git: f579cc44981b - stable/15 - arm64/vmm: Add missing debug traps

The branch stable/15 has been updated by andrew:

URL: https://cgit.FreeBSD.org/src/commit/?id=f579cc44981b70a7a6315dce953a3df8b63a3984

commit f579cc44981b70a7a6315dce953a3df8b63a3984
Author:     Andrew Turner <andrew@FreeBSD.org>
AuthorDate: 2025-10-02 15:35:11 +0000
Commit:     Andrew Turner <andrew@FreeBSD.org>
CommitDate: 2025-10-09 16:31:50 +0000

    arm64/vmm: Add missing debug traps
    
    These are features we don't support or advertise to the guest so can
    safely be trapped.
    
    Sponsored by:   Arm Ltd
    Differential Revision:  https://reviews.freebsd.org/D52806
    
    (cherry picked from commit c67ea2707d2b5e6deb5986710f520ff69e4f78a3)
---
 sys/arm64/vmm/vmm_reset.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sys/arm64/vmm/vmm_reset.c b/sys/arm64/vmm/vmm_reset.c
index c4102277131d..1240c3ed16ec 100644
--- a/sys/arm64/vmm/vmm_reset.c
+++ b/sys/arm64/vmm/vmm_reset.c
@@ -145,7 +145,8 @@ reset_vm_el2_regs(void *vcpu)
 	/* Set the Extended Hypervisor Configuration Register */
 	el2ctx->hcrx_el2 = 0;
 	/* TODO: Trap all extensions we don't support */
-	el2ctx->mdcr_el2 = 0;
+	el2ctx->mdcr_el2 = MDCR_EL2_TDOSA | MDCR_EL2_TDRA | MDCR_EL2_TPMS |
+	    MDCR_EL2_TTRF;
 	/* PMCR_EL0.N is read from MDCR_EL2.HPMN */
 	el2ctx->mdcr_el2 |= (el2ctx->pmcr_el0 & PMCR_N_MASK) >> PMCR_N_SHIFT;