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Message-Id: <20211111020738.2512932-14-seanjc@google.com>
Date: Thu, 11 Nov 2021 02:07:34 +0000
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>,
Russell King <linux@...linux.org.uk>,
Marc Zyngier <maz@...nel.org>,
Catalin Marinas <catalin.marinas@....com>,
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>,
Dave Hansen <dave.hansen@...ux.intel.com>, 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>,
Like Xu <like.xu@...ux.intel.com>,
Zhu Lingshan <lingshan.zhu@...el.com>
Subject: [PATCH v4 13/17] 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 ec16f645cb8c..621bedff0aa5 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1515,7 +1515,7 @@ 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 36098eb9a7f9..7cb7f261f7dc 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7708,6 +7708,20 @@ 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)
{
@@ -7734,6 +7748,8 @@ 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;
@@ -7892,6 +7908,10 @@ 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();
@@ -7920,7 +7940,7 @@ 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 bafd2e78ad04..a4d25d0587e6 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8410,20 +8410,6 @@ 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)
{
@@ -11116,11 +11102,7 @@ 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;
--
2.34.0.rc0.344.g81b53c2807-goog
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