Messages in this thread | | | Date | Wed, 27 Aug 2014 10:49:31 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH] x86: only load initrd above 4g on second try |
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On 08/26/2014 03:05 PM, Yinghai Lu wrote: > > The firmware has bug and can use buffer above 4G to read files. > and if the file size is 512 bytes alignment, then reading could go through. >
File size, or alignment? Different things. Again, your patch description is not just incomplete, but seems to be actively misleading.
This does, however, suggest at least two possible solutions:
1. We can read the initramfs into a temporary buffer and memcpy() it to the target.
2. We might be able to align the initramfs buffer to a 512-byte section and then round up the size.
The 512 bytes here is probably a hardware sector, I'm not sure how this will play on 4K-hard-sectored media, although those are few and far between.
-hpa
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