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ieee1275: implement vec5 for cas negotiation

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Signed-off-by: Robbie Harwood <rharwood@redhat.com>
This commit is contained in:
Robbie Harwood 2022-08-25 15:40:30 +00:00
parent 714559fb3d
commit c814f068c6
3 changed files with 75 additions and 1 deletions
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70
0281-ieee1275-implement-vec5-for-cas-negotiation.patch Normal file
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@ -0,0 +1,70 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Diego Domingos <diegodo@linux.vnet.ibm.com>
Date: Thu, 25 Aug 2022 11:37:56 -0400
Subject: [PATCH] ieee1275: implement vec5 for cas negotiation
As a legacy support, if the vector 5 is not implemented, Power
Hypervisor will consider the max CPUs as 64 instead 256 currently
supported during client-architecture-support negotiation.
This patch implements the vector 5 and set the MAX CPUs to 256 while
setting the others values to 0 (default).
Signed-off-by: Diego Domingos <diegodo@linux.vnet.ibm.com>
Signed-off-by: Robbie Harwood <rharwood@redhat.com>
---
grub-core/kern/ieee1275/init.c | 20 +++++++++++++++++++-
1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/grub-core/kern/ieee1275/init.c b/grub-core/kern/ieee1275/init.c
index ef55107467..6a51c9efab 100644
--- a/grub-core/kern/ieee1275/init.c
+++ b/grub-core/kern/ieee1275/init.c
@@ -311,6 +311,18 @@ struct option_vector2 {
grub_uint8_t max_pft_size;
} __attribute__((packed));
+struct option_vector5 {
+ grub_uint8_t byte1;
+ grub_uint8_t byte2;
+ grub_uint8_t byte3;
+ grub_uint8_t cmo;
+ grub_uint8_t associativity;
+ grub_uint8_t bin_opts;
+ grub_uint8_t micro_checkpoint;
+ grub_uint8_t reserved0;
+ grub_uint32_t max_cpus;
+} __attribute__((packed));
+
struct pvr_entry {
grub_uint32_t mask;
grub_uint32_t entry;
@@ -329,6 +341,8 @@ struct cas_vector {
grub_uint16_t vec3;
grub_uint8_t vec4_size;
grub_uint16_t vec4;
+ grub_uint8_t vec5_size;
+ struct option_vector5 vec5;
} __attribute__((packed));
/* Call ibm,client-architecture-support to try to get more RMA.
@@ -349,7 +363,7 @@ grub_ieee1275_ibm_cas (void)
} args;
struct cas_vector vector = {
.pvr_list = { { 0x00000000, 0xffffffff } }, /* any processor */
- .num_vecs = 4 - 1,
+ .num_vecs = 5 - 1,
.vec1_size = 0,
.vec1 = 0x80, /* ignore */
.vec2_size = 1 + sizeof(struct option_vector2) - 2,
@@ -360,6 +374,10 @@ grub_ieee1275_ibm_cas (void)
.vec3 = 0x00e0, // ask for FP + VMX + DFP but don't halt if unsatisfied
.vec4_size = 2 - 1,
.vec4 = 0x0001, // set required minimum capacity % to the lowest value
+ .vec5_size = 1 + sizeof(struct option_vector5) - 2,
+ .vec5 = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 256
+ }
};
INIT_IEEE1275_COMMON (&args.common, "call-method", 3, 2);

1
grub.patches
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@ -278,3 +278,4 @@ Patch0277: 0277-Try-reserving-less-ram.patch
Patch0278: 0278-squish-don-t-dup-rhgb-quiet-check-mtimes.patch
Patch0279: 0279-squish-give-up-on-rhgb-quiet.patch
Patch0280: 0280-squish-BLS-only-write-etc-kernel-cmdline-if-writable.patch
Patch0281: 0281-ieee1275-implement-vec5-for-cas-negotiation.patch

5
grub2.spec
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@ -17,7 +17,7 @@
Name: grub2
Epoch: 1
Version: 2.06
Release: 52%{?dist}
Release: 53%{?dist}
Summary: Bootloader with support for Linux, Multiboot and more
License: GPLv3+
URL: http://www.gnu.org/software/grub/
@ -530,6 +530,9 @@ mv ${EFI_HOME}/grub.cfg.stb ${EFI_HOME}/grub.cfg
%endif
%changelog
* Thu Aug 25 2022 Robbie Harwood <rharwood@redhat.com> - 2.06-53
- ieee1275: implement vec5 for cas negotiation
* Wed Aug 17 2022 Robbie Harwood <rharwood@redhat.com> - 2.06-52
- Handle ostree's non-writable /etc/kernel