From nobody Mon Feb 9 11:28:42 2026 Received: from mail-wr1-f74.google.com (mail-wr1-f74.google.com [209.85.221.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3AC8933A70C for ; Mon, 26 Jan 2026 10:44:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.74 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769424296; cv=none; b=NkrLpC59v0dl5pXP7JdGXDsiMS0o/7KsRsBwCVPQyJSDatOkMmmXzw3YOqqXj46QEu3hI4DcyRwE0hEnyCYEy8+kz+Dcuow/oW2eaOVJY8oj6DcGw7hiddAiiwIRMORT7C9xNrm36PvsUsE1s6ShMLy+Rys2Z7BMItC+aPxqtV4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769424296; c=relaxed/simple; bh=7oIHjiRWSpO5dYLZvgTWL1y/DvoO6BqELjVBzAhC1Ng=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=fA7KTCEeNuFJvHpXiQnxjEQlQpPsf0I05YAzu5QYc+G47lZ41ujf2F0HjpyS5wV0xsadHtXjgS/xm7qLsaDkpq2J4ZD+yiY9CMZGgLJilPzwYpr8ZSyDA/hLjP927oJCVaKa94UWoUfqfykaz57VIPpIGdpPpJ3GGITRQjR87JY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--vdonnefort.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=RTJK2lGp; arc=none smtp.client-ip=209.85.221.74 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--vdonnefort.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="RTJK2lGp" Received: by mail-wr1-f74.google.com with SMTP id ffacd0b85a97d-431054c09e3so2856630f8f.0 for ; Mon, 26 Jan 2026 02:44:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1769424291; x=1770029091; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=AEqvB1DEPUQRm82b56L0jom52EEhc5ZBQ2L02Xcueqo=; b=RTJK2lGpK9ulAW8zJTm11HB8Rp+b3zZP/A97g3uzWIgTjcg8UHsw7sROZJz5lY+YQ5 sdQgpBYE9qqxhHkNjU1611d6dxcGkpb/SMQgjQF84KChCTOo2QR9I7tZo47C8hDJwvNx Vu6Rm4UnM1Sct7hX4CKn6K4uUiPeWMaUro+rHIfZ/XaurIXzY1+zdHmbjsfxPgZ8RAaD wrjT+YWGTea3lYuWn+HGUkOgY+N9Oye4KMgB74zQ/dunCYm0kXtS/+smlVVjtJlnwUi6 76GBYY1xzvImXYL5b9+qBJ23hVHsnHHxtCL9NtL1nwxmmlYO5cjjQ7sItF7Rn4BibTe8 vM4w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1769424291; x=1770029091; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=AEqvB1DEPUQRm82b56L0jom52EEhc5ZBQ2L02Xcueqo=; b=pzum3i2Fd9hcNN4r5QNmBodcOwBHl5jKiaeb57Z9XVF2P6yXZzmBjMZnVAXl9Th472 d8SRj6NmiGAe0MK0g5bltn2h8s2+GovLrC/TJbnSIxz05484C+g69iqoMGxY6DBYOIdN +96qBNiTSJIGP8g4MQuDuHP8Itz1NEdB7MhGcXSdgKU+zFRYDUg+w8w3RZWqd/kO5JU0 fs1YasWW+DTAGwvJ72pFQKyWq0jX7/vYUUX54Sv7cJzKm5XCCZ9vCD/mEjo2OuKxFGe3 kUDMuPf09RhZgcDVcCB0rh+ldF7SzihnPb0ehMxNFeyiL7lL71cYJ2FcuA0b0HqD+S7K PcvQ== X-Forwarded-Encrypted: i=1; AJvYcCXssnGQ2XBobo2T4x8BB31+FvZLDNz0zC9EnCCPrv/LIfvzWFe2jtNuVsci4JwCG+6EKfdUgGroFahdtic=@vger.kernel.org X-Gm-Message-State: AOJu0YxpqTsJh2rF2ertWh7qOZoqzsUD1R9ooJAiO7YSCCLnAVYugbvs iDh5Lny0ttIFSqicgDKZQjvFgT9zbubOrhue7Ex/lypYNWjmuZy/I3Lu7yRjzdB7OIsi+3WaDvX TLDdOoqHBlAGwONVbz6XExg== X-Received: from wrbcp6.prod.google.com ([2002:a05:6000:4006:b0:435:a3c2:4195]) (user=vdonnefort job=prod-delivery.src-stubby-dispatcher) by 2002:a5d:64c4:0:b0:435:9f41:d54 with SMTP id ffacd0b85a97d-435ca1aeca7mr6603755f8f.60.1769424291423; Mon, 26 Jan 2026 