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linux-stable/arch/x86/kernel
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Thomas Gleixner 5429cead01 x86/fpu: Provide fpu_sync_guest_vmexit_xfd_state() 
KVM can disable the write emulation for the XFD MSR when the vCPU's fpstate
is already correctly sized to reduce the overhead.

When write emulation is disabled the XFD MSR state after a VMEXIT is
unknown and therefore not in sync with the software states in fpstate and
the per CPU XFD cache.

Provide fpu_sync_guest_vmexit_xfd_state() which has to be invoked after a
VMEXIT before enabling interrupts when write emulation is disabled for the
XFD MSR.

It could be invoked unconditionally even when write emulation is enabled
for the price of a pointless MSR read.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20220105123532.12586-21-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14 13:44:42 -05:00
..
acpi x86: ACPI: cstate: Optimize C3 entry on AMD CPUs 2021-10-01 20:44:31 +02:00
apic x86/apic: Reduce cache line misses in __x2apic_send_IPI_mask() 2021-10-29 10:02:17 +02:00
cpu Two X86 fixes: 2021-11-21 11:25:19 -08:00
fpu x86/fpu: Provide fpu_sync_guest_vmexit_xfd_state() 2022-01-14 13:44:42 -05:00
kprobes ftrace: disable preemption when recursion locked 2021-10-27 11:21:49 -04:00
.gitignore
alternative.c x86/alternative: Add debug prints to apply_retpolines() 2021-10-28 23:25:28 +02:00
amd_gart_64.c x86/amd_gart: don't set failed sg dma_address to DMA_MAPPING_ERROR 2021-08-09 17:13:06 +02:00
amd_nb.c hwmon: (k10temp) Add support for yellow carp 2021-08-27 13:54:58 -07:00
aperture_64.c proc/vmcore: convert oldmem_pfn_is_ram callback to more generic vmcore callbacks 2021-11-09 10:02:48 -08:00
apm_32.c x86: Fix various typos in comments, take #2 2021-03-21 23:50:28 +01:00
asm-offsets.c x86/paravirt: Switch iret pvops to ALTERNATIVE 2021-03-11 19:58:54 +01:00
asm-offsets_32.c x86/stackprotector/32: Make the canary into a regular percpu variable 2021-03-08 13:19:05 +01:00
asm-offsets_64.c x86/xen: Drop USERGS_SYSRET64 paravirt call 2021-02-10 12:32:07 +01:00
audit_64.c audit: add support for the openat2 syscall 2021-10-01 16:52:48 -04:00
bootflag.c
cc_platform.c x86/sev: Add an x86 version of cc_platform_has() 2021-10-04 11:46:20 +02:00
check.c
cpuid.c smp: Cleanup smp_call_function*() 2020-11-24 16:47:49 +01:00
crash.c x86/crash: Remove crash_reserve_low_1M() 2021-06-07 12:14:45 +02:00
crash_core_32.c
crash_core_64.c
crash_dump_32.c x86/crashdump/32: Simplify copy_oldmem_page() 2020-11-24 14:42:09 +01:00
crash_dump_64.c x86/sev: Replace occurrences of sev_active() with cc_platform_has() 2021-10-04 11:46:58 +02:00
devicetree.c Devicetree updates for v5.16: 2021-11-02 22:22:13 -07:00
doublefault_32.c exit/doublefault: Remove apparently bogus comment about rewind_stack_do_exit 2021-10-20 13:09:43 -05:00
dumpstack.c x86/dumpstack: use %pSb/%pBb for backtrace printing 2021-07-08 11:48:22 -07:00
dumpstack_32.c
dumpstack_64.c x86/mm/64: Improve stack overflow warnings 2021-09-21 13:57:43 +02:00
e820.c Power management updates for 5.13-rc1 2021-04-26 15:10:25 -07:00
early-quirks.c x86/hpet: Use another crystalball to evaluate HPET usability 2021-10-01 13:38:13 +02:00
early_printk.c
ebda.c
eisa.c
espfix_64.c
ftrace.c x86/ftrace: Make function graph use ftrace directly 2021-10-20 23:44:43 -04:00
ftrace_32.S
ftrace_64.S x86/ftrace: Make function graph use ftrace directly 2021-10-20 23:44:43 -04:00
head32.c
head64.c treewide: Replace the use of mem_encrypt_active() with cc_platform_has() 2021-10-04 11:47:24 +02:00
