Release 4.10 arch/arm64/kvm/hyp/debug-sr.c
/*
* Copyright (C) 2015 - ARM Ltd
* 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/>.
*/
#include <linux/compiler.h>
#include <linux/kvm_host.h>
#include <asm/debug-monitors.h>
#include <asm/kvm_asm.h>
#include <asm/kvm_hyp.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); \
case 14: ptr[14] = read_debug(reg, 14); \
case 13: ptr[13] = read_debug(reg, 13); \
case 12: ptr[12] = read_debug(reg, 12); \
case 11: ptr[11] = read_debug(reg, 11); \
case 10: ptr[10] = read_debug(reg, 10); \
case 9: ptr[9] = read_debug(reg, 9); \
case 8: ptr[8] = read_debug(reg, 8); \
case 7: ptr[7] = read_debug(reg, 7); \
case 6: ptr[6] = read_debug(reg, 6); \
case 5: ptr[5] = read_debug(reg, 5); \
case 4: ptr[4] = read_debug(reg, 4); \
case 3: ptr[3] = read_debug(reg, 3); \
case 2: ptr[2] = read_debug(reg, 2); \
case 1: ptr[1] = read_debug(reg, 1); \
default: ptr[0] = read_debug(reg, 0); \
}
#define restore_debug(ptr,reg,nr) \
switch (nr) { \
case 15: write_debug(ptr[15], reg, 15); \
case 14: write_debug(ptr[14], reg, 14); \
case 13: write_debug(ptr[13], reg, 13); \
case 12: write_debug(ptr[12], reg, 12); \
case 11: write_debug(ptr[11], reg, 11); \
case 10: write_debug(ptr[10], reg, 10); \
case 9: write_debug(ptr[9], reg, 9); \
case 8: write_debug(ptr[8], reg, 8); \
case 7: write_debug(ptr[7], reg, 7); \
case 6: write_debug(ptr[6], reg, 6); \
case 5: write_debug(ptr[5], reg, 5); \
case 4: write_debug(ptr[4], reg, 4); \
case 3: write_debug(ptr[3], reg, 3); \
case 2: write_debug(ptr[2], reg, 2); \
case 1: write_debug(ptr[1], reg, 1); \
default: write_debug(ptr[0], reg, 0); \
}
void __hyp_text __debug_save_state(struct kvm_vcpu *vcpu,
struct kvm_guest_debug_arch *dbg,
struct kvm_cpu_context *ctxt)
{
u64 aa64dfr0;
int brps, wrps;
if (!(vcpu->arch.debug_flags & KVM_ARM64_DEBUG_DIRTY))
return;
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_regs[MDCCINT_EL1] = read_sysreg(mdccint_el1);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| marc zyngier | marc zyngier | 126 | 100.00% | 1 | 100.00% |
| Total | 126 | 100.00% | 1 | 100.00% |
void __hyp_text __debug_restore_state(struct kvm_vcpu *vcpu,
struct kvm_guest_debug_arch *dbg,
struct kvm_cpu_context *ctxt)
{
u64 aa64dfr0;
int brps, wrps;
if (!(vcpu->arch.debug_flags & KVM_ARM64_DEBUG_DIRTY))
return;
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_regs[MDCCINT_EL1], mdccint_el1);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| marc zyngier | marc zyngier | 126 | 100.00% | 1 | 100.00% |
| Total | 126 | 100.00% | 1 | 100.00% |
void __hyp_text __debug_cond_save_host_state(struct kvm_vcpu *vcpu)
{
/* If any of KDE, MDE or KVM_ARM64_DEBUG_DIRTY is set, perform
* a full save/restore cycle. */
if ((vcpu->arch.ctxt.sys_regs[MDSCR_EL1] & DBG_MDSCR_KDE) ||
(vcpu->arch.ctxt.sys_regs[MDSCR_EL1] & DBG_MDSCR_MDE))
vcpu->arch.debug_flags |= KVM_ARM64_DEBUG_DIRTY;
__debug_save_state(vcpu, &vcpu->arch.host_debug_state,
kern_hyp_va(vcpu->arch.host_cpu_context));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| marc zyngier | marc zyngier | 73 | 100.00% | 1 | 100.00% |
| Total | 73 | 100.00% | 1 | 100.00% |
void __hyp_text __debug_cond_restore_host_state(struct kvm_vcpu *vcpu)
{
__debug_restore_state(vcpu, &vcpu->arch.host_debug_state,
kern_hyp_va(vcpu->arch.host_cpu_context));
if (vcpu->arch.debug_flags & KVM_ARM64_DEBUG_DIRTY)
vcpu->arch.debug_flags &= ~KVM_ARM64_DEBUG_DIRTY;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| marc zyngier | marc zyngier | 51 | 100.00% | 1 | 100.00% |
| Total | 51 | 100.00% | 1 | 100.00% |
u32 __hyp_text __kvm_get_mdcr_el2(void)
{
return read_sysreg(mdcr_el2);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| marc zyngier | marc zyngier | 13 | 92.86% | 1 | 50.00% |
| christoffer dall | christoffer dall | 1 | 7.14% | 1 | 50.00% |
| Total | 14 | 100.00% | 2 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| marc zyngier | marc zyngier | 446 | 99.11% | 3 | 60.00% |
| ard biesheuvel | ard biesheuvel | 3 | 0.67% | 1 | 20.00% |
| christoffer dall | christoffer dall | 1 | 0.22% | 1 | 20.00% |
| Total | 450 | 100.00% | 5 | 100.00% |
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