Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2025-01-07 14:32:23 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
eecf398545
linux-next/arch/x86/kvm
History
Sean Christopherson eecf398545 KVM: x86: Use '0' for guest RIP if PMI encounters protected guest state 
Explicitly return '0' for guest RIP when handling a PMI VM-Exit for a vCPU
with protected guest state, i.e. when KVM can't read the real RIP.  While
there is no "right" value, and profiling a protect guest is rather futile,
returning the last known RIP is worse than returning obviously "bad" data.
E.g. for SEV-ES+, the last known RIP will often point somewhere in the
guest's boot flow.

Opportunistically add WARNs to effectively assert that the in_kernel() and
get_ip() callbacks are restricted to the common PMI handler, as the return
values for the protected guest state case are largely arbitrary, i.e. only
make any sense whatsoever for PMIs, where the returned values have no
functional impact and thus don't truly matter.

Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Link: https://lore.kernel.org/r/20241009175002.1118178-5-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
2024-11-01 09:22:23 -07:00
..
mmu KVM: x86/mmu: Add lockdep assert to enforce safe usage of kvm_unmap_gfn_range() 2024-10-20 07:31:05 -04:00
svm KVM: x86: Bypass register cache when querying CPL from kvm_sched_out() 2024-11-01 09:22:21 -07:00
vmx KVM: x86: Bypass register cache when querying CPL from kvm_sched_out() 2024-11-01 09:22:21 -07:00
.gitignore KVM: x86: use a separate asm-offsets.c file 2022-11-09 12:10:17 -05:00
cpuid.c KVM: x86: AMD's IBPB is not equivalent to Intel's IBPB 2024-11-01 09:22:20 -07:00
cpuid.h KVM: x86: Bury guest_cpuid_is_amd_or_hygon() in cpuid.c 2024-06-10 14:29:39 -07:00
debugfs.c KVM: Get rid of return value from kvm_arch_create_vm_debugfs() 2024-02-23 21:44:58 +00:00
emulate.c ARM: 2024-07-20 12:41:03 -07:00
fpu.h KVM: x86: Move FPU register accessors into fpu.h 2021-06-17 13:09:24 -04:00
governed_features.h KVM: x86: Use KVM-governed feature framework to track "LAM enabled" 2023-11-28 17:54:09 -08:00
hyperv.c KVM: x86: Introduce kvm_x86_call() to simplify static calls of kvm_x86_ops 2024-07-16 12:14:12 -04:00
hyperv.h KVM: x86: hyper-v: Remove unused inline function kvm_hv_free_pa_page() 2024-08-13 09:28:48 -04:00
i8254.c KVM: x86: Unify pr_fmt to use module name for all KVM modules 2022-12-29 15:47:35 -05:00
i8254.h KVM: x86: PIT: Preserve state of speaker port data bit 2022-06-08 13:06:20 -04:00
i8259.c KVM: x86: Fix poll command 2023-06-01 13:44:13 -07:00
ioapic.c KVM: x86/ioapic: Resample the pending state of an IRQ when unmasking 2023-03-27 10:13:28 -04:00
ioapic.h x86/kvm: remove unused ack_notifier callbacks 2021-11-18 07:05:57 -05:00
irq_comm.c KVM: x86: Don't re-setup empty IRQ routing when KVM_CAP_SPLIT_IRQCHIP 2024-06-11 14:18:40 -07:00
irq.c KVM: x86: Fold kvm_get_apic_interrupt() into kvm_cpu_get_interrupt() 2024-09-09 20:15:01 -07:00
irq.h KVM: x86: Don't re-setup empty IRQ routing when KVM_CAP_SPLIT_IRQCHIP 2024-06-11 14:18:40 -07:00
Kconfig KVM: x86: leave kvm.ko out of the build if no vendor module is requested 2024-10-06 03:53:41 -04:00
kvm_cache_regs.h KVM: x86: Add lockdep-guarded asserts on register cache usage 2024-11-01 09:22:22 -07:00
kvm_emulate.h KVM: x86: Use "is Intel compatible" helper to emulate SYSCALL in !64-bit 2024-06-10 14:29:38 -07:00
kvm_onhyperv.c KVM: x86/mmu: Move filling of Hyper-V's TLB range struct into Hyper-V code 2023-04-10 15:17:29 -07:00
kvm_onhyperv.h KVM: x86: Move Hyper-V partition assist page out of Hyper-V emulation context 2023-12-07 09:34:01 -08:00
kvm-asm-offsets.c KVM: SVM: move MSR_IA32_SPEC_CTRL save/restore to assembly 2022-11-09 12:25:53 -05:00
lapic.c Merge tag 'kvm-x86-vmx-6.12' of https://github.com/kvm-x86/linux into HEAD 2024-09-17 12:41:23 -04:00
lapic.h Merge tag 'kvm-x86-vmx-6.12' of https://github.com/kvm-x86/linux into HEAD 2024-09-17 12:41:23 -04:00
Makefile KVM: x86: leave kvm.ko out of the build if no vendor module is requested 2024-10-06 03:53:41 -04:00
mmu.h KVM: x86: Remove some unused declarations 2024-09-09 20:12:43 -07:00
mtrr.c KVM: x86: Remove VMX support for virtualizing guest MTRR memtypes 2024-06-05 08:13:14 -07:00
pmu.c KVM: x86/pmu: Add kvm_pmu_call() to simplify static calls of kvm_pmu_ops 2024-07-16 12:14:12 -04:00
pmu.h KVM: x86/pmu: Introduce distinct macros for GP/fixed counter max number 2024-06-28 09:12:16 -07:00
reverse_cpuid.h KVM: x86: Advertise AVX10.1 CPUID to userspace 2024-08-22 11:25:25 -07:00
smm.c KVM: x86: Forcibly leave nested if RSM to L2 hits shutdown 2024-09-09 20:09:49 -07:00
smm.h KVM: x86: smm: preserve interrupt shadow in SMRAM 2022-11-09 12:31:26 -05:00
trace.h KVM: x86: Introduce kvm_x86_call() to simplify static calls of kvm_x86_ops 2024-07-16 12:14:12 -04:00
tss.h
x86.c KVM: x86: Use '0' for guest RIP if PMI encounters protected guest state 2024-11-01 09:22:23 -07:00
x86.h Merge tag 'kvm-x86-pat_vmx_msrs-6.12' of https://github.com/kvm-x86/linux into HEAD 2024-09-17 12:40:39 -04:00
xen.c KVM: x86: Introduce kvm_x86_call() to simplify static calls of kvm_x86_ops 2024-07-16 12:14:12 -04:00
xen.h KVM: x86/xen: inject vCPU upcall vector when local APIC is enabled 2024-03-04 16:22:36 -08:00