From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Zyngier Subject: [PATCH v3 21/59] irqchip/gic-v3-its: Add VPE irq domain [de]activation Date: Mon, 31 Jul 2017 18:25:59 +0100 Message-ID: <20170731172637.29355-22-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 On activation, a VPE is mapped using the VMAPP command, followed by a VINVALL for a good measure. On deactivation, the VPE is simply unmapped. Reviewed-by: Thomas Gleixner Signed-off-by: Marc Zyngier --- drivers/irqchip/irq-gic-v3-its.c | 102 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 102 insertions(+) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 0f9a487448b9..5ca1e571c1b4 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -215,6 +215,16 @@ struct its_cmd_desc { struct { struct its_vpe *vpe; + } its_vinvall_cmd; + + struct { + struct its_vpe *vpe; + struct its_collection *col; + bool valid; + } its_vmapp_cmd; + + struct { + struct its_vpe *vpe; struct its_device *dev; u32 virt_id; u32 event_id; @@ -318,6 +328,16 @@ static void its_encode_db_valid(struct its_cmd_block *cmd, bool db_valid) its_mask_encode(&cmd->raw_cmd[2], db_valid, 0, 0); } +static void its_encode_vpt_addr(struct its_cmd_block *cmd, u64 vpt_pa) +{ + its_mask_encode(&cmd->raw_cmd[3], vpt_pa >> 16, 50, 16); +} + +static void its_encode_vpt_size(struct its_cmd_block *cmd, u8 vpt_size) +{ + its_mask_encode(&cmd->raw_cmd[3], vpt_size, 4, 0); +} + static inline void its_fixup_cmd(struct its_cmd_block *cmd) { /* Let's fixup BE commands */ @@ -476,6 +496,36 @@ static struct its_collection *its_build_invall_cmd(struct its_cmd_block *cmd, return NULL; } +static struct its_vpe *its_build_vinvall_cmd(struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + its_encode_cmd(cmd, GITS_CMD_VINVALL); + its_encode_vpeid(cmd, desc->its_vinvall_cmd.vpe->vpe_id); + + its_fixup_cmd(cmd); + + return desc->its_vinvall_cmd.vpe; +} + +static struct its_vpe *its_build_vmapp_cmd(struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + unsigned long vpt_addr; + + vpt_addr = virt_to_phys(page_address(desc->its_vmapp_cmd.vpe->vpt_page)); + + its_encode_cmd(cmd, GITS_CMD_VMAPP); + its_encode_vpeid(cmd, desc->its_vmapp_cmd.vpe->vpe_id); + its_encode_valid(cmd, desc->its_vmapp_cmd.valid); + its_encode_target(cmd, desc->its_vmapp_cmd.col->target_address); + its_encode_vpt_addr(cmd, vpt_addr); + its_encode_vpt_size(cmd, LPI_NRBITS - 1); + + its_fixup_cmd(cmd); + + return desc->its_vmapp_cmd.vpe; +} + static struct its_vpe *its_build_vmapti_cmd(struct its_cmd_block *cmd, struct its_cmd_desc *desc) { @@ -797,6 +847,37 @@ static void its_send_vmovi(struct its_device *dev, u32 id) its_send_single_vcommand(dev->its, its_build_vmovi_cmd, &desc); } +static void its_send_vmapp(struct its_vpe *vpe, bool valid) +{ + struct its_cmd_desc desc; + struct its_node *its; + + desc.its_vmapp_cmd.vpe = vpe; + desc.its_vmapp_cmd.valid = valid; + + list_for_each_entry(its, &its_nodes, entry) { + if (!its->is_v4) + continue; + + desc.its_vmapp_cmd.col = &its->collections[vpe->col_idx]; + its_send_single_vcommand(its, its_build_vmapp_cmd, &desc); + } +} + +static void its_send_vinvall(struct its_vpe *vpe) +{ + struct its_cmd_desc desc; + struct its_node *its; + + desc.its_vinvall_cmd.vpe = vpe; + + list_for_each_entry(its, &its_nodes, entry) { + if (!its->is_v4) + continue; + its_send_single_vcommand(its, its_build_vinvall_cmd, &desc); + } +} + /* * irqchip functions - assumes MSI, mostly. */ @@ -2197,9 +2278,30 @@ static int its_vpe_irq_domain_alloc(struct irq_domain *domain, unsigned int virq return err; } +static void its_vpe_irq_domain_activate(struct irq_domain *domain, + struct irq_data *d) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + + /* Map the VPE to the first possible CPU */ + vpe->col_idx = cpumask_first(cpu_online_mask); + its_send_vmapp(vpe, true); + its_send_vinvall(vpe); +} + +static void its_vpe_irq_domain_deactivate(struct irq_domain *domain, + struct irq_data *d) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + + its_send_vmapp(vpe, false); +} + static const struct irq_domain_ops its_vpe_domain_ops = { .alloc = its_vpe_irq_domain_alloc, .free = its_vpe_irq_domain_free, + .activate = its_vpe_irq_domain_activate, + .deactivate = its_vpe_irq_domain_deactivate, }; static int its_force_quiescent(void __iomem *base) -- 2.11.0