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linux_dsm_epyc7002/include/linux/irqchip/arm-gic-v3.h
Marc Zyngier f54b97ed0b irqchip: gicv3-its: Allocate enough memory for the full range of DeviceID 
The ITS table allocator is only allocating a single page per table.
This works fine for most things, but leads to silent lack of
interrupt delivery if we end-up with a device that has an ID that is
out of the range defined by a single page of memory. Even worse, depending
on the page size, behaviour changes, which is not a very good experience.

A solution is actually to allocate memory for the full range of ID that
the ITS supports. A massive waste memory wise, but at least a safe bet.

Tested on a Phytium SoC.

Tested-by: Chen Baozi <chenbaozi@kylinos.com.cn>
Acked-by: Chen Baozi <chenbaozi@kylinos.com.cn>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Link: https://lkml.kernel.org/r/1425659870-11832-3-git-send-email-marc.zyngier@arm.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2015-03-08 05:32:52 +00:00

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/*
* Copyright (C) 2013, 2014 ARM Limited, All Rights Reserved.
* Author: Marc Zyngier <marc.zyngier@arm.com>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __LINUX_IRQCHIP_ARM_GIC_V3_H
#define __LINUX_IRQCHIP_ARM_GIC_V3_H
#include <asm/sysreg.h>
/*
* Distributor registers. We assume we're running non-secure, with ARE
* being set. Secure-only and non-ARE registers are not described.
*/
#define GICD_CTLR 0x0000
#define GICD_TYPER 0x0004
#define GICD_IIDR 0x0008
#define GICD_STATUSR 0x0010
#define GICD_SETSPI_NSR 0x0040
#define GICD_CLRSPI_NSR 0x0048
#define GICD_SETSPI_SR 0x0050
#define GICD_CLRSPI_SR 0x0058
#define GICD_SEIR 0x0068
#define GICD_IGROUPR 0x0080
#define GICD_ISENABLER 0x0100
#define GICD_ICENABLER 0x0180
#define GICD_ISPENDR 0x0200
#define GICD_ICPENDR 0x0280
#define GICD_ISACTIVER 0x0300
#define GICD_ICACTIVER 0x0380
#define GICD_IPRIORITYR 0x0400
#define GICD_ICFGR 0x0C00
#define GICD_IGRPMODR 0x0D00
#define GICD_NSACR 0x0E00
#define GICD_IROUTER 0x6000
#define GICD_IDREGS 0xFFD0
#define GICD_PIDR2 0xFFE8
/*
* Those registers are actually from GICv2, but the spec demands that they
* are implemented as RES0 if ARE is 1 (which we do in KVM's emulated GICv3).
*/
#define GICD_ITARGETSR 0x0800
#define GICD_SGIR 0x0F00
#define GICD_CPENDSGIR 0x0F10
#define GICD_SPENDSGIR 0x0F20
#define GICD_CTLR_RWP (1U << 31)
#define GICD_CTLR_DS (1U << 6)
#define GICD_CTLR_ARE_NS (1U << 4)
#define GICD_CTLR_ENABLE_G1A (1U << 1)
#define GICD_CTLR_ENABLE_G1 (1U << 0)
/*
* In systems with a single security state (what we emulate in KVM)
* the meaning of the interrupt group enable bits is slightly different
*/
#define GICD_CTLR_ENABLE_SS_G1 (1U << 1)
#define GICD_CTLR_ENABLE_SS_G0 (1U << 0)
#define GICD_TYPER_LPIS (1U << 17)
#define GICD_TYPER_MBIS (1U << 16)
#define GICD_TYPER_ID_BITS(typer) ((((typer) >> 19) & 0x1f) + 1)
#define GICD_TYPER_IRQS(typer) ((((typer) & 0x1f) + 1) * 32)
