public inbox for linux-arm-kernel@lists.infradead.org
 help / color / mirror / Atom feed
From: Marc Zyngier <maz@kernel.org>
To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org
Cc: Joey Gouly <joey.gouly@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Oliver Upton <oupton@kernel.org>,
	Zenghui Yu <yuzenghui@huawei.com>,
	Sascha Bischoff <sascha.bischoff@arm.com>
Subject: [PATCH 03/18] KVM: arm64: vgic-v5: Remove use of __assign_bit() with a constant
Date: Wed, 15 Apr 2026 12:55:44 +0100	[thread overview]
Message-ID: <20260415115559.2227718-4-maz@kernel.org> (raw)
In-Reply-To: <20260415115559.2227718-1-maz@kernel.org>

Using __assign_bit() is very useful when the value of the bit is
not known at compile time. In all other cases, __set_bit() and
__clear_bit() are the correct tool for the job.

This also fixes an odd case of using VGIC_V5_NR_PRIVATE_IRQS as
the bit value...

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/kvm/vgic/vgic-v5.c | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/arch/arm64/kvm/vgic/vgic-v5.c b/arch/arm64/kvm/vgic/vgic-v5.c
index 7c146fccc9689..4d62b1c31fe8b 100644
--- a/arch/arm64/kvm/vgic/vgic-v5.c
+++ b/arch/arm64/kvm/vgic/vgic-v5.c
@@ -25,13 +25,13 @@ static void vgic_v5_get_implemented_ppis(void)
 	 * If we have KVM, we have EL2, which means that we have support for the
 	 * EL1 and EL2 Physical & Virtual timers.
 	 */
-	__assign_bit(GICV5_ARCH_PPI_CNTHP, ppi_caps.impl_ppi_mask, 1);
-	__assign_bit(GICV5_ARCH_PPI_CNTV, ppi_caps.impl_ppi_mask, 1);
-	__assign_bit(GICV5_ARCH_PPI_CNTHV, ppi_caps.impl_ppi_mask, 1);
-	__assign_bit(GICV5_ARCH_PPI_CNTP, ppi_caps.impl_ppi_mask, 1);
+	__set_bit(GICV5_ARCH_PPI_CNTHP, ppi_caps.impl_ppi_mask);
+	__set_bit(GICV5_ARCH_PPI_CNTV, ppi_caps.impl_ppi_mask);
+	__set_bit(GICV5_ARCH_PPI_CNTHV, ppi_caps.impl_ppi_mask);
+	__set_bit(GICV5_ARCH_PPI_CNTP, ppi_caps.impl_ppi_mask);
 
 	/* The SW_PPI should be available */
-	__assign_bit(GICV5_ARCH_PPI_SW_PPI, ppi_caps.impl_ppi_mask, 1);
+	__set_bit(GICV5_ARCH_PPI_SW_PPI, ppi_caps.impl_ppi_mask);
 
 	/* The PMUIRQ is available if we have the PMU */
 	__assign_bit(GICV5_ARCH_PPI_PMUIRQ, ppi_caps.impl_ppi_mask, system_supports_pmuv3());
@@ -146,9 +146,7 @@ int vgic_v5_init(struct kvm *kvm)
 	/* We only allow userspace to drive the SW_PPI, if it is implemented. */
 	bitmap_zero(kvm->arch.vgic.gicv5_vm.userspace_ppis,
 		    VGIC_V5_NR_PRIVATE_IRQS);
-	__assign_bit(GICV5_ARCH_PPI_SW_PPI,
-		     kvm->arch.vgic.gicv5_vm.userspace_ppis,
-		     VGIC_V5_NR_PRIVATE_IRQS);
+	__set_bit(GICV5_ARCH_PPI_SW_PPI, kvm->arch.vgic.gicv5_vm.userspace_ppis);
 	bitmap_and(kvm->arch.vgic.gicv5_vm.userspace_ppis,
 		   kvm->arch.vgic.gicv5_vm.userspace_ppis,
 		   ppi_caps.impl_ppi_mask, VGIC_V5_NR_PRIVATE_IRQS);
@@ -197,7 +195,7 @@ int vgic_v5_finalize_ppi_state(struct kvm *kvm)
 		/* Expose PPIs with an owner or the SW_PPI, only */
 		scoped_guard(raw_spinlock_irqsave, &irq->irq_lock) {
 			if (irq->owner || i == GICV5_ARCH_PPI_SW_PPI) {
-				__assign_bit(i, kvm->arch.vgic.gicv5_vm.vgic_ppi_mask, 1);
+				__set_bit(i, kvm->arch.vgic.gicv5_vm.vgic_ppi_mask);
 				__assign_bit(i, kvm->arch.vgic.gicv5_vm.vgic_ppi_hmr,
 					     irq->config == VGIC_CONFIG_LEVEL);
 			}
-- 
2.47.3



