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Kyung Min Park e1b35da5e6 x86: Enumerate AVX512 FP16 CPUID feature flag 
Enumerate AVX512 Half-precision floating point (FP16) CPUID feature
flag. Compared with using FP32, using FP16 cut the number of bits
required for storage in half, reducing the exponent from 8 bits to 5,
and the mantissa from 23 bits to 10. Using FP16 also enables developers
to train and run inference on deep learning models fast when all
precision or magnitude (FP32) is not needed.

A processor supports AVX512 FP16 if CPUID.(EAX=7,ECX=0):EDX[bit 23]
is present. The AVX512 FP16 requires AVX512BW feature be implemented
since the instructions for manipulating 32bit masks are associated with
AVX512BW.

The only in-kernel usage of this is kvm passthrough. The CPU feature
flag is shown as "avx512_fp16" in /proc/cpuinfo.

Signed-off-by: Kyung Min Park <kyung.min.park@intel.com>
Acked-by: Dave Hansen <dave.hansen@intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Message-Id: <20201208033441.28207-2-kyung.min.park@intel.com>
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-12-11 19:00:58 -05:00
..
acpi
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
apic
x86/platform/uv: Recognize UV5 hubless system identifier
2020-11-07 11:17:39 +01:00
cpu
x86: Enumerate AVX512 FP16 CPUID feature flag
2020-12-11 19:00:58 -05:00
fpu
* Allow clearcpuid= to accept multiple bits, by Arvind Sankar.
2020-10-12 10:49:46 -07:00
kprobes
objtool changes for v5.10:
2020-10-14 10:13:37 -07:00
.gitignore
.gitignore: add SPDX License Identifier
2020-03-25 11:50:48 +01:00
alternative.c
A couple of x86 fixes which missed rc1 due to my stupidity:
2020-10-27 14:39:29 -07:00
amd_gart_64.c
dma-mapping: split <linux/dma-mapping.h>
2020-10-06 07:07:03 +02:00
amd_nb.c
x86/amd_nb: Add AMD family 17h model 60h PCI IDs
2020-05-22 18:24:40 +02:00
apb_timer.c
x86/apb_timer: Drop unused TSC calibration
2020-05-27 13:05:59 +02:00
aperture_64.c
x86/gart: Exclude GART aperture from kcore
2019-03-23 12:11:49 +01:00
apm_32.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118
2019-05-24 17:39:02 +02:00
asm-offsets_32.c
x86 entry code updates:
2020-03-30 19:14:28 -07:00
asm-offsets_64.c
x86/entry: Remove DBn stacks
2020-06-11 15:15:23 +02:00
asm-offsets.c
x86: remove address space overrides using set_fs()
2020-09-08 22:21:36 -04:00
audit_64.c
x86/audit: Fix a -Wmissing-prototypes warning for ia32_classify_syscall()
2020-05-19 18:03:07 +02:00
bootflag.c
…
check.c
…
cpuid.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 142
2019-05-30 11:25:17 -07:00
crash_core_32.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
crash_core_64.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
crash_dump_32.c
…
crash_dump_64.c
fs/core/vmcore: Move sev_active() reference to x86 arch code
2019-08-09 22:52:10 +10:00
crash.c
x86/crash: Correct the address boundary of function parameters
2020-08-07 01:32:00 +02:00
devicetree.c
x86_ioapic_Consolidate_IOAPIC_allocation
2020-09-16 16:52:32 +02:00
doublefault_32.c
x86/entry: Convert double fault exception to IDTENTRY_DF
2020-06-11 15:15:03 +02:00
dumpstack_32.c
x86/32: Remove CONFIG_DOUBLEFAULT
2020-04-14 14:24:05 +02:00
dumpstack_64.c
x86/dumpstack/64: Add noinstr version of get_stack_info()
2020-09-09 11:33:19 +02:00
dumpstack.c
This feature enhances the current guest memory encryption support
2020-10-14 10:21:34 -07:00
e820.c
efi/fake_mem: arrange for a resource entry per efi_fake_mem instance
2020-10-13 18:38:27 -07:00
early_printk.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
early-quirks.c
x86/gpu: add RKL stolen memory support
2020-05-20 08:35:22 -07:00
ebda.c
…
eisa.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 243
2019-06-19 17:09:07 +02:00
espfix_64.c
mm: introduce include/linux/pgtable.h
2020-06-09 09:39:13 -07:00
ftrace_32.S
x86: Change {JMP,CALL}_NOSPEC argument
2020-04-30 20:14:34 +02:00
