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From: gengdongjiu <gengdongjiu@huawei.com>
To: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
Cc: <pbonzini@redhat.com>, <mst@redhat.com>, <imammedo@redhat.com>,
	<shannon.zhaosl@gmail.com>, <peter.maydell@linaro.org>,
	<fam@euphon.net>, <rth@twiddle.net>, <ehabkost@redhat.com>,
	<mtosatti@redhat.com>, <xuwei5@huawei.com>, <james.morse@arm.com>,
	<qemu-devel@nongnu.org>, <kvm@vger.kernel.org>,
	<qemu-arm@nongnu.org>, <zhengxiang9@huawei.com>,
	<linuxarm@huawei.com>
Subject: Re: [PATCH v22 4/9] ACPI: Build Hardware Error Source Table
Date: Mon, 10 Feb 2020 19:18:05 +0800
Message-ID: <f24fb648-a06b-0b97-1afa-e4ed6137a7d4@huawei.com> (raw)
In-Reply-To: <20200205164328.00006f1e@Huawei.com>



On 2020/2/6 0:43, Jonathan Cameron wrote:
> On Wed, 8 Jan 2020 19:32:18 +0800
> Dongjiu Geng <gengdongjiu@huawei.com> wrote:
> 
>> This patch builds Hardware Error Source Table(HEST) via fw_cfg blobs.
>> Now it only supports ARMv8 SEA, a type of Generic Hardware Error
>> Source version 2(GHESv2) error source. Afterwards, we can extend
>> the supported types if needed. For the CPER section, currently it
>> is memory section because kernel mainly wants userspace to handle
>> the memory errors.
>>
>> This patch follows the spec ACPI 6.2 to build the Hardware Error
>> Source table. For more detailed information, please refer to
>> document: docs/specs/acpi_hest_ghes.rst
>>
>> build_append_ghes_notify() will help to add Hardware Error Notification
>> to ACPI tables without using packed C structures and avoid endianness
>> issues as API doesn't need explicit conversion.
>>
>> Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com>
>> Signed-off-by: Xiang Zheng <zhengxiang9@huawei.com>
>> Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
>> Acked-by: Xiang Zheng <zhengxiang9@huawei.com>
> 
> Hi. 
> 
> I was forwards porting my old series adding CCIX error injection support
> and came across a place this could 'possibly' be improved.

Jonathan, It is great that you add CCIX error injection support based on this series.
thanks for using it.

> 
> I say possibly because it's really about enabling more flexibility
> in how this code is reused than actually 'fixing' anything here.
> 
> If you don't make the change here, I'll just add a precursor patch to my
> series.  Just seems nice to tidy it up at source.

sure, I make a change to make your patch work well.

> 
> The rest of the partMake your patch very good work.s of this series I am using seems to work great.




> 
> Thanks!
> 
> Jonathan
> 
>> ---
>>  hw/acpi/ghes.c           | 118 ++++++++++++++++++++++++++++++++++++++++++++++-
>>  hw/arm/virt-acpi-build.c |   2 +
>>  include/hw/acpi/ghes.h   |  40 ++++++++++++++++
>>  3 files changed, 159 insertions(+), 1 deletion(-)
>>
>> diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
>> index b7fdbbb..9d37798 100644
>> --- a/hw/acpi/ghes.c
>> +++ b/hw/acpi/ghes.c
>> @@ -34,9 +34,42 @@
>> +
> ...
>> +/* Build Generic Hardware Error Source version 2 (GHESv2) */
>> +static void build_ghes_v2(GArray *table_data, int source_id, BIOSLinker *linker)
> This function takes source ID, which uses the enum of all sources registered.
> However, it doesn't use it to locate the actual physical addresses.
> 
> Currently the code effectively assumes the value is 0.

yes, because there is only one source, so the value is 0.

> 
>> +{
>> +    uint64_t address_offset;
>> +    /*
>> +     * Type:
>> +     * Generic Hardware Error Source version 2(GHESv2 - Type 10)
>> +     */
>> +    build_append_int_noprefix(table_data, ACPI_GHES_SOURCE_GENERIC_ERROR_V2, 2);
>> +    /* Source Id */
>> +    build_append_int_noprefix(table_data, source_id, 2);
>> +    /* Related Source Id */
>> +    build_append_int_noprefix(table_data, 0xffff, 2);
>> +    /* Flags */
>> +    build_append_int_noprefix(table_data, 0, 1);
>> +    /* Enabled */
>> +    build_append_int_noprefix(table_data, 1, 1);
>> +
>> +    /* Number of Records To Pre-allocate */
>> +    build_append_int_noprefix(table_data, 1, 4);
>> +    /* Max Sections Per Record */
>> +    build_append_int_noprefix(table_data, 1, 4);
>> +    /* Max Raw Data Length */
>> +    build_append_int_noprefix(table_data, ACPI_GHES_MAX_RAW_DATA_LENGTH, 4);
>> +
>> +    address_offset = table_data->len;
>> +    /* Error Status Address */
>> +    build_append_gas(table_data, AML_AS_SYSTEM_MEMORY, 0x40, 0,
>> +                     4 /* QWord access */, 0);
>> +    bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE,
>> +        address_offset + GAS_ADDR_OFFSET,
>> +        sizeof(uint64_t), ACPI_GHES_ERRORS_FW_CFG_FILE, 0);
> 
> The offset here would need to be source_id * sizeof(uint64_t) I think
> 
>> +
>> +    /*
>> +     * Notification Structure
>> +     * Now only enable ARMv8 SEA notification type
>> +     */
>> +    build_ghes_hw_error_notification(table_data, ACPI_GHES_NOTIFY_SEA);
> Perhaps a switch for this to allow for other options later.

