Tested this patch series with different values of initrd/initramfs and when vTPM is enabled.
Not seen any 'Grub OOM' with 541MB (total of initrd + vmlinux). Beyond I couldn't test due to disk space issues. Thank You. Tested-by: Nageswara R Sastry <rnsas...@linux.ibm.com> ... Hello, This is an addition to the series sent from Daniel Axtens (https://lists.gnu.org/archive/html/grub-devel/2022-04/msg00064.html). Patch 'ieee1275: request memory with ibm,client-architecture-support' implements vectors 1-4 of client-architecture-support negotiation However, during some tests, we found this can be a problem if: - we have more than 64 CPUs - Hardware Management Console (HMC) is configured to minimum of CPUs >64 (for example, min of 200 CPUs) - Grub needs to request memory. If vector 5 is not implemented, Power Hypervisor will consider the default value for vector 5 and 64 will bet set as the maximum number of CPUs supported by the OS, causing the machine to fail to init. Today we support 256 CPUs (max) on Power, so we need to implement vector 5 and set the MAX CPUs bits to this value. Add an IBM/ieee1275 vTPM 2.0 driver that requires the preceeding memory patches due to the grub's TPM subsystem needing large chunks of memory for hashing of files such as initrd and kernel. Stefan v4: - Removed #ifdef MM_DEBUG's from memtool module - Using latest vec5 from Avnish v3: - Added #if defined(__powerpc__) [1/6] - Address possible integer underlow [3/6] - Added comment why tpm_init() function cannot be called from GRUB_MOD_INIT() - Added Reviewed-by tags to {1,2,5,6}/6 v2: - Followed Daniel K.'s list of suggestions checking the list more than twice and adjusted formatting, line breaks, etc. in all patches - Conditional compilation of ppc64-specific code using #ifdef __powerpc__ - Fixing of installation of memtool; adding of warning message for __powerpc__ since it requires a reboot after running memory stress test - Tested it on i386-pc and PowerKVM Daniel Axtens (4): ieee1275: request memory with ibm, client-architecture-support ieee1275: drop len -= 1 quirk in heap_init ieee1275: support runtime memory claiming Add memtool module with memory allocation stress-test Diego Domingos (1): ieee1275: implement vec5 for cas negotiation Stefan Berger (1): ibmvtpm: Add support for trusted boot using a vTPM 2.0 configure.ac | 1 + docs/grub-dev.texi | 7 +- docs/grub.texi | 3 +- grub-core/Makefile.core.def | 13 + grub-core/commands/ieee1275/ibmvtpm.c | 155 +++++++++ grub-core/commands/memtools.c | 152 +++++++++ grub-core/kern/ieee1275/cmain.c | 5 + grub-core/kern/ieee1275/init.c | 445 +++++++++++++++++++++++++- grub-core/kern/mm.c | 4 + include/grub/ieee1275/ieee1275.h | 13 + 10 files changed, 781 insertions(+), 17 deletions(-) create mode 100644 grub-core/commands/ieee1275/ibmvtpm.c create mode 100644 grub-core/commands/memtools.c -- 2.25.1 _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