02:44:51 -0800 (PST) Date: Mon, 26 Jan 2026 10:44:17 +0000 In-Reply-To: <20260126104419.1649811-1-vdonnefort@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260126104419.1649811-1-vdonnefort@google.com> X-Mailer: git-send-email 2.52.0.457.g6b5491de43-goog Message-ID: <20260126104419.1649811-29-vdonnefort@google.com> Subject: [PATCH v10 28/30] KVM: arm64: Add hyp_enter/hyp_exit events to nVHE/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_host.h b/arch/arm64/include/asm/kvm= _host.h index ac7f970c7883..58f7fe685150 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -896,6 +896,9 @@ struct kvm_vcpu_arch { =20 /* Per-vcpu TLB for VNCR_EL2 -- NULL when !NV */ struct vncr_tlb *vncr_tlb; + + /* Hyp-readable copy of kvm_vcpu::pid */ + pid_t pid; }; =20 /* diff --git a/arch/arm64/include/asm/kvm_hypevents.h b/arch/arm64/include/as= m/kvm_hypevents.h index d6e033c96c52..221a1dacb2f0 100644 --- a/arch/arm64/include/asm/kvm_hypevents.h +++ b/arch/arm64/include/asm/kvm_hypevents.h @@ -7,4 +7,43 @@ #include #endif =20 +#ifndef __HYP_ENTER_EXIT_REASON +#define __HYP_ENTER_EXIT_REASON +enum hyp_enter_exit_reason { + HYP_REASON_SMC, + HYP_REASON_HVC, + HYP_REASON_PSCI, + HYP_REASON_HOST_ABORT, + HYP_REASON_GUEST_EXIT, + HYP_REASON_ERET_HOST, + HYP_REASON_ERET_GUEST, + HYP_REASON_UNKNOWN /* Must be last */ +}; +#endif + +HYP_EVENT(hyp_enter, + HE_PROTO(struct kvm_cpu_context *host_ctxt, u8 reason), + HE_STRUCT( + he_field(u8, reason) + he_field(pid_t, vcpu) + ), + HE_ASSIGN( + __entry->reason =3D reason; + __entry->vcpu =3D __tracing_get_vcpu_pid(host_ctxt); + ), + HE_PRINTK("reason=3D%s vcpu=3D%d", __hyp_enter_exit_reason_str(__entry->r= eason), __entry->vcpu) +); + +HYP_EVENT(hyp_exit, + HE_PROTO(struct kvm_cpu_context *host_ctxt, u8 reason), + HE_STRUCT( + he_field(u8, reason) + he_field(pid_t, vcpu) + ), + HE_ASSIGN( + __entry->reason =3D reason; + __entry->vcpu =3D __tracing_get_vcpu_pid(host_ctxt); + ), + HE_PRINTK("reason=3D%s vcpu=3D%d", __hyp_enter_exit_reason_str(__entry->r= eason), __entry->vcpu) +); #endif diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index f7f222ecaf88..5b7c728c69ca 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -662,6 +662,8 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) =20 if (!cpumask_test_cpu(cpu, vcpu->kvm->arch.supported_cpus)) vcpu_set_on_unsupported_cpu(vcpu); + + vcpu->arch.pid =3D pid_nr(vcpu->pid); } =20 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) 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..1258bc84477f --- /dev/null +++ b/arch/arm64/kvm/hyp/include/nvhe/arm-smccc.