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hw/riscv/virt-acpi-build.c: Add CMO information in RHCT

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When CMO related extensions like Zicboz, Zicbom and Zicbop are enabled, the
block size for those extensions need to be communicated via CMO node in
RHCT. Add CMO node in RHCT if any of those CMO extensions are detected.

Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20231218150247.466427-9-sunilvl@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Sunil V L 2023-12-18 20:32:42 +05:30 committed by Alistair Francis
parent 7d189186f6
commit e810a5177c
1 changed files with 56 additions and 8 deletions
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64
hw/riscv/virt-acpi-build.c
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@ -140,6 +140,7 @@ static void acpi_dsdt_add_cpus(Aml *scope, RISCVVirtState *s)
* 5.2.36 RISC-V Hart Capabilities Table (RHCT)
* REF: https://github.com/riscv-non-isa/riscv-acpi/issues/16
* https://drive.google.com/file/d/1nP3nFiH4jkPMp6COOxP6123DCZKR-tia/view
* https://drive.google.com/file/d/1sKbOa8m1UZw1JkquZYe3F1zQBN1xXsaf/view
*/
static void build_rhct(GArray *table_data,
BIOSLinker *linker,
@ -149,8 +150,8 @@ static void build_rhct(GArray *table_data,
MachineState *ms = MACHINE(s);
const CPUArchIdList *arch_ids = mc->possible_cpu_arch_ids(ms);
size_t len, aligned_len;
uint32_t isa_offset, num_rhct_nodes;
RISCVCPU *cpu;
uint32_t isa_offset, num_rhct_nodes, cmo_offset = 0;
RISCVCPU *cpu = &s->soc[0].harts[0];
char *isa;
AcpiTable table = { .sig = "RHCT", .rev = 1, .oem_id = s->oem_id,
@ -166,6 +167,9 @@ static void build_rhct(GArray *table_data,
/* ISA + N hart info */
num_rhct_nodes = 1 + ms->smp.cpus;
if (cpu->cfg.ext_zicbom || cpu->cfg.ext_zicboz) {
num_rhct_nodes++;
}
/* Number of RHCT nodes*/
build_append_int_noprefix(table_data, num_rhct_nodes, 4);
@ -177,7 +181,6 @@ static void build_rhct(GArray *table_data,
isa_offset = table_data->len - table.table_offset;
build_append_int_noprefix(table_data, 0, 2); /* Type 0 */
cpu = &s->soc[0].harts[0];
isa = riscv_isa_string(cpu);
len = 8 + strlen(isa) + 1;
aligned_len = (len % 2) ? (len + 1) : len;
@ -193,14 +196,59 @@ static void build_rhct(GArray *table_data,
build_append_int_noprefix(table_data, 0x0, 1); /* Optional Padding */
}
/* CMO node */
if (cpu->cfg.ext_zicbom || cpu->cfg.ext_zicboz) {
cmo_offset = table_data->len - table.table_offset;
build_append_int_noprefix(table_data, 1, 2); /* Type */
build_append_int_noprefix(table_data, 10, 2); /* Length */
build_append_int_noprefix(table_data, 0x1, 2); /* Revision */
build_append_int_noprefix(table_data, 0, 1); /* Reserved */
/* CBOM block size */
if (cpu->cfg.cbom_blocksize) {
build_append_int_noprefix(table_data,
__builtin_ctz(cpu->cfg.cbom_blocksize),
1);
} else {
build_append_int_noprefix(table_data, 0, 1);
}
/* CBOP block size */
build_append_int_noprefix(table_data, 0, 1);
/* CBOZ block size */
if (cpu->cfg.cboz_blocksize) {
build_append_int_noprefix(table_data,
__builtin_ctz(cpu->cfg.cboz_blocksize),
1);
} else {
build_append_int_noprefix(table_data, 0, 1);
}
}
/* Hart Info Node */
for (int i = 0; i < arch_ids->len; i++) {
len = 16;
int num_offsets = 1;
build_append_int_noprefix(table_data, 0xFFFF, 2); /* Type */
build_append_int_noprefix(table_data, 16, 2); /* Length */
build_append_int_noprefix(table_data, 0x1, 2); /* Revision */
build_append_int_noprefix(table_data, 1, 2); /* Number of offsets */
build_append_int_noprefix(table_data, i, 4); /* ACPI Processor UID */
build_append_int_noprefix(table_data, isa_offset, 4); /* Offsets[0] */
/* Length */
if (cmo_offset) {
len += 4;
num_offsets++;
}
build_append_int_noprefix(table_data, len, 2);
build_append_int_noprefix(table_data, 0x1, 2); /* Revision */
/* Number of offsets */
build_append_int_noprefix(table_data, num_offsets, 2);
build_append_int_noprefix(table_data, i, 4); /* ACPI Processor UID */
/* Offsets */
build_append_int_noprefix(table_data, isa_offset, 4);
if (cmo_offset) {
build_append_int_noprefix(table_data, cmo_offset, 4);
}
}
acpi_table_end(linker, &table);