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Kernel: Ignore an invalid QEMU multiboot entry

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This was introduced in the QEMU commit 8504f12 and was causing the
kernel to fail to boot on the q35 machine.

Fixes #14952.
This commit is contained in:
implicitfield 2022-12-06 23:47:45 +02:00 committed by Linus Groh
parent 733a318709
commit 9665f41979
Notes: sideshowbarker 2024-07-17 03:12:16 +09:00 
Author: https://github.com/implicitfield
Commit: https://github.com/SerenityOS/serenity/commit/9665f41979
Pull-request: https://github.com/SerenityOS/serenity/pull/16345
Issue: https://github.com/SerenityOS/serenity/issues/14952
Reviewed-by: https://github.com/linusg
2 changed files with 12 additions and 7 deletions
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13
Kernel/Memory/MemoryManager.cpp
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@ -291,7 +291,18 @@ UNMAP_AFTER_INIT void MemoryManager::parse_memory_map()
global_data.physical_memory_ranges.append(PhysicalMemoryRange { PhysicalMemoryRangeType::Usable, start_address, length });
break;
case (MULTIBOOT_MEMORY_RESERVED):
global_data.physical_memory_ranges.append(PhysicalMemoryRange { PhysicalMemoryRangeType::Reserved, start_address, length });
#if ARCH(I386) || ARCH(X86_64)
// Workaround for https://gitlab.com/qemu-project/qemu/-/commit/8504f129450b909c88e199ca44facd35d38ba4de
// That commit added a reserved 12GiB entry for the benefit of virtual firmware.
// We can safely ignore this block as it isn't actually reserved on any real hardware.
// From: https://lore.kernel.org/all/20220701161014.3850-1-joao.m.martins@oracle.com/
// "Always add the HyperTransport range into e820 even when the relocation isn't
// done *and* there's >= 40 phys bit that would put max phyusical boundary to 1T
// This should allow virtual firmware to avoid the reserved range at the
// 1T boundary on VFs with big bars."
if (address != 0x000000fd00000000 || length != (0x000000ffffffffff - 0x000000fd00000000) + 1)
#endif
global_data.physical_memory_ranges.append(PhysicalMemoryRange { PhysicalMemoryRangeType::Reserved, start_address, length });
break;
case (MULTIBOOT_MEMORY_ACPI_RECLAIMABLE):
global_data.physical_memory_ranges.append(PhysicalMemoryRange { PhysicalMemoryRangeType::ACPI_Reclaimable, start_address, length });

6
Meta/run.sh
View File

@ -121,11 +121,6 @@ if [ "$installed_major_version" -lt "$SERENITY_QEMU_MIN_REQ_MAJOR_VERSION" ] ||
die
fi
# https://github.com/SerenityOS/serenity/issues/14952
if [ "$installed_major_version" -ge 7 ] && [ "$installed_minor_version" -gt 0 ]; then
SERENITY_MACHINE_FORCE_VERSION_SEVEN_ZERO="-machine pc-i440fx-7.0"
fi
NATIVE_WINDOWS_QEMU="0"
if command -v wslpath >/dev/null; then
@ -267,7 +262,6 @@ if [ -z "$SERENITY_MACHINE" ]; then
SERENITY_MACHINE="-M raspi3b -serial stdio"
else
SERENITY_MACHINE="
$SERENITY_MACHINE_FORCE_VERSION_SEVEN_ZERO
-m $SERENITY_RAM_SIZE
-smp $SERENITY_CPUS
-display $SERENITY_QEMU_DISPLAY_BACKEND