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diff --git a/sys/arm64/vmm/arm64.h b/sys/arm64/vmm/arm64.h
--- a/sys/arm64/vmm/arm64.h
+++ b/sys/arm64/vmm/arm64.h
@@ -87,6 +87,7 @@
uint64_t pmevcntr_el0[31];
uint64_t pmevtyper_el0[31];
+ uint64_t dbgclaimset_el1;
uint64_t dbgbcr_el1[16]; /* Debug Breakpoint Control Registers */
uint64_t dbgbvr_el1[16]; /* Debug Breakpoint Value Registers */
uint64_t dbgwcr_el1[16]; /* Debug Watchpoint Control Registers */
diff --git a/sys/arm64/vmm/vmm_hyp.c b/sys/arm64/vmm/vmm_hyp.c
--- a/sys/arm64/vmm/vmm_hyp.c
+++ b/sys/arm64/vmm/vmm_hyp.c
@@ -121,6 +121,8 @@
}
}
+ hypctx->dbgclaimset_el1 = READ_SPECIALREG(dbgclaimset_el1);
+
dfr0 = READ_SPECIALREG(id_aa64dfr0_el1);
switch (ID_AA64DFR0_BRPs_VAL(dfr0) - 1) {
#define STORE_DBG_BRP(x) \
@@ -394,6 +396,9 @@
#undef LOAD_PMU
}
+ WRITE_SPECIALREG(dbgclaimclr_el1, ~0ul);
+ WRITE_SPECIALREG(dbgclaimclr_el1, hypctx->dbgclaimset_el1);
+
dfr0 = READ_SPECIALREG(id_aa64dfr0_el1);
switch (ID_AA64DFR0_BRPs_VAL(dfr0) - 1) {
#define LOAD_DBG_BRP(x) \

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