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Colin Percival d1ca8cc638 x86: Add MPTABLE_LINUX_BUG_COMPAT option 
Linux has two bugs in its handling of the x86 MP table:
1. It assumes that there is always 640 kB of base memory, and looks for
the MP table in the top kB of this even if the memory map indicates
that memory location does not exist.
2. It ignores that entry_count field and instead iterates through the
MP table by scanning until it runs out of bytes in the table.

The Firecracker VM (and probably other related VMs) relies on both of
these bugs.  With the MPTABLE_LINUX_BUG_COMPAT option, we search for
the MP table at address 639k even if that isn't in the memory map; and
replace a zeroed entry_count with a value computed from scanning the
table until we run out of table bytes.

Reviewed by:	imp
Sponsored by:	https://www.patreon.com/cperciva
Differential Revision:	https://reviews.freebsd.org/D35799
2022-10-17 23:02:22 -07:00
..
config.mk config.mk: Add opt_platform.h support 2022-04-05 13:52:55 -06:00
dtb.build.mk Switch to the new device-tree vendor tree 2021-01-15 20:08:39 +01:00
dtb.mk Allow kernel config to specify DTS/DTSO to build, and out-of-tree support 2019-03-26 02:45:23 +00:00
files virtio_mmio: Support command-line parameters 2022-10-17 23:02:21 -07:00
files.amd64 zfs: fix static module build broken in 1f1e2261e 2022-06-23 19:44:38 +02:00
files.arm arm: add dwc3/xhci as build options for ARM 2022-09-11 19:36:42 -07:00
files.arm64 Add initial DPAA2 support 2022-10-14 22:49:09 +02:00
files.i386 ce: Disable -Wunused-but-set-variable for obfuscated tau32-ddk.c. 2022-04-08 17:25:13 -07:00
files.powerpc Import an optimized str{n}cmp on arm64 2022-09-08 14:23:20 +01:00
files.riscv Import an optimized str{n}cmp on arm64 2022-09-08 14:23:20 +01:00
files.x86 Import an optimized str{n}cmp on arm64 2022-09-08 14:23:20 +01:00
kern.mk Suppress -Wstrict-prototypes for several zlib files 2022-07-26 21:25:08 +02:00
kern.opts.mk cddl/*: add a WITH(OUT)_DTRACE option 2022-07-06 14:03:48 +01:00
kern.post.mk amd64: symlink i386 includes into build dir 2022-06-13 18:35:38 +01:00
kern.pre.mk LinuxKPI: add the "dummy" includes directory to builds 2022-09-26 19:36:44 +00:00
kmod.mk LinuxKPI: add the "dummy" includes directory to builds 2022-09-26 19:36:44 +00:00
kmod.opts.mk Add a kmod.opts.mk. 2019-11-21 18:14:26 +00:00
kmod_syms.awk kmod_syms.awk: fix removal of the export list from the symbol table 2021-11-18 15:56:24 +02:00
kmod_syms_prefix.awk Add the infrastructure to support loading multiple versions of TCP 2017-06-08 20:41:28 +00:00
ldscript.amd64 amd64: do not assume that kernel is loaded at 2M physical 2021-07-31 16:53:42 +03:00
ldscript.arm Eliminate the generated ldscript for arm and arm64, and strip $a/$d marker 2019-12-29 18:17:12 +00:00
ldscript.arm64 arm64: add read_frequently, read_mostluy and exclusive_cache_line to linker script 2021-08-23 15:22:17 +02:00
ldscript.i386 Expose the kernel's build-ID through sysctl 2019-06-04 13:07:10 +00:00
ldscript.kmod.amd64 Move PLTs to the beginning of amd64 kernel modules. 2020-09-16 13:51:47 +00:00
ldscript.kmod.i386 Formalize the use of linker scripts for kernel modules. 2019-10-16 22:19:56 +00:00
ldscript.powerpc [PowerPC] kernel ifunc support for powerpc*, fix ppc64 relocation oddities. 2020-05-07 19:32:49 +00:00
ldscript.powerpc64 [PowerPC] Fix build-id note on powerpc64 kernel 2020-06-01 19:40:59 +00:00
ldscript.powerpc64le [PowerPC64LE] Set up powerpc.powerpc64le architecture 2020-09-22 23:49:30 +00:00
ldscript.powerpcspe [PowerPC] kernel ifunc support for powerpc*, fix ppc64 relocation oddities. 2020-05-07 19:32:49 +00:00
ldscript.riscv Set the LMA of the riscv kernel to the OpenSBI jump target by default 2020-02-04 00:06:16 +00:00
Makefile.amd64 Don't try ctfconvert on file without debug info. 2020-04-28 16:09:25 +00:00
Makefile.arm ipq4018: add TCSR definitions from Linux. 2021-10-18 19:18:01 +00:00
Makefile.arm64 arm64: Don't rely on host readelf for u-boot booti image generation 2021-12-24 19:25:20 +00:00
Makefile.i386 Retire CLANG_NO_IAS34 2018-11-01 23:11:47 +00:00
Makefile.powerpc Stop adding -Wredundant-decls to CWARNFLAGS. 2022-02-07 12:47:51 -08:00
Makefile.riscv riscv: Add the device-tree path to the include path 2021-01-16 11:31:17 +01:00
newvers.sh newvers.sh: Don't use return to exit. 2022-06-14 10:51:39 -07:00
NOTES tcp: make CUBIC the default congestion control mechanism. 2022-09-13 12:09:21 +02:00
options mac: add new mac_ddb(4) policy 2022-07-18 22:06:15 +00:00
options.amd64 x86: Add MPTABLE_LINUX_BUG_COMPAT option 2022-10-17 23:02:22 -07:00
options.arm arm: allow the debug stuff in CP14 to be disabled at compile time 2021-10-18 19:18:56 +00:00
options.arm64 Per-thread stack canary on arm64 2021-11-26 14:44:00 +00:00
options.i386 x86: Add MPTABLE_LINUX_BUG_COMPAT option 2022-10-17 23:02:22 -07:00
options.powerpc powerpc/pseries: Allow radix pmap in pseries for ISA 3.0 2021-08-11 19:07:04 -05:00
options.riscv o Add driver for PLIC (Platform-Level Interrupt Controller) device. 2018-06-12 17:45:15 +00:00
std.nodebug Exclude DEBUG_VFS_LOCKS from non-debug kernel configs 2022-02-02 19:27:32 +02:00
sysent.mk sysent: regenerate files every time 2021-12-16 20:56:28 -06:00
systags.sh Fix kernel-tags target. 2020-01-23 13:56:12 +00:00
vdso_amd64.ldscript vdso linker scripts: explicitly specify output arch and target 2022-02-12 00:32:23 +02:00
vdso_amd64_ia32.ldscript vdso linker scripts: explicitly specify output arch and target 2022-02-12 00:32:23 +02:00
WITHOUT_SOURCELESS
WITHOUT_SOURCELESS_HOST
WITHOUT_SOURCELESS_UCODE retire cx,ctau drivers 2020-03-20 16:50:19 +00:00