[PATCH v3 33/44] x86: emulation: Support BLOBLIST_TABLES properly
Simon Glass
sjg at chromium.org
Tue Feb 25 00:06:22 CET 2025
The existing QEMU implementation mostly ignored BLOBLIST_TABLES and
allocates the bulk of the tables with malloc(). Update it to place all
tables in the bloblist. Since QEMU declares a size of 128KB regardless
of the size of its tables, this requires a larger bloblist.
Fix up the e820 table to handle this, keeping the old code as an option
for now, to assist with any future bug-fixing.
Signed-off-by: Simon Glass <sjg at chromium.org>
---
Changes in v3:
- Add new patch to support BLOBLIST_TABLES properly in QEMU
arch/x86/cpu/qemu/e820.c | 18 +++++++++++++-----
arch/x86/lib/tables.c | 9 ++++++++-
configs/qemu-x86_64_defconfig | 2 +-
configs/qemu-x86_defconfig | 2 +-
drivers/misc/qfw_acpi.c | 32 +++++++++++++++++++++++++++-----
5 files changed, 50 insertions(+), 13 deletions(-)
diff --git a/arch/x86/cpu/qemu/e820.c b/arch/x86/cpu/qemu/e820.c
index 2b0ad179489..078d1d86b02 100644
--- a/arch/x86/cpu/qemu/e820.c
+++ b/arch/x86/cpu/qemu/e820.c
@@ -6,6 +6,7 @@
* (C) Copyright 2019 Bin Meng <bmeng.cn at gmail.com>
*/
+#include <bloblist.h>
#include <env_internal.h>
#include <malloc.h>
#include <asm/e820.h>
@@ -27,12 +28,19 @@ unsigned int install_e820_map(unsigned int max_entries,
e820_next(&ctx, E820_RESERVED, ISA_END_ADDRESS);
/*
- * since we use memalign(malloc) to allocate high memory for
- * storing ACPI tables, we need to reserve them in e820 tables,
- * otherwise kernel will reclaim them and data will be corrupted
+ * if we use bloblist to allocate high memory for storing ACPI tables,
+ * we need to reserve that region in e820 tables, otherwise the kernel
+ * will reclaim them and data will be corrupted. The ACPI tables may not
+ * have been written yet, so use the whole bloblist size
*/
- e820_to_addr(&ctx, E820_RAM, gd->relocaddr - TOTAL_MALLOC_LEN);
- e820_next(&ctx, E820_RESERVED, TOTAL_MALLOC_LEN);
+ if (IS_ENABLED(CONFIG_BLOBLIST_TABLES)) {
+ e820_to_addr(&ctx, E820_RAM, (ulong)gd->bloblist);
+ e820_next(&ctx, E820_ACPI, bloblist_get_total_size());
+ } else {
+ /* If using memalign() reserve that whole region instead */
+ e820_to_addr(&ctx, E820_RAM, gd->relocaddr - TOTAL_MALLOC_LEN);
+ e820_next(&ctx, E820_ACPI, TOTAL_MALLOC_LEN);
+ }
e820_to_addr(&ctx, E820_RAM, qemu_get_low_memory_size());
e820_add(&ctx, E820_RESERVED, CONFIG_PCIE_ECAM_BASE,
CONFIG_PCIE_ECAM_SIZE);
diff --git a/arch/x86/lib/tables.c b/arch/x86/lib/tables.c
index 44fe80c5224..ec52992209f 100644
--- a/arch/x86/lib/tables.c
+++ b/arch/x86/lib/tables.c
@@ -45,6 +45,13 @@ struct table_info {
int align;
};
+/* QEMU's tables include quite a bit of empty space */
+#ifdef CONFIG_QEMU
+#define ACPI_SIZE (192 << 10)
+#else
+#define ACPI_SIZE SZ_64K
+#endif
+
static struct table_info table_list[] = {
#ifdef CONFIG_GENERATE_PIRQ_TABLE
{ "pirq", write_pirq_routing_table },
@@ -60,7 +67,7 @@ static struct table_info table_list[] = {
* that the calculation of gd->table_end works properly
*/
#ifdef CONFIG_GENERATE_ACPI_TABLE
- { "acpi", write_acpi_tables, BLOBLISTT_ACPI_TABLES, SZ_64K, SZ_4K},
+ { "acpi", write_acpi_tables, BLOBLISTT_ACPI_TABLES, ACPI_SIZE, SZ_4K},
#endif
#ifdef CONFIG_GENERATE_SMBIOS_TABLE
/*
diff --git a/configs/qemu-x86_64_defconfig b/configs/qemu-x86_64_defconfig
index ae34cc2a6f8..58b1fbf132d 100644
--- a/configs/qemu-x86_64_defconfig
+++ b/configs/qemu-x86_64_defconfig
@@ -1,7 +1,7 @@
CONFIG_X86=y
CONFIG_TEXT_BASE=0x1110000
CONFIG_SYS_MALLOC_F_LEN=0x1800
-CONFIG_BLOBLIST_SIZE_RELOC=0x20000
+CONFIG_BLOBLIST_SIZE_RELOC=0x40000
CONFIG_NR_DRAM_BANKS=8
CONFIG_ENV_SIZE=0x40000
CONFIG_MAX_CPUS=2
diff --git a/configs/qemu-x86_defconfig b/configs/qemu-x86_defconfig
index 7afa3827e61..099d3f32d1b 100644
--- a/configs/qemu-x86_defconfig
+++ b/configs/qemu-x86_defconfig
@@ -1,7 +1,7 @@
CONFIG_X86=y
CONFIG_TEXT_BASE=0xFFF00000
CONFIG_SYS_MALLOC_F_LEN=0x1000
-CONFIG_BLOBLIST_SIZE_RELOC=0x20000
+CONFIG_BLOBLIST_SIZE_RELOC=0x40000
CONFIG_NR_DRAM_BANKS=8
CONFIG_ENV_SIZE=0x40000
CONFIG_MAX_CPUS=2
diff --git a/drivers/misc/qfw_acpi.c b/drivers/misc/qfw_acpi.c
index 0d0cf764689..ec00ba65ade 100644
--- a/drivers/misc/qfw_acpi.c
+++ b/drivers/misc/qfw_acpi.c
@@ -25,17 +25,18 @@ DECLARE_GLOBAL_DATA_PTR;
*
* @entry : BIOS linker command entry which tells where to allocate memory
* (either high memory or low memory)
- * @addr : The address that should be used for low memory allcation. If the
+ * @addr : The address that should be used for low memory allocation. If the
* memory allocation request is 'ZONE_HIGH' then this parameter will
* be ignored.
