irqchip/gic-v3-its: Add VPE interrupt masking (f6a91da7) · Commits · 戴 / test

arch/arm/include/asm/arch_gicv3.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -275,6 +275,12 @@ static inline u64 __gic_readq_nonatomic(const volatile void __iomem *addr)
		#define gicr_read_pendbaser(c) __gic_readq_nonatomic(c)
		#define gicr_write_pendbaser(v, c) __gic_writeq_nonatomic(v, c)

		/*
		* GICR_xLPIR - only the lower bits are significant
		*/
		#define gic_read_lpir(c) readl_relaxed(c)
		#define gic_write_lpir(v, c) writel_relaxed(lower_32_bits(v), c)

		/*
		* GITS_TYPER is an ID register and doesn't need atomicity.
		*/

+2 −0

Original line number	Diff line number	Diff line
		@@ -116,6 +116,8 @@ static inline void gic_write_bpr1(u32 val)

		#define gic_read_typer(c) readq_relaxed(c)
		#define gic_write_irouter(v, c) writeq_relaxed(v, c)
		#define gic_read_lpir(c) readq_relaxed(c)
		#define gic_write_lpir(v, c) writeq_relaxed(v, c)

		#define gic_flush_dcache_to_poc(a,l) __flush_dcache_area((a), (l))

+33 −0

Original line number	Diff line number	Diff line
		@@ -2336,8 +2336,41 @@ static int its_vpe_set_vcpu_affinity(struct irq_data d, void vcpu_info)
		}
		}

		static void its_vpe_send_inv(struct irq_data *d)
		{
		struct its_vpe *vpe = irq_data_get_irq_chip_data(d);
		void __iomem *rdbase;

		rdbase = per_cpu_ptr(gic_rdists->rdist, vpe->col_idx)->rd_base;
		gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_INVLPIR);
		while (gic_read_lpir(rdbase + GICR_SYNCR) & 1)
		cpu_relax();
		}

		static void its_vpe_mask_irq(struct irq_data *d)
		{
		/*
		* We need to unmask the LPI, which is described by the parent
		* irq_data. Instead of calling into the parent (which won't
		* exactly do the right thing, let's simply use the
		* parent_data pointer. Yes, I'm naughty.
		*/
		lpi_write_config(d->parent_data, LPI_PROP_ENABLED, 0);
		its_vpe_send_inv(d);
		}

		static void its_vpe_unmask_irq(struct irq_data *d)
		{
		/* Same hack as above... */
		lpi_write_config(d->parent_data, 0, LPI_PROP_ENABLED);
		its_vpe_send_inv(d);
		}

		static struct irq_chip its_vpe_irq_chip = {
		.name = "GICv4-vpe",
		.irq_mask = its_vpe_mask_irq,
		.irq_unmask = its_vpe_unmask_irq,
		.irq_eoi = irq_chip_eoi_parent,
		.irq_set_affinity = its_vpe_set_affinity,
		.irq_set_vcpu_affinity = its_vpe_set_vcpu_affinity,
		};