>> + for (i = 0; i < num_ppi; i++)
> >>>> + enable_percpu_irq(ppi_irqs[i], IRQ_TYPE_NONE);
> >>>> +
> >>>> + return 0;
> >>>> +}
> >>>> +
> >>>> +static int aest_dying_cpu(unsigned int cpu) {
> >>> Wouldn't it be better to execute disable_percpu_irq(), which is
> >>> paired with enable_percpu_irq(), in aest_dying_cpu()?
> >>
> >> Good point. I will add that in the next version.
> >>
> >> Thanks,
> >>
> >> Tyler
> >
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