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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v6 18/19] x86/VPMU: Suport for PVH guests
Add support for PVH guests. Most of operations are performed as in an HVM guest.
However, interrupt management is done in PV-like manner.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
Reviewed-by: Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>
Tested-by: Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>
---
xen/arch/x86/hvm/hvm.c | 3 ++-
xen/arch/x86/hvm/svm/vpmu.c | 13 +++++++------
xen/arch/x86/hvm/vmx/vpmu_core2.c | 26 +++++++++++++-------------
xen/arch/x86/hvm/vpmu.c | 32 +++++++++++++++++++++-----------
4 files changed, 43 insertions(+), 31 deletions(-)
diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index ac05160..7773274 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -3607,7 +3607,8 @@ static hvm_hypercall_t *const
pvh_hypercall64_table[NR_hypercalls] = {
[ __HYPERVISOR_physdev_op ] = (hvm_hypercall_t *)hvm_physdev_op,
HYPERCALL(hvm_op),
HYPERCALL(sysctl),
- HYPERCALL(domctl)
+ HYPERCALL(domctl),
+ HYPERCALL(xenpmu_op)
};
int hvm_do_hypercall(struct cpu_user_regs *regs)
diff --git a/xen/arch/x86/hvm/svm/vpmu.c b/xen/arch/x86/hvm/svm/vpmu.c
index 8711e86..dc3a1c9 100644
--- a/xen/arch/x86/hvm/svm/vpmu.c
+++ b/xen/arch/x86/hvm/svm/vpmu.c
@@ -165,6 +165,7 @@ static void amd_vpmu_unset_msr_bitmap(struct vcpu *v)
msr_bitmap_off(vpmu);
}
+/* Must be NMI-safe */
static int amd_vpmu_do_interrupt(struct cpu_user_regs *regs)
{
return 1;
@@ -245,7 +246,7 @@ static int amd_vpmu_save(struct vcpu *v)
context_save(v);
- if ( is_hvm_domain(v->domain) &&
+ if ( has_hvm_container_domain(v->domain) &&
!vpmu_is_set(vpmu, VPMU_RUNNING) && is_msr_bitmap_on(vpmu) )
amd_vpmu_unset_msr_bitmap(v);
@@ -288,7 +289,7 @@ static int amd_vpmu_do_wrmsr(unsigned int msr, uint64_t
msr_content)
struct vpmu_struct *vpmu = vcpu_vpmu(v);
/* For all counters, enable guest only mode for HVM guest */
- if ( is_hvm_domain(v->domain) && (get_pmu_reg_type(msr) == MSR_TYPE_CTRL)
&&
+ if ( has_hvm_container_domain(v->domain) && (get_pmu_reg_type(msr) ==
MSR_TYPE_CTRL) &&
!(is_guest_mode(msr_content)) )
{
set_guest_mode(msr_content);
@@ -302,7 +303,7 @@ static int amd_vpmu_do_wrmsr(unsigned int msr, uint64_t
msr_content)
return 1;
vpmu_set(vpmu, VPMU_RUNNING);
- if ( is_hvm_domain(v->domain) && is_msr_bitmap_on(vpmu) )
+ if ( has_hvm_container_domain(v->domain) && is_msr_bitmap_on(vpmu) )
amd_vpmu_set_msr_bitmap(v);
}
@@ -311,7 +312,7 @@ static int amd_vpmu_do_wrmsr(unsigned int msr, uint64_t
msr_content)
(is_pmu_enabled(msr_content) == 0) && vpmu_is_set(vpmu, VPMU_RUNNING) )
{
vpmu_reset(vpmu, VPMU_RUNNING);
- if ( is_hvm_domain(v->domain) && is_msr_bitmap_on(vpmu) )
+ if ( has_hvm_container_domain(v->domain) && is_msr_bitmap_on(vpmu) )
amd_vpmu_unset_msr_bitmap(v);
release_pmu_ownship(PMU_OWNER_HVM);
}
@@ -382,7 +383,7 @@ static int amd_vpmu_initialise(struct vcpu *v)
}
}
- if ( !is_pv_domain(v->domain) )
+ if ( has_hvm_container_domain(v->domain) )
{
ctxt = xzalloc_bytes(sizeof(struct xen_pmu_amd_ctxt) +
sizeof(uint64_t) * AMD_MAX_COUNTERS +
@@ -414,7 +415,7 @@ static void amd_vpmu_destroy(struct vcpu *v)
if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
return;
- if ( is_hvm_domain(v->domain) )
+ if ( has_hvm_container_domain(v->domain) )
{
if ( is_msr_bitmap_on(vpmu) )
amd_vpmu_unset_msr_bitmap(v);
diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c
b/xen/arch/x86/hvm/vmx/vpmu_core2.c
index c06b305..7dee766 100644
--- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
+++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
@@ -299,7 +299,7 @@ static inline void __core2_vpmu_save(struct vcpu *v)
for ( i = 0; i < arch_pmc_cnt; i++ )
rdmsrl(MSR_IA32_PERFCTR0 + i, xen_pmu_cntr_pair[i].counter);
- if ( is_pv_domain(v->domain) )
+ if ( !has_hvm_container_domain(v->domain) )
rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, core2_vpmu_cxt->global_status);
}
@@ -308,7 +308,7 @@ static int core2_vpmu_save(struct vcpu *v)
{
struct vpmu_struct *vpmu = vcpu_vpmu(v);
- if ( is_pv_domain(v->domain) )
+ if ( !has_hvm_container_domain(v->domain) )
wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);
