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From: Oliver Upton <oliver.upton@linux.dev>
To: kvmarm@lists.linux.dev
Cc: Marc Zyngier <maz@kernel.org>, Joey Gouly <joey.gouly@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Zenghui Yu <yuzenghui@huawei.com>,
	Mingwei Zhang <mizhang@google.com>,
	Colton Lewis <coltonlewis@google.com>,
	Raghavendra Rao Ananta <rananta@google.com>,
	James Clark <james.clark@linaro.org>,
	Oliver Upton <oliver.upton@linux.dev>
Subject: [PATCH v3 06/16] KVM: arm64: Clean up KVM_SET_GUEST_DEBUG handler
Date: Mon,  9 Dec 2024 10:09:16 -0800	[thread overview]
Message-ID: <20241209180926.2161373-7-oliver.upton@linux.dev> (raw)
In-Reply-To: <20241209180926.2161373-1-oliver.upton@linux.dev>

No particular reason other than it isn't nice to look at.

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
---
 arch/arm64/kvm/guest.c | 29 +++++++++++------------------
 1 file changed, 11 insertions(+), 18 deletions(-)

diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c
index 12dad841f2a5..1fe097c67766 100644
--- a/arch/arm64/kvm/guest.c
+++ b/arch/arm64/kvm/guest.c
@@ -917,31 +917,24 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 					struct kvm_guest_debug *dbg)
 {
-	int ret = 0;
-
 	trace_kvm_set_guest_debug(vcpu, dbg->control);
 
-	if (dbg->control & ~KVM_GUESTDBG_VALID_MASK) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	if (dbg->control & KVM_GUESTDBG_ENABLE) {
-		vcpu->guest_debug = dbg->control;
-
-		/* Hardware assisted Break and Watch points */
-		if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW) {
-			vcpu->arch.external_debug_state = dbg->arch;
-		}
+	if (dbg->control & ~KVM_GUESTDBG_VALID_MASK)
+		return -EINVAL;
 
-	} else {
-		/* If not enabled clear all flags */
+	if (!(dbg->control & KVM_GUESTDBG_ENABLE)) {
 		vcpu->guest_debug = 0;
 		vcpu_clear_flag(vcpu, DBG_SS_ACTIVE_PENDING);
+		return 0;
 	}
 
-out:
-	return ret;
+	vcpu->guest_debug = dbg->control;
+
+	/* Hardware assisted Break and Watch points */
+	if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW)
+		vcpu->arch.external_debug_state = dbg->arch;
+
+	return 0;
 }
 
 int kvm_arm_vcpu_arch_set_attr(struct kvm_vcpu *vcpu,
-- 
2.39.5


  parent reply	other threads:[~2024-12-09 18:09 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-12-09 18:09 [PATCH v3 00/16] KVM: arm64: Debug cleanups Oliver Upton
2024-12-09 18:09 ` [PATCH v3 01/16] KVM: arm64: Drop MDSCR_EL1_DEBUG_MASK Oliver Upton
2024-12-09 18:09 ` [PATCH v3 02/16] KVM: arm64: Get rid of __kvm_get_mdcr_el2() and related warts Oliver Upton
2024-12-09 18:09 ` [PATCH v3 03/16] KVM: arm64: Track presence of SPE/TRBE in kvm_host_data instead of vCPU Oliver Upton
2024-12-09 18:09 ` [PATCH v3 04/16] KVM: arm64: Move host SME/SVE tracking flags to host data Oliver Upton
2024-12-09 18:09 ` [PATCH v3 05/16] KVM: arm64: Evaluate debug owner at vcpu_load() Oliver Upton
2024-12-09 18:09 ` Oliver Upton [this message]
2024-12-09 18:09 ` [PATCH v3 07/16] KVM: arm64: Select debug state to save/restore based on debug owner Oliver Upton
2024-12-09 18:09 ` [PATCH v3 08/16] KVM: arm64: Remove debug tracepoints Oliver Upton
2024-12-09 18:09 ` [PATCH v3 09/16] KVM: arm64: Remove vestiges of debug_ptr Oliver Upton
2024-12-09 18:09 ` [PATCH v3 10/16] KVM: arm64: Use debug_owner to track if debug regs need save/restore Oliver Upton
2024-12-18 18:11   ` Marc Zyngier
2024-12-18 20:36     ` Oliver Upton
2024-12-09 18:09 ` [PATCH v3 11/16] KVM: arm64: Reload vCPU for accesses to OSLAR_EL1 Oliver Upton
2024-12-09 18:09 ` [PATCH v3 12/16] KVM: arm64: Compute MDCR_EL2 at vcpu_load() Oliver Upton
2024-12-18 18:40   ` Marc Zyngier
2024-12-19 18:00     ` Oliver Upton
2024-12-19 18:16       ` Marc Zyngier
2024-12-09 18:09 ` [PATCH v3 13/16] KVM: arm64: Don't hijack guest context MDSCR_EL1 Oliver Upton
2024-12-09 18:09 ` [PATCH v3 14/16] KVM: arm64: Manage software step state at load/put Oliver Upton
2024-12-09 18:09 ` [PATCH v3 15/16] KVM: arm64: nv: Honor MDCR_EL2.TDE routing for debug exceptions Oliver Upton
2024-12-09 18:09 ` [PATCH v3 16/16] KVM: arm64: Avoid reading ID_AA64DFR0_EL1 for debug save/restore Oliver Upton
2024-12-10 10:30 ` [PATCH v3 00/16] KVM: arm64: Debug cleanups James Clark

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