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef __ARM64_KVM_HYP_NVHE_ARM_SMCCC_H__ +#define __ARM64_KVM_HYP_NVHE_ARM_SMCCC_H__ + +#include + +#include + +#define hyp_smccc_1_1_smc(...) \ + do { \ + trace_hyp_exit(NULL, HYP_REASON_SMC); \ + arm_smccc_1_1_smc(__VA_ARGS__); \ + trace_hyp_enter(NULL, HYP_REASON_SMC); \ + } while (0) + +#define hyp_smccc_1_2_smc(...) \ + do { \ + trace_hyp_exit(NULL, HYP_REASON_SMC); \ + arm_smccc_1_2_smc(__VA_ARGS__); \ + trace_hyp_enter(NULL, HYP_REASON_SMC); \ + } while (0) + +#endif /* __ARM64_KVM_HYP_NVHE_ARM_SMCCC_H__ */ diff --git a/arch/arm64/kvm/hyp/include/nvhe/trace.h b/arch/arm64/kvm/hyp/i= nclude/nvhe/trace.h index 802a18b77c56..8813ff250f8e 100644 --- a/arch/arm64/kvm/hyp/include/nvhe/trace.h +++ b/arch/arm64/kvm/hyp/include/nvhe/trace.h @@ -6,6 +6,18 @@ =20 #include =20 +static inline pid_t __tracing_get_vcpu_pid(struct kvm_cpu_context *host_ct= xt) +{ + struct kvm_vcpu *vcpu; + + if (!host_ctxt) + host_ctxt =3D host_data_ptr(host_ctxt); + + vcpu =3D host_ctxt->__hyp_running_vcpu; + + return vcpu ? vcpu->arch.pid : 0; +} + #define HE_PROTO(__args...) __args #define HE_ASSIGN(__args...) __args #define HE_STRUCT RE_STRUCT diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c index f731cc4c3f28..ee5d49e733c0 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 @@ -147,7 +147,7 @@ static int ffa_map_hyp_buffers(u64 ffa_page_count) { struct arm_smccc_1_2_regs res; =20 - arm_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { + hyp_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { .a0 =3D FFA_FN64_RXTX_MAP, .a1 =3D hyp_virt_to_phys(hyp_buffers.tx), .a2 =3D hyp_virt_to_phys(hyp_buffers.rx), @@ -161,7 +161,7 @@ static int ffa_unmap_hyp_buffers(void) { struct arm_smccc_1_2_regs res; =20 - arm_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { + hyp_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { .a0 =3D FFA_RXTX_UNMAP, .a1 =3D HOST_FFA_ID, }, &res); @@ -172,7 +172,7 @@ static int ffa_unmap_hyp_buffers(void) static void ffa_mem_frag_tx(struct arm_smccc_1_2_regs *res, u32 handle_lo, u32 handle_hi, u32 fraglen, u32 endpoint_id) { - arm_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { + hyp_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { .a0 =3D FFA_MEM_FRAG_TX, .a1 =3D handle_lo, .a2 =3D handle_hi, @@ -184,7 +184,7 @@ static void ffa_mem_frag_tx(struct arm_smccc_1_2_regs *= res, u32 handle_lo, static void ffa_mem_frag_rx(struct arm_smccc_1_2_regs *res, u32 handle_lo, u32 handle_hi, u32 fragoff) { - arm_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { + hyp_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { .a0 =3D FFA_MEM_FRAG_RX, .a1 =3D handle_lo, .a2 =3D handle_hi, @@ -196,7 +196,7 @@ static void ffa_mem_frag_rx(struct arm_smccc_1_2_regs *= res, u32 handle_lo, static void ffa_mem_xfer(struct arm_smccc_1_2_regs *res, u64 func_id, u32 = len, u32 fraglen) { - arm_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { + hyp_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { .a0 =3D func_id, .a1 =3D len, .a2 =3D fraglen, @@ -206,7 +206,7 @@ static void ffa_mem_xfer(struct arm_smccc_1_2_regs *res= , u64 func_id, u32 len, static void ffa_mem_reclaim(struct arm_smccc_1_2_regs *res, u32 