* @return: 0 on success, or negative value on failure
*/
-static int bios_linker_allocate(struct udevice *dev,
+static int bios_linker_allocate(struct acpi_ctx *ctx, struct udevice *dev,
struct bios_linker_entry *entry, ulong *addr)
{
uint32_t size, align;
struct fw_file *file;
unsigned long aligned_addr;
+ struct acpi_rsdp *rsdp;
align = le32_to_cpu(entry->alloc.align);
/* align must be power of 2 */
@@ -58,7 +59,9 @@ static int bios_linker_allocate(struct udevice *dev,
* If allocation zone is ZONE_FSEG, then we use the 'addr' passed
* in which is low memory
*/
- if (entry->alloc.zone == BIOS_LINKER_LOADER_ALLOC_ZONE_HIGH) {
+ if (IS_ENABLED(CONFIG_BLOBLIST_TABLES)) {
+ aligned_addr = ALIGN(*addr, align);
+ } else if (entry->alloc.zone == BIOS_LINKER_LOADER_ALLOC_ZONE_HIGH) {
aligned_addr = (unsigned long)memalign(align, size);
if (!aligned_addr) {
printf("error: allocating resource\n");
@@ -83,8 +86,13 @@ static int bios_linker_allocate(struct udevice *dev,
(void *)aligned_addr);
file->addr = aligned_addr;
+ rsdp = (void *)aligned_addr;
+ if (!strncmp(rsdp->signature, RSDP_SIG, sizeof(rsdp->signature)))
+ ctx->rsdp = rsdp;
+
/* adjust address for low memory allocation */
- if (entry->alloc.zone == BIOS_LINKER_LOADER_ALLOC_ZONE_FSEG)
+ if (IS_ENABLED(CONFIG_BLOBLIST_TABLES) ||
+ entry->alloc.zone == BIOS_LINKER_LOADER_ALLOC_ZONE_FSEG)
*addr = (aligned_addr + size);
return 0;
@@ -209,19 +217,23 @@ ulong write_acpi_tables(ulong addr)
qfw_read_entry(dev, be16_to_cpu(file->cfg.select), size, table_loader);
for (i = 0; i < (size / sizeof(*entry)); i++) {
+ log_content("entry %d: addr %lx\n", i, addr);
entry = table_loader + i;
switch (le32_to_cpu(entry->command)) {
case BIOS_LINKER_LOADER_COMMAND_ALLOCATE:
- ret = bios_linker_allocate(dev, entry, &addr);
+ log_content(" - %s\n", entry->alloc.file);
+ ret = bios_linker_allocate(ctx, dev, entry, &addr);
if (ret)
goto out;
break;
case BIOS_LINKER_LOADER_COMMAND_ADD_POINTER:
+ log_content(" - %s\n", entry->pointer.src_file);
ret = bios_linker_add_pointer(dev, entry);
if (ret)
goto out;
break;
case BIOS_LINKER_LOADER_COMMAND_ADD_CHECKSUM:
+ log_content(" - %s\n", entry->cksum.file);
ret = bios_linker_add_checksum(dev, entry);
if (ret)
goto out;
@@ -246,6 +258,16 @@ out:
free(table_loader);
+ if (!ctx->rsdp) {
+ printf("error: no RSDP found\n");
+ return addr;
+ }
+ struct acpi_rsdp *rsdp = ctx->rsdp;
+
+ rsdp->length = sizeof(*rsdp);
+ rsdp->xsdt_address = 0;
+ rsdp->ext_checksum = table_compute_checksum((u8 *)rsdp, sizeof(*rsdp));
+
gd_set_acpi_start(acpi_get_rsdp_addr());
return addr;
--
2.43.0
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