#define GICD_TYPER_LPIS (1U << 17)
#define GICD_IROUTER_SPI_MODE_ONE (0U << 31)
#define GICD_IROUTER_SPI_MODE_ANY (1U << 31)
#define GIC_PIDR2_ARCH_MASK 0xf0
#define GIC_PIDR2_ARCH_GICv3 0x30
#define GIC_PIDR2_ARCH_GICv4 0x40
#define GIC_V3_DIST_SIZE 0x10000
/*
* Re-Distributor registers, offsets from RD_base
*/
#define GICR_CTLR GICD_CTLR
#define GICR_IIDR 0x0004
#define GICR_TYPER 0x0008
#define GICR_STATUSR GICD_STATUSR
#define GICR_WAKER 0x0014
#define GICR_SETLPIR 0x0040
#define GICR_CLRLPIR 0x0048
#define GICR_SEIR GICD_SEIR
#define GICR_PROPBASER 0x0070
#define GICR_PENDBASER 0x0078
#define GICR_INVLPIR 0x00A0
#define GICR_INVALLR 0x00B0
#define GICR_SYNCR 0x00C0
#define GICR_MOVLPIR 0x0100
#define GICR_MOVALLR 0x0110
#define GICR_IDREGS GICD_IDREGS
#define GICR_PIDR2 GICD_PIDR2
#define GICR_CTLR_ENABLE_LPIS (1UL << 0)
#define GICR_TYPER_CPU_NUMBER(r) (((r) >> 8) & 0xffff)
#define GICR_WAKER_ProcessorSleep (1U << 1)
#define GICR_WAKER_ChildrenAsleep (1U << 2)
#define GICR_PROPBASER_NonShareable (0U << 10)
#define GICR_PROPBASER_InnerShareable (1U << 10)
#define GICR_PROPBASER_OuterShareable (2U << 10)
#define GICR_PROPBASER_SHAREABILITY_MASK (3UL << 10)
#define GICR_PROPBASER_nCnB (0U << 7)
#define GICR_PROPBASER_nC (1U << 7)
#define GICR_PROPBASER_RaWt (2U << 7)
#define GICR_PROPBASER_RaWb (3U << 7)
#define GICR_PROPBASER_WaWt (4U << 7)
#define GICR_PROPBASER_WaWb (5U << 7)
#define GICR_PROPBASER_RaWaWt (6U << 7)
#define GICR_PROPBASER_RaWaWb (7U << 7)
#define GICR_PROPBASER_IDBITS_MASK (0x1f)
/*
* Re-Distributor registers, offsets from SGI_base
*/
#define GICR_IGROUPR0 GICD_IGROUPR
#define GICR_ISENABLER0 GICD_ISENABLER
#define GICR_ICENABLER0 GICD_ICENABLER
#define GICR_ISPENDR0 GICD_ISPENDR
#define GICR_ICPENDR0 GICD_ICPENDR
#define GICR_ISACTIVER0 GICD_ISACTIVER
#define GICR_ICACTIVER0 GICD_ICACTIVER
#define GICR_IPRIORITYR0 GICD_IPRIORITYR
#define GICR_ICFGR0 GICD_ICFGR
#define GICR_IGRPMODR0 GICD_IGRPMODR
#define GICR_NSACR GICD_NSACR
#define GICR_TYPER_PLPIS (1U << 0)
#define GICR_TYPER_VLPIS (1U << 1)
#define GICR_TYPER_LAST (1U << 4)
#define GIC_V3_REDIST_SIZE 0x20000
#define LPI_PROP_GROUP1 (1 << 1)
#define LPI_PROP_ENABLED (1 << 0)
/*
* ITS registers, offsets from ITS_base
*/
#define GITS_CTLR 0x0000
#define GITS_IIDR 0x0004
#define GITS_TYPER 0x0008
#define GITS_CBASER 0x0080
#define GITS_CWRITER 0x0088
#define GITS_CREADR 0x0090
#define GITS_BASER 0x0100
#define GITS_PIDR2 GICR_PIDR2
#define GITS_TRANSLATER 0x10040
#define GITS_TYPER_DEVBITS_SHIFT 13
#define GITS_TYPER_DEVBITS(r) ((((r) >> GITS_TYPER_DEVBITS_SHIFT) & 0x1f) + 1)
#define GITS_TYPER_PTA (1UL << 19)
#define GITS_CBASER_VALID (1UL << 63)
#define GITS_CBASER_nCnB (0UL << 59)
#define GITS_CBASER_nC (1UL << 59)
#define GITS_CBASER_RaWt (2UL << 59)
#define GITS_CBASER_RaWb (3UL << 59)
#define GITS_CBASER_WaWt (4UL << 59)
#define GITS_CBASER_WaWb (5UL << 59)
#define GITS_CBASER_RaWaWt (6UL << 59)
#define GITS_CBASER_RaWaWb (7UL << 59)
