Re: [PATCH v9 09/19] x86: Secure Launch kernel late boot stub

ross.philipson
2024-06-04T21:17:39Z

On 6/4/24 12:59 PM, Jarkko Sakkinen wrote:
> On Fri May 31, 2024 at 4:03 AM EEST, Ross Philipson wrote:
>> The routine slaunch_setup is called out of the x86 specific setup_arch()
>> routine during early kernel boot. After determining what platform is
>> present, various operations specific to that platform occur. This
>> includes finalizing setting for the platform late launch and verifying
>> that memory protections are in place.
>>
>> For TXT, this code also reserves the original compressed kernel setup
>> area where the APs were left looping so that this memory cannot be used.
>>
>> Signed-off-by: Ross Philipson <ross.philipson@oracle.com>
>> ---
>> arch/x86/kernel/Makefile | 1 +
>> arch/x86/kernel/setup.c | 3 +
>> arch/x86/kernel/slaunch.c | 525 +++++++++++++++++++++++++++++++++++++
>> drivers/iommu/intel/dmar.c | 4 +
>> 4 files changed, 533 insertions(+)
>> create mode 100644 arch/x86/kernel/slaunch.c
>>
>> diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
>> index 5d128167e2e2..b35ca99ab0a0 100644
>> --- a/arch/x86/kernel/Makefile
>> +++ b/arch/x86/kernel/Makefile
>> @@ -76,6 +76,7 @@ obj-$(CONFIG_X86_32) += tls.o
>> obj-$(CONFIG_IA32_EMULATION) += tls.o
>> obj-y += step.o
>> obj-$(CONFIG_INTEL_TXT) += tboot.o
>> +obj-$(CONFIG_SECURE_LAUNCH) += slaunch.o
>
> Hmm... should that be CONFIG_X86_SECURE_LAUNCH?
>
> Just asking...

It could be if you would like. I guess we just thought it was implied
given its location.

Ross

>
> BR, Jarkko