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b29f377119
- Continuing work by Ard Biesheuvel to improve the x86 early startup code, with the long-term goal to make it position independent: - Get rid of early accesses to global objects, either by moving them to the stack, deferring the access until later, or dropping the globals entirely. - Move all code that runs early via the 1:1 mapping into .head.text, and move code that does not out of it, so that build time checks can be added later to ensure that no inadvertent absolute references were emitted into code that does not tolerate them. - Remove fixup_pointer() and occurrences of __pa_symbol(), which rely on the compiler emitting absolute references, which is not guaranteed. - Improve the early console code. - Add early console message about ignored NMIs, so that users are at least warned about their existence - even if we cannot do anything about them. - Improve the kexec code's kernel load address handling. - Enable more X86S (simplified x86) bits. - Simplify early boot GDT handling - Micro-optimize the boot code a bit - Misc cleanups. Signed-off-by: Ingo Molnar <mingo@kernel.org> -----BEGIN PGP SIGNATURE----- iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmXwIg8RHG1pbmdvQGtl cm5lbC5vcmcACgkQEnMQ0APhK1jVHg//bzqXyzhoppEP4QMPVEHQdhy3UN33djwF HsjNgw/V1P5O5CPvQehCOgrJOcQ8LLPSA68ugG7FY9mzBjvnGnINXzWzukaaQGTh EXIwz/uw2++m3JMDt2PAzfeNZ8LlHb8V2xgexfkBFE7O3BX6ThIg9BKaFH1n7XOY AQXRRxlB5YThS3Rcqqeo/jN9bQZn7crqeWVS5Dk0bL1f53Y8SJjKIA4mHUb4xjbo LX0Z61G9Qz5e26U1U89tloW82zmiD/pvvuIQUnVVtPVMhSoFKhrxYI9MTPLjj0vt p+5UwMutFdJyjbTIsito7YSE6OG6RA2d1uoQjTQCx0sr6NtABbDE5QrciQTfHRGa 1TyScbineiCf3GtQMuDRAKTbaUzWlUzmk9SrpUxK8UR+R6xVvA4GElUUvGe0/dKh QnYD+i6wr71S80t3gHqbBGcs4xjUS5rmpTXJ86VPp9hHB+l/2tvBnNro1JNxM/Ei wchQLHbaeWwztnceaGOWlsfAln0prtIYvVOUeTbn6rUFTjgSE2kS2h6GD3h3ZVnM az5G+bhjWm6eDL6QoBN6XsZ1UF0O7hcjOa2UpS8N1ek0b4E/LVwtMnmpexM09ehE FoBAsxYy5SuGCYab636rMmAmHwRjDozwNNJG+6RrrAYwqoQDqKiSnIismJwcOEKD 6UzK/KBwxuI= =zvw3 -----END PGP SIGNATURE----- Merge tag 'x86-boot-2024-03-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 boot updates from Ingo Molnar: - Continuing work by Ard Biesheuvel to improve the x86 early startup code, with the long-term goal to make it position independent: - Get rid of early accesses to global objects, either by moving them to the stack, deferring the access until later, or dropping the globals entirely - Move all code that runs early via the 1:1 mapping into .head.text, and move code that does not out of it, so that build time checks can be added later to ensure that no inadvertent absolute references were emitted into code that does not tolerate them - Remove fixup_pointer() and occurrences of __pa_symbol(), which rely on the compiler emitting absolute references, which is not guaranteed - Improve the early console code - Add early console message about ignored NMIs, so that users are at least warned about their existence - even if we cannot do anything about them - Improve the kexec code's kernel load address handling - Enable more X86S (simplified x86) bits - Simplify early boot GDT handling - Micro-optimize the boot code a bit - Misc cleanups * tag 'x86-boot-2024-03-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits) x86/sev: Move early startup code into .head.text section x86/sme: Move early SME kernel encryption handling into .head.text x86/boot: Move mem_encrypt= parsing to the decompressor efi/libstub: Add generic support for parsing mem_encrypt= x86/startup_64: Simplify virtual switch on primary boot x86/startup_64: Simplify calculation of initial page table address x86/startup_64: Defer assignment of 5-level paging global variables x86/startup_64: Simplify CR4 handling in startup code x86/boot: Use 32-bit XOR to clear registers efi/x86: Set the PE/COFF header's NX compat flag unconditionally x86/boot/64: Load the final kernel GDT during early boot directly, remove startup_gdt[] x86/boot/64: Use RIP_REL_REF() to access early_top_pgt[] x86/boot/64: Use RIP_REL_REF() to access early page tables x86/boot/64: Use RIP_REL_REF() to access '__supported_pte_mask' x86/boot/64: Use RIP_REL_REF() to access early_dynamic_pgts[] x86/boot/64: Use RIP_REL_REF() to assign 'phys_base' x86/boot/64: Simplify global variable accesses in GDT/IDT programming x86/trampoline: Bypass compat mode in trampoline_start64() if not needed kexec: Allocate kernel above bzImage's pref_address x86/boot: Add a message about ignored early NMIs ... |
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ABI | ||
accel | ||
accounting | ||
admin-guide | ||
arch | ||
block | ||
bpf | ||
cdrom | ||
core-api | ||
cpu-freq | ||
crypto | ||
dev-tools | ||
devicetree | ||
doc-guide | ||
driver-api | ||
fault-injection | ||
fb | ||
features | ||
filesystems | ||
firmware_class | ||
firmware-guide | ||
fpga | ||
gpu | ||
hid | ||
hwmon | ||
i2c | ||
iio | ||
images | ||
infiniband | ||
input | ||
isdn | ||
kbuild | ||
kernel-hacking | ||
leds | ||
litmus-tests | ||
livepatch | ||
locking | ||
maintainer | ||
mhi | ||
misc-devices | ||
mm | ||
netlabel | ||
netlink | ||
networking | ||
nvdimm | ||
nvme | ||
PCI | ||
pcmcia | ||
peci | ||
power | ||
process | ||
RCU | ||
rust | ||
scheduler | ||
scsi | ||
security | ||
sound | ||
sphinx | ||
sphinx-static | ||
spi | ||
staging | ||
target | ||
tee | ||
timers | ||
tools | ||
trace | ||
translations | ||
usb | ||
userspace-api | ||
virt | ||
w1 | ||
watchdog | ||
wmi | ||
.gitignore | ||
atomic_bitops.txt | ||
atomic_t.txt | ||
Changes | ||
CodingStyle | ||
conf.py | ||
docutils.conf | ||
dontdiff | ||
index.rst | ||
Kconfig | ||
Makefile | ||
memory-barriers.txt | ||
SubmittingPatches | ||
subsystem-apis.rst |