if ( !vpmu_is_set_all(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED) )
@@ -317,8 +317,8 @@ static int core2_vpmu_save(struct vcpu *v)
__core2_vpmu_save(v);
/* Unset PMU MSR bitmap to trap lazy load. */
- if ( !vpmu_is_set(vpmu, VPMU_RUNNING) && is_hvm_domain(v->domain) &&
- cpu_has_vmx_msr_bitmap )
+ if ( !vpmu_is_set(vpmu, VPMU_RUNNING) &&
+ has_hvm_container_domain(v->domain) && cpu_has_vmx_msr_bitmap )
core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
return 1;
@@ -349,7 +349,7 @@ static inline void __core2_vpmu_load(struct vcpu *v)
wrmsrl(MSR_IA32_DS_AREA, core2_vpmu_cxt->ds_area);
wrmsrl(MSR_IA32_PEBS_ENABLE, core2_vpmu_cxt->pebs_enable);
- if ( is_pv_domain(v->domain) )
+ if ( !has_hvm_container_domain(v->domain) )
{
wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, core2_vpmu_cxt->global_ovf_ctrl);
core2_vpmu_cxt->global_ovf_ctrl = 0;
@@ -445,7 +445,7 @@ static int core2_vpmu_msr_common_check(u32 msr_index, int
*type, int *index)
{
__core2_vpmu_load(current);
vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
- if ( cpu_has_vmx_msr_bitmap && is_hvm_domain(current->domain) )
+ if ( cpu_has_vmx_msr_bitmap &&
has_hvm_container_domain(current->domain) )
core2_vpmu_set_msr_bitmap(current->arch.hvm_vmx.msr_bitmap);
}
return 1;
@@ -453,7 +453,7 @@ static int core2_vpmu_msr_common_check(u32 msr_index, int
*type, int *index)
static void inject_trap(struct vcpu *v, unsigned int trapno)
{
- if ( !is_pv_domain(v->domain) )
+ if ( has_hvm_container_domain(v->domain) )
hvm_inject_hw_exception(trapno, 0);
else
send_guest_trap(v->domain, v->vcpu_id, trapno);
@@ -530,7 +530,7 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t
msr_content)
core2_vpmu_cxt->global_ctrl = msr_content;
break;
case MSR_CORE_PERF_FIXED_CTR_CTRL:
- if ( !is_pv_domain(v->domain) )
+ if ( has_hvm_container_domain(v->domain) )
vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL,
&core2_vpmu_cxt->global_ctrl);
else
@@ -556,7 +556,7 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t
msr_content)
struct xen_pmu_cntr_pair *xen_pmu_cntr_pair =
vpmu_reg_pointer(core2_vpmu_cxt, arch_counters);
- if ( !is_pv_domain(v->domain) )
+ if ( has_hvm_container_domain(v->domain) )
vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL,
&core2_vpmu_cxt->global_ctrl);
else
@@ -610,7 +610,7 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t
msr_content)
}
else
{
- if ( !is_pv_domain(v->domain) )
+ if ( has_hvm_container_domain(v->domain) )
vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
else
wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
@@ -638,7 +638,7 @@ static int core2_vpmu_do_rdmsr(unsigned int msr, uint64_t
*msr_content)
*msr_content = core2_vpmu_cxt->global_status;
break;
case MSR_CORE_PERF_GLOBAL_CTRL:
- if ( !is_pv_domain(v->domain) )
+ if ( has_hvm_container_domain(v->domain) )
vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
else
rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, *msr_content);
@@ -805,7 +805,7 @@ func_out:
check_pmc_quirk();
/* PV domains can allocate resources immediately */
- if ( is_pv_domain(v->domain) && !core2_vpmu_alloc_resource(v) )
+ if ( !has_hvm_container_domain(v->domain) && !core2_vpmu_alloc_resource(v)
)
return 1;
return 0;
@@ -820,7 +820,7 @@ static void core2_vpmu_destroy(struct vcpu *v)
xfree(vpmu->context);
- if ( is_hvm_domain(v->domain) )
+ if ( has_hvm_container_domain(v->domain) )
{
xfree(vpmu->priv_context);
if ( cpu_has_vmx_msr_bitmap )
diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
index f73ebbb..fdafe89 100644
--- a/xen/arch/x86/hvm/vpmu.c
+++ b/xen/arch/x86/hvm/vpmu.c
@@ -105,7 +105,7 @@ void vpmu_lvtpc_update(uint32_t val)
vpmu->hw_lapic_lvtpc = vpmu_interrupt_type | (val & APIC_LVT_MASKED);
/* Postpone APIC updates for PV guests if PMU interrupt is pending */
- if ( !is_pv_domain(current->domain) ||
+ if ( !has_hvm_container_domain(current->domain) ||
!(current->arch.vpmu.xenpmu_data &&
current->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED) )
apic_write(APIC_LVTPC, vpmu->hw_lapic_lvtpc);
@@ -159,7 +159,7 @@ int vpmu_do_msr(unsigned int msr, uint64_t *msr_content,
uint8_t rw)
* and since do_wr/rdmsr may load VPMU context we should save
* (and unload) it again.
