linux/virt/kvm
Sean Christopherson 77bcd9e623 KVM: Add dedicated arch hook for querying if vCPU was preempted in-kernel
Plumb in a dedicated hook for querying whether or not a vCPU was preempted
in-kernel.  Unlike literally every other architecture, x86's VMX can check
if a vCPU is in kernel context if and only if the vCPU is loaded on the
current pCPU.

x86's kvm_arch_vcpu_in_kernel() works around the limitation by querying
kvm_get_running_vcpu() and redirecting to vcpu->arch.preempted_in_kernel
as needed.  But that's unnecessary, confusing, and fragile, e.g. x86 has
had at least one bug where KVM incorrectly used a stale
preempted_in_kernel.

No functional change intended.

Reviewed-by: Yuan Yao <yuan.yao@intel.com>
Link: https://lore.kernel.org/r/20240110003938.490206-2-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
2024-02-22 16:26:26 -08:00
..
async_pf.c mm/gup: remove vmas parameter from get_user_pages_remote() 2023-06-09 16:25:26 -07:00
async_pf.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 504 2019-06-19 17:09:56 +02:00
binary_stats.c KVM: stats: remove dead stores 2021-08-13 03:35:15 -04:00
coalesced_mmio.c KVM: destruct kvm_io_device while unregistering it from kvm_io_bus 2023-06-13 14:18:09 -07:00
coalesced_mmio.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dirty_ring.c KVM: Allow arch code to track number of memslot address spaces per VM 2023-11-14 08:01:05 -05:00
eventfd.c Generic: 2024-01-17 13:03:37 -08:00
guest_memfd.c Generic: 2024-01-17 13:03:37 -08:00
irqchip.c KVM: replace direct irq.h inclusion 2022-11-09 12:31:37 -05:00
Kconfig KVM: fix direction of dependency on MMU notifiers 2024-01-08 08:09:38 -05:00
kvm_main.c KVM: Add dedicated arch hook for querying if vCPU was preempted in-kernel 2024-02-22 16:26:26 -08:00
kvm_mm.h KVM: Add KVM_CREATE_GUEST_MEMFD ioctl() for guest-specific backing memory 2023-11-14 08:01:03 -05:00
Makefile.kvm KVM: Add KVM_CREATE_GUEST_MEMFD ioctl() for guest-specific backing memory 2023-11-14 08:01:03 -05:00
pfncache.c KVM: Skip unnecessary "unmap" if gpc is already valid during refresh 2022-11-30 19:25:24 +00:00
vfio.c kvm/vfio: avoid bouncing the mutex when adding and deleting groups 2023-08-03 12:01:56 -06:00
vfio.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00