OK, I will make this change in order to easily support more hardware error source.

> 
> 	switch (source_id) {
> 	case ACPI_HEST_SRC_ID_SEA:
> 		...
> 		break;
> 	default:
> 	//print some error message.
> 
> 	}

ok

>> +
>> +    /* Error Status Block Length */
>> +    build_append_int_noprefix(table_data, ACPI_GHES_MAX_RAW_DATA_LENGTH, 4);
>> +
>> +    /*
>> +     * Read Ack Register
>> +     * ACPI 6.1: 18.3.2.8 Generic Hardware Error Source
>> +     * version 2 (GHESv2 - Type 10)
>> +     */
>> +    address_offset = table_data->len;
>> +    build_append_gas(table_data, AML_AS_SYSTEM_MEMORY, 0x40, 0,
>> +                     4 /* QWord access */, 0);
>> +    bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE,
>> +        address_offset + GAS_ADDR_OFFSET,
>> +        sizeof(uint64_t), ACPI_GHES_ERRORS_FW_CFG_FILE,
>> +        ACPI_GHES_ERROR_SOURCE_COUNT * sizeof(uint64_t));
> 
> Offset of (ACPI_GHES_ERROR_SOURCE_COUNT + source_id) * sizeof(uint64_t)
yes, It due to I only support one source, the source_id is zero and not use it.
In order to easily extend, I will add this change.

> 
>> +
>> +    /*
>> +     * Read Ack Preserve
>> +     * We only provide the first bit in Read Ack Register to OSPM to write
>> +     * while the other bits are preserved.
>> +     */
>> +    build_append_int_noprefix(table_data, ~0x1ULL, 8);
>> +    /* Read Ack Write */
>> +    build_append_int_noprefix(table_data, 0x1, 8);
>> +}
> 
> 
> 
> .
> 


  reply index

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-08 11:32 [PATCH v22 0/9] Add ARMv8 RAS virtualization support in QEMU Dongjiu Geng
2020-01-08 11:32 ` [PATCH v22 1/9] hw/arm/virt: Introduce a RAS machine option Dongjiu Geng
2020-01-08 11:32 ` [PATCH v22 2/9] docs: APEI GHES generation and CPER record description Dongjiu Geng
2020-01-15 15:11   ` Igor Mammedov
2020-01-08 11:32 ` [PATCH v22 3/9] ACPI: Build related register address fields via hardware error fw_cfg blob Dongjiu Geng
2020-01-23 15:14   ` Igor Mammedov
2020-02-02 14:01     ` gengdongjiu
2020-01-08 11:32 ` [PATCH v22 4/9] ACPI: Build Hardware Error Source Table Dongjiu Geng
2020-01-23 15:48   ` Igor Mammedov
2020-02-02 14:21     ` gengdongjiu
2020-02-05 16:43   ` Jonathan Cameron
2020-02-10 11:18     ` gengdongjiu [this message]
2020-01-08 11:32 ` [PATCH v22 5/9] ACPI: Record the Generic Error Status Block address Dongjiu Geng
2020-01-16 16:44   ` Peter Maydell
2020-01-17 10:36     ` gengdongjiu
2020-02-13 15:28     ` gengdongjiu
2020-01-17  7:39   ` Philippe Mathieu-Daudé
2020-01-17 10:47     ` gengdongjiu
2020-01-17 11:20       ` Philippe Mathieu-Daudé
2020-01-28 14:41   ` Igor Mammedov
2020-01-28 16:19     ` Igor Mammedov
2020-02-02 12:44     ` gengdongjiu
2020-02-03  7:51       ` Igor Mammedov
2020-01-08 11:32 ` [PATCH v22 6/9] KVM: Move hwpoison page related functions into kvm-all.c Dongjiu Geng
2020-01-08 11:32 ` [PATCH v22 7/9] ACPI: Record Generic Error Status Block(GESB) table Dongjiu Geng
2020-01-28 15:29   ` Igor Mammedov
2020-02-02 13:42     ` gengdongjiu
2020-02-03  7:55       ` Igor Mammedov
2020-01-08 11:32 ` [PATCH v22 8/9] target-arm: kvm64: handle SIGBUS signal from kernel or KVM Dongjiu Geng
2020-01-16 16:28   ` Peter Maydell
2020-01-16 16:40     ` Peter Maydell
2020-01-17 10:04     ` gengdongjiu
2020-01-20 12:15       ` Peter Maydell
2020-01-22 15:30         ` gengdongjiu
2020-01-08 11:32 ` [PATCH v22 9/9] MAINTAINERS: Add ACPI/HEST/GHES entries Dongjiu Geng
2020-01-16 16:46   ` Peter Maydell
2020-01-17  7:22     ` Philippe Mathieu-Daudé
2020-01-17 10:16       ` gengdongjiu
2020-01-17 11:09       ` Peter Maydell
2020-01-17 11:22         ` Philippe Mathieu-Daudé
2020-01-19  8:19           ` gengdongjiu
2020-01-17 12:19         ` Michael S. Tsirkin
2020-01-09  3:38 ` [PATCH v22 0/9] Add ARMv8 RAS virtualization support in QEMU gengdongjiu

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