Messages in this thread |  | | Subject | Re: [PATCH v3 0/5] x86: SME: BSP/SME microcode update fix | From | Gabriel C <> | Date | Wed, 10 Jan 2018 22:14:53 +0100 |
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On 10.01.2018 20:25, Tom Lendacky wrote:
Hi Tom ,
> This patch series addresses an issue when SME is active and the BSP > is attempting to check for and load microcode during load_ucode_bsp(). > Since the initrd has not been decrypted (yet) and the virtual address > of the initrd treats the memory as encrypted, the CPIO archive parsing > fails to locate the microcode. > > This series moves the encryption of the initrd into the early boot code > and encrypts it at the same time that the kernel is encrypted. Since > the initrd is now encrypted, the CPIO archive parsing succeeds in > properly locating the microcode. > > The following patches are included in this fix: > - Cleanup register saving in arch/x86/mm/mem_encrypt_boot.S > - Reduce parameters and complexity for creating the SME PGD mappings > - Centralize the use of the PMD flags used in sme_encrypt_kernel() in > preparation for using PTE flags also. > - Prepare sme_encrypt_kernel() to handle PAGE aligned encryption, not > just 2MB large page aligned encryption. > - Encrypt the initrd in sme_encrypt_kernel() when the kernel is being > encrypted. > > This patch series is based on tip/master.
Is something in tip/master the patch serie need ?
I would like to test the serie however tip/master breaks my box.. On tip/master there is no way to boot with mem_crypt=on with or without your patches.
With mem_crypt=off the box at least boots to a point , seems APCI breaks on tip/master.
If someone want to take a look , a dmesg of the broken boot can be found there:
http://sigsegv.24-7.ro/~crazy/tip-master/dmesg-tip-master.txt
Regards,
Gabriel C
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