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AJvYcCXQhqWtXRvzx9Z2v75QRSvTiDuzX0hGJabWctA0Bm/1n2AIzqAmVtWDTr7YWQozOd5BGtp8Zu0Emh51A2k=@vger.kernel.org X-Gm-Message-State: AOJu0YyIvPa1rBSVvzlWLzPNq5fCEnRdaWAkD4nc4OBZ6ga5h/c0Yups /k4QcRZmuQ28cnIhZj+cU2o5ETaFslVyQmINfnJMPms4VROeTRrYdXhKnU8IDU4HB4O8W2oaE25 Ezv16nImCDwsxlSKcwRaLvQ== X-Google-Smtp-Source: AGHT+IEinA++oc/gQDS+j3wuYMFfToMe5DnZzzdAdhRTYs5/w3tHItN2vCEdHVa+TZ6bcaADQEZqE25FZvUvHW2b X-Received: from wrbcm4.prod.google.com ([2002:a5d:5f44:0:b0:3a5:648f:da85]) (user=vdonnefort job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6000:2404:b0:3c3:973a:fe3d with SMTP id ffacd0b85a97d-3c497838009mr1125897f8f.59.1755764093978; Thu, 21 Aug 2025 01:14:53 -0700 (PDT) Date: Thu, 21 Aug 2025 09:14:10 +0100 In-Reply-To: <20250821081412.1008261-1-vdonnefort@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250821081412.1008261-1-vdonnefort@google.com> X-Mailer: git-send-email 2.51.0.rc2.233.g662b1ed5c5-goog Message-ID: <20250821081412.1008261-23-vdonnefort@google.com> Subject: [PATCH v6 22/24] KVM: arm64: Add hyp_enter/hyp_exit events to pKVM hyp From: Vincent Donnefort To: rostedt@goodmis.org, mhiramat@kernel.org, mathieu.desnoyers@efficios.com, linux-trace-kernel@vger.kernel.org, maz@kernel.org, oliver.upton@linux.dev, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com Cc: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, jstultz@google.com, qperret@google.com, will@kernel.org, aneesh.kumar@kernel.org, kernel-team@android.com, linux-kernel@vger.kernel.org, Vincent Donnefort Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The hyp_enter and hyp_exit events are logged by the hypervisor any time it is entered and exited. Signed-off-by: Vincent Donnefort diff --git a/arch/arm64/include/asm/kvm_hypevents.h b/arch/arm64/include/as= m/kvm_hypevents.h index d6e033c96c52..ce3953bc884a 100644 --- a/arch/arm64/include/asm/kvm_hypevents.h +++ b/arch/arm64/include/asm/kvm_hypevents.h @@ -7,4 +7,21 @@ #include #endif =20 +HYP_EVENT(hyp_enter, + HE_PROTO(void), + HE_STRUCT( + ), + HE_ASSIGN( + ), + HE_PRINTK() +); + +HYP_EVENT(hyp_exit, + HE_PROTO(void), + HE_STRUCT( + ), + HE_ASSIGN( + ), + HE_PRINTK() +); #endif diff --git a/arch/arm64/kvm/hyp/include/nvhe/arm-smccc.h b/arch/arm64/kvm/h= yp/include/nvhe/arm-smccc.h new file mode 100644 index 000000000000..4b69d33e4f2d --- /dev/null +++ b/arch/arm64/kvm/hyp/include/nvhe/arm-smccc.