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The Cache Size Selection Register (CSSELR) selects the current Cache Size ID Register (CCSIDR). You write which cache you are interested in to CSSELR, and read the information out of CCSIDR. Which cache numbers are valid is known by reading the Cache Level ID Register (CLIDR). To export this state to userspace, we add a KVM_REG_ARM_DEMUX numberspace (17), which uses 8 bits to represent which register is being demultiplexed (0 for CCSIDR), and the lower 8 bits to represent this demultiplexing (in our case, the CSSELR value, which is 4 bits). Reviewed-by: Will Deacon <will.deacon@arm.com> Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
137 lines
4.1 KiB
C
137 lines
4.1 KiB
C
/*
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* Copyright (C) 2012 - Virtual Open Systems and Columbia University
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* Author: Christoffer Dall <c.dall@virtualopensystems.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef __ARM_KVM_H__
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#define __ARM_KVM_H__
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#include <linux/types.h>
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#include <asm/ptrace.h>
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#define __KVM_HAVE_GUEST_DEBUG
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#define __KVM_HAVE_IRQ_LINE
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#define KVM_REG_SIZE(id) \
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(1U << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT))
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/* Valid for svc_regs, abt_regs, und_regs, irq_regs in struct kvm_regs */
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#define KVM_ARM_SVC_sp svc_regs[0]
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#define KVM_ARM_SVC_lr svc_regs[1]
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#define KVM_ARM_SVC_spsr svc_regs[2]
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#define KVM_ARM_ABT_sp abt_regs[0]
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#define KVM_ARM_ABT_lr abt_regs[1]
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#define KVM_ARM_ABT_spsr abt_regs[2]
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#define KVM_ARM_UND_sp und_regs[0]
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#define KVM_ARM_UND_lr und_regs[1]
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#define KVM_ARM_UND_spsr und_regs[2]
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#define KVM_ARM_IRQ_sp irq_regs[0]
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#define KVM_ARM_IRQ_lr irq_regs[1]
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#define KVM_ARM_IRQ_spsr irq_regs[2]
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/* Valid only for fiq_regs in struct kvm_regs */
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#define KVM_ARM_FIQ_r8 fiq_regs[0]
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#define KVM_ARM_FIQ_r9 fiq_regs[1]
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#define KVM_ARM_FIQ_r10 fiq_regs[2]
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#define KVM_ARM_FIQ_fp fiq_regs[3]
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#define KVM_ARM_FIQ_ip fiq_regs[4]
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#define KVM_ARM_FIQ_sp fiq_regs[5]
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#define KVM_ARM_FIQ_lr fiq_regs[6]
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#define KVM_ARM_FIQ_spsr fiq_regs[7]
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struct kvm_regs {
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struct pt_regs usr_regs;/* R0_usr - R14_usr, PC, CPSR */
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__u32 svc_regs[3]; /* SP_svc, LR_svc, SPSR_svc */
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__u32 abt_regs[3]; /* SP_abt, LR_abt, SPSR_abt */
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__u32 und_regs[3]; /* SP_und, LR_und, SPSR_und */
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__u32 irq_regs[3]; /* SP_irq, LR_irq, SPSR_irq */
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__u32 fiq_regs[8]; /* R8_fiq - R14_fiq, SPSR_fiq */
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};
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/* Supported Processor Types */
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#define KVM_ARM_TARGET_CORTEX_A15 0
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#define KVM_ARM_NUM_TARGETS 1
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struct kvm_vcpu_init {
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__u32 target;
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__u32 features[7];
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};
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struct kvm_sregs {
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};
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struct kvm_fpu {
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};
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struct kvm_guest_debug_arch {
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};
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struct kvm_debug_exit_arch {
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};
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struct kvm_sync_regs {
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};
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struct kvm_arch_memory_slot {
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};
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/* If you need to interpret the index values, here is the key: */
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#define KVM_REG_ARM_COPROC_MASK 0x000000000FFF0000
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#define KVM_REG_ARM_COPROC_SHIFT 16
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#define KVM_REG_ARM_32_OPC2_MASK 0x0000000000000007
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#define KVM_REG_ARM_32_OPC2_SHIFT 0
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#define KVM_REG_ARM_OPC1_MASK 0x0000000000000078
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#define KVM_REG_ARM_OPC1_SHIFT 3
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#define KVM_REG_ARM_CRM_MASK 0x0000000000000780
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#define KVM_REG_ARM_CRM_SHIFT 7
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#define KVM_REG_ARM_32_CRN_MASK 0x0000000000007800
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#define KVM_REG_ARM_32_CRN_SHIFT 11
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/* Normal registers are mapped as coprocessor 16. */
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#define KVM_REG_ARM_CORE (0x0010 << KVM_REG_ARM_COPROC_SHIFT)
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#define KVM_REG_ARM_CORE_REG(name) (offsetof(struct kvm_regs, name) / 4)
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/* Some registers need more space to represent values. */
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#define KVM_REG_ARM_DEMUX (0x0011 << KVM_REG_ARM_COPROC_SHIFT)
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#define KVM_REG_ARM_DEMUX_ID_MASK 0x000000000000FF00
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#define KVM_REG_ARM_DEMUX_ID_SHIFT 8
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#define KVM_REG_ARM_DEMUX_ID_CCSIDR (0x00 << KVM_REG_ARM_DEMUX_ID_SHIFT)
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#define KVM_REG_ARM_DEMUX_VAL_MASK 0x00000000000000FF
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#define KVM_REG_ARM_DEMUX_VAL_SHIFT 0
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/* KVM_IRQ_LINE irq field index values */
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#define KVM_ARM_IRQ_TYPE_SHIFT 24
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#define KVM_ARM_IRQ_TYPE_MASK 0xff
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#define KVM_ARM_IRQ_VCPU_SHIFT 16
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#define KVM_ARM_IRQ_VCPU_MASK 0xff
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#define KVM_ARM_IRQ_NUM_SHIFT 0
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#define KVM_ARM_IRQ_NUM_MASK 0xffff
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/* irq_type field */
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#define KVM_ARM_IRQ_TYPE_CPU 0
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#define KVM_ARM_IRQ_TYPE_SPI 1
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#define KVM_ARM_IRQ_TYPE_PPI 2
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/* out-of-kernel GIC cpu interrupt injection irq_number field */
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#define KVM_ARM_IRQ_CPU_IRQ 0
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#define KVM_ARM_IRQ_CPU_FIQ 1
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/* Highest supported SPI, from VGIC_NR_IRQS */
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#define KVM_ARM_IRQ_GIC_MAX 127
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#endif /* __ARM_KVM_H__ */
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