#define GITS_CBASER_NonShareable (0UL << 10)
#define GITS_CBASER_InnerShareable (1UL << 10)
#define GITS_CBASER_OuterShareable (2UL << 10)
#define GITS_CBASER_SHAREABILITY_MASK (3UL << 10)
#define GITS_BASER_NR_REGS 8
#define GITS_BASER_VALID (1UL << 63)
#define GITS_BASER_nCnB (0UL << 59)
#define GITS_BASER_nC (1UL << 59)
#define GITS_BASER_RaWt (2UL << 59)
#define GITS_BASER_RaWb (3UL << 59)
#define GITS_BASER_WaWt (4UL << 59)
#define GITS_BASER_WaWb (5UL << 59)
#define GITS_BASER_RaWaWt (6UL << 59)
#define GITS_BASER_RaWaWb (7UL << 59)
#define GITS_BASER_TYPE_SHIFT (56)
#define GITS_BASER_TYPE(r) (((r) >> GITS_BASER_TYPE_SHIFT) & 7)
#define GITS_BASER_ENTRY_SIZE_SHIFT (48)
#define GITS_BASER_ENTRY_SIZE(r) ((((r) >> GITS_BASER_ENTRY_SIZE_SHIFT) & 0xff) + 1)
#define GITS_BASER_NonShareable (0UL << 10)
#define GITS_BASER_InnerShareable (1UL << 10)
#define GITS_BASER_OuterShareable (2UL << 10)
#define GITS_BASER_SHAREABILITY_SHIFT (10)
#define GITS_BASER_SHAREABILITY_MASK (3UL << GITS_BASER_SHAREABILITY_SHIFT)
#define GITS_BASER_PAGE_SIZE_SHIFT (8)
#define GITS_BASER_PAGE_SIZE_4K (0UL << GITS_BASER_PAGE_SIZE_SHIFT)
#define GITS_BASER_PAGE_SIZE_16K (1UL << GITS_BASER_PAGE_SIZE_SHIFT)
#define GITS_BASER_PAGE_SIZE_64K (2UL << GITS_BASER_PAGE_SIZE_SHIFT)
#define GITS_BASER_PAGE_SIZE_MASK (3UL << GITS_BASER_PAGE_SIZE_SHIFT)
#define GITS_BASER_TYPE_NONE 0
#define GITS_BASER_TYPE_DEVICE 1
#define GITS_BASER_TYPE_VCPU 2
#define GITS_BASER_TYPE_CPU 3
#define GITS_BASER_TYPE_COLLECTION 4
#define GITS_BASER_TYPE_RESERVED5 5
#define GITS_BASER_TYPE_RESERVED6 6
#define GITS_BASER_TYPE_RESERVED7 7
/*
* ITS commands
*/
#define GITS_CMD_MAPD 0x08
#define GITS_CMD_MAPC 0x09
#define GITS_CMD_MAPVI 0x0a
#define GITS_CMD_MOVI 0x01
#define GITS_CMD_DISCARD 0x0f
#define GITS_CMD_INV 0x0c
#define GITS_CMD_MOVALL 0x0e
#define GITS_CMD_INVALL 0x0d
#define GITS_CMD_INT 0x03
#define GITS_CMD_CLEAR 0x04
#define GITS_CMD_SYNC 0x05
/*
* CPU interface registers
*/
#define ICC_CTLR_EL1_EOImode_drop_dir (0U << 1)
#define ICC_CTLR_EL1_EOImode_drop (1U << 1)
#define ICC_SRE_EL1_SRE (1U << 0)
/*
* Hypervisor interface registers (SRE only)
*/
#define ICH_LR_VIRTUAL_ID_MASK ((1UL << 32) - 1)
#define ICH_LR_EOI (1UL << 41)
#define ICH_LR_GROUP (1UL << 60)
#define ICH_LR_STATE (3UL << 62)
#define ICH_LR_PENDING_BIT (1UL << 62)
#define ICH_LR_ACTIVE_BIT (1UL << 63)
#define ICH_MISR_EOI (1 << 0)
#define ICH_MISR_U (1 << 1)
#define ICH_HCR_EN (1 << 0)
#define ICH_HCR_UIE (1 << 1)
#define ICH_VMCR_CTLR_SHIFT 0
#define ICH_VMCR_CTLR_MASK (0x21f << ICH_VMCR_CTLR_SHIFT)
#define ICH_VMCR_BPR1_SHIFT 18
#define ICH_VMCR_BPR1_MASK (7 << ICH_VMCR_BPR1_SHIFT)
#define ICH_VMCR_BPR0_SHIFT 21
#define ICH_VMCR_BPR0_MASK (7 << ICH_VMCR_BPR0_SHIFT)
#define ICH_VMCR_PMR_SHIFT 24
#define ICH_VMCR_PMR_MASK (0xffUL << ICH_VMCR_PMR_SHIFT)
#define ICC_EOIR1_EL1 sys_reg(3, 0, 12, 12, 1)
#define ICC_IAR1_EL1 sys_reg(3, 0, 12, 12, 0)
#define ICC_SGI1R_EL1 sys_reg(3, 0, 12, 11, 5)
