diff --git a/0361-powerpc-increase-MIN-RMA-size-for-CAS-negotiation.patch b/0361-powerpc-increase-MIN-RMA-size-for-CAS-negotiation.patch new file mode 100644 index 0000000..9c3a3fd --- /dev/null +++ b/0361-powerpc-increase-MIN-RMA-size-for-CAS-negotiation.patch @@ -0,0 +1,117 @@ +From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 +From: Avnish Chouhan +Date: Thu, 13 Mar 2025 19:45:50 +0530 +Subject: [PATCH] powerpc: increase MIN RMA size for CAS negotiation + +Change RMA size from 512 MB to 768 MB which will result +in more memory at boot time for PowerPC. When vTPM, Secure Boot or +FADump are enabled on PowerPC, the 512 MB RMA memory is not sufficient for +booting. With this 512 MB RMA, GRUB2 runs out of memory and fails to +boot the machine. Sometimes even usage of CDROM requires more memory +for installation and along with the options mentioned above exhausts +the boot memory which results in boot failures. Increasing the RMA size +will resolves multiple out of memory issues observed in PowerPC. + +Failure details (GRUB2 debugs): + + kern/ieee1275/init.c:550: mm requested region of size 8513000, flags 1 + kern/ieee1275/init.c:563: Cannot satisfy allocation and retain minimum runtime space + kern/ieee1275/init.c:550: mm requested region of size 8513000, flags 0 + kern/ieee1275/init.c:563: Cannot satisfy allocation and retain minimum runtime space + kern/file.c:215: Closing `/ppc/ppc64/initrd.img' ... + kern/disk.c:297: Closing `ieee1275//vdevice/v-scsi@30000067/disk@8300000000000000'... + kern/disk.c:311: Closing `ieee1275//vdevice/v-scsi@30000067/disk@8300000000000000' succeeded. + kern/file.c:225: Closing `/ppc/ppc64/initrd.img' failed with 3. + kern/file.c:148: Opening `/ppc/ppc64/initrd.img' succeeded. + error: ../../grub-core/kern/mm.c:552:out of memory. + +Signed-off-by: Avnish Chouhan +--- + grub-core/kern/ieee1275/init.c | 51 +++++++++++++++++++++++++++++++++++++----- + 1 file changed, 46 insertions(+), 5 deletions(-) + +diff --git a/grub-core/kern/ieee1275/init.c b/grub-core/kern/ieee1275/init.c +index 6c5f4fb77afa..482cad20903e 100644 +--- a/grub-core/kern/ieee1275/init.c ++++ b/grub-core/kern/ieee1275/init.c +@@ -782,7 +782,7 @@ struct cas_vector + + /* + * Call ibm,client-architecture-support to try to get more RMA. +- * We ask for 512MB which should be enough to verify a distro kernel. ++ * We ask for 768MB which should be enough to verify a distro kernel. + * We ignore most errors: if we don't succeed we'll proceed with whatever + * memory we have. + */ +@@ -854,7 +854,7 @@ grub_ieee1275_ibm_cas (void) + .vec1 = 0x80, /* ignore */ + .vec2_size = 1 + sizeof (struct option_vector2) - 2, + .vec2 = { +- 0, 0, -1, -1, -1, -1, -1, 512, -1, 0, 48 ++ 0, 0, -1, -1, -1, -1, -1, 768, -1, 0, 48 + }, + .vec3_size = 2 - 1, + .vec3 = 0x00e0, /* ask for FP + VMX + DFP but don't halt if unsatisfied */ +@@ -891,6 +891,10 @@ grub_claim_heap (void) + { + grub_err_t err; + grub_uint32_t total = HEAP_MAX_SIZE; ++#if defined(__powerpc__) ++ grub_uint32_t ibm_ca_support_reboot = 0; ++ grub_ssize_t actual; ++#endif + + err = grub_ieee1275_total_mem (&rmo_top); + +@@ -903,11 +907,48 @@ grub_claim_heap (void) + grub_mm_add_region_fn = grub_ieee1275_mm_add_region; + + #if defined(__powerpc__) ++ /* Check if it's a CAS reboot with below property. If so, we will skip CAS call */ ++ if (grub_ieee1275_get_integer_property (grub_ieee1275_chosen, ++ "ibm,client-architecture-support-reboot", ++ &ibm_ca_support_reboot, ++ sizeof (ibm_ca_support_reboot), ++ &actual) >= 0) ++ grub_dprintf ("ieee1275", "ibm,client-architecture-support-reboot: %" PRIuGRUB_UINT32_T "\n", ++ ibm_ca_support_reboot); ++ + if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_CAN_TRY_CAS_FOR_MORE_MEMORY)) + { +- /* if we have an error, don't call CAS, just hope for the best */ +- if (err == GRUB_ERR_NONE && rmo_top < (512 * 1024 * 1024)) +- grub_ieee1275_ibm_cas (); ++ /* ++ * If we have an error, don't call CAS. Just hope for the best. ++ * Along with the above, if the rmo_top is 512 MB or above. We ++ * will skip the CAS call. However, if we call CAS, the rmo_top ++ * will be set to 768 MB via CAS Vector2. But we need to call ++ * CAS with "rmo_top < 512 MB" to avoid the issue on the older ++ * Linux kernel, which still uses rmo_top as 512 MB. If we call ++ * CAS with a condition "rmo_top < 768 MB", it will result in an ++ * issue due to the IBM CAS reboot feature and we won't be able ++ * to boot the newer kernel. Whenever a reboot is detected as ++ * the CAS reboot by GRUB. It will boot the machine with the ++ * last booted kernel by reading the variable "boot-last-label" ++ * which has the info related to the last boot and it's specific ++ * to IBM PowerPC. Due to this, the machine will boot with the ++ * last booted kernel which has rmo_top as 512 MB. Also, if the ++ * reboot is detected as a CAS reboot, the GRUB will skip the CAS ++ * call. As the CAS has already been called earlier, so it is ++ * not required to call CAS even if the other conditions are met. ++ * This condition will also prevent a scenario where the machine ++ * get stuck in the CAS reboot loop while booting. A machine with ++ * an older kernel, having option_vector2 MIN_RMA as 512 MB in ++ * Linux prom_init.c and GRUB uses "rmo_top < 768 MB" condition ++ * for calling CAS. Due to their respective conditions, linux ++ * CAS and GRUB CAS will keep doing the CAS calls and change ++ * the MIN_RMA from 768(changed by GRUB) to 512(changed by Linux) ++ * to 768(changed by GRUB) to 512(changed by Linux) and so on, ++ * and the machine will stuck in this CAS reboot loop forever. ++ * IBM PAPR : https://openpower.foundation/specifications/linuxonpower/ ++ */ ++ if (!ibm_ca_support_reboot && err == GRUB_ERR_NONE && rmo_top < (512 * 1024 * 1024)) ++ grub_ieee1275_ibm_cas (); + } + #endif + diff --git a/grub.patches b/grub.patches index cf8ec16..2ca6a9b 100644 --- a/grub.patches +++ b/grub.patches @@ -357,3 +357,4 @@ Patch0357: 0357-kern-misc-Add-sanity-check-after-grub_strtoul-call.patch Patch0358: 0358-loader-i386-linux-Cast-left-shift-to-grub_uint32_t.patch Patch0359: 0359-loader-i386-bsd-Use-safe-math-to-avoid-underflow.patch Patch0360: 0360-fs-ext2-Rework-out-of-bounds-read-for-inline-and-ext.patch +Patch0361: 0361-powerpc-increase-MIN-RMA-size-for-CAS-negotiation.patch diff --git a/grub2.spec b/grub2.spec index 9e523eb..3f0d001 100644 --- a/grub2.spec +++ b/grub2.spec @@ -17,7 +17,7 @@ Name: grub2 Epoch: 1 Version: 2.12 -Release: 12%{?dist}.alma.1 +Release: 13%{?dist}.alma.1 Summary: Bootloader with support for Linux, Multiboot and more License: GPL-3.0-or-later URL: http://www.gnu.org/software/grub/ @@ -574,9 +574,13 @@ mv ${EFI_HOME}/grub.cfg.stb ${EFI_HOME}/grub.cfg %endif %changelog -* Wed Mar 12 2025 Eduard Abdullin - 1:2.12-12.alma.1 +* Wed Mar 19 2025 Eduard Abdullin - 1:2.12-13.alma.1 - Debrand for AlmaLinux +* Tue Mar 18 2025 Nicolas Frayer 2.12-13 +- powerpc: increase MIN RMA size for CAS negotiation +- Resolves: #RHEL-76429 + * Mon Mar 10 2025 Leo Sandoval 2.12-12 - Remove 'fs/ntfs: Implement attribute verification' patch - Related: RHEL-80686