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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Diego Domingos <diegodo@linux.vnet.ibm.com>
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Date: Thu, 25 Aug 2022 11:37:56 -0400
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Subject: [PATCH] ieee1275: implement vec5 for cas negotiation
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As a legacy support, if the vector 5 is not implemented, Power
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Hypervisor will consider the max CPUs as 64 instead 256 currently
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supported during client-architecture-support negotiation.
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This patch implements the vector 5 and set the MAX CPUs to 256 while
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setting the others values to 0 (default).
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Signed-off-by: Diego Domingos <diegodo@linux.vnet.ibm.com>
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Signed-off-by: Robbie Harwood <rharwood@redhat.com>
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(cherry picked from commit f735c65b6da8a9d4251242b37774e1a517511253)
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---
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grub-core/kern/ieee1275/init.c | 20 +++++++++++++++++++-
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1 file changed, 19 insertions(+), 1 deletion(-)
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diff --git a/grub-core/kern/ieee1275/init.c b/grub-core/kern/ieee1275/init.c
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index ef55107467..6a51c9efab 100644
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--- a/grub-core/kern/ieee1275/init.c
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+++ b/grub-core/kern/ieee1275/init.c
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@@ -311,6 +311,18 @@ struct option_vector2 {
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grub_uint8_t max_pft_size;
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} __attribute__((packed));
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+struct option_vector5 {
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+ grub_uint8_t byte1;
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+ grub_uint8_t byte2;
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+ grub_uint8_t byte3;
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+ grub_uint8_t cmo;
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+ grub_uint8_t associativity;
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+ grub_uint8_t bin_opts;
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+ grub_uint8_t micro_checkpoint;
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+ grub_uint8_t reserved0;
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+ grub_uint32_t max_cpus;
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+} __attribute__((packed));
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+
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struct pvr_entry {
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grub_uint32_t mask;
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grub_uint32_t entry;
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@@ -329,6 +341,8 @@ struct cas_vector {
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grub_uint16_t vec3;
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grub_uint8_t vec4_size;
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grub_uint16_t vec4;
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+ grub_uint8_t vec5_size;
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+ struct option_vector5 vec5;
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} __attribute__((packed));
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/* Call ibm,client-architecture-support to try to get more RMA.
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@@ -349,7 +363,7 @@ grub_ieee1275_ibm_cas (void)
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} args;
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struct cas_vector vector = {
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.pvr_list = { { 0x00000000, 0xffffffff } }, /* any processor */
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- .num_vecs = 4 - 1,
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+ .num_vecs = 5 - 1,
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.vec1_size = 0,
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.vec1 = 0x80, /* ignore */
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.vec2_size = 1 + sizeof(struct option_vector2) - 2,
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@@ -360,6 +374,10 @@ grub_ieee1275_ibm_cas (void)
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.vec3 = 0x00e0, // ask for FP + VMX + DFP but don't halt if unsatisfied
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.vec4_size = 2 - 1,
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.vec4 = 0x0001, // set required minimum capacity % to the lowest value
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+ .vec5_size = 1 + sizeof(struct option_vector5) - 2,
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+ .vec5 = {
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+ 0, 0, 0, 0, 0, 0, 0, 0, 256
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+ }
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};
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INIT_IEEE1275_COMMON (&args.common, "call-method", 3, 2);
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