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Date: Thu, 26 Aug 2021 17:57:14 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Will Deacon <will@...nel.org>, Mark Rutland <mark.rutland@....com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Catalin Marinas <catalin.marinas@....com>,
Marc Zyngier <maz@...nel.org>, Guo Ren <guoren@...nel.org>,
Nick Hu <nickhu@...estech.com>,
Greentime Hu <green.hu@...il.com>,
Vincent Chen <deanbo422@...il.com>,
Paul Walmsley <paul.walmsley@...ive.com>,
Palmer Dabbelt <palmer@...belt.com>,
Albert Ou <aou@...s.berkeley.edu>,
Thomas Gleixner <tglx@...utronix.de>,
Borislav Petkov <bp@...en8.de>, x86@...nel.org,
Paolo Bonzini <pbonzini@...hat.com>,
Boris Ostrovsky <boris.ostrovsky@...cle.com>,
Juergen Gross <jgross@...e.com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...hat.com>,
Namhyung Kim <namhyung@...nel.org>,
James Morse <james.morse@....com>,
Alexandru Elisei <alexandru.elisei@....com>,
Suzuki K Poulose <suzuki.poulose@....com>,
"H. Peter Anvin" <hpa@...or.com>,
Sean Christopherson <seanjc@...gle.com>,
Vitaly Kuznetsov <vkuznets@...hat.com>,
Wanpeng Li <wanpengli@...cent.com>,
Jim Mattson <jmattson@...gle.com>,
Joerg Roedel <joro@...tes.org>,
Stefano Stabellini <sstabellini@...nel.org>,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
linux-csky@...r.kernel.org, linux-riscv@...ts.infradead.org,
kvm@...r.kernel.org, xen-devel@...ts.xenproject.org,
Artem Kashkanov <artem.kashkanov@...el.com>,
Like Xu <like.xu.linux@...il.com>,
Zhu Lingshan <lingshan.zhu@...el.com>
Subject: [PATCH 11/15] KVM: x86: Move Intel Processor Trace interrupt handler
to vmx.c
Now that all state needed for VMX's PT interrupt handler is exposed to
vmx.c (specifically the currently running vCPU), move the handler into
vmx.c where it belongs.
Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
arch/x86/include/asm/kvm_host.h | 1 -
arch/x86/kvm/vmx/vmx.c | 24 +++++++++++++++++++++---
arch/x86/kvm/x86.c | 17 -----------------
virt/kvm/kvm_main.c | 1 +
4 files changed, 22 insertions(+), 21 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 63553a1f43ee..daa33147650a 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1496,7 +1496,6 @@ struct kvm_x86_init_ops {
int (*disabled_by_bios)(void);
int (*check_processor_compatibility)(void);
int (*hardware_setup)(void);
- bool (*intel_pt_intr_in_guest)(void);
struct kvm_x86_ops *runtime_ops;
};
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index f08980ef7c44..4665a272249a 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7535,6 +7535,8 @@ static void vmx_migrate_timers(struct kvm_vcpu *vcpu)
static void hardware_unsetup(void)
{
+ kvm_set_intel_pt_intr_handler(NULL);
+
if (nested)
nested_vmx_hardware_unsetup();
@@ -7685,6 +7687,18 @@ static struct kvm_x86_ops vmx_x86_ops __initdata = {
.vcpu_deliver_sipi_vector = kvm_vcpu_deliver_sipi_vector,
};
+static void vmx_handle_intel_pt_intr(void)
+{
+ struct kvm_vcpu *vcpu = kvm_get_running_vcpu();
+
+ if (WARN_ON_ONCE(!vcpu))
+ return;
+
+ kvm_make_request(KVM_REQ_PMI, vcpu);
+ __set_bit(MSR_CORE_PERF_GLOBAL_OVF_CTRL_TRACE_TOPA_PMI_BIT,
+ (unsigned long *)&vcpu->arch.pmu.global_status);
+}
+
static __init void vmx_setup_user_return_msrs(void)
{
@@ -7886,9 +7900,14 @@ static __init int hardware_setup(void)
vmx_set_cpu_caps();
r = alloc_kvm_area();
- if (r)
+ if (r) {
nested_vmx_hardware_unsetup();
- return r;
+ return r;
+ }
+
+ if (pt_mode == PT_MODE_HOST_GUEST)
+ kvm_set_intel_pt_intr_handler(vmx_handle_intel_pt_intr);
+ return 0;
}
static struct kvm_x86_init_ops vmx_init_ops __initdata = {
@@ -7896,7 +7915,6 @@ static struct kvm_x86_init_ops vmx_init_ops __initdata = {
.disabled_by_bios = vmx_disabled_by_bios,
.check_processor_compatibility = vmx_check_processor_compat,
.hardware_setup = hardware_setup,
- .intel_pt_intr_in_guest = vmx_pt_mode_is_host_guest,
.runtime_ops = &vmx_x86_ops,
};
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 7cb0f04e24ee..11c7a02f839c 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8264,18 +8264,6 @@ static void kvm_timer_init(void)
kvmclock_cpu_online, kvmclock_cpu_down_prep);
}
-static void kvm_handle_intel_pt_intr(void)
-{
- struct kvm_vcpu *vcpu = kvm_get_running_vcpu();
-
- if (WARN_ON_ONCE(!vcpu))
- return;
-
- kvm_make_request(KVM_REQ_PMI, vcpu);
- __set_bit(MSR_CORE_PERF_GLOBAL_OVF_CTRL_TRACE_TOPA_PMI_BIT,
- (unsigned long *)&vcpu->arch.pmu.global_status);
-}
-
#ifdef CONFIG_X86_64
static void pvclock_gtod_update_fn(struct work_struct *work)
{
@@ -11029,9 +11017,6 @@ int kvm_arch_hardware_setup(void *opaque)
memcpy(&kvm_x86_ops, ops->runtime_ops, sizeof(kvm_x86_ops));
kvm_ops_static_call_update();
- if (ops->intel_pt_intr_in_guest && ops->intel_pt_intr_in_guest())
- kvm_set_intel_pt_intr_handler(kvm_handle_intel_pt_intr);
-
if (!kvm_cpu_cap_has(X86_FEATURE_XSAVES))
supported_xss = 0;
@@ -11059,8 +11044,6 @@ int kvm_arch_hardware_setup(void *opaque)
void kvm_arch_hardware_unsetup(void)
{
- kvm_set_intel_pt_intr_handler(NULL);
-
static_call(kvm_x86_hardware_unsetup)();
}
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 13c4f58a75e5..e0b1c9386926 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -5498,6 +5498,7 @@ void kvm_set_intel_pt_intr_handler(void (*handler)(void))
{
kvm_guest_cbs.handle_intel_pt_intr = handler;
}
+EXPORT_SYMBOL_GPL(kvm_set_intel_pt_intr_handler);
void kvm_register_perf_callbacks(void)
{
--
2.33.0.259.gc128427fd7-goog
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