shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-07 03:15:31 +09:00
Code Issues Packages Projects Releases Wiki Activity

ANDROID: KVM: arm64: Introduce vcpu_is_protected() helper

Browse Source 
Instead of poking into the internals of the host KVM structure,
stick to the shadow structures when trying to work out whether
a vcpu is part of a protected VM or not.

Take this opportunity to sprinkle a couple of unlikely(), just
because.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Bug: 209580772
Change-Id: I22a096e1e3cfe34cd2658684b02d8bac486416c4
Signed-off-by: Will Deacon <willdeacon@google.com>
This commit is contained in:
Marc Zyngier
2022-01-05 16:01:21 +00:00
committed by Will Deacon
parent c496a48855
commit c0dc717dca
2 changed files with 10 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
arch/arm64/kvm/hyp/include/nvhe/pkvm.h
View File

@@ -52,6 +52,14 @@ struct kvm_shadow_vm {
struct shadow_vcpu_state shadow_vcpus[0];
};
static inline bool vcpu_is_protected(struct kvm_vcpu *vcpu)
{
if (!is_protected_kvm_enabled())
return false;
return vcpu->arch.pkvm.shadow_vm->arch.pkvm.enabled;
}
extern struct kvm_shadow_vm **shadow_table;
extern phys_addr_t pvmfw_base;

6
arch/arm64/kvm/hyp/nvhe/switch.c
View File

@@ -216,7 +216,7 @@ static const exit_handler_fn pvm_exit_handlers[] = {
static const exit_handler_fn *kvm_get_exit_handler_array(struct kvm_vcpu *vcpu)
{
if (unlikely(kvm_vm_is_protected(kern_hyp_va(vcpu->kvm))))
if (unlikely(vcpu_is_protected(vcpu)))
return pvm_exit_handlers;
return hyp_exit_handlers;
@@ -235,9 +235,7 @@ static const exit_handler_fn *kvm_get_exit_handler_array(struct kvm_vcpu *vcpu)
*/
static void early_exit_filter(struct kvm_vcpu *vcpu, u64 *exit_code)
{
struct kvm *kvm = kern_hyp_va(vcpu->kvm);
if (kvm_vm_is_protected(kvm) && vcpu_mode_is_32bit(vcpu)) {
if (unlikely(vcpu_is_protected(vcpu) && vcpu_mode_is_32bit(vcpu))) {
/*
* As we have caught the guest red-handed, decide that it isn't
* fit for purpose anymore by making the vcpu invalid. The VMM