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Tue, 11 Feb 2020 17:50:26 +0000 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Subject: [PATCH v2 56/94] KVM: arm64: nv: Add nested GICv3 tracepoints Date: Tue, 11 Feb 2020 17:49:00 +0000 Message-Id: <20200211174938.27809-57-maz@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200211174938.27809-1-maz@kernel.org> References: <20200211174938.27809-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, andre.przywara@arm.com, christoffer.dall@arm.com, Dave.Martin@arm.com, jintack@cs.columbia.edu, alexandru.elisei@arm.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200211_095244_945399_A38F129D X-CRM114-Status: GOOD ( 15.83 ) X-Spam-Score: -5.2 (-----) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-5.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [198.145.29.99 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Suzuki K Poulose , Andre Przywara , Christoffer Dall , Dave Martin , James Morse , Alexandru Elisei , Jintack Lim , Julien Thierry Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Christoffer Dall Adding tracepoints to be able to peek into the shadow LRs used when running a guest guest. Signed-off-by: Christoffer Dall Signed-off-by: Marc Zyngier --- virt/kvm/arm/vgic/vgic-nested-trace.h | 137 ++++++++++++++++++++++++++ virt/kvm/arm/vgic/vgic-v3-nested.c | 13 ++- 2 files changed, 149 insertions(+), 1 deletion(-) create mode 100644 virt/kvm/arm/vgic/vgic-nested-trace.h diff --git a/virt/kvm/arm/vgic/vgic-nested-trace.h b/virt/kvm/arm/vgic/vgic-nested-trace.h new file mode 100644 index 000000000000..69f4ec031e7c --- /dev/null +++ b/virt/kvm/arm/vgic/vgic-nested-trace.h @@ -0,0 +1,137 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#if !defined(_TRACE_VGIC_NESTED_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_VGIC_NESTED_H + +#include + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM kvm + +#define SLR_ENTRY_VALS(x) \ + " ", \ + !!(__entry->lrs[x] & ICH_LR_HW), \ + !!(__entry->lrs[x] & ICH_LR_PENDING_BIT), \ + !!(__entry->lrs[x] & ICH_LR_ACTIVE_BIT), \ + __entry->lrs[x] & ICH_LR_VIRTUAL_ID_MASK, \ + (__entry->lrs[x] & ICH_LR_PHYS_ID_MASK) >> ICH_LR_PHYS_ID_SHIFT, \ + (__entry->orig_lrs[x] & ICH_LR_PHYS_ID_MASK) >> ICH_LR_PHYS_ID_SHIFT + +TRACE_EVENT(vgic_create_shadow_lrs, + TP_PROTO(struct kvm_vcpu *vcpu, int nr_lr, u64 *lrs, u64 *orig_lrs), + TP_ARGS(vcpu, nr_lr, lrs, orig_lrs), + + TP_STRUCT__entry( + __field( int, nr_lr ) + __array( u64, lrs, 16 ) + __array( u64, orig_lrs, 16 ) + ), + + TP_fast_assign( + __entry->nr_lr = nr_lr; + memcpy(__entry->lrs, lrs, 16 * sizeof(u64)); + memcpy(__entry->orig_lrs, orig_lrs, 16 * sizeof(u64)); + ), + + TP_printk("nr_lr: %d\n" + "%50sLR[ 0]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu (%5llu)\n" + "%50sLR[ 1]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu (%5llu)\n" + "%50sLR[ 2]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu (%5llu)\n" + "%50sLR[ 3]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu (%5llu)\n" + "%50sLR[ 4]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu (%5llu)\n" + "%50sLR[ 5]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu (%5llu)\n" + "%50sLR[ 6]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu (%5llu)\n" + "%50sLR[ 7]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu (%5llu)\n" + "%50sLR[ 8]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu (%5llu)\n" + "%50sLR[ 9]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu (%5llu)\n" + "%50sLR[10]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu (%5llu)\n" + "%50sLR[11]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu (%5llu)\n" + "%50sLR[12]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu (%5llu)\n" + "%50sLR[13]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu (%5llu)\n" + "%50sLR[14]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu (%5llu)\n" + "%50sLR[15]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu (%5llu)", + __entry->nr_lr, + SLR_ENTRY_VALS(0), SLR_ENTRY_VALS(1), SLR_ENTRY_VALS(2), + SLR_ENTRY_VALS(3), SLR_ENTRY_VALS(4), SLR_ENTRY_VALS(5), + SLR_ENTRY_VALS(6), SLR_ENTRY_VALS(7), SLR_ENTRY_VALS(8), + SLR_ENTRY_VALS(9), SLR_ENTRY_VALS(10), SLR_ENTRY_VALS(11), + SLR_ENTRY_VALS(12), SLR_ENTRY_VALS(13), SLR_ENTRY_VALS(14), + SLR_ENTRY_VALS(15)) +); + +#define LR_ENTRY_VALS(x) \ + " ", \ + !!