From: Marc Zyngier <maz@kernel.org>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
Catalin Marinas <catalin.marinas@arm.com>,
Christoffer Dall <christoffer.dall@arm.com>,
Eric Auger <eric.auger@redhat.com>,
KarimAllah Ahmed <karahmed@amazon.de>,
Linus Walleij <linus.walleij@linaro.org>,
Olof Johansson <olof@lixom.net>,
Vladimir Murzin <vladimir.murzin@arm.com>,
Will Deacon <will@kernel.org>, Zenghui Yu <yuzenghui@huawei.com>,
James Morse <james.morse@arm.com>,
Julien Thierry <julien.thierry.kdev@gmail.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org,
kvmarm@lists.cs.columbia.edu
Subject: [PATCH 14/15] KVM: arm64: GICv4.1: Allow non-trapping WFI when using HW SGIs
Date: Tue, 31 Mar 2020 13:16:44 +0100 [thread overview]
Message-ID: <20200331121645.388250-15-maz@kernel.org> (raw)
In-Reply-To: <20200331121645.388250-1-maz@kernel.org>
Just like for VLPIs, it is beneficial to avoid trapping on WFI when the
vcpu is using the GICv4.1 SGIs.
Add such a check to vcpu_clear_wfx_traps().
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Link: https://lore.kernel.org/r/20200304203330.4967-23-maz@kernel.org
---
arch/arm64/include/asm/kvm_emulate.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h
index f658dda12364..a30b4eec7cb4 100644
--- a/arch/arm64/include/asm/kvm_emulate.h
+++ b/arch/arm64/include/asm/kvm_emulate.h
@@ -89,7 +89,8 @@ static inline unsigned long *vcpu_hcr(struct kvm_vcpu *vcpu)
static inline void vcpu_clear_wfx_traps(struct kvm_vcpu *vcpu)
{
vcpu->arch.hcr_el2 &= ~HCR_TWE;
- if (atomic_read(&vcpu->arch.vgic_cpu.vgic_v3.its_vpe.vlpi_count))
+ if (atomic_read(&vcpu->arch.vgic_cpu.vgic_v3.its_vpe.vlpi_count) ||
+ vcpu->kvm->arch.vgic.nassgireq)
vcpu->arch.hcr_el2 &= ~HCR_TWI;
else
vcpu->arch.hcr_el2 |= HCR_TWI;
--
2.25.0
WARNING: multiple messages have this Message-ID (diff)
From: Marc Zyngier <maz@kernel.org>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
KarimAllah Ahmed <karahmed@amazon.de>,
Catalin Marinas <catalin.marinas@arm.com>,
Linus Walleij <linus.walleij@linaro.org>,
linux-arm-kernel@lists.infradead.org,
Olof Johansson <olof@lixom.net>, Will Deacon <will@kernel.org>,
kvmarm@lists.cs.columbia.edu
Subject: [PATCH 14/15] KVM: arm64: GICv4.1: Allow non-trapping WFI when using HW SGIs
Date: Tue, 31 Mar 2020 13:16:44 +0100 [thread overview]
Message-ID: <20200331121645.388250-15-maz@kernel.org> (raw)
In-Reply-To: <20200331121645.388250-1-maz@kernel.org>
Just like for VLPIs, it is beneficial to avoid trapping on WFI when the
vcpu is using the GICv4.1 SGIs.
Add such a check to vcpu_clear_wfx_traps().
