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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: Mon, 6 Feb 2023 10:03:23 -0500
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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 Hypervisor will
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consider the max CPUs as 64 instead 256 currently supported during
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client-architecture-support negotiation.
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This patch implements the vector 5 and set the MAX CPUs to 256 while setting the
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others values to 0 (default).
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Signed-off-by: Diego Domingos <diegodo@linux.vnet.ibm.com>
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Acked-by: Daniel Axtens <dja@axtens.net>
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Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
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Signed-off-by: Avnish Chouhan <avnish@linux.vnet.ibm.com>
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(cherry picked from commit 942f19959fe7465fb52a1da39ff271a7ab704892)
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---
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grub-core/kern/ieee1275/init.c | 21 ++++++++++++++++++++-
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1 file changed, 20 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 85af8fa97b..72d4fed312 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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@@ -502,6 +502,19 @@ struct option_vector2
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grub_uint8_t max_pft_size;
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} GRUB_PACKED;
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+struct option_vector5
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+{
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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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+} GRUB_PACKED;
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+
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struct pvr_entry
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{
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grub_uint32_t mask;
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@@ -523,6 +536,8 @@ 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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} GRUB_PACKED;
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/*
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@@ -547,7 +562,7 @@ grub_ieee1275_ibm_cas (void)
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struct cas_vector vector =
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{
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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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@@ -558,6 +573,10 @@ 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, 192, 0, 128, 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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