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grub2/SOURCES/0316-ieee1275-implement-vec...

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2.4 KiB

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Diego Domingos <diegodo@linux.vnet.ibm.com>
Date: Mon, 6 Feb 2023 10:03:23 -0500
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>
Acked-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Signed-off-by: Avnish Chouhan <avnish@linux.vnet.ibm.com>
(cherry picked from commit 942f19959fe7465fb52a1da39ff271a7ab704892)
---
grub-core/kern/ieee1275/init.c | 21 ++++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/grub-core/kern/ieee1275/init.c b/grub-core/kern/ieee1275/init.c
index 85af8fa97b..72d4fed312 100644
--- a/grub-core/kern/ieee1275/init.c
+++ b/grub-core/kern/ieee1275/init.c
@@ -502,6 +502,19 @@ struct option_vector2
grub_uint8_t max_pft_size;
} GRUB_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;
+} GRUB_PACKED;
+
struct pvr_entry
{
grub_uint32_t mask;
@@ -523,6 +536,8 @@ 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;
} GRUB_PACKED;
/*
@@ -547,7 +562,7 @@ grub_ieee1275_ibm_cas (void)
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,
@@ -558,6 +573,10 @@ 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, 192, 0, 128, 0, 0, 0, 0, 256
+ }
};
INIT_IEEE1275_COMMON (&args.common, "call-method", 3, 2);