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Link: https://lore.kernel.org/r/20200304203330.4967-23-maz@kernel.org
---
arch/arm64/include/asm/kvm_emulate.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h
index f658dda12364..a30b4eec7cb4 100644
--- a/arch/arm64/include/asm/kvm_emulate.h
+++ b/arch/arm64/include/asm/kvm_emulate.h
@@ -89,7 +89,8 @@ static inline unsigned long *vcpu_hcr(struct kvm_vcpu *vcpu)
static inline void vcpu_clear_wfx_traps(struct kvm_vcpu *vcpu)
{
vcpu->arch.hcr_el2 &= ~HCR_TWE;
- if (atomic_read(&vcpu->arch.vgic_cpu.vgic_v3.its_vpe.vlpi_count))
+ if (atomic_read(&vcpu->arch.vgic_cpu.vgic_v3.its_vpe.vlpi_count) ||
+ vcpu->kvm->arch.vgic.nassgireq)
vcpu->arch.hcr_el2 &= ~HCR_TWI;
else
vcpu->arch.hcr_el2 |= HCR_TWI;
--
2.25.0
_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
WARNING: multiple messages have this Message-ID (diff)
From: Marc Zyngier <maz@kernel.org>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Vladimir Murzin <vladimir.murzin@arm.com>,
kvm@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
KarimAllah Ahmed <karahmed@amazon.de>,
Catalin Marinas <catalin.marinas@arm.com>,
Linus Walleij <linus.walleij@linaro.org>,
Christoffer Dall <christoffer.dall@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>,
Eric Auger <eric.auger@redhat.com>,
James Morse <james.morse@arm.com>,
linux-arm-kernel@lists.infradead.org,
Olof Johansson <olof@lixom.net>, Will Deacon <will@kernel.org>,
kvmarm@lists.cs.columbia.edu,
Julien Thierry <julien.thierry.kdev@gmail.com>
Subject: [PATCH 14/15] KVM: arm64: GICv4.1: Allow non-trapping WFI when using HW SGIs
Date: Tue, 31 Mar 2020 13:16:44 +0100 [thread overview]
Message-ID: <20200331121645.388250-15-maz@kernel.org> (raw)
In-Reply-To: <20200331121645.388250-1-maz@kernel.org>
Just like for VLPIs, it is beneficial to avoid trapping on WFI when the
vcpu is using the GICv4.1 SGIs.
Add such a check to vcpu_clear_wfx_traps().
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Link: https://lore.kernel.org/r/20200304203330.4967-23-maz@kernel.org
---
arch/arm64/include/asm/kvm_emulate.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h
index f658dda12364..a30b4eec7cb4 100644
--- a/arch/arm64/include/asm/kvm_emulate.h
+++ b/arch/arm64/include/asm/kvm_emulate.h
@@ -89,7 +89,8 @@ static inline unsigned long *vcpu_hcr(struct kvm_vcpu *vcpu)
static inline void vcpu_clear_wfx_traps(struct kvm_vcpu *vcpu)
{
vcpu->arch.hcr_el2 &= ~HCR_TWE;
- if (atomic_read(&vcpu->arch.vgic_cpu.vgic_v3.its_vpe.vlpi_count))
+ if (atomic_read(&vcpu->arch.vgic_cpu.vgic_v3.its_vpe.vlpi_count) ||
+ vcpu->kvm->arch.vgic.nassgireq)
vcpu->arch.hcr_el2 &= ~HCR_TWI;
else
vcpu->arch.hcr_el2 |= HCR_TWI;
--
2.25.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-03-31 12:21 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-31 12:16 [GIT PULL] KVM/arm updates for Linux 5.7 Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` [PATCH 01/15] KVM: arm64: Use the correct timer structure to access the physical counter Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` [PATCH 02/15] arm: Unplug KVM from the build system Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` [PATCH 03/15] arm: Remove KVM from config files Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` [PATCH 04/15] arm: Remove 32bit KVM host support Marc Zyngier
2020-03-31 12:16 ` [PATCH 05/15] arm: Remove HYP/Stage-2 page-table support Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` [PATCH 06/15] arm: Remove GICv3 vgic compatibility macros Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` [PATCH 07/15] arm: Remove the ability to set HYP vectors outside of the decompressor Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` [PATCH 08/15] MAINTAINERS: RIP KVM/arm Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` [PATCH 09/15] KVM: arm64: GICv4.1: Let doorbells be auto-enabled Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` [PATCH 10/15] KVM: arm64: GICv4.1: Add direct injection capability to SGI registers Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` [PATCH 11/15] KVM: arm64: GICv4.1: Allow SGIs to switch between HW and SW interrupts Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` [PATCH 12/15] KVM: arm64: GICv4.1: Plumb SGI implementation selection in the distributor Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` [PATCH 13/15] KVM: arm64: GICv4.1: Reload VLPI configuration on distributor enable/disable Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier [this message]
2020-03-31 12:16 ` [PATCH 14/15] KVM: arm64: GICv4.1: Allow non-trapping WFI when using HW SGIs Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` [PATCH 15/15] KVM: arm64: GICv4.1: Expose HW-based SGIs in debugfs Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 12:16 ` Marc Zyngier
2020-03-31 14:45 ` [GIT PULL] KVM/arm updates for Linux 5.7 Paolo Bonzini
2020-03-31 14:45 ` Paolo Bonzini
2020-03-31 14:45 ` Paolo Bonzini
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