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112 lines
3.5 KiB
112 lines
3.5 KiB
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Daniel Axtens <dja@axtens.net>
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Date: Fri, 8 Apr 2022 12:35:28 +1000
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Subject: [PATCH] powerpc: do CAS in a more compatible way
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I wrongly assumed that the most compatible way to perform CAS
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negotiation was to only set the minimum number of vectors required
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to ask for more memory. It turns out that this messes up booting
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if the minimum VP capacity would be less than the default 10% in
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vector 4.
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Linux configures the minimum capacity to be 1%, so copy it for that
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and for vector 3 which we now need to specify as well.
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Signed-off-by: Daniel Axtens <dja@axtens.net>
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(cherry picked from commit e6f02ad4e75cd995a8ee2954d28949c415b6cbfe)
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---
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grub-core/kern/ieee1275/init.c | 54 ++++++++++++++++++++++++------------------
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1 file changed, 31 insertions(+), 23 deletions(-)
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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 9704715c83..ef55107467 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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@@ -298,33 +298,37 @@ grub_ieee1275_total_mem (grub_uint64_t *total)
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/* Based on linux - arch/powerpc/kernel/prom_init.c */
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struct option_vector2 {
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- grub_uint8_t byte1;
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- grub_uint16_t reserved;
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- grub_uint32_t real_base;
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- grub_uint32_t real_size;
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- grub_uint32_t virt_base;
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- grub_uint32_t virt_size;
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- grub_uint32_t load_base;
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- grub_uint32_t min_rma;
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- grub_uint32_t min_load;
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- grub_uint8_t min_rma_percent;
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- grub_uint8_t max_pft_size;
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+ grub_uint8_t byte1;
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+ grub_uint16_t reserved;
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+ grub_uint32_t real_base;
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+ grub_uint32_t real_size;
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+ grub_uint32_t virt_base;
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+ grub_uint32_t virt_size;
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+ grub_uint32_t load_base;
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+ grub_uint32_t min_rma;
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+ grub_uint32_t min_load;
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+ grub_uint8_t min_rma_percent;
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+ grub_uint8_t max_pft_size;
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} __attribute__((packed));
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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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+ grub_uint32_t mask;
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+ grub_uint32_t entry;
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};
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struct cas_vector {
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- struct {
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- struct pvr_entry terminal;
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- } pvr_list;
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- grub_uint8_t num_vecs;
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- grub_uint8_t vec1_size;
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- grub_uint8_t vec1;
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- grub_uint8_t vec2_size;
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- struct option_vector2 vec2;
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+ struct {
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+ struct pvr_entry terminal;
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+ } pvr_list;
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+ grub_uint8_t num_vecs;
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+ grub_uint8_t vec1_size;
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+ grub_uint8_t vec1;
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+ grub_uint8_t vec2_size;
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+ struct option_vector2 vec2;
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+ grub_uint8_t vec3_size;
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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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} __attribute__((packed));
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/* Call ibm,client-architecture-support to try to get more RMA.
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@@ -345,13 +349,17 @@ 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 = 2 - 1,
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+ .num_vecs = 4 - 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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.vec2 = {
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0, 0, -1, -1, -1, -1, -1, 512, -1, 0, 48
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},
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+ .vec3_size = 2 - 1,
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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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};
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INIT_IEEE1275_COMMON (&args.common, "call-method", 3, 2);
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@@ -364,7 +372,7 @@ grub_ieee1275_ibm_cas (void)
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args.ihandle = root;
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args.cas_addr = (grub_ieee1275_cell_t)&vector;
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- grub_printf("Calling ibm,client-architecture-support...");
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+ grub_printf("Calling ibm,client-architecture-support from grub...");
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IEEE1275_CALL_ENTRY_FN (&args);
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grub_printf("done\n");
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