head_32.S printk: Userspace format indexing support 2021-07-19 11:57:48 +02:00
head_64.S x86/entry: Unify definitions from <asm/calling.h> and <asm/ptrace-abi.h> 2021-05-12 10:49:13 +02:00
hpet.c x86/hpet: Use another crystalball to evaluate HPET usability 2021-10-01 13:38:13 +02:00
hw_breakpoint.c x86/debug: Prevent data breakpoints on cpu_dr7 2021-02-05 20:13:12 +01:00
i8237.c
i8253.c
i8259.c x86: Avoid magic number with ELCR register accesses 2021-08-10 23:31:43 +02:00
idt.c X86 interrupt related changes: 2021-06-29 12:36:59 -07:00
io_delay.c
ioport.c
irq.c x86/irq: Ensure PI wakeup handler is unregistered before module unload 2021-10-22 12:45:35 -04:00
irq_32.c x86/softirq: Disable softirq stacks on PREEMPT_RT 2021-09-27 12:28:32 +02:00
irq_64.c x86/softirq/64: Inline do_softirq_own_stack() 2021-02-10 23:34:17 +01:00
irq_work.c
irqflags.S x86/xen: Make save_fl() noinstr 2021-09-17 13:14:44 +02:00
irqinit.c x86/headers: Remove APIC headers from <asm/smp.h> 2020-08-06 16:13:09 +02:00
itmt.c x86/sched: Decrease further the priorities of SMT siblings 2021-10-05 15:51:59 +02:00
jailhouse.c locking/seqlock, headers: Untangle the spaghetti monster 2020-08-06 16:13:13 +02:00
jump_label.c jump_labels: Mark __jump_label_transform() as __always_inlined to work around aggressive compiler un-inlining 2021-07-13 06:32:05 +02:00
kdebugfs.c
kexec-bzimage64.c x86: Use ELF fields defined in 'struct kimage' 2021-03-08 12:06:29 -07:00
kgdb.c x86: Fix various typos in comments 2021-03-18 15:31:53 +01:00
ksysfs.c
kvm.c x86/kvm: Silence per-cpu pr_info noise about KVM clocks and steal time 2022-01-07 10:44:43 -05:00
kvmclock.c x86/kvm: Silence per-cpu pr_info noise about KVM clocks and steal time 2022-01-07 10:44:43 -05:00
ldt.c memcg: enable accounting for ldt_struct objects 2021-09-03 09:58:13 -07:00
machine_kexec_32.c x86/kexec: Set_[gi]dt() -> native_[gi]dt_invalidate() in machine_kexec_*.c 2021-05-21 12:36:45 +02:00
machine_kexec_64.c x86/sev: Replace occurrences of sev_active() with cc_platform_has() 2021-10-04 11:46:58 +02:00
Makefile x86/sev: Add an x86 version of cc_platform_has() 2021-10-04 11:46:20 +02:00
mmconf-fam10h_64.c x86/msr: Rename MSR_K8_SYSCFG to MSR_AMD64_SYSCFG 2021-05-10 07:51:38 +02:00
module.c x86/alternative: Implement .retpoline_sites support 2021-10-28 23:25:27 +02:00
mpparse.c x86: Avoid magic number with ELCR register accesses 2021-08-10 23:31:43 +02:00
msr.c x86/MSR: Filter MSR writes through X86_IOC_WRMSR_REGS ioctl too 2021-01-27 19:06:47 +01:00
nmi.c x86/sev-es: Rename sev-es.{ch} to sev.{ch} 2021-05-10 07:40:27 +02:00
nmi_selftest.c
paravirt-spinlocks.c x86/paravirt: Add new features for paravirt patching 2021-03-11 19:51:49 +01:00
paravirt.c Merge branch 'kvm-guest-sev-migration' into kvm-master 2021-11-11 07:40:26 -05:00
pci-dma.c dma-mapping: move dma-debug.h to kernel/dma/ 2020-10-06 07:07:05 +02:00
pci-iommu_table.c x86: Remove definition of DEBUG 2021-01-15 08:23:10 +01:00
pci-swiotlb.c x86/sme: Replace occurrences of sme_active() with cc_platform_has() 2021-10-04 11:46:46 +02:00
pcspeaker.c
perf_regs.c - Remove all uses of TIF_IA32 and TIF_X32 and reclaim the two bits in the end 2020-12-14 13:45:26 -08:00
platform-quirks.c
pmem.c
probe_roms.c x86/pci/probe_roms: Use to_pci_driver() instead of pci_dev->driver 2021-10-18 09:20:15 -05:00
process.c x86/fpu: Extend fpu_xstate_prctl() with guest permissions 2022-01-07 13:33:03 -05:00
process.h
process_32.c x86/fpu: Move context switch and exit to user inlines into sched.h 2021-10-20 15:27:27 +02:00
