grub2/SOURCES/0578-ieee1275-extended-support-in-options-vector5.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Avnish Chouhan <avnish@linux.vnet.ibm.com>
Date: Thu, 23 Mar 2023 08:33:12 -0400
Subject: [PATCH] ieee1275 : extended support in options vector5
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This patch enables the multiple options in Options Vector5 which are
required and solves the boot issue seen on some machines which are looking for these specific options.

1. LPAR : Client program supports logical partitioning and
   associated hcall()s.
2. SPLPAR : Client program supports the Shared
   Processor LPAR Option.
3. DYN_RCON_MEM : Client program supports the
   “ibm,dynamic-reconfiguration-memory” property and it may be
   presented in the device tree.
4. LARGE_PAGES : Client supports pages larger than 4 KB.
5. DONATE_DCPU_CLS : Client supports donating dedicated processor cycles.
6. PCI_EXP : Client supports PCI Express implementations
   utilizing Message Signaled Interrupts (MSIs).

7. CMOC : Enables the Cooperative Memory Over-commitment Option.
8. EXT_CMO : Enables the Extended Cooperative Memory Over-commit
   Option.

9. ASSOC_REF : Enables “ibm,associativity” and
   “ibm,associativity-reference-points” properties.
10. AFFINITY : Enables Platform Resource Reassignment Notification.
11. NUMA : Supports NUMA Distance Lookup Table Option.

12. HOTPLUG_INTRPT : Supports Hotplug Interrupts.
13. HPT_RESIZE : Enable Hash Page Table Resize Option.

14. MAX_CPU : Defines maximum number of CPUs supported.

15. PFO_HWRNG : Supports Random Number Generator.
16. PFO_HW_COMP : Supports Compression Engine.
17. PFO_ENCRYPT : Supports Encryption Engine.

18. SUB_PROCESSORS : Supports Sub-Processors.

19. DY_MEM_V2 : Client program supports the “ibm,dynamic-memory-v2” property in the
    “ibm,dynamic-reconfiguration-memory” node and it may be presented in the device tree.
20. DRC_INFO : Client program supports the “ibm,drc-info” property definition and it may be
    presented in the device tree.

Signed-off-by: Avnish Chouhan <avnish@linux.vnet.ibm.com>
---
 grub-core/kern/ieee1275/init.c | 47 ++++++++++++++++++++++++++++++++++++------
 1 file changed, 41 insertions(+), 6 deletions(-)

diff --git a/grub-core/kern/ieee1275/init.c b/grub-core/kern/ieee1275/init.c
index 2516e02091cb..1fae84440403 100644
--- a/grub-core/kern/ieee1275/init.c
+++ b/grub-core/kern/ieee1275/init.c
@@ -56,11 +56,41 @@ extern char _end[];
 grub_addr_t grub_ieee1275_original_stack;
 #endif
 
-#define LPAR     0x80
-#define SPLPAR   0x40
-#define BYTE2    (LPAR | SPLPAR)
-#define CMO      0x80
-#define MAX_CPU  256
+/* Options vector5 properties */
+
+#define LPAR                0x80
+#define SPLPAR              0x40
+#define DYN_RCON_MEM        0x20
+#define LARGE_PAGES         0x10
+#define DONATE_DCPU_CLS     0x02
+#define PCI_EXP             0x01
+#define BYTE2               (LPAR | SPLPAR | DYN_RCON_MEM | LARGE_PAGES | DONATE_DCPU_CLS | PCI_EXP)
+
+#define CMOC                0x80
+#define EXT_CMO             0x40
+#define CMO                 (CMOC | EXT_CMO)
+
+#define ASSOC_REF           0x80
+#define AFFINITY            0x40
+#define NUMA                0x20
+#define ASSOCIATIVITY       (ASSOC_REF | AFFINITY | NUMA)
+
+#define HOTPLUG_INTRPT      0x04
+#define HPT_RESIZE          0x01
+#define BIN_OPTS            (HOTPLUG_INTRPT | HPT_RESIZE)
+
+#define MAX_CPU             256
+
+#define PFO_HWRNG           0x80000000
+#define PFO_HW_COMP         0x40000000
+#define PFO_ENCRYPT         0x20000000
+#define PLATFORM_FACILITIES (PFO_HWRNG | PFO_HW_COMP | PFO_ENCRYPT)
+
+#define SUB_PROCESSORS      1
+
+#define DY_MEM_V2           0x80
+#define DRC_INFO            0x40
+#define BYTE22              (DY_MEM_V2 | DRC_INFO)
 
 void
 grub_exit (int rc __attribute__((unused)))
@@ -323,6 +353,11 @@ struct option_vector5 {
         grub_uint8_t micro_checkpoint;
         grub_uint8_t reserved0;
         grub_uint32_t max_cpus;
+        grub_uint16_t base_PAPR;
+        grub_uint16_t mem_reference;
+        grub_uint32_t platform_facilities;
+        grub_uint8_t sub_processors;
+        grub_uint8_t byte22;
 } __attribute__((packed));
 
 struct pvr_entry {
@@ -378,7 +413,7 @@ grub_ieee1275_ibm_cas (void)
     .vec4 = 0x0001, // set required minimum capacity % to the lowest value
     .vec5_size = 1 + sizeof(struct option_vector5) - 2,
     .vec5 = {
-        0, BYTE2, 0, CMO, 0, 0, 0, 0, MAX_CPU	
+        0, BYTE2, 0, CMO, ASSOCIATIVITY, BIN_OPTS, 0, 0, MAX_CPU, 0, 0, PLATFORM_FACILITIES, SUB_PROCESSORS, BYTE22
     }
   };