[PATCH v2 1/7] KVM: arm64: Fix missing RES1 in emulation of DBGBIDