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[PULL v3 01/81] hw/i386/e820: remove legacy reserved entries for e820
From: |
Michael S. Tsirkin |
Subject: |
[PULL v3 01/81] hw/i386/e820: remove legacy reserved entries for e820 |
Date: |
Sat, 5 Nov 2022 13:15:25 -0400 |
From: Ani Sinha <ani@anisinha.ca>
e820 reserved entries were used before the dynamic entries with fw config files
were intoduced. Please see the following change:
7d67110f2d9a6("pc: add etc/e820 fw_cfg file")
Identical support was introduced into seabios as well with the following commit:
ce39bd4031820 ("Add support for etc/e820 fw_cfg file")
Both the above commits are now quite old. QEMU machines 1.7 and newer no longer
use the reserved entries. Seabios uses fw config files and
dynamic e820 entries by default and only falls back to using reserved entries
when it has to work with old qemu (versions earlier than 1.7). Please see
functions qemu_cfg_e820() and qemu_early_e820(). It is safe to remove legacy
FW_CFG_E820_TABLE and associated code now as QEMU 7.0 has deprecated i440fx
machines 1.7 and older. It would be incredibly rare to run the latest qemu
version with a very old version of seabios that did not support fw config files
for e820.
As far as I could see, edk2/ovfm never supported reserved entries and uses fw
config files from the beginning. So there should be no incompatibilities with
ovfm as well.
CC: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Ani Sinha <ani@anisinha.ca>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Message-Id: <20220831045311.33083-1-ani@anisinha.ca>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
hw/i386/e820_memory_layout.h | 8 --------
hw/i386/fw_cfg.h | 1 -
hw/i386/e820_memory_layout.c | 20 +-------------------
hw/i386/fw_cfg.c | 3 ---
hw/i386/microvm.c | 2 --
5 files changed, 1 insertion(+), 33 deletions(-)
diff --git a/hw/i386/e820_memory_layout.h b/hw/i386/e820_memory_layout.h
index 04f93780f9..7c239aa033 100644
--- a/hw/i386/e820_memory_layout.h
+++ b/hw/i386/e820_memory_layout.h
@@ -16,20 +16,12 @@
#define E820_NVS 4
#define E820_UNUSABLE 5
-#define E820_NR_ENTRIES 16
-
struct e820_entry {
uint64_t address;
uint64_t length;
uint32_t type;
} QEMU_PACKED __attribute((__aligned__(4)));
-struct e820_table {
- uint32_t count;
- struct e820_entry entry[E820_NR_ENTRIES];
-} QEMU_PACKED __attribute((__aligned__(4)));
-
-extern struct e820_table e820_reserve;
extern struct e820_entry *e820_table;
int e820_add_entry(uint64_t address, uint64_t length, uint32_t type);
diff --git a/hw/i386/fw_cfg.h b/hw/i386/fw_cfg.h
index 275f15c1c5..86ca7c1c0c 100644
--- a/hw/i386/fw_cfg.h
+++ b/hw/i386/fw_cfg.h
@@ -17,7 +17,6 @@
#define FW_CFG_ACPI_TABLES (FW_CFG_ARCH_LOCAL + 0)
#define FW_CFG_SMBIOS_ENTRIES (FW_CFG_ARCH_LOCAL + 1)
#define FW_CFG_IRQ0_OVERRIDE (FW_CFG_ARCH_LOCAL + 2)
-#define FW_CFG_E820_TABLE (FW_CFG_ARCH_LOCAL + 3)
#define FW_CFG_HPET (FW_CFG_ARCH_LOCAL + 4)
FWCfgState *fw_cfg_arch_create(MachineState *ms,
diff --git a/hw/i386/e820_memory_layout.c b/hw/i386/e820_memory_layout.c
index bcf9eaf837..06970ac44a 100644
--- a/hw/i386/e820_memory_layout.c
+++ b/hw/i386/e820_memory_layout.c
@@ -11,29 +11,11 @@
#include "e820_memory_layout.h"
static size_t e820_entries;
-struct e820_table e820_reserve;
struct e820_entry *e820_table;
int e820_add_entry(uint64_t address, uint64_t length, uint32_t type)
{