(__entry->lrs[x] & ICH_LR_HW), \ + !!(__entry->lrs[x] & ICH_LR_PENDING_BIT), \ + !!(__entry->lrs[x] & ICH_LR_ACTIVE_BIT), \ + __entry->lrs[x] & ICH_LR_VIRTUAL_ID_MASK, \ + (__entry->lrs[x] & ICH_LR_PHYS_ID_MASK) >> ICH_LR_PHYS_ID_SHIFT + +TRACE_EVENT(vgic_put_nested, + TP_PROTO(struct kvm_vcpu *vcpu, int nr_lr, u64 *lrs), + TP_ARGS(vcpu, nr_lr, lrs), + + TP_STRUCT__entry( + __field( int, nr_lr ) + __array( u64, lrs, 16 ) + ), + + TP_fast_assign( + __entry->nr_lr = nr_lr; + memcpy(__entry->lrs, lrs, 16 * sizeof(u64)); + ), + + TP_printk("nr_lr: %d\n" + "%50sLR[ 0]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu\n" + "%50sLR[ 1]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu\n" + "%50sLR[ 2]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu\n" + "%50sLR[ 3]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu\n" + "%50sLR[ 4]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu\n" + "%50sLR[ 5]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu\n" + "%50sLR[ 6]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu\n" + "%50sLR[ 7]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu\n" + "%50sLR[ 8]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu\n" + "%50sLR[ 9]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu\n" + "%50sLR[10]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu\n" + "%50sLR[11]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu\n" + "%50sLR[12]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu\n" + "%50sLR[13]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu\n" + "%50sLR[14]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu\n" + "%50sLR[15]: HW: %d P: %d: A: %d vINTID: %5llu pINTID: %5llu", + __entry->nr_lr, + LR_ENTRY_VALS(0), LR_ENTRY_VALS(1), LR_ENTRY_VALS(2), + LR_ENTRY_VALS(3), LR_ENTRY_VALS(4), LR_ENTRY_VALS(5), + LR_ENTRY_VALS(6), LR_ENTRY_VALS(7), LR_ENTRY_VALS(8), + LR_ENTRY_VALS(9), LR_ENTRY_VALS(10), LR_ENTRY_VALS(11), + LR_ENTRY_VALS(12), LR_ENTRY_VALS(13), LR_ENTRY_VALS(14), + LR_ENTRY_VALS(15)) +); + +TRACE_EVENT(vgic_nested_hw_emulate, + TP_PROTO(int lr, u64 lr_val, u32 l1_intid), + TP_ARGS(lr, lr_val, l1_intid), + + TP_STRUCT__entry( + __field( int, lr ) + __field( u64, lr_val ) + __field( u32, l1_intid ) + ), + + TP_fast_assign( + __entry->lr = lr; + __entry->lr_val = lr_val; + __entry->l1_intid = l1_intid; + ), + + TP_printk("lr: %d LR %llx L1 INTID: %u\n", + __entry->lr, __entry->lr_val, __entry->l1_intid) +); + +#endif /* _TRACE_VGIC_NESTED_H */ + +#undef TRACE_INCLUDE_PATH +#define TRACE_INCLUDE_PATH ../../../virt/kvm/arm/vgic +#undef TRACE_INCLUDE_FILE +#define TRACE_INCLUDE_FILE vgic-nested-trace + +/* This part must be outside protection */ +#include diff --git a/virt/kvm/arm/vgic/vgic-v3-nested.c b/virt/kvm/arm/vgic/vgic-v3-nested.c index 4ba426e2324d..94b1edb67011 100644 --- a/virt/kvm/arm/vgic/vgic-v3-nested.c +++ b/virt/kvm/arm/vgic/vgic-v3-nested.c @@ -13,6 +13,9 @@ #include "vgic.h" +#define CREATE_TRACE_POINTS +#include "vgic-nested-trace.h" + static inline struct vgic_v3_cpu_if *vcpu_nested_if(struct kvm_vcpu *vcpu) { return &vcpu->arch.vgic_cpu.nested_vgic_v3; @@ -119,6 +122,9 @@ static void vgic_v3_create_shadow_lr(struct kvm_vcpu *vcpu) used_lrs = i + 1; } + trace_vgic_create_shadow_lrs(vcpu, kvm_vgic_global_state.nr_lr, + s_cpu_if->vgic_lr, cpu_if->vgic_lr); + s_cpu_if->used_lrs = used_lrs; } @@ -163,8 +169,10 @@ void vgic_v3_sync_nested(struct kvm_vcpu *vcpu) continue; /* oh well, the guest hyp is broken */ lr = __gic_v3_get_lr(i); - if (!(lr & ICH_LR_STATE)) + if (!(lr & ICH_LR_STATE)) { + trace_vgic_nested_hw_emulate(i, lr, l1_irq); irq->active = false; + } vgic_put_irq(vcpu->kvm, irq); } @@ -195,6 +203,9 @@ void vgic_v3_put_nested(struct kvm_vcpu *vcpu) __vgic_v3_save_state(vcpu_shadow_if(vcpu)); + trace_vgic_put_nested(vcpu, kvm_vgic_global_state.nr_lr, + vcpu_shadow_if(vcpu)->vgic_lr); + /* * Translate the shadow state HW fields back to the virtual ones * before copying the shadow struct back to the nested one.