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Open Source and information security mailing list archives
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Date: Tue, 21 Sep 2021 17:05:30 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Will Deacon <will@...nel.org>,
Mark Rutland <mark.rutland@....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>,
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>,
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-arm-kernel@...ts.infradead.org,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.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 v3 13/16] 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 | 2 +-
arch/x86/kvm/vmx/vmx.c | 22 +++++++++++++++++++++-
arch/x86/kvm/x86.c | 20 +-------------------
3 files changed, 23 insertions(+), 21 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 6efe4e03a6d2..d40814b57ae8 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1495,7 +1495,7 @@ 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);
+ unsigned int (*handle_intel_pt_intr)(void);
struct kvm_x86_ops *runtime_ops;
};
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 61a4f5ff2acd..33f92febe3ce 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7687,6 +7687,20 @@ static struct kvm_x86_ops vmx_x86_ops __initdata = {
.vcpu_deliver_sipi_vector = kvm_vcpu_deliver_sipi_vector,
};
+static unsigned int vmx_handle_intel_pt_intr(void)
+{
+ struct kvm_vcpu *vcpu = kvm_get_running_vcpu();
+
+ /* '0' on failure so that the !PT case can use a RET0 static call. */
+ if (!kvm_arch_pmi_in_guest(vcpu))
+ return 0;
+
+ 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);
+ return 1;
+}
+
static __init void vmx_setup_user_return_msrs(void)
{
@@ -7713,6 +7727,8 @@ static __init void vmx_setup_user_return_msrs(void)
kvm_add_user_return_msr(vmx_uret_msrs_list[i]);
}
+static struct kvm_x86_init_ops vmx_init_ops __initdata;
+
static __init int hardware_setup(void)
{
unsigned long host_bndcfgs;
@@ -7873,6 +7889,10 @@ static __init int hardware_setup(void)
return -EINVAL;
if (!enable_ept || !cpu_has_vmx_intel_pt())
pt_mode = PT_MODE_SYSTEM;
+ if (pt_mode == PT_MODE_HOST_GUEST)
+ vmx_init_ops.handle_intel_pt_intr = vmx_handle_intel_pt_intr;
+ else
+ vmx_init_ops.handle_intel_pt_intr = NULL;
setup_default_sgx_lepubkeyhash();
@@ -7898,7 +7918,7 @@ 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,
+ .handle_intel_pt_intr = NULL,
.runtime_ops = &vmx_x86_ops,
};
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 1bea616402e6..b79b2d29260d 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8264,20 +8264,6 @@ static void kvm_timer_init(void)
kvmclock_cpu_online, kvmclock_cpu_down_prep);
}
-static unsigned int kvm_handle_intel_pt_intr(void)
-{
- struct kvm_vcpu *vcpu = kvm_get_running_vcpu();
-
- /* '0' on failure so that the !PT case can use a RET0 static call. */
- if (!kvm_arch_pmi_in_guest(vcpu))
- return 0;
-
- 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);
- return 1;
-}
-
#ifdef CONFIG_X86_64
static void pvclock_gtod_update_fn(struct work_struct *work)
{
@@ -11031,11 +11017,7 @@ int kvm_arch_hardware_setup(void *opaque)
memcpy(&kvm_x86_ops, ops->runtime_ops, sizeof(kvm_x86_ops));
kvm_ops_static_call_update();
- /* Temporary ugliness. */
- if (ops->intel_pt_intr_in_guest && ops->intel_pt_intr_in_guest())
- kvm_register_perf_callbacks(kvm_handle_intel_pt_intr);
- else
- kvm_register_perf_callbacks(NULL);
+ kvm_register_perf_callbacks(ops->handle_intel_pt_intr);
if (!kvm_cpu_cap_has(X86_FEATURE_XSAVES))
supported_xss = 0;
--
2.33.0.464.g1972c5931b-goog
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