- int index = le32_to_cpu(e820_reserve.count);
- struct e820_entry *entry;
-
- 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);
-
- e820_reserve.count = cpu_to_le32(index);
- }
-
- /* new "etc/e820" file -- include ram too */
+ /* new "etc/e820" file -- include ram and reserved entries */
e820_table = g_renew(struct e820_entry, e820_table, e820_entries + 1);
e820_table[e820_entries].address = cpu_to_le64(address);
e820_table[e820_entries].length = cpu_to_le64(length);
diff --git a/hw/i386/fw_cfg.c b/hw/i386/fw_cfg.c
index a283785a8d..72a42f3c66 100644
--- a/hw/i386/fw_cfg.c
+++ b/hw/i386/fw_cfg.c
@@ -36,7 +36,6 @@ const char *fw_cfg_arch_key_name(uint16_t key)
{FW_CFG_ACPI_TABLES, "acpi_tables"},
{FW_CFG_SMBIOS_ENTRIES, "smbios_entries"},
{FW_CFG_IRQ0_OVERRIDE, "irq0_override"},
- {FW_CFG_E820_TABLE, "e820_table"},
{FW_CFG_HPET, "hpet"},
};
@@ -127,8 +126,6 @@ FWCfgState *fw_cfg_arch_create(MachineState *ms,
#endif
fw_cfg_add_i32(fw_cfg, FW_CFG_IRQ0_OVERRIDE, 1);
- fw_cfg_add_bytes(fw_cfg, FW_CFG_E820_TABLE,
- &e820_reserve, sizeof(e820_reserve));
fw_cfg_add_file(fw_cfg, "etc/e820", e820_table,
sizeof(struct e820_entry) * e820_get_num_entries());
diff --git a/hw/i386/microvm.c b/hw/i386/microvm.c
index ffd1884100..170a331e3f 100644
--- a/hw/i386/microvm.c
+++ b/hw/i386/microvm.c
@@ -324,8 +324,6 @@ static void microvm_memory_init(MicrovmMachineState *mms)
fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, machine->smp.max_cpus);
fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)machine->ram_size);
fw_cfg_add_i32(fw_cfg, FW_CFG_IRQ0_OVERRIDE, 1);
- fw_cfg_add_bytes(fw_cfg, FW_CFG_E820_TABLE,
- &e820_reserve, sizeof(e820_reserve));
fw_cfg_add_file(fw_cfg, "etc/e820", e820_table,
sizeof(struct e820_entry) * e820_get_num_entries());
--
MST
- [PULL v3 00/81] pci,pc,virtio: features, tests, fixes, cleanups, Michael S. Tsirkin, 2022/11/05
- [PULL v3 06/81] test/acpi/bios-tables-test: SSDT: update golden master binaries, Michael S. Tsirkin, 2022/11/05
- [PULL v3 04/81] acpi/nvdimm: define macro for NVDIMM Device _DSM, Michael S. Tsirkin, 2022/11/05
- [PULL v3 02/81] tests/acpi: allow SSDT changes, Michael S. Tsirkin, 2022/11/05
- [PULL v3 05/81] acpi/nvdimm: Implement ACPI NVDIMM Label Methods, Michael S. Tsirkin, 2022/11/05
- [PULL v3 01/81] hw/i386/e820: remove legacy reserved entries for e820,
Michael S. Tsirkin <=
- [PULL v3 07/81] virtio-crypto: Support asynchronous mode, Michael S. Tsirkin, 2022/11/05
- [PULL v3 10/81] cryptodev: Add a lkcf-backend for cryptodev, Michael S. Tsirkin, 2022/11/05
- [PULL v3 03/81] acpi/ssdt: Fix aml_or() and aml_and() in if clause, Michael S. Tsirkin, 2022/11/05
- [PULL v3 09/81] crypto: Support export akcipher to pkcs8, Michael S. Tsirkin, 2022/11/05
- [PULL v3 08/81] crypto: Support DER encodings, Michael S. Tsirkin, 2022/11/05
- [PULL v3 12/81] acpi/tests/avocado/bits: disable acpi PSS tests that are failing in biosbits, Michael S. Tsirkin, 2022/11/05
- [PULL v3 11/81] acpi/tests/avocado/bits: initial commit of test scripts that are run by biosbits, Michael S. Tsirkin, 2022/11/05
- [PULL v3 13/81] acpi/tests/avocado/bits: add biosbits config file for running bios tests, Michael S. Tsirkin, 2022/11/05
- [PULL v3 20/81] bios-tables-test: add test for number of cores > 255, Michael S. Tsirkin, 2022/11/05
- [PULL v3 26/81] hw/pci: PCIe Data Object Exchange emulation, Michael S. Tsirkin, 2022/11/05