Displaying 3 results from an estimated 3 matches for "emulator_read_emul".
2019 Aug 09
0
[RFC PATCH v6 74/92] kvm: x86: do not unconditionally patch the hypercall instruction during emulation
...RCALL_INSN_LEN 3
+
static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt)
{
+ int err;
struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
- char instruction[3];
+ char buf[KVM_HYPERCALL_INSN_LEN];
+ char instruction[KVM_HYPERCALL_INSN_LEN];
unsigned long rip = kvm_rip_read(vcpu);
+ err = emulator_read_emulated(ctxt, rip, buf, sizeof(buf),
+ &ctxt->exception);
+ if (err != X86EMUL_CONTINUE)
+ return err;
+
kvm_x86_ops->patch_hypercall(vcpu, instruction);
+ if (!memcmp(instruction, buf, sizeof(instruction)))
+ /*
+ * The hypercall instruction is the correct one. Retry
+ * its...
2019 Aug 09
117
[RFC PATCH v6 00/92] VM introspection
The KVM introspection subsystem provides a facility for applications running
on the host or in a separate VM, to control the execution of other VM-s
(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
2019 Aug 09
117
[RFC PATCH v6 00/92] VM introspection
The KVM introspection subsystem provides a facility for applications running
on the host or in a separate VM, to control the execution of other VM-s
(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