debug-sr.h File Reference

#include <linux/compiler.h>
#include <linux/kvm_host.h>
#include <asm/debug-monitors.h>
#include <asm/kvm_asm.h>
#include <asm/kvm_hyp.h>
#include <asm/kvm_mmu.h>

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Macros
#define	read_debug(r, n)   read_sysreg(r##n##_el1)
#define	write_debug(v, r, n)   write_sysreg(v, r##n##_el1)
#define	save_debug(ptr, reg, nr)
#define	restore_debug(ptr, reg, nr)

Functions
static void	__debug_save_state (struct kvm_guest_debug_arch *dbg, struct kvm_cpu_context *ctxt)
static void	__debug_restore_state (struct kvm_guest_debug_arch *dbg, struct kvm_cpu_context *ctxt)
static void	__debug_switch_to_guest_common (struct kvm_vcpu *vcpu)
static void	__debug_switch_to_host_common (struct kvm_vcpu *vcpu)

Macro Definition Documentation

read_debug

#define read_debug	(		r,
			n
	)		read_sysreg(r##n##_el1)

Definition at line 18 of file debug-sr.h.

restore_debug

#define restore_debug	(		ptr,
			reg,
			nr
	)

Definition at line 56 of file debug-sr.h.

save_debug

#define save_debug	(		ptr,
			reg,
			nr
	)

Definition at line 21 of file debug-sr.h.

write_debug

#define write_debug	(		v,
			r,
			n
	)		write_sysreg(v, r##n##_el1)

Definition at line 19 of file debug-sr.h.

Function Documentation

__debug_restore_state()

static void __debug_restore_state ( struct kvm_guest_debug_arch *  dbg, struct kvm_cpu_context *  ctxt  )

static

Definition at line 109 of file debug-sr.h.

{
    u64 aa64dfr0;
    int brps, wrps;
 
    aa64dfr0 = read_sysreg(id_aa64dfr0_el1);
 
    brps = (aa64dfr0 >> 12) & 0xf;
    wrps = (aa64dfr0 >> 20) & 0xf;
 
    restore_debug(dbg->dbg_bcr, dbgbcr, brps);
    restore_debug(dbg->dbg_bvr, dbgbvr, brps);
    restore_debug(dbg->dbg_wcr, dbgwcr, wrps);
    restore_debug(dbg->dbg_wvr, dbgwvr, wrps);
 
    write_sysreg(ctxt_sys_reg(ctxt, MDCCINT_EL1), mdccint_el1);
}

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__debug_save_state()

static void __debug_save_state ( struct kvm_guest_debug_arch *  dbg, struct kvm_cpu_context *  ctxt  )

static

Definition at line 91 of file debug-sr.h.

{
    u64 aa64dfr0;
    int brps, wrps;
 
    aa64dfr0 = read_sysreg(id_aa64dfr0_el1);
    brps = (aa64dfr0 >> 12) & 0xf;
    wrps = (aa64dfr0 >> 20) & 0xf;
 
    save_debug(dbg->dbg_bcr, dbgbcr, brps);
    save_debug(dbg->dbg_bvr, dbgbvr, brps);
    save_debug(dbg->dbg_wcr, dbgwcr, wrps);
    save_debug(dbg->dbg_wvr, dbgwvr, wrps);
 
    ctxt_sys_reg(ctxt, MDCCINT_EL1) = read_sysreg(mdccint_el1);
}

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__debug_switch_to_guest_common()

static void __debug_switch_to_guest_common ( struct kvm_vcpu *  vcpu )

inlinestatic

Definition at line 128 of file debug-sr.h.

{
    struct kvm_cpu_context *host_ctxt;
    struct kvm_cpu_context *guest_ctxt;
    struct kvm_guest_debug_arch *host_dbg;
    struct kvm_guest_debug_arch *guest_dbg;
 
    if (!vcpu_get_flag(vcpu, DEBUG_DIRTY))
        return;
 
    host_ctxt = &this_cpu_ptr(&kvm_host_data)->host_ctxt;
    guest_ctxt = &vcpu->arch.ctxt;
    host_dbg = &vcpu->arch.host_debug_state.regs;
    guest_dbg = kern_hyp_va(vcpu->arch.debug_ptr);
 
    __debug_save_state(host_dbg, host_ctxt);
    __debug_restore_state(guest_dbg, guest_ctxt);
}

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__debug_switch_to_host_common()

static void __debug_switch_to_host_common ( struct kvm_vcpu *  vcpu )

inlinestatic

Definition at line 147 of file debug-sr.h.

{
    struct kvm_cpu_context *host_ctxt;
    struct kvm_cpu_context *guest_ctxt;
    struct kvm_guest_debug_arch *host_dbg;
    struct kvm_guest_debug_arch *guest_dbg;
 
    if (!vcpu_get_flag(vcpu, DEBUG_DIRTY))
        return;
 
    host_ctxt = &this_cpu_ptr(&kvm_host_data)->host_ctxt;
    guest_ctxt = &vcpu->arch.ctxt;
    host_dbg = &vcpu->arch.host_debug_state.regs;
    guest_dbg = kern_hyp_va(vcpu->arch.debug_ptr);
 
    __debug_save_state(guest_dbg, guest_ctxt);
    __debug_restore_state(host_dbg, host_ctxt);
 
    vcpu_clear_flag(vcpu, DEBUG_DIRTY);
}

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