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KVM: arm64: introduce vcpu->arch.debug_ptr
This introduces a level of indirection for the debug registers. Instead of using the sys_regs[] directly we store registers in a structure in the vcpu. The new kvm_arm_reset_debug_ptr() sets the debug ptr to the guest context. Because we no longer give the sys_regs offset for the sys_reg_desc->reg field, but instead the index into a debug-specific struct we need to add a number of additional trap functions for each register. Also as the generic generic user-space access code no longer works we have introduced a new pair of function pointers to the sys_reg_desc structure to override the generic code when needed. Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Alex Bennée
Marc Zyngier
parent
e0a1b9a937
commit
84e690bfbe
@ -234,5 +234,6 @@ static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
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static inline void kvm_arm_init_debug(void) {}
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static inline void kvm_arm_setup_debug(struct kvm_vcpu *vcpu) {}
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static inline void kvm_arm_clear_debug(struct kvm_vcpu *vcpu) {}
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static inline void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu) {}
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#endif /* __ARM_KVM_HOST_H__ */
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@ -278,6 +278,8 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
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/* Set up the timer */
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kvm_timer_vcpu_init(vcpu);
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kvm_arm_reset_debug_ptr(vcpu);
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return 0;
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}
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@ -46,24 +46,16 @@
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#define CNTKCTL_EL1 20 /* Timer Control Register (EL1) */
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#define PAR_EL1 21 /* Physical Address Register */
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#define MDSCR_EL1 22 /* Monitor Debug System Control Register */
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#define DBGBCR0_EL1 23 /* Debug Breakpoint Control Registers (0-15) */
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#define DBGBCR15_EL1 38
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#define DBGBVR0_EL1 39 /* Debug Breakpoint Value Registers (0-15) */
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#define DBGBVR15_EL1 54
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#define DBGWCR0_EL1 55 /* Debug Watchpoint Control Registers (0-15) */
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#define DBGWCR15_EL1 70
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#define DBGWVR0_EL1 71 /* Debug Watchpoint Value Registers (0-15) */
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#define DBGWVR15_EL1 86
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#define MDCCINT_EL1 87 /* Monitor Debug Comms Channel Interrupt Enable Reg */
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#define MDCCINT_EL1 23 /* Monitor Debug Comms Channel Interrupt Enable Reg */
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/* 32bit specific registers. Keep them at the end of the range */
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#define DACR32_EL2 88 /* Domain Access Control Register */
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#define IFSR32_EL2 89 /* Instruction Fault Status Register */
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#define FPEXC32_EL2 90 /* Floating-Point Exception Control Register */
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#define DBGVCR32_EL2 91 /* Debug Vector Catch Register */
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#define TEECR32_EL1 92 /* ThumbEE Configuration Register */
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#define TEEHBR32_EL1 93 /* ThumbEE Handler Base Register */
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#define NR_SYS_REGS 94
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#define DACR32_EL2 24 /* Domain Access Control Register */
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#define IFSR32_EL2 25 /* Instruction Fault Status Register */
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#define FPEXC32_EL2 26 /* Floating-Point Exception Control Register */
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#define DBGVCR32_EL2 27 /* Debug Vector Catch Register */
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#define TEECR32_EL1 28 /* ThumbEE Configuration Register */
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#define TEEHBR32_EL1 29 /* ThumbEE Handler Base Register */
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#define NR_SYS_REGS 30
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/* 32bit mapping */
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#define c0_MPIDR (MPIDR_EL1 * 2) /* MultiProcessor ID Register */
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@ -108,11 +108,25 @@ struct kvm_vcpu_arch {
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/* Exception Information */
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struct kvm_vcpu_fault_info fault;
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/* Debug state */
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/* Guest debug state */
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u64 debug_flags;
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/*
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* We maintain more than a single set of debug registers to support
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* debugging the guest from the host and to maintain separate host and
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* guest state during world switches. vcpu_debug_state are the debug
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* registers of the vcpu as the guest sees them. host_debug_state are
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* the host registers which are saved and restored during world switches.
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*
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* debug_ptr points to the set of debug registers that should be loaded
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* onto the hardware when running the guest.
