[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH v7 22/51] i386/xen: handle VCPUOP_register_runstate_memory_area
From: |
David Woodhouse |
Subject: |
[PATCH v7 22/51] i386/xen: handle VCPUOP_register_runstate_memory_area |
Date: |
Mon, 16 Jan 2023 21:57:36 +0000 |
From: Joao Martins <joao.m.martins@oracle.com>
Allow guest to setup the vcpu runstates which is used as
steal clock.
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
---
target/i386/cpu.h | 1 +
target/i386/kvm/xen-emu.c | 57 +++++++++++++++++++++++++++++++++++++++
target/i386/machine.c | 1 +
3 files changed, 59 insertions(+)
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 96c2d0d5cb..bf44a87ddb 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -1791,6 +1791,7 @@ typedef struct CPUArchState {
uint64_t xen_vcpu_info_gpa;
uint64_t xen_vcpu_info_default_gpa;
uint64_t xen_vcpu_time_info_gpa;
+ uint64_t xen_vcpu_runstate_gpa;
#endif
#if defined(CONFIG_HVF)
HVFX86LazyFlags hvf_lflags;
diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c
index 4f905eda74..b0ff03dbeb 100644
--- a/target/i386/kvm/xen-emu.c
+++ b/target/i386/kvm/xen-emu.c
@@ -159,6 +159,7 @@ int kvm_xen_init_vcpu(CPUState *cs)
env->xen_vcpu_info_gpa = INVALID_GPA;
env->xen_vcpu_info_default_gpa = INVALID_GPA;
env->xen_vcpu_time_info_gpa = INVALID_GPA;
+ env->xen_vcpu_runstate_gpa = INVALID_GPA;
return 0;
}
@@ -253,6 +254,17 @@ static void do_set_vcpu_time_info_gpa(CPUState *cs,
run_on_cpu_data data)
env->xen_vcpu_time_info_gpa);
}
+static void do_set_vcpu_runstate_gpa(CPUState *cs, run_on_cpu_data data)
+{
+ X86CPU *cpu = X86_CPU(cs);
+ CPUX86State *env = &cpu->env;
+
+ env->xen_vcpu_runstate_gpa = data.host_ulong;
+
+ kvm_xen_set_vcpu_attr(cs, KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADDR,
+ env->xen_vcpu_runstate_gpa);
+}
+
static void do_vcpu_soft_reset(CPUState *cs, run_on_cpu_data data)
{
X86CPU *cpu = X86_CPU(cs);
@@ -261,10 +273,14 @@ static void do_vcpu_soft_reset(CPUState *cs,
run_on_cpu_data data)
env->xen_vcpu_info_gpa = INVALID_GPA;
env->xen_vcpu_info_default_gpa = INVALID_GPA;
env->xen_vcpu_time_info_gpa = INVALID_GPA;
+ env->xen_vcpu_runstate_gpa = INVALID_GPA;
kvm_xen_set_vcpu_attr(cs, KVM_XEN_VCPU_ATTR_TYPE_VCPU_INFO, INVALID_GPA);
kvm_xen_set_vcpu_attr(cs, KVM_XEN_VCPU_ATTR_TYPE_VCPU_TIME_INFO,
INVALID_GPA);
+ kvm_xen_set_vcpu_attr(cs, KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADDR,
+ INVALID_GPA);
+
}
static int xen_set_shared_info(uint64_t gfn)
@@ -514,6 +530,35 @@ static int vcpuop_register_vcpu_time_info(CPUState *cs,
CPUState *target,
return 0;
}
+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;
+
+ /* No need for 32/64 compat handling */
+ qemu_build_assert(sizeof(rma) == 8);
+ /* The runstate area actually does change size, but Linux copes. */
+
+ if (!target) {
+ return -ENOENT;
+ }
+
+ if (kvm_copy_from_gva(cs, arg, &rma, sizeof(rma))) {
+ return -EFAULT;
+ }
+
+ /* As with vcpu_time_info, Xen actually uses the GVA but KVM doesn't. */
+ if (!kvm_gva_to_gpa(cs, rma.addr.p, &gpa, &len, false)) {
+ return -EFAULT;
+ }
+
+ async_run_on_cpu(target, do_set_vcpu_runstate_gpa,
+ RUN_ON_CPU_HOST_ULONG(gpa));
+ return 0;
+}
+
static bool kvm_xen_hcall_vcpu_op(struct kvm_xen_exit *exit, X86CPU *cpu,
int cmd, int vcpu_id, uint64_t arg)
{
@@ -522,6 +567,9 @@ static bool kvm_xen_hcall_vcpu_op(struct kvm_xen_exit
