search for: get_msr

...diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 4d43f5479c0c..8cdb6cece618 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1056,6 +1056,7 @@ struct kvm_x86_ops { void (*update_bp_intercept)(struct kvm_vcpu *vcpu); int (*get_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr); int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr); + bool (*msr_write_intercepted)(struct kvm_vcpu *vcpu, u32 msr); u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg); void (*get_segment)(struct kvm_vcpu *vcpu, struct kvm_s...

...vm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1048,6 +1048,7 @@ struct kvm_x86_ops { void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu); void (*vcpu_put)(struct kvm_vcpu *vcpu); + bool (*bp_intercepted)(struct kvm_vcpu *vcpu); void (*update_bp_intercept)(struct kvm_vcpu *vcpu); int (*get_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr); int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr); diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 122d4ce3b1ab..df34ab0da4ff 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -607,6 +607,13 @@ static inline void clr_ex...

...diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 2136f273645a..d8c61cc301fa 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1060,6 +1060,8 @@ struct kvm_x86_ops { void (*update_bp_intercept)(struct kvm_vcpu *vcpu); int (*get_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr); int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr); + void (*control_msr_intercept)(struct kvm_vcpu *vcpu, unsigned int msr, + int type, bool enable); bool (*msr_write_intercepted)(struct kvm_vcpu *vcpu, u32 msr); u64 (*get_segm...

...diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index a3230ab377db..f04a01dac423 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1110,6 +1110,8 @@ struct kvm_x86_ops { void (*update_bp_intercept)(struct kvm_vcpu *vcpu); int (*get_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr); int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr); + void (*control_msr_intercept)(struct kvm_vcpu *vcpu, unsigned int msr, + int type, bool enable); bool (*msr_write_intercepted)(struct kvm_vcpu *vcpu, u32 msr); u64 (*get_segm...

...>msr, req->enable); return 0; } @@ -872,7 +963,7 @@ static bool __kvmi_msr_event(struct kvm_vcpu *vcpu, struct msr_data *msr) u64 ret_value; u32 action; - if (!test_msr_mask(vcpu, msr->index)) + if (!test_msr_mask(vcpu, msr->index, true)) return true; if (kvm_x86_ops->get_msr(vcpu, &old_msr)) return true; diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 7cd48ef25f59..309a7e5e8b62 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1085,6 +1085,17 @@ static void set_msr_interception(struct kvm_vcpu *vcpu, unsigned long tmp; u32 offset; +#i...

...msrs->nmsrs; + struct msr_data m = {.host_initiated = true}; + int err = 0; + + kvm_arch_vcpu_get_regs(vcpu, regs); + kvm_arch_vcpu_get_sregs(vcpu, sregs); + *mode = kvmi_vcpu_mode(vcpu, sregs); + + for (; msr < end && !err; msr++) { + m.index = msr->index; + + err = kvm_x86_ops.get_msr(vcpu, &m); + + if (!err) + msr->data = m.data; + } + + return err ? -KVM_EINVAL : 0; +} + +static bool valid_reply_size(size_t rpl_size) +{ + size_t msg_size; + + if (check_add_overflow(sizeof(struct kvmi_error_code), + rpl_size, &msg_size)) + return false; + + if (msg_size > K...

...static bool __kvmi_msr_event(struct kvm_vcpu *vcpu, struct msr_data *msr) +{ + struct msr_data old_msr = { + .host_initiated = true, + .index = msr->index, + }; + bool ret = false; + u64 ret_value; + u32 action; + + if (!test_msr_mask(vcpu, msr->index)) + return true; + if (kvm_x86_ops->get_msr(vcpu, &old_msr)) + return true; + if (old_msr.data == msr->data) + return true; + + action = kvmi_send_msr(vcpu, msr->index, old_msr.data, msr->data, + &ret_value); + switch (action) { + case KVMI_EVENT_ACTION_CONTINUE: + msr->data = ret_value; + ret = true; + brea...

...__kvmi_msr_event(struct kvm_vcpu *vcpu, struct msr_data *msr) +{ + struct msr_data old_msr = { + .host_initiated = true, + .index = msr->index, + }; + bool ret = false; + u64 ret_value = msr->data; + u32 action; + + if (!test_msr_mask(vcpu, msr->index)) + return true; + if (kvm_x86_ops.get_msr(vcpu, &old_msr)) + return true; + if (old_msr.data == msr->data) + return true; + + action = kvmi_send_msr(vcpu, msr->index, old_msr.data, msr->data, + &ret_value); + switch (action) { + case KVMI_EVENT_ACTION_CONTINUE: + msr->data = ret_value; + ret = true; + brea...

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VMs (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VMs (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place