From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Zyngier Subject: [PATCH v3 55/59] KVM: arm/arm64: GICv4: Enable VLPI support Date: Mon, 31 Jul 2017 18:26:33 +0100 Message-ID: <20170731172637.29355-56-marc.zyngier@arm.com> References: <20170731172637.29355-1-marc.zyngier@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Jason Cooper , Thomas Gleixner To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Return-path: In-Reply-To: <20170731172637.29355-1-marc.zyngier@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu List-Id: kvm.vger.kernel.org All it takes is the has_v4 flag to be set in gic_kvm_info as well as "kvm-arm.vgic_v4_enable=1" being passed on the command line for GICv4 to be enabled in KVM. Signed-off-by: Marc Zyngier --- Documentation/admin-guide/kernel-parameters.txt | 4 ++++ virt/kvm/arm/vgic/vgic-v3.c | 14 ++++++++++++++ 2 files changed, 18 insertions(+) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index d9c171ce4190..d2927d01d8b2 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1874,6 +1874,10 @@ [KVM,ARM] Trap guest accesses to GICv3 common system registers + kvm-arm.vgic_v4_enable= + [KVM,ARM] Allow use of GICv4 for direct injection of + LPIs. + kvm-intel.ept= [KVM,Intel] Disable extended page tables (virtualized MMU) support on capable Intel chips. Default is 1 (enabled) diff --git a/virt/kvm/arm/vgic/vgic-v3.c b/virt/kvm/arm/vgic/vgic-v3.c index 96ea597db0e7..405733678c2f 100644 --- a/virt/kvm/arm/vgic/vgic-v3.c +++ b/virt/kvm/arm/vgic/vgic-v3.c @@ -24,6 +24,7 @@ static bool group0_trap; static bool group1_trap; static bool common_trap; +static bool gicv4_enable; void vgic_v3_set_underflow(struct kvm_vcpu *vcpu) { @@ -459,6 +460,12 @@ static int __init early_common_trap_cfg(char *buf) } early_param("kvm-arm.vgic_v3_common_trap", early_common_trap_cfg); +static int __init early_gicv4_enable(char *buf) +{ + return strtobool(buf, &gicv4_enable); +} +early_param("kvm-arm.vgic_v4_enable", early_gicv4_enable); + /** * vgic_v3_probe - probe for a GICv3 compatible interrupt controller in DT * @node: pointer to the DT node @@ -478,6 +485,13 @@ int vgic_v3_probe(const struct gic_kvm_info *info) kvm_vgic_global_state.can_emulate_gicv2 = false; kvm_vgic_global_state.ich_vtr_el2 = ich_vtr_el2; + /* GICv4 support? */ + if (info->has_v4) { + kvm_vgic_global_state.has_gicv4 = gicv4_enable; + kvm_info("GICv4 support %sabled\n", + gicv4_enable ? "en" : "dis"); + } + if (!info->vcpu.start) { kvm_info("GICv3: no GICV resource entry\n"); kvm_vgic_global_state.vcpu_base = 0; -- 2.11.0