#ifndef __ARM64_KVM_HYP_DEBUG_SR_H__
#define __ARM64_KVM_HYP_DEBUG_SR_H__
#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>
#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) \
switch (nr) { \
case 15: ptr[15] = read_debug(reg, 15); \
fallthrough; \
case 14: ptr[14] = read_debug(reg, 14); \
fallthrough; \
case 13: ptr[13] = read_debug(reg, 13); \
fallthrough; \
case 12: ptr[12] = read_debug(reg, 12); \
fallthrough; \
case 11: ptr[11] = read_debug(reg, 11); \
fallthrough; \
case 10: ptr[10] = read_debug(reg, 10); \
fallthrough; \
case 9: ptr[9] = read_debug(reg, 9); \
fallthrough; \
case 8: ptr[8] = read_debug(reg, 8); \
fallthrough; \
case 7: ptr[7] = read_debug(reg, 7); \
fallthrough; \
case 6: ptr[6] = read_debug(reg, 6); \
fallthrough; \
case 5: ptr[5] = read_debug(reg, 5); \
fallthrough; \
case 4: ptr[4] = read_debug(reg, 4); \
fallthrough; \
case 3: ptr[3] = read_debug(reg, 3); \
fallthrough; \
case 2: ptr[2] = read_debug(reg, 2); \
fallthrough; \
case 1: ptr[1] = read_debug(reg, 1); \
fallthrough; \
default: ptr[0] = read_debug(reg, 0); \
}
#define restore_debug(ptr,reg,nr) \
switch (nr) { \
case 15: write_debug(ptr[15], reg, 15); \
fallthrough; \
case 14: write_debug(ptr[14], reg, 14); \
fallthrough; \
case 13: write_debug(ptr[13], reg, 13); \
fallthrough; \
case 12: write_debug(ptr[12], reg, 12); \
fallthrough; \
case 11: write_debug(ptr[11], reg, 11); \
fallthrough; \
case 10: write_debug(ptr[10], reg, 10); \
fallthrough; \
case 9: write_debug(ptr[9], reg, 9); \
fallthrough; \
case 8: write_debug(ptr[8], reg, 8); \
fallthrough; \
case 7: write_debug(ptr[7], reg, 7); \
fallthrough; \
case 6: write_debug(ptr[6], reg, 6); \
fallthrough; \
case 5: write_debug(ptr[5], reg, 5); \
fallthrough; \
case 4: write_debug(ptr[4], reg, 4); \
fallthrough; \
case 3: write_debug(ptr[3], reg, 3); \
fallthrough; \
case 2: write_debug(ptr[2], reg, 2); \
fallthrough; \
case 1: write_debug(ptr[1], reg, 1); \
fallthrough; \
default: write_debug(ptr[0], reg, 0); \
}
static struct kvm_guest_debug_arch *__vcpu_debug_regs(struct kvm_vcpu *vcpu)
{
switch (vcpu->arch.debug_owner) {
case VCPU_DEBUG_FREE:
WARN_ON_ONCE(1);
fallthrough;
case VCPU_DEBUG_GUEST_OWNED:
return &vcpu->arch.vcpu_debug_state;
case VCPU_DEBUG_HOST_OWNED:
return &vcpu->arch.external_debug_state;
}
return NULL;
}
static void __debug_save_state(struct kvm_guest_debug_arch *dbg,
struct kvm_cpu_context *ctxt)
{
int brps = *host_data_ptr(debug_brps);
int wrps = *host_data_ptr(debug_wrps);
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);
}
static void __debug_restore_state(struct kvm_guest_debug_arch *dbg,
struct kvm_cpu_context *ctxt)
{
int brps = *host_data_ptr(debug_brps);
int wrps = *host_data_ptr(debug_wrps);
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);
}
static inline void __debug_switch_to_guest_common(struct kvm_vcpu *vcpu)
{
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 (!kvm_debug_regs_in_use(vcpu))
return;
host_ctxt = host_data_ptr(host_ctxt);
guest_ctxt = &vcpu->arch.ctxt;
host_dbg = host_data_ptr(host_debug_state.regs);
guest_dbg = __vcpu_debug_regs(vcpu);
__debug_save_state(host_dbg, host_ctxt);
__debug_restore_state(guest_dbg, guest_ctxt);
}
static inline void __debug_switch_to_host_common(struct kvm_vcpu *vcpu)
{
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 (!kvm_debug_regs_in_use(vcpu))
return;
host_ctxt = host_data_ptr(host_ctxt);
guest_ctxt = &vcpu->arch.ctxt;
host_dbg = host_data_ptr(host_debug_state.regs);
guest_dbg = __vcpu_debug_regs(vcpu);
__debug_save_state(guest_dbg, guest_ctxt);
__debug_restore_state(host_dbg, host_ctxt);
}
#endif