*/
- if ( !is_hvm_domain(current->domain) &&
+ if ( !has_hvm_container_domain(current->domain) &&
(current->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED) )
{
vpmu_set(vpmu, VPMU_CONTEXT_SAVE);
@@ -194,13 +194,17 @@ int vpmu_do_interrupt(struct cpu_user_regs *regs)
if ( !is_hvm_domain(v->domain) || (vpmu_mode & XENPMU_MODE_PRIV) )
{
- /* PV guest or dom0 is doing system profiling */
+ /* PV(H) guest or dom0 is doing system profiling */
struct cpu_user_regs *gregs;
int err;
if ( v->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED )
return 1;
+ if ( is_pvh_domain(current->domain) && !(vpmu_mode & XENPMU_MODE_PRIV)
&&
+ !vpmu->arch_vpmu_ops->do_interrupt(regs) )
+ return 0;
+
/* PV guest will be reading PMU MSRs from xenpmu_data */
vpmu_set(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED);
err = vpmu->arch_vpmu_ops->arch_vpmu_save(v);
@@ -237,7 +241,7 @@ int vpmu_do_interrupt(struct cpu_user_regs *regs)
else if ( !is_hardware_domain(current->domain) &&
!is_idle_vcpu(current) )
{
- /* PV guest */
+ /* PV(H) guest */
gregs = guest_cpu_user_regs();
memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
gregs, sizeof(struct cpu_user_regs));
@@ -247,7 +251,15 @@ int vpmu_do_interrupt(struct cpu_user_regs *regs)
regs, sizeof(struct cpu_user_regs));
gregs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
- gregs->cs = (current->arch.flags & TF_kernel_mode) ? 0 : 0x3;
+ if ( !is_pvh_domain(current->domain) )
+ gregs->cs = (current->arch.flags & TF_kernel_mode) ? 0 : 0x3;
+ else if ( !(vpmu_interrupt_type & APIC_DM_NMI) )
+ {
+ struct segment_register seg_cs;
+
+ hvm_get_segment_register(current, x86_seg_cs, &seg_cs);
+ gregs->cs = seg_cs.attr.fields.dpl;
+ }
}
else
{
@@ -271,7 +283,8 @@ int vpmu_do_interrupt(struct cpu_user_regs *regs)
v->arch.vpmu.xenpmu_data->vcpu_id = current->vcpu_id;
v->arch.vpmu.xenpmu_data->pcpu_id = smp_processor_id();
- v->arch.vpmu.xenpmu_data->pmu_flags |= PMU_CACHED;
+ if ( !is_pvh_domain(current->domain) || (vpmu_mode & XENPMU_MODE_PRIV)
)
+ v->arch.vpmu.xenpmu_data->pmu_flags |= PMU_CACHED;
apic_write(APIC_LVTPC, vpmu->hw_lapic_lvtpc | APIC_LVT_MASKED);
vpmu->hw_lapic_lvtpc |= APIC_LVT_MASKED;
@@ -405,7 +418,7 @@ void vpmu_load(struct vcpu *v)
/* Only when PMU is counting, we load PMU context immediately. */
if ( !vpmu_is_set(vpmu, VPMU_RUNNING) ||
- (is_pv_domain(v->domain) && vpmu->xenpmu_data->pmu_flags & PMU_CACHED)
)
+ (!has_hvm_container_domain(v->domain) && vpmu->xenpmu_data->pmu_flags
& PMU_CACHED) )
return;
if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->arch_vpmu_load )
@@ -527,7 +540,7 @@ static void pmu_softnmi(void)
}
regs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
- if ( !is_pv_domain(sampled->domain) )
+ if ( has_hvm_container_domain(sampled->domain) )
{
struct segment_register cs;
@@ -550,9 +563,6 @@ static int pvpmu_init(struct domain *d, xen_pmu_params_t
*params)
uint64_t gfn = params->d.val;
static bool_t __read_mostly pvpmu_initted = 0;
- if ( !is_pv_domain(d) )
- return -EINVAL;
-
if ( params->vcpu < 0 || params->vcpu >= d->max_vcpus )
return -EINVAL;
--
1.8.1.4
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