*exit, X86CPU *cpu,
int err;
switch (cmd) {
+ case VCPUOP_register_runstate_memory_area:
+ err = vcpuop_register_runstate_info(cs, dest, arg);
+ break;
case VCPUOP_register_vcpu_time_memory_area:
err = vcpuop_register_vcpu_time_info(cs, dest, arg);
break;
@@ -721,6 +769,15 @@ int kvm_put_xen_state(CPUState *cs)
}
}
+ gpa = env->xen_vcpu_runstate_gpa;
+ if (gpa != INVALID_GPA) {
+ ret = kvm_xen_set_vcpu_attr(cs, KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADDR,
+ gpa);
+ if (ret < 0) {
+ return ret;
+ }
+ }
+
return 0;
}
diff --git a/target/i386/machine.c b/target/i386/machine.c
index eb657907ca..3f3d436aaa 100644
--- a/target/i386/machine.c
+++ b/target/i386/machine.c
@@ -1273,6 +1273,7 @@ static const VMStateDescription vmstate_xen_vcpu = {
VMSTATE_UINT64(env.xen_vcpu_info_gpa, X86CPU),
VMSTATE_UINT64(env.xen_vcpu_info_default_gpa, X86CPU),
VMSTATE_UINT64(env.xen_vcpu_time_info_gpa, X86CPU),
+ VMSTATE_UINT64(env.xen_vcpu_runstate_gpa, X86CPU),
VMSTATE_END_OF_LIST()
}
};
--
2.39.0
- [PATCH v7 42/51] hw/xen: Add xen_gnttab device for grant table emulation, (continued)
- [PATCH v7 42/51] hw/xen: Add xen_gnttab device for grant table emulation, David Woodhouse, 2023/01/16
- [PATCH v7 20/51] i386/xen: handle VCPUOP_register_vcpu_info, David Woodhouse, 2023/01/16
- [PATCH v7 43/51] hw/xen: Support mapping grant frames, David Woodhouse, 2023/01/16
- [PATCH v7 45/51] hw/xen: Implement GNTTABOP_query_size, David Woodhouse, 2023/01/16
- [PATCH v7 50/51] hw/xen: Add xen_xenstore device for xenstore emulation, David Woodhouse, 2023/01/16
- [PATCH v7 15/51] i386/xen: manage and save/restore Xen guest long_mode setting, David Woodhouse, 2023/01/16
- [PATCH v7 51/51] hw/xen: Add basic ring handling to xenstore, David Woodhouse, 2023/01/16
- [PATCH v7 01/51] include: import Xen public headers to include/standard-headers/, David Woodhouse, 2023/01/16
- [PATCH v7 33/51] hw/xen: Implement EVTCHNOP_send, David Woodhouse, 2023/01/16
- [PATCH v7 49/51] hw/xen: Add backend implementation of interdomain event channel support, David Woodhouse, 2023/01/16
- [PATCH v7 22/51] i386/xen: handle VCPUOP_register_runstate_memory_area,
David Woodhouse <=
- [RFC PATCH v7bis 00/19] Emulated Xen PV backend and PIRQ support, David Woodhouse, 2023/01/16
- [RFC PATCH v7bis 13/19] hw/xen: Implement soft reset for emulated gnttab, David Woodhouse, 2023/01/16
- [RFC PATCH v7bis 11/19] hw/xen: Map guest XENSTORE_PFN grant in emulated Xenstore, David Woodhouse, 2023/01/16
- [RFC PATCH v7bis 16/19] i386/xen: Implement HYPERVISOR_physdev_op, David Woodhouse, 2023/01/16
- [RFC PATCH v7bis 03/19] hw/xen: Add gnttab operations to allow redirection to internal emulation, David Woodhouse, 2023/01/16
- [RFC PATCH v7bis 05/19] hw/xen: Add foreignmem operations to allow redirection to internal emulation, David Woodhouse, 2023/01/16
- [RFC PATCH v7bis 17/19] hw/xen: Implement emulated PIRQ hypercall support, David Woodhouse, 2023/01/16
- [RFC PATCH v7bis 08/19] hw/xen: Use XEN_PAGE_SIZE in PV backend drivers, David Woodhouse, 2023/01/16
- [RFC PATCH v7bis 07/19] hw/xen: Move xenstore_store_pv_console_info to xen_console.c, David Woodhouse, 2023/01/16
- [RFC PATCH v7bis 06/19] hw/xen: Add xenstore operations to allow redirection to internal emulation, David Woodhouse, 2023/01/16