ftrace_64.S
x86/ftrace: Do not jump to direct code in created trampolines
2020-06-29 11:42:48 -04:00
ftrace.c
x86/ftrace: Do not jump to direct code in created trampolines
2020-06-29 11:42:48 -04:00
head32.c
…
head64.c
treewide: Convert macro and uses of __section(foo) to __section("foo")
2020-10-25 14:51:49 -07:00
head_32.S
x86/xen: remove 32-bit Xen PV guest support
2020-08-11 08:26:48 +02:00
head_64.S
x86/head/64: Check SEV encryption before switching to kernel page-table
2020-10-29 18:09:59 +01:00
hpet.c
remove ioremap_nocache and devm_ioremap_nocache
2020-01-06 09:45:59 +01:00
hw_breakpoint.c
x86/debug: Change thread.debugreg6 to thread.virtual_dr6
2020-09-04 15:12:58 +02:00
i8237.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
i8253.c
x86/timer: Skip PIT initialization on modern chipsets
2019-06-29 11:35:35 +02:00
i8259.c
x86/i8259: Use printk_deferred() to prevent deadlock
2020-07-29 16:27:16 +02:00
idt.c
This feature enhances the current guest memory encryption support
2020-10-14 10:21:34 -07:00
ima_arch.c
EFI updates for v5.7:
2020-02-26 15:21:22 +01:00
io_delay.c
x86/io_delay: Define IO_DELAY macros in C instead of Kconfig
2019-05-24 08:46:06 +02:00
ioport.c
x86/ioperm: Prevent a memory leak when fork fails
2020-05-28 21:36:20 +02:00
irq_32.c
x86/irq: Rework handle_irq() for 64-bit
2020-06-11 15:15:12 +02:00
irq_64.c
x86/irq: Make run_on_irqstack_cond() typesafe
2020-09-22 22:13:34 +02:00
irq_work.c
x86/entry: Convert various system vectors
2020-06-11 15:15:14 +02:00
irq.c
x86/irq: Make run_on_irqstack_cond() typesafe
2020-09-22 22:13:34 +02:00
irqflags.S
x86/asm: Change all ENTRY+ENDPROC to SYM_FUNC_*
2019-10-18 11:58:33 +02:00
irqinit.c
x86/headers: Remove APIC headers from <asm/smp.h>
2020-08-06 16:13:09 +02:00
itmt.c
sysctl: pass kernel pointers to ->proc_handler
2020-04-27 02:07:40 -04:00
jailhouse.c
locking/seqlock, headers: Untangle the spaghetti monster
2020-08-06 16:13:13 +02:00
jump_label.c
x86/jump_label: Move 'inline' keyword placement
2020-03-27 11:05:41 +01:00
kdebugfs.c
x86/boot: Introduce setup_indirect
2019-11-12 16:21:15 +01:00
kexec-bzimage64.c
x86/kexec: Use up-to-dated screen_info copy to fill boot params
2020-10-14 17:05:03 +02:00
kgdb.c
x86/debug: Change thread.debugreg6 to thread.virtual_dr6
2020-09-04 15:12:58 +02:00
ksysfs.c
x86/boot: Introduce setup_indirect
2019-11-12 16:21:15 +01:00
kvm.c
ARM:
2020-10-23 11:17:56 -07:00
kvmclock.c
x86/kvm: remove unused macro HV_CLOCK_SIZE
2020-11-16 13:14:21 -05:00
ldt.c
x86/ldt: use "pr_info_once()" instead of open-coding it badly
2020-07-05 12:50:20 -07:00
machine_kexec_32.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
machine_kexec_64.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
Makefile
x86/head/64: Disable stack protection for head$(BITS).o
2020-10-19 13:11:00 +02:00
mmconf-fam10h_64.c
…
module.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
mpparse.c
Surgery of the MSI interrupt handling to prepare the support of upcoming
2020-10-12 11:40:41 -07:00
msr.c
x86/msr: Make source of unrecognised MSR writes unambiguous
2020-08-22 11:40:38 +02:00
nmi_selftest.c
…
nmi.c
This feature enhances the current guest memory encryption support
2020-10-14 10:21:34 -07:00
paravirt_patch.c
x86/paravirt: Remove 32-bit support from CONFIG_PARAVIRT_XXL
2020-08-15 13:52:11 +02:00
paravirt-spinlocks.c
…
paravirt.c
x86/paravirt: Remove set_pte_at() pv-op
2020-08-15 13:52:12 +02:00
pci-dma.c
dma-mapping: move dma-debug.h to kernel/dma/
2020-10-06 07:07:05 +02:00
pci-iommu_table.c
…
pci-swiotlb.c
dma-mapping: fix filename references
2019-09-03 08:36:30 +02:00
pcspeaker.c
…
perf_regs.c
perf/x86/regs: Check reserved bits
2019-06-24 19:19:24 +02:00
platform-quirks.c
…
pmem.c
…
probe_roms.c
maccess: make get_kernel_nofault() check for minimal type compatibility
2020-06-18 12:10:37 -07:00
process_32.c
x86/dumpstack: Add log_lvl to __show_regs()