handle_lo, u32 handle_hi, u32 flags) { - arm_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { + hyp_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { .a0 =3D FFA_MEM_RECLAIM, .a1 =3D handle_lo, .a2 =3D handle_hi, @@ -216,7 +216,7 @@ static void ffa_mem_reclaim(struct arm_smccc_1_2_regs *= res, u32 handle_lo, =20 static void ffa_retrieve_req(struct arm_smccc_1_2_regs *res, u32 len) { - arm_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { + hyp_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { .a0 =3D FFA_FN64_MEM_RETRIEVE_REQ, .a1 =3D len, .a2 =3D len, @@ -225,7 +225,7 @@ static void ffa_retrieve_req(struct arm_smccc_1_2_regs = *res, u32 len) =20 static void ffa_rx_release(struct arm_smccc_1_2_regs *res) { - arm_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { + hyp_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { .a0 =3D FFA_RX_RELEASE, }, res); } @@ -728,7 +728,7 @@ static int hyp_ffa_post_init(void) size_t min_rxtx_sz; struct arm_smccc_1_2_regs res; =20 - arm_smccc_1_2_smc(&(struct arm_smccc_1_2_regs){ + hyp_smccc_1_2_smc(&(struct arm_smccc_1_2_regs){ .a0 =3D FFA_ID_GET, }, &res); if (res.a0 !=3D FFA_SUCCESS) @@ -737,7 +737,7 @@ static int hyp_ffa_post_init(void) if (res.a2 !=3D HOST_FFA_ID) return -EINVAL; =20 - arm_smccc_1_2_smc(&(struct arm_smccc_1_2_regs){ + hyp_smccc_1_2_smc(&(struct arm_smccc_1_2_regs){ .a0 =3D FFA_FEATURES, .a1 =3D FFA_FN64_RXTX_MAP, }, &res); @@ -788,7 +788,7 @@ static void do_ffa_version(struct arm_smccc_1_2_regs *r= es, * first if TEE supports it. */ if (FFA_MINOR_VERSION(ffa_req_version) < FFA_MINOR_VERSION(hyp_ffa_versio= n)) { - arm_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { + hyp_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { .a0 =3D FFA_VERSION, .a1 =3D ffa_req_version, }, res); @@ -824,7 +824,7 @@ static void do_ffa_part_get(struct arm_smccc_1_2_regs *= res, goto out_unlock; } =20 - arm_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { + hyp_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { .a0 =3D FFA_PARTITION_INFO_GET, .a1 =3D uuid0, .a2 =3D uuid1, @@ -939,7 +939,7 @@ int hyp_ffa_init(void *pages) if (kvm_host_psci_config.smccc_version < ARM_SMCCC_VERSION_1_2) return 0; =20 - arm_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { + hyp_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) { .a0 =3D FFA_VERSION, .a1 =3D FFA_VERSION_1_2, }, &res); diff --git a/arch/arm64/kvm/hyp/nvhe/hyp-main.c b/arch/arm64/kvm/hyp/nvhe/h= yp-main.c index 7f5b9807c42d..e1d4a53260ff 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 @@ -137,6 +138,8 @@ static void flush_hyp_vcpu(struct pkvm_hyp_vcpu *hyp_vc= pu) hyp_vcpu->vcpu.arch.vsesr_el2 =3D host_vcpu->arch.vsesr_el2; =20 hyp_vcpu->vcpu.arch.vgic_cpu.vgic_v3 =3D host_vcpu->arch.vgic_cpu.vgic_v3; + + hyp_vcpu->vcpu.arch.pid =3D host_vcpu->arch.pid; } =20 static void sync_hyp_vcpu(struct pkvm_hyp_vcpu *hyp_vcpu) @@ -728,7 +731,9 @@ 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(host_ctxt, HYP_REASON_SMC); __kvm_hyp_host_forward_smc(host_ctxt); + trace_hyp_enter(host_ctxt, HYP_REASON_SMC); } =20 static void handle_host_smc(struct kvm_cpu_context *host_ctxt) @@ -752,18 +757,24 @@ void handle_trap(struct kvm_cpu_context *host_ctxt) { u64 esr =3D read_sysreg_el2(SYS_ESR); =20 + switch (ESR_ELx_EC(esr)) { case ESR_ELx_EC_HVC64: + trace_hyp_enter(host_ctxt, HYP_REASON_HVC); handle_host_hcall(host_ctxt); break; case ESR_ELx_EC_SMC64: + trace_hyp_enter(host_ctxt, HYP_REASON_SMC); handle_host_smc(host_ctxt); break; case ESR_ELx_EC_IABT_LOW: case ESR_ELx_EC_DABT_LOW: + trace_hyp_enter(host_ctxt, HYP_REASON_HOST_ABORT); handle_host_mem_abort(host_ctxt); break; default: BUG(); } + + trace_hyp_exit(host_ctxt, HYP_REASON_ERET_HOST); } diff --git a/arch/arm64/kvm/hyp/nvhe/psci-relay.c b/arch/arm64/kvm/hyp/nvhe= /psci-relay.c index c3e196fb8b18..ab4c7bddb163 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 @@ -65,7 +66,7 @@ static unsigned long psci_call(unsigned long fn, unsigned= long arg0, { struct arm_smccc_res res; =20 - arm_smccc_1_1_smc(fn, arg0, arg1, arg2, &res); + hyp_smccc_1_1_smc(fn, arg0, arg1, arg2, &res); return res.a0; } =20 @@ -206,6 +207,7 @@ asmlinkage void __noreturn __kvm_host_psci_cpu_entry(bo= ol is_cpu_on) struct kvm_cpu_context *host_ctxt; =20 host_ctxt =3D host_data_ptr(host_ctxt); + trace_hyp_enter(host_ctxt, HYP_REASON_PSCI); =20 if (is_cpu_on) boot_args =3D this_cpu_ptr(&cpu_on_args); @@ -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_ctxt, HYP_REASON_PSCI); __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 779089e42681..ca60721501d1 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 @@ -308,10 +308,13 @@ int __kvm_vcpu_run(struct kvm_vcpu *vcpu) __debug_switch_to_guest(vcpu); =20 do { + trace_hyp_exit(host_ctxt, HYP_REASON_ERET_GUEST); + /* Jump in the fire! */ exit_code =3D __guest_enter(vcpu); =20 /* And we're baaack! */ + trace_hyp_enter(host_ctxt, HYP_REASON_GUEST_EXIT); } while (fixup_guest_exit(vcpu, &exit_code)); =20 __sysreg_save_state_nvhe(guest_ctxt); diff --git a/arch/arm64/kvm/hyp_trace.c b/arch/arm64/kvm/hyp_trace.c index 0144cd26703e..1ad6a55ba95c 100644 --- a/arch/arm64/kvm/hyp_trace.c +++ b/arch/arm64/kvm/hyp_trace.c @@ -364,8 +364,26 @@ static struct trace_remote_callbacks trace_remote_call= backs =3D { .enable_event =3D hyp_trace_enable_event, }; =20 +static const char *__hyp_enter_exit_reason_str(u8 reason); + #include =20 +static const char *__hyp_enter_exit_reason_str(u8 reason) +{ + static const char strs[][12] =3D { + "smc", + "hvc", + "psci", + "host_abort", + "guest_exit", + "eret_host", + "eret_guest", + "unknown", + }; + + return strs[min(reason, HYP_REASON_UNKNOWN)]; +} + static void __init hyp_trace_init_events(void) { struct hyp_event_id *hyp_event_id =3D __hyp_event_ids_start; --=20 2.52.0.457.g6b5491de43-goog