MSR_AMD64_SEV even though the spec clearly states so, and check CPUID
bits first.
- Send only one signal to a task when it is a SEGV_PKUERR si_code type.
- Do away with all the wankery of reserving X amount of memory in
the first megabyte to prevent BIOS corrupting it and simply and
unconditionally reserve the whole first megabyte.
- Make alternatives NOP optimization work at an arbitrary position
within the patched sequence because the compiler can put single-byte
NOPs for alignment anywhere in the sequence (32-bit retpoline), vs our
previous assumption that the NOPs are only appended.
- Force-disable ENQCMD[S] instructions support and remove update_pasid()
because of insufficient protection against FPU state modification in an
interrupt context, among other xstate horrors which are being addressed
at the moment. This one limits the fallout until proper enablement.
- Use cpu_feature_enabled() in the idxd driver so that it can be
build-time disabled through the defines in .../asm/disabled-features.h.
- Fix LVT thermal setup for SMI delivery mode by making sure the APIC
LVT value is read before APIC initialization so that softlockups during
boot do not happen at least on one machine.
- Mark all legacy interrupts as legacy vectors when the IO-APIC is
disabled and when all legacy interrupts are routed through the PIC.
-----BEGIN PGP SIGNATURE-----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=zRI1
-----END PGP SIGNATURE-----
Merge tag 'x86_urgent_for_v5.13-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Borislav Petkov:
"A bunch of x86/urgent stuff accumulated for the last two weeks so
lemme unload it to you.
It should be all totally risk-free, of course. :-)
- Fix out-of-spec hardware (1st gen Hygon) which does not implement
MSR_AMD64_SEV even though the spec clearly states so, and check
CPUID bits first.
- Send only one signal to a task when it is a SEGV_PKUERR si_code
type.
- Do away with all the wankery of reserving X amount of memory in the
first megabyte to prevent BIOS corrupting it and simply and
unconditionally reserve the whole first megabyte.
- Make alternatives NOP optimization work at an arbitrary position
within the patched sequence because the compiler can put
single-byte NOPs for alignment anywhere in the sequence (32-bit
retpoline), vs our previous assumption that the NOPs are only
appended.
- Force-disable ENQCMD[S] instructions support and remove
update_pasid() because of insufficient protection against FPU state
modification in an interrupt context, among other xstate horrors
which are being addressed at the moment. This one limits the
fallout until proper enablement.
- Use cpu_feature_enabled() in the idxd driver so that it can be
build-time disabled through the defines in disabled-features.h.
- Fix LVT thermal setup for SMI delivery mode by making sure the APIC
LVT value is read before APIC initialization so that softlockups
during boot do not happen at least on one machine.
- Mark all legacy interrupts as legacy vectors when the IO-APIC is
disabled and when all legacy interrupts are routed through the PIC"
* tag 'x86_urgent_for_v5.13-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/sev: Check SME/SEV support in CPUID first
x86/fault: Don't send SIGSEGV twice on SEGV_PKUERR
x86/setup: Always reserve the first 1M of RAM
x86/alternative: Optimize single-byte NOPs at an arbitrary position
x86/cpufeatures: Force disable X86_FEATURE_ENQCMD and remove update_pasid()
dmaengine: idxd: Use cpu_feature_enabled()
x86/thermal: Fix LVT thermal setup for SMI delivery mode
x86/apic: Mark _all_ legacy interrupts when IO/APIC is missing
773ac53bbf