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*/
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struct kvm_guest_debug_arch *debug_ptr;
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struct kvm_guest_debug_arch vcpu_debug_state;
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/* Pointer to host CPU context */
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kvm_cpu_context_t *host_cpu_context;
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struct kvm_guest_debug_arch host_debug_state;
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/* VGIC state */
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struct vgic_cpu vgic_cpu;
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@ -242,5 +256,6 @@ static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
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void kvm_arm_init_debug(void);
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void kvm_arm_setup_debug(struct kvm_vcpu *vcpu);
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void kvm_arm_clear_debug(struct kvm_vcpu *vcpu);
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void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu);
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#endif /* __ARM64_KVM_HOST_H__ */
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@ -116,10 +116,16 @@ int main(void)
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DEFINE(VCPU_FAR_EL2, offsetof(struct kvm_vcpu, arch.fault.far_el2));
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DEFINE(VCPU_HPFAR_EL2, offsetof(struct kvm_vcpu, arch.fault.hpfar_el2));
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DEFINE(VCPU_DEBUG_FLAGS, offsetof(struct kvm_vcpu, arch.debug_flags));
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DEFINE(VCPU_DEBUG_PTR, offsetof(struct kvm_vcpu, arch.debug_ptr));
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DEFINE(DEBUG_BCR, offsetof(struct kvm_guest_debug_arch, dbg_bcr));
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DEFINE(DEBUG_BVR, offsetof(struct kvm_guest_debug_arch, dbg_bvr));
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DEFINE(DEBUG_WCR, offsetof(struct kvm_guest_debug_arch, dbg_wcr));
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DEFINE(DEBUG_WVR, offsetof(struct kvm_guest_debug_arch, dbg_wvr));
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DEFINE(VCPU_HCR_EL2, offsetof(struct kvm_vcpu, arch.hcr_el2));
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DEFINE(VCPU_MDCR_EL2, offsetof(struct kvm_vcpu, arch.mdcr_el2));
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DEFINE(VCPU_IRQ_LINES, offsetof(struct kvm_vcpu, arch.irq_lines));
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DEFINE(VCPU_HOST_CONTEXT, offsetof(struct kvm_vcpu, arch.host_cpu_context));
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DEFINE(VCPU_HOST_DEBUG_STATE, offsetof(struct kvm_vcpu, arch.host_debug_state));
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DEFINE(VCPU_TIMER_CNTV_CTL, offsetof(struct kvm_vcpu, arch.timer_cpu.cntv_ctl));
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DEFINE(VCPU_TIMER_CNTV_CVAL, offsetof(struct kvm_vcpu, arch.timer_cpu.cntv_cval));
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DEFINE(KVM_TIMER_CNTVOFF, offsetof(struct kvm, arch.timer.cntvoff));
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@ -66,6 +66,15 @@ void kvm_arm_init_debug(void)
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__this_cpu_write(mdcr_el2, kvm_call_hyp(__kvm_get_mdcr_el2));
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}
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/**
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* kvm_arm_reset_debug_ptr - reset the debug ptr to point to the vcpu state
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*/
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void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu)
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{
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vcpu->arch.debug_ptr = &vcpu->arch.vcpu_debug_state;
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}
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/**
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* kvm_arm_setup_debug - set up debug related stuff
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*
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@ -596,6 +596,7 @@ __restore_sysregs:
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/* Save debug state */
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__save_debug:
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// x2: ptr to CPU context
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// x3: ptr to debug reg struct
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// x4/x5/x6-22/x24-26: trashed
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mrs x26, id_aa64dfr0_el1
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@ -606,15 +607,15 @@ __save_debug:
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sub w25, w26, w25 // How many WPs to skip
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mov x5, x24
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add x4, x2, #CPU_SYSREG_OFFSET(DBGBCR0_EL1)
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add x4, x3, #DEBUG_BCR
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save_debug dbgbcr
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add x4, x2, #CPU_SYSREG_OFFSET(DBGBVR0_EL1)
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add x4, x3, #DEBUG_BVR
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save_debug dbgbvr
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mov x5, x25
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add x4, x2, #CPU_SYSREG_OFFSET(DBGWCR0_EL1)
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add x4, x3, #DEBUG_WCR
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save_debug dbgwcr
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add x4, x2, #CPU_SYSREG_OFFSET(DBGWVR0_EL1)
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add x4, x3, #DEBUG_WVR
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save_debug dbgwvr
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mrs x21, mdccint_el1
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@ -624,6 +625,7 @@ __save_debug:
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/* Restore debug state */
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__restore_debug:
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// x2: ptr to CPU context
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// x3: ptr to debug reg struct
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// x4/x5/x6-22/x24-26: trashed
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mrs x26, id_aa64dfr0_el1
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@ -634,15 +636,15 @@ __restore_debug:
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sub w25, w26, w25 // How many WPs to skip
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mov x5, x24
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add x4, x2, #CPU_SYSREG_OFFSET(DBGBCR0_EL1)
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add x4, x3, #DEBUG_BCR
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restore_debug dbgbcr
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add x4, x2, #CPU_SYSREG_OFFSET(DBGBVR0_EL1)
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add x4, x3, #DEBUG_BVR
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restore_debug dbgbvr
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mov x5, x25
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add x4, x2, #CPU_SYSREG_OFFSET(DBGWCR0_EL1)
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add x4, x3, #DEBUG_WCR
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restore_debug dbgwcr
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add x4, x2, #CPU_SYSREG_OFFSET(DBGWVR0_EL1)
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add x4, x3, #DEBUG_WVR
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restore_debug dbgwvr
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ldr x21, [x2, #CPU_SYSREG_OFFSET(MDCCINT_EL1)]
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@ -682,6 +684,7 @@ ENTRY(__kvm_vcpu_run)
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bl __save_sysregs
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compute_debug_state 1f
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add x3, x0, #VCPU_HOST_DEBUG_STATE
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bl __save_debug
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1:
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activate_traps
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@ -697,6 +700,8 @@ ENTRY(__kvm_vcpu_run)
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bl __restore_fpsimd
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skip_debug_state x3, 1f
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ldr x3, [x0, #VCPU_DEBUG_PTR]
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kern_hyp_va x3
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bl __restore_debug
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1:
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restore_guest_32bit_state
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@ -717,6 +722,8 @@ __kvm_vcpu_return:
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bl __save_sysregs
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skip_debug_state x3, 1f
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ldr x3, [x0, #VCPU_DEBUG_PTR]
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kern_hyp_va x3
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bl __save_debug
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1:
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save_guest_32bit_state
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@ -739,6 +746,7 @@ __kvm_vcpu_return:
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// already been saved. Note that we nuke the whole 64bit word.
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// If we ever add more flags, we'll have to be more careful...
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str xzr, [x0, #VCPU_DEBUG_FLAGS]
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add x3, x0, #VCPU_HOST_DEBUG_STATE
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bl __restore_debug
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1:
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restore_host_regs
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@ -211,6 +211,203 @@ static bool trap_debug_regs(struct kvm_vcpu *vcpu,
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return true;
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}
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/*
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* reg_to_dbg/dbg_to_reg
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*
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* A 32 bit write to a debug register leave top bits alone
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* A 32 bit read from a debug register only returns the bottom bits
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*
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* All writes will set the KVM_ARM64_DEBUG_DIRTY flag to ensure the
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* hyp.S code switches between host and guest values in future.
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*/
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static inline void reg_to_dbg(struct kvm_vcpu *vcpu,
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const struct sys_reg_params *p,
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u64 *dbg_reg)
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{
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u64 val = *vcpu_reg(vcpu, p->Rt);
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if (p->is_32bit) {
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val &= 0xffffffffUL;
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val |= ((*dbg_reg >> 32) << 32);
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}
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*dbg_reg = val;
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vcpu->arch.debug_flags |= KVM_ARM64_DEBUG_DIRTY;
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}
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static inline void dbg_to_reg(struct kvm_vcpu *vcpu,
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const struct sys_reg_params *p,
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u64 *dbg_reg)
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{
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u64 val = *dbg_reg;
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if (p->is_32bit)
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val &= 0xffffffffUL;
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*vcpu_reg(vcpu, p->Rt) = val;
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}
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static inline bool trap_bvr(struct kvm_vcpu *vcpu,
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const struct sys_reg_params *p,
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const struct sys_reg_desc *rd)
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{
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u64 *dbg_reg = &vcpu->arch.vcpu_debug_state.dbg_bvr[rd->reg];
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if (p->is_write)
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reg_to_dbg(vcpu, p, dbg_reg);
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else
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dbg_to_reg(vcpu, p, dbg_reg);
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return true;
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}
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static int set_bvr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
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const struct kvm_one_reg *reg, void __user *uaddr)
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{
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__u64 *r = &vcpu->arch.vcpu_debug_state.dbg_bvr[rd->reg];
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if (copy_from_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0)
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return -EFAULT;
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return 0;
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}
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static int get_bvr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
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const struct kvm_one_reg *reg, void __user *uaddr)
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{
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__u64 *r = &vcpu->arch.vcpu_debug_state.dbg_bvr[rd->reg];
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if (copy_to_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0)
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return -EFAULT;
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return 0;
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}
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static inline void reset_bvr(struct kvm_vcpu *vcpu,
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const struct sys_reg_desc *rd)
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{
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vcpu->arch.vcpu_debug_state.dbg_bvr[rd->reg] = rd->val;
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}
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static inline bool trap_bcr(struct kvm_vcpu *vcpu,
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const struct sys_reg_params *p,
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const struct sys_reg_desc *rd)
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{
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u64 *dbg_reg = &vcpu->arch.vcpu_debug_state.dbg_bcr[rd->reg];
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if (p->is_write)
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reg_to_dbg(vcpu, p, dbg_reg);
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else
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dbg_to_reg(vcpu, p, dbg_reg);
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return true;
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}
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static int set_bcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
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const struct kvm_one_reg *reg, void __user *uaddr)
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{
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__u64 *r = &vcpu->arch.vcpu_debug_state.dbg_bcr[rd->reg];
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if (copy_from_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0)
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return -EFAULT;
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return 0;
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}
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static int get_bcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
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const struct kvm_one_reg *reg, void __user *uaddr)
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{
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__u64 *r = &vcpu->arch.vcpu_debug_state.dbg_bcr[rd->reg];
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if (copy_to_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0)
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return -EFAULT;
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return 0;
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}
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static inline void reset_bcr(struct kvm_vcpu *vcpu,
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const struct sys_reg_desc *rd)
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{
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vcpu->arch.vcpu_debug_state.dbg_bcr[rd->reg] = rd->val;
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}
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static inline bool trap_wvr(struct kvm_vcpu *vcpu,
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const struct sys_reg_params *p,
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const struct sys_reg_desc *rd)
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{
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u64 *dbg_reg = &vcpu->arch.vcpu_debug_state.dbg_wvr[rd->reg];
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if (p->is_write)
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reg_to_dbg(vcpu, p, dbg_reg);
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else
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dbg_to_reg(vcpu, p, dbg_reg);
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return true;
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}
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static int set_wvr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
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const struct kvm_one_reg *reg, void __user *uaddr)
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{
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__u64 *r = &vcpu->arch.vcpu_debug_state.dbg_wvr[rd->reg];
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if (copy_from_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0)
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return -EFAULT;
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return 0;
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}
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static int get_wvr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
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const struct kvm_one_reg *reg, void __user *uaddr)
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{
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__u64 *r = &vcpu->arch.vcpu_debug_state.dbg_wvr[rd->reg];
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if (copy_to_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0)
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return -EFAULT;
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return 0;
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}
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static inline void reset_wvr(struct kvm_vcpu *vcpu,
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const struct sys_reg_desc *rd)
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{
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vcpu->arch.vcpu_debug_state.dbg_wvr[rd->reg] = rd->val;
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}
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static inline bool trap_wcr(struct kvm_vcpu *vcpu,
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const struct sys_reg_params *p,
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const struct sys_reg_desc *rd)
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{
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u64 *dbg_reg = &vcpu->arch.vcpu_debug_state.dbg_wcr[rd->reg];
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if (p->is_write)
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reg_to_dbg(vcpu, p, dbg_reg);
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else
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dbg_to_reg(vcpu, p, dbg_reg);
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return true;
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}
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static int set_wcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
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const struct kvm_one_reg *reg, void __user *uaddr)
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{
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__u64 *r = &vcpu->arch.vcpu_debug_state.dbg_wcr[rd->reg];
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if (copy_from_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0)
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return -EFAULT;
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return 0;
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}
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static int get_wcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
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const struct kvm_one_reg *reg, void __user *uaddr)
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{
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__u64 *r = &vcpu->arch.vcpu_debug_state.dbg_wcr[rd->reg];
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if (copy_to_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0)
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void reset_wcr(struct kvm_vcpu *vcpu,
|
||||
const struct sys_reg_desc *rd)
|
||||
{
|
||||
vcpu->arch.vcpu_debug_state.dbg_wcr[rd->reg] = rd->val;
|
||||
}
|
||||
|
||||
static void reset_amair_el1(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r)
|
||||
{
|
||||
u64 amair;
|
||||
@ -240,16 +437,16 @@ static void reset_mpidr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r)
|
||||
#define DBG_BCR_BVR_WCR_WVR_EL1(n) \
|
||||
/* DBGBVRn_EL1 */ \
|
||||
{ Op0(0b10), Op1(0b000), CRn(0b0000), CRm((n)), Op2(0b100), \
|
||||
trap_debug_regs, reset_val, (DBGBVR0_EL1 + (n)), 0 }, \
|
||||
trap_bvr, reset_bvr, n, 0, get_bvr, set_bvr }, \
|
||||
/* DBGBCRn_EL1 */ \
|
||||
{ Op0(0b10), Op1(0b000), CRn(0b0000), CRm((n)), Op2(0b101), \
|
||||
trap_debug_regs, reset_val, (DBGBCR0_EL1 + (n)), 0 }, \
|
||||
trap_bcr, reset_bcr, n, 0, get_bcr, set_bcr }, \
|
||||
/* DBGWVRn_EL1 */ \
|
||||
{ Op0(0b10), Op1(0b000), CRn(0b0000), CRm((n)), Op2(0b110), \
|
||||
trap_debug_regs, reset_val, (DBGWVR0_EL1 + (n)), 0 }, \
|
||||
trap_wvr, reset_wvr, n, 0, get_wvr, set_wvr }, \
|
||||
/* DBGWCRn_EL1 */ \
|
||||
{ Op0(0b10), Op1(0b000), CRn(0b0000), CRm((n)), Op2(0b111), \
|
||||
trap_debug_regs, reset_val, (DBGWCR0_EL1 + (n)), 0 }
|
||||
trap_wcr, reset_wcr, n, 0, get_wcr, set_wcr }
|
||||
|
||||
/*
|
||||
* Architected system registers.
|
||||
@ -516,28 +713,55 @@ static bool trap_debug32(struct kvm_vcpu *vcpu,
|
||||
return true;
|
||||
}
|
||||
|
||||
#define DBG_BCR_BVR_WCR_WVR(n) \
|
||||
/* DBGBVRn */ \
|
||||
{ Op1( 0), CRn( 0), CRm((n)), Op2( 4), trap_debug32, \
|
||||
NULL, (cp14_DBGBVR0 + (n) * 2) }, \
|
||||
/* DBGBCRn */ \
|
||||
{ Op1( 0), CRn( 0), CRm((n)), Op2( 5), trap_debug32, \
|
||||
NULL, (cp14_DBGBCR0 + (n) * 2) }, \
|
||||
/* DBGWVRn */ \
|
||||
{ Op1( 0), CRn( 0), CRm((n)), Op2( 6), trap_debug32, \
|
||||
NULL, (cp14_DBGWVR0 + (n) * 2) }, \
|
||||
/* DBGWCRn */ \
|
||||
{ Op1( 0), CRn( 0), CRm((n)), Op2( 7), trap_debug32, \
|
||||
NULL, (cp14_DBGWCR0 + (n) * 2) }
|
||||
/* AArch32 debug register mappings
|
||||
*
|
||||
* AArch32 DBGBVRn is mapped to DBGBVRn_EL1[31:0]
|
||||
* AArch32 DBGBXVRn is mapped to DBGBVRn_EL1[63:32]
|
||||
*
|
||||
* All control registers and watchpoint value registers are mapped to
|
||||
* the lower 32 bits of their AArch64 equivalents. We share the trap
|
||||
* handlers with the above AArch64 code which checks what mode the
|
||||
* system is in.
|
||||
*/
|
||||
|
||||
#define DBGBXVR(n) \
|
||||
{ Op1( 0), CRn( 1), CRm((n)), Op2( 1), trap_debug32, \
|
||||
NULL, cp14_DBGBXVR0 + n * 2 }
|
||||
static inline bool trap_xvr(struct kvm_vcpu *vcpu,
|
||||
const struct sys_reg_params *p,
|
||||
const struct sys_reg_desc *rd)
|
||||
{
|
||||
u64 *dbg_reg = &vcpu->arch.vcpu_debug_state.dbg_bvr[rd->reg];
|
||||
|
||||
if (p->is_write) {
|
||||
u64 val = *dbg_reg;
|
||||
|
||||
val &= 0xffffffffUL;
|
||||
val |= *vcpu_reg(vcpu, p->Rt) << 32;
|
||||
*dbg_reg = val;
|
||||
|
||||
vcpu->arch.debug_flags |= KVM_ARM64_DEBUG_DIRTY;
|
||||
} else {
|
||||
*vcpu_reg(vcpu, p->Rt) = *dbg_reg >> 32;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
#define DBG_BCR_BVR_WCR_WVR(n) \
|
||||
/* DBGBVRn */ \
|
||||
{ Op1( 0), CRn( 0), CRm((n)), Op2( 4), trap_bvr, NULL, n }, \
|
||||
/* DBGBCRn */ \
|
||||
{ Op1( 0), CRn( 0), CRm((n)), Op2( 5), trap_bcr, NULL, n }, \
|
||||
/* DBGWVRn */ \
|
||||
{ Op1( 0), CRn( 0), CRm((n)), Op2( 6), trap_wvr, NULL, n }, \
|
||||
/* DBGWCRn */ \
|
||||
{ Op1( 0), CRn( 0), CRm((n)), Op2( 7), trap_wcr, NULL, n }
|
||||
|
||||
#define DBGBXVR(n) \
|
||||
{ Op1( 0), CRn( 1), CRm((n)), Op2( 1), trap_xvr, NULL, n }
|
||||
|
||||
/*
|
||||
* Trapped cp14 registers. We generally ignore most of the external
|
||||
* debug, on the principle that they don't really make sense to a
|
||||
* guest. Revisit this one day, whould this principle change.
|
||||
* guest. Revisit this one day, would this principle change.
|
||||
*/
|
||||
static const struct sys_reg_desc cp14_regs[] = {
|
||||
/* DBGIDR */
|
||||
@ -1303,6 +1527,9 @@ int kvm_arm_sys_reg_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg
|
||||
if (!r)
|
||||
return get_invariant_sys_reg(reg->id, uaddr);
|
||||
|
||||
if (r->get_user)
|
||||
return (r->get_user)(vcpu, r, reg, uaddr);
|
||||
|
||||
return reg_to_user(uaddr, &vcpu_sys_reg(vcpu, r->reg), reg->id);
|
||||
}
|
||||
|
||||
@ -1321,6 +1548,9 @@ int kvm_arm_sys_reg_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg
|
||||
if (!r)
|
||||
return set_invariant_sys_reg(reg->id, uaddr);
|
||||
|
||||
if (r->set_user)
|
||||
return (r->set_user)(vcpu, r, reg, uaddr);
|
||||
|
||||
return reg_from_user(&vcpu_sys_reg(vcpu, r->reg), uaddr, reg->id);
|
||||
}
|
||||
|
||||
|
||||
@ -55,6 +55,12 @@ struct sys_reg_desc {
|
||||
|
||||
/* Value (usually reset value) */
|
||||
u64 val;
|
||||
|
||||
/* Custom get/set_user functions, fallback to generic if NULL */
|
||||
int (*get_user)(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
|
||||
const struct kvm_one_reg *reg, void __user *uaddr);
|
||||
int (*set_user)(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
|
||||
const struct kvm_one_reg *reg, void __user *uaddr);
|
||||
};
|
||||
|
||||
static inline void print_sys_reg_instr(const struct sys_reg_params *p)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user