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include + +#include + +#undef arm_smccc_1_1_smc +#define arm_smccc_1_1_smc(...) \ + do { \ + trace_hyp_exit(); \ + __arm_smccc_1_1(SMCCC_SMC_INST, __VA_ARGS__); \ + trace_hyp_enter(); \ + } while (0) diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c index 3369dd0c4009..e00931fd194f 100644 --- a/arch/arm64/kvm/hyp/nvhe/ffa.c +++ b/arch/arm64/kvm/hyp/nvhe/ffa.c @@ -26,10 +26,10 @@ * the duration and are therefore serialised. */ =20 -#include #include #include =20 +#include #include #include #include diff --git a/arch/arm64/kvm/hyp/nvhe/hyp-main.c b/arch/arm64/kvm/hyp/nvhe/h= yp-main.c index aebed41f7de7..f8361520967b 100644 --- a/arch/arm64/kvm/hyp/nvhe/hyp-main.c +++ b/arch/arm64/kvm/hyp/nvhe/hyp-main.c @@ -12,6 +12,7 @@ #include #include #include +#include #include =20 #include @@ -716,7 +717,9 @@ static void handle_host_hcall(struct kvm_cpu_context *h= ost_ctxt) =20 static void default_host_smc_handler(struct kvm_cpu_context *host_ctxt) { + trace_hyp_exit(); __kvm_hyp_host_forward_smc(host_ctxt); + trace_hyp_enter(); } =20 static void handle_host_smc(struct kvm_cpu_context *host_ctxt) @@ -740,6 +743,8 @@ void handle_trap(struct kvm_cpu_context *host_ctxt) { u64 esr =3D read_sysreg_el2(SYS_ESR); =20 + trace_hyp_enter(); + switch (ESR_ELx_EC(esr)) { case ESR_ELx_EC_HVC64: handle_host_hcall(host_ctxt); @@ -754,4 +759,6 @@ void handle_trap(struct kvm_cpu_context *host_ctxt) default: BUG(); } + + trace_hyp_exit(); } diff --git a/arch/arm64/kvm/hyp/nvhe/psci-relay.c b/arch/arm64/kvm/hyp/nvhe= /psci-relay.c index c3e196fb8b18..64d1d418df1d 100644 --- a/arch/arm64/kvm/hyp/nvhe/psci-relay.c +++ b/arch/arm64/kvm/hyp/nvhe/psci-relay.c @@ -6,11 +6,12 @@ =20 #include #include +#include #include -#include #include #include =20 +#include #include #include =20 @@ -205,6 +206,7 @@ asmlinkage void __noreturn __kvm_host_psci_cpu_entry(bo= ol is_cpu_on) struct psci_boot_args *boot_args; struct kvm_cpu_context *host_ctxt; =20 + trace_hyp_enter(); host_ctxt =3D host_data_ptr(host_ctxt); =20 if (is_cpu_on) @@ -221,6 +223,7 @@ asmlinkage void __noreturn __kvm_host_psci_cpu_entry(bo= ol is_cpu_on) write_sysreg_el1(INIT_SCTLR_EL1_MMU_OFF, SYS_SCTLR); write_sysreg(INIT_PSTATE_EL1, SPSR_EL2); =20 + trace_hyp_exit(); __host_enter(host_ctxt); } =20 diff --git a/arch/arm64/kvm/hyp/nvhe/switch.c b/arch/arm64/kvm/hyp/nvhe/swi= tch.c index ccd575d5f6de..e51f431e8b23 100644 --- a/arch/arm64/kvm/hyp/nvhe/switch.c +++ b/arch/arm64/kvm/hyp/nvhe/switch.c @@ -7,7 +7,6 @@ #include #include =20 -#include #include #include #include @@ -21,6 +20,7 @@ #include #include #include +#include #include #include #include @@ -302,10 +302,13 @@ int __kvm_vcpu_run(struct kvm_vcpu *vcpu) __debug_switch_to_guest(vcpu); =20 do { + trace_hyp_exit(); + /* Jump in the fire! */ exit_code =3D __guest_enter(vcpu); =20 /* And we're baaack! */ + trace_hyp_enter(); } while (fixup_guest_exit(vcpu, &exit_code)); =20 __sysreg_save_state_nvhe(guest_ctxt); --=20 2.51.0.rc2.233.g662b1ed5c5-goog