  parent reply	other threads:[~2026-04-15 11:56 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-04-15 11:55 [PATCH 00/18] KVM: arm64: Second batch of vgic fixes for 7.1 Marc Zyngier
2026-04-15 11:55 ` [PATCH 01/18] KVM: arm64: vgic-v5: Add for_each_visible_v5_ppi() iterator Marc Zyngier
2026-04-15 11:55 ` [PATCH 02/18] KVM: arm64: vgic-v5: Move PPI caps into kvm_vgic_global_state Marc Zyngier
2026-04-15 11:55 ` Marc Zyngier [this message]
2026-04-15 11:55 ` [PATCH 04/18] KVM: arm64: vgic-v5: Drop pointless ARM64_HAS_GICV5_CPUIF check Marc Zyngier
2026-04-15 11:55 ` [PATCH 05/18] KVM: arm64: vgic: Constify struct irq_ops usage Marc Zyngier
2026-04-15 11:55 ` [PATCH 06/18] KVM: arm64: vgic: Consolidate vgic_allocate_private_irqs_locked() Marc Zyngier
2026-04-15 11:55 ` [PATCH 07/18] KVM: arm64: vgic-v5: Drop defensive checks from vgic_v5_ppi_queue_irq_unlock() Marc Zyngier
2026-04-15 11:55 ` [PATCH 08/18] KVM: arm64: vgic: Rationalise per-CPU irq accessor Marc Zyngier
2026-04-17 15:21   ` Joey Gouly
2026-04-15 11:55 ` [PATCH 09/18] KVM: arm64: vgic-v5: Limit support to 64 PPIs Marc Zyngier
2026-04-17 16:10   ` Joey Gouly
2026-04-15 11:55 ` [PATCH 10/18] KVM: arm64: vgic-v5: Add missing trap handing for NV triage Marc Zyngier
2026-04-15 11:55 ` [PATCH 11/18] KVM: arm64: vgic-v5: Atomically assign bits to PPI DVI bitmap Marc Zyngier
2026-04-15 11:55 ` [PATCH 12/18] KVM: arm64: selftests: Add missing GIC CDEN to no-vgic-v5 selftest Marc Zyngier
2026-04-15 11:55 ` [PATCH 13/18] KVM: arm64: selftests: Cleanup unused vars in GICv5 PPI selftest Marc Zyngier
2026-04-15 11:55 ` [PATCH 14/18] KVM: arm64: selftests: Improve error handling for " Marc Zyngier
2026-04-15 11:55 ` [PATCH 15/18] Documentation: KVM: Fix typos in VGICv5 documentation Marc Zyngier
2026-04-17 15:29   ` Joey Gouly
2026-04-15 11:55 ` [PATCH 16/18] Documentation: KVM: Clarify that PMU_V3_IRQ IntID requirements for GICv5 Marc Zyngier
2026-04-15 11:55 ` [PATCH 17/18] irqchip/gic-v5: Immediately exec priority drop following activate Marc Zyngier
2026-04-15 11:55 ` [PATCH 18/18] KVM: arm64: Fix arch timer interrupts for GICv3-on-GICv5 guests Marc Zyngier

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20260415115559.2227718-4-maz@kernel.org \
    --to=maz@kernel.org \
    --cc=joey.gouly@arm.com \
    --cc=kvmarm@lists.linux.dev \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=oupton@kernel.org \
    --cc=sascha.bischoff@arm.com \
    --cc=suzuki.poulose@arm.com \
    --cc=yuzenghui@huawei.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox