On 6/13/19 1:06 PM, Dave Hansen wrote:
> On 6/13/19 10:59 AM, Lendacky, Thomas wrote:
>>> After I say all that... Why can't you just stick your data in a normal,
>>> vanilla __init variable? Wouldn't that be a lot less subtle?
>> The area needs to be outside of the kernel proper as the kernel is
On 6/13/19 10:59 AM, Lendacky, Thomas wrote:
>> After I say all that... Why can't you just stick your data in a normal,
>> vanilla __init variable? Wouldn't that be a lot less subtle?
> The area needs to be outside of the kernel proper as the kernel is
> encrypted "in place." So an __init variabl
On 6/13/19 12:47 PM, Dave Hansen wrote:
> On 6/12/19 10:46 AM, Lendacky, Thomas wrote:
>> On 6/12/19 10:00 AM, Dave Hansen wrote:
>>> On 6/12/19 6:32 AM, Lendacky, Thomas wrote:
Create a section for SME in the vmlinux.lds.S. Position it after "_end"
so that the memory will be reclaimed d
On 6/12/19 10:46 AM, Lendacky, Thomas wrote:
> On 6/12/19 10:00 AM, Dave Hansen wrote:
>> On 6/12/19 6:32 AM, Lendacky, Thomas wrote:
>>> Create a section for SME in the vmlinux.lds.S. Position it after "_end"
>>> so that the memory will be reclaimed during boot and, since it is all
>>> zeroes, it
Hi,
After applied this patch, i made a test on the following machines. It works
well.
[a] HPE ProLiant DL385 Gen10 (878612-B21) AMD EPYC 7251 8-Core Processor
[b] Dell PowerEdge R7425 AMD EPYC 7401 24-Core Processor
[c] AMD Speedway AMD Eng Sample: 2S1405A3VIHF4_28/14_N
[d] AMD Ethanol X AMD
On 06/12/19 at 01:32pm, Lendacky, Thomas wrote:
> The SME workarea used during early encryption of the kernel during boot
> is situated on a 2MB boundary after the end of the kernel text, data,
> etc. sections (_end). This works well during initial boot of a compressed
> kernel because of the relo
On 6/12/19 10:00 AM, Dave Hansen wrote:
> On 6/12/19 6:32 AM, Lendacky, Thomas wrote:
>> Create a section for SME in the vmlinux.lds.S. Position it after "_end"
>> so that the memory will be reclaimed during boot and, since it is all
>> zeroes, it compresses well.
>
> I don't think I realized th
On 6/12/19 6:32 AM, Lendacky, Thomas wrote:
> Create a section for SME in the vmlinux.lds.S. Position it after "_end"
> so that the memory will be reclaimed during boot and, since it is all
> zeroes, it compresses well.
I don't think I realized that things after _end get reclaimed. Do we do
tha
The SME workarea used during early encryption of the kernel during boot
is situated on a 2MB boundary after the end of the kernel text, data,
etc. sections (_end). This works well during initial boot of a compressed
kernel because of the relocation used for decompression of the kernel.
But when pe
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