On 09/12/2022 09:56, David Woodhouse wrote:
From: Joao Martins <joao.m.mart...@oracle.com>
Allow guest to setup the vcpu runstates which is used as
steal clock.
Signed-off-by: Joao Martins <joao.m.mart...@oracle.com>
Signed-off-by: David Woodhouse <d...@amazon.co.uk>
---
target/i386/cpu.h | 1 +
target/i386/kvm/kvm.c | 9 +++++++++
target/i386/machine.c | 4 +++-
target/i386/xen.c | 35 +++++++++++++++++++++++++++++++++++
4 files changed, 48 insertions(+), 1 deletion(-)
[snip]
+static int vcpuop_register_runstate_info(CPUState *cs, CPUState *target,
+ uint64_t arg)
+{
+ struct vcpu_register_runstate_memory_area rma;
+ uint64_t gpa;
+ size_t len;
+
+ if (kvm_copy_from_gva(cs, arg, &rma, sizeof(*rma.addr.v))) {
+ return -EFAULT;
+ }
+
+ if (!kvm_gva_to_gpa(cs, rma.addr.p, &gpa, &len, false) ||
+ len < sizeof(struct vcpu_time_info)) {
+ return -EFAULT;
+ }
Again, Xen stashes the GVA for this and not the GPA.
Paul