2020-07-22 23:56:53 +02:00
process_64.c
x86/fsgsbase: Replace static_cpu_has() with boot_cpu_has()
2020-08-24 18:18:32 +02:00
process.c
x86/unwind/fp: Fix FP unwinding in ret_from_fork
2020-09-18 09:59:40 +02:00
process.h
x86: Use the correct SPDX License Identifier in headers
2019-10-01 20:31:35 +02:00
ptrace.c
x86/debug: Change thread.debugreg6 to thread.virtual_dr6
2020-09-04 15:12:58 +02:00
pvclock.c
x86/vdso: Use generic VDSO clock mode storage
2020-02-17 14:40:23 +01:00
quirks.c
x86, powerpc: Rename memcpy_mcsafe() to copy_mc_to_{user, kernel}()
2020-10-06 11:18:04 +02:00
reboot_fixups_32.c
…
reboot.c
objtool: Rename frame.h -> objtool.h
2020-09-10 10:43:13 -05:00
relocate_kernel_32.S
x86/asm: Annotate relocate_kernel_{32,64}.c
2019-10-18 09:53:19 +02:00
relocate_kernel_64.S
x86/kexec: Make relocate_kernel_64.S objtool clean
2020-03-25 18:28:28 +01:00
resource.c
…
rtc.c
…
setup_percpu.c
x86/mm: remove vmalloc faulting
2020-06-02 10:59:12 -07:00
setup.c
dma-mapping updates for 5.10
2020-10-15 14:43:29 -07:00
sev_verify_cbit.S
x86/boot/compressed/64: Check SEV encryption in 64-bit boot-path
2020-10-29 18:06:52 +01:00
sev-es-shared.c
x86/boot/compressed/64: Sanity-check CPUID results in the early #VC handler
2020-10-29 13:48:49 +01:00
sev-es.c
x86/sev-es: Do not support MMIO to/from encrypted memory
2020-10-29 19:27:42 +01:00
signal_compat.c
arm64: mte: Add specific SIGSEGV codes
2020-09-04 12:46:06 +01:00
signal.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
smp.c
x86/entry: Convert reschedule interrupt to IDTENTRY_SYSVEC_SIMPLE
2020-06-11 15:15:16 +02:00
smpboot.c
x86/smpboot: Load TSS and getcpu GDT entry before loading IDT
2020-09-09 11:33:20 +02:00
stacktrace.c
stacktrace: Remove reliable argument from arch_stack_walk() callback
2020-09-18 14:24:16 +01:00
static_call.c
static_call: Allow early init
2020-09-01 09:58:06 +02:00
step.c
…
sys_ia32.c
x86: switch to kernel_clone()
2020-08-20 13:12:58 +02:00
sys_x86_64.c
x86: Remove unneeded includes
2020-03-21 16:03:25 +01:00
sysfb_efi.c
x86/sysfb_efi: Add quirks for some devices with swapped width and height
2019-07-22 10:47:11 +02:00
sysfb_simplefb.c
x86/sysfb: Fix check for bad VRAM size
2020-01-20 10:57:53 +01:00
sysfb.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
tboot.c
mmap locking API: add MMAP_LOCK_INITIALIZER
2020-06-09 09:39:14 -07:00
time.c
A set of fixes and updates for x86:
2020-06-11 15:54:31 -07:00
tls.c
x86: switch to ->regset_get()
2020-07-27 14:31:07 -04:00
tls.h
x86: switch to ->regset_get()
2020-07-27 14:31:07 -04:00
topology.c
x86/headers: Remove APIC headers from <asm/smp.h>
2020-08-06 16:13:09 +02:00
trace_clock.c
…
tracepoint.c
x86/entry: Convert reschedule interrupt to IDTENTRY_SYSVEC_SIMPLE
2020-06-11 15:15:16 +02:00
traps.c
x86/debug: Fix DR_STEP vs ptrace_get_debugreg(6)
2020-10-27 23:15:24 +01:00
tsc_msr.c
Misc fixes and small updates all around the place:
2020-08-15 10:38:03 -07:00
tsc_sync.c
x86: Fix a handful of typos
2020-02-16 20:58:06 +01:00
tsc.c
x86/tsc: Use seqcount_latch_t
2020-09-10 11:19:29 +02:00
umip.c
x86/umip: Factor out instruction decoding
2020-09-07 19:45:24 +02:00
unwind_frame.c
fork-v5.9
2020-08-04 14:47:45 -07:00
unwind_guess.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
unwind_orc.c
A couple of x86 fixes which missed rc1 due to my stupidity:
2020-10-27 14:39:29 -07:00
uprobes.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
verify_cpu.S
x86/asm: Annotate local pseudo-functions
2019-10-18 10:04:04 +02:00
vm86_32.c
mmap locking API: use coccinelle to convert mmap_sem rwsem call sites
2020-06-09 09:39:14 -07:00
vmlinux.lds.S
This tree introduces static_call(), which is the idea of static_branch()
2020-10-12 13:58:15 -07:00
vsmp_64.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 346
2019-06-05 17:37:08 +02:00
x86_init.c
x86/irq: Cleanup the arch_*_msi_irqs() leftovers
2020-09-16 16:52:38 +02:00