[PATCH v2 0/2] KVM: x86: Check hypercall's exit to userspace generically
From: Binbin Wu
Date: Tue Aug 13 2024 - 01:11:22 EST
Currently in kvm_emulate_hypercall, KVM_HC_MAP_GPA_RANGE is checked
specifically to decide whether a KVM hypercall needs to exit to userspace
or not. Do the check based on the hypercall_exit_enabled field of
struct kvm_arch.
Also use the API is_kvm_hc_exit_enabled() to replace the opencode.
---
v2:
- Check the return value of __kvm_emulate_hypercall() before checking
hypercall_exit_enabled to avoid an invalid KVM hypercall nr.
https://lore.kernel.org/kvm/184d90a8-14a0-494a-9112-365417245911@xxxxxxxxxxxxxxx/
- Add a warning if a hypercall nr out of the range of hypercall_exit_enabled
can express.
Binbin Wu (2):
KVM: x86: Check hypercall's exit to userspace generically
KVM: x86: Use is_kvm_hc_exit_enabled() instead of opencode
arch/x86/kvm/svm/sev.c | 4 ++--
arch/x86/kvm/x86.c | 6 +++---
arch/x86/kvm/x86.h | 7 +++++++
3 files changed, 12 insertions(+), 5 deletions(-)
base-commit: 332d2c1d713e232e163386c35a3ba0c1b90df83f
--
2.43.2