process_64.c x86/fpu: Move context switch and exit to user inlines into sched.h 2021-10-20 15:27:27 +02:00
ptrace.c x86/fpu: Remove internal.h dependency from fpu/signal.h 2021-10-20 15:27:29 +02:00
pvclock.c x86: Fix various typos in comments 2021-03-18 15:31:53 +01:00
quirks.c x86, powerpc: Rename memcpy_mcsafe() to copy_mc_to_{user, kernel}() 2020-10-06 11:18:04 +02:00
reboot.c x86/reboot: Limit Dell Optiplex 990 quirk to early BIOS versions 2021-08-12 12:06:58 +02:00
reboot_fixups_32.c
relocate_kernel_32.S x86: Fix various typos in comments, take #2 2021-03-21 23:50:28 +01:00
relocate_kernel_64.S x86/sme: Replace occurrences of sme_active() with cc_platform_has() 2021-10-04 11:46:46 +02:00
resource.c
rtc.c
setup.c x86/boot: Mark prepare_command_line() __init 2021-11-24 12:20:24 +01:00
setup_percpu.c memblock: use memblock_free for freeing virtual pointers 2021-11-06 13:30:41 -07:00
sev-shared.c - Export sev_es_ghcb_hv_call() so that HyperV Isolation VMs can use it too 2021-11-01 15:52:26 -07:00
sev.c x86/sev: Fix SEV-ES INS/OUTS instructions for word, dword, and qword 2021-12-03 18:09:30 +01:00
sev_verify_cbit.S x86/boot/compressed/64: Check SEV encryption in 64-bit boot-path 2020-10-29 18:06:52 +01:00
signal.c x86/signal: Use fpu::__state_user_size for sigalt stack validation 2021-10-26 10:18:09 +02:00
signal_compat.c signal: Verify the alignment and size of siginfo_t 2021-07-23 13:15:31 -05:00
smp.c x86: Fix various typos in comments, take #2 2021-03-21 23:50:28 +01:00
smpboot.c x86/smp: Factor out parts of native_smp_prepare_cpus() 2021-11-11 13:09:32 +01:00
stacktrace.c stacktrace: Move documentation for arch_stack_walk_reliable() to header 2021-03-10 15:52:31 +01:00
static_call.c static_call,x86: Robustify trampoline patching 2021-11-11 13:09:31 +01:00
step.c entry: Ensure trap after single-step on system call return 2021-02-06 00:21:42 +01:00
sys_ia32.c x86: switch to kernel_clone() 2020-08-20 13:12:58 +02:00
sys_x86_64.c x86/mm: Refine mmap syscall implementation 2021-01-05 19:07:42 +01:00
tboot.c x86/boot/tboot: Avoid Wstringop-overread-warning 2021-03-23 00:16:13 +01:00
time.c
tls.c x86/stackprotector/32: Make the canary into a regular percpu variable 2021-03-08 13:19:05 +01:00
tls.h
topology.c x86: Fix various typos in comments 2021-03-18 15:31:53 +01:00
trace.c trace/osnoise: Fix an ifdef comment 2021-10-25 23:02:36 -04:00
trace_clock.c
tracepoint.c
traps.c - Do not #GP on userspace use of CLI/STI but pretend it was a NOP to 2021-11-02 07:56:47 -07:00
tsc.c x86/tsc: Disable clocksource watchdog for TSC on qualified platorms 2021-12-02 00:40:36 +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/tsc: Add a timer to make sure TSC_adjust is always checked 2021-12-02 00:40:35 +01:00
umip.c x86/umip: Downgrade warning messages to debug loglevel 2021-09-25 13:23:28 +02:00
unwind_frame.c x86/unwind: Recover kretprobe trampoline entry 2021-09-30 21:24:07 -04:00
unwind_guess.c x86/unwind: Recover kretprobe trampoline entry 2021-09-30 21:24:07 -04:00
unwind_orc.c Merge branch 'akpm' (patches from Andrew) 2021-11-09 10:11:53 -08:00
uprobes.c x86/uprobes: Convert to insn_decode() 2021-03-15 12:05:03 +01:00
verify_cpu.S
vm86_32.c signal: Replace force_fatal_sig with force_exit_sig when in doubt 2021-11-19 09:15:58 -06:00
vmlinux.lds.S objtool,x86: Replace alternatives with .retpoline_sites 2021-10-28 23:25:25 +02:00
vsmp_64.c
x86_init.c x86/apic: Support 15 bits of APIC ID in MSI where available 2020-10-28 20:26:29 +01:00