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Merge remote-tracking branch 'kraxel/e820.1' into staging

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# By Gerd Hoffmann
# Via Gerd Hoffmann
* kraxel/e820.1:
  pc: register e820 entries for ram
  pc: add etc/e820 fw_cfg file

Message-id: 1383567431-13540-1-git-send-email-kraxel@redhat.com
Signed-off-by: Anthony Liguori <aliguori@amazon.com>
This commit is contained in:
Anthony Liguori 2013-11-05 08:26:57 -08:00
commit 0d6e9a23ae
1 changed files with 29 additions and 18 deletions
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47
hw/i386/pc.c
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@ -90,7 +90,9 @@ struct e820_table {
struct e820_entry entry[E820_NR_ENTRIES];
} QEMU_PACKED __attribute((__aligned__(4)));
static struct e820_table e820_table;
static struct e820_table e820_reserve;
static struct e820_entry *e820_table;
static unsigned e820_entries;
struct hpet_fw_config hpet_cfg = {.count = UINT8_MAX};
void gsi_handler(void *opaque, int n, int level)
@ -577,19 +579,32 @@ static void handle_a20_line_change(void *opaque, int irq, int level)
int e820_add_entry(uint64_t address, uint64_t length, uint32_t type)
{
int index = le32_to_cpu(e820_table.count);
int index = le32_to_cpu(e820_reserve.count);
struct e820_entry *entry;
if (index >= E820_NR_ENTRIES)
return -EBUSY;
entry = &e820_table.entry[index++];
if (type != E820_RAM) {
/* old FW_CFG_E820_TABLE entry -- reservations only */
if (index >= E820_NR_ENTRIES) {
return -EBUSY;
}
entry = &e820_reserve.entry[index++];
entry->address = cpu_to_le64(address);
entry->length = cpu_to_le64(length);
entry->type = cpu_to_le32(type);
entry->address = cpu_to_le64(address);
entry->length = cpu_to_le64(length);
entry->type = cpu_to_le32(type);
e820_table.count = cpu_to_le32(index);
return index;
e820_reserve.count = cpu_to_le32(index);
}
/* new "etc/e820" file -- include ram too */
e820_table = g_realloc(e820_table,
sizeof(struct e820_entry) * (e820_entries+1));
e820_table[e820_entries].address = cpu_to_le64(address);
e820_table[e820_entries].length = cpu_to_le64(length);
e820_table[e820_entries].type = cpu_to_le32(type);
e820_entries++;
return e820_entries;
}
/* Calculates the limit to CPU APIC ID values
@ -640,7 +655,9 @@ static FWCfgState *bochs_bios_init(void)
fw_cfg_add_bytes(fw_cfg, FW_CFG_SMBIOS_ENTRIES,
smbios_table, smbios_len);
fw_cfg_add_bytes(fw_cfg, FW_CFG_E820_TABLE,
&e820_table, sizeof(e820_table));
&e820_reserve, sizeof(e820_reserve));
fw_cfg_add_file(fw_cfg, "etc/e820", e820_table,
sizeof(struct e820_entry) * e820_entries);
fw_cfg_add_bytes(fw_cfg, FW_CFG_HPET, &hpet_cfg, sizeof(hpet_cfg));
/* allocate memory for the NUMA channel: one (64bit) word for the number
@ -1157,13 +1174,7 @@ FWCfgState *pc_memory_init(MemoryRegion *system_memory,
memory_region_init_alias(ram_below_4g, NULL, "ram-below-4g", ram,
0, below_4g_mem_size);
memory_region_add_subregion(system_memory, 0, ram_below_4g);
if (0) {
/*
* Ideally we should do that too, but that would ruin the e820
* reservations added by seabios before initializing fw_cfg.
*/
e820_add_entry(0, below_4g_mem_size, E820_RAM);
}
e820_add_entry(0, below_4g_mem_size, E820_RAM);
if (above_4g_mem_size > 0) {
ram_above_4g = g_malloc(sizeof(*ram_above_4g));
memory_region_init_alias(ram_above_4g, NULL, "ram-above-4g", ram,