Messages in this thread | | | Date | Mon, 1 Nov 2021 13:21:36 +0200 | From | Andy Shevchenko <> | Subject | Re: [PATCH v7 2/4] drivers/acpi: Introduce Platform Firmware Runtime Update device driver |
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On Mon, Nov 01, 2021 at 05:33:20PM +0800, Chen Yu wrote: > On Wed, Oct 27, 2021 at 01:20:33PM +0300, Andy Shevchenko wrote: > > On Wed, Oct 27, 2021 at 03:07:51PM +0800, Chen Yu wrote:
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> > > + guid_t *image_type_id = &img_hdr->image_type_id; > > > > efi_guid_t ? > > > efi_guid_t is a 32-bit aligned guid_t, which is for the case when > efi_guid_t* arguments are 32-bit aligned. And it is for 32-bit ARM. > Since this code injection is only for 64-bit, the guid is not required > to be strictly 32-bit aligned I suppose?
But the type of that member may not be guid_t. So, I expect not to see guid_t at all here or as a internal member with the export/import GUID API in place.
See, for example d1c6e08e7503 ("libnvdimm/labels: Add uuid helpers")
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> > > + ret = guid_parse(PFRU_UUID, &pfru_dev->uuid);
> > > + ret = guid_parse(PFRU_CODE_INJ_UUID, &pfru_dev->code_uuid);
> > > + ret = guid_parse(PFRU_DRV_UPDATE_UUID, &pfru_dev->drv_uuid);
> > Why do you need to keep zillions of copies of the data which seems > > is not going to be changed? Three global variables should be enough, > > no? > > > The guid information is embedded in each pfru_dev and only calculated > once during probe. I thought people try to avoid using global variables > if possible?
Use your common sense. You might have a lot of data duplication, and this data is definitely not something that needs any kind of serialization / personification / etc.
-- With Best Regards, Andy Shevchenko
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