#define ICC_PMR_EL1 sys_reg(3, 0, 4, 6, 0)
#define ICC_CTLR_EL1 sys_reg(3, 0, 12, 12, 4)
#define ICC_SRE_EL1 sys_reg(3, 0, 12, 12, 5)
#define ICC_GRPEN1_EL1 sys_reg(3, 0, 12, 12, 7)
#define ICC_IAR1_EL1_SPURIOUS 0x3ff
#define ICC_SRE_EL2 sys_reg(3, 4, 12, 9, 5)
#define ICC_SRE_EL2_SRE (1 << 0)
#define ICC_SRE_EL2_ENABLE (1 << 3)
#define ICC_SGI1R_TARGET_LIST_SHIFT 0
#define ICC_SGI1R_TARGET_LIST_MASK (0xffff << ICC_SGI1R_TARGET_LIST_SHIFT)
#define ICC_SGI1R_AFFINITY_1_SHIFT 16
#define ICC_SGI1R_AFFINITY_1_MASK (0xff << ICC_SGI1R_AFFINITY_1_SHIFT)
#define ICC_SGI1R_SGI_ID_SHIFT 24
#define ICC_SGI1R_SGI_ID_MASK (0xff << ICC_SGI1R_SGI_ID_SHIFT)
#define ICC_SGI1R_AFFINITY_2_SHIFT 32
#define ICC_SGI1R_AFFINITY_2_MASK (0xffULL << ICC_SGI1R_AFFINITY_1_SHIFT)
#define ICC_SGI1R_IRQ_ROUTING_MODE_BIT 40
#define ICC_SGI1R_AFFINITY_3_SHIFT 48
#define ICC_SGI1R_AFFINITY_3_MASK (0xffULL << ICC_SGI1R_AFFINITY_1_SHIFT)
/*
* System register definitions
*/
#define ICH_VSEIR_EL2 sys_reg(3, 4, 12, 9, 4)
#define ICH_HCR_EL2 sys_reg(3, 4, 12, 11, 0)
#define ICH_VTR_EL2 sys_reg(3, 4, 12, 11, 1)
#define ICH_MISR_EL2 sys_reg(3, 4, 12, 11, 2)
#define ICH_EISR_EL2 sys_reg(3, 4, 12, 11, 3)
#define ICH_ELSR_EL2 sys_reg(3, 4, 12, 11, 5)
#define ICH_VMCR_EL2 sys_reg(3, 4, 12, 11, 7)
#define __LR0_EL2(x) sys_reg(3, 4, 12, 12, x)
#define __LR8_EL2(x) sys_reg(3, 4, 12, 13, x)
#define ICH_LR0_EL2 __LR0_EL2(0)
#define ICH_LR1_EL2 __LR0_EL2(1)
#define ICH_LR2_EL2 __LR0_EL2(2)
#define ICH_LR3_EL2 __LR0_EL2(3)
#define ICH_LR4_EL2 __LR0_EL2(4)
#define ICH_LR5_EL2 __LR0_EL2(5)
#define ICH_LR6_EL2 __LR0_EL2(6)
#define ICH_LR7_EL2 __LR0_EL2(7)
#define ICH_LR8_EL2 __LR8_EL2(0)
#define ICH_LR9_EL2 __LR8_EL2(1)
#define ICH_LR10_EL2 __LR8_EL2(2)
#define ICH_LR11_EL2 __LR8_EL2(3)
#define ICH_LR12_EL2 __LR8_EL2(4)
#define ICH_LR13_EL2 __LR8_EL2(5)
#define ICH_LR14_EL2 __LR8_EL2(6)
#define ICH_LR15_EL2 __LR8_EL2(7)
#define __AP0Rx_EL2(x) sys_reg(3, 4, 12, 8, x)
#define ICH_AP0R0_EL2 __AP0Rx_EL2(0)
#define ICH_AP0R1_EL2 __AP0Rx_EL2(1)
#define ICH_AP0R2_EL2 __AP0Rx_EL2(2)
#define ICH_AP0R3_EL2 __AP0Rx_EL2(3)
#define __AP1Rx_EL2(x) sys_reg(3, 4, 12, 9, x)
#define ICH_AP1R0_EL2 __AP1Rx_EL2(0)
#define ICH_AP1R1_EL2 __AP1Rx_EL2(1)
#define ICH_AP1R2_EL2 __AP1Rx_EL2(2)
#define ICH_AP1R3_EL2 __AP1Rx_EL2(3)
#ifndef __ASSEMBLY__
#include <linux/stringify.h>
/*
* We need a value to serve as a irq-type for LPIs. Choose one that will
* hopefully pique the interest of the reviewer.
*/
#define GIC_IRQ_TYPE_LPI 0xa110c8ed
struct rdists {
struct {
void __iomem *rd_base;
struct page *pend_page;
phys_addr_t phys_base;
} __percpu *rdist;
struct page *prop_page;
int id_bits;
u64 flags;
};
static inline void gic_write_eoir(u64 irq)
{
asm volatile("msr_s " __stringify(ICC_EOIR1_EL1) ", %0" : : "r" (irq));
isb();
}
struct irq_domain;
int its_cpu_init(void);
int its_init(struct device_node *node, struct rdists *rdists,
struct irq_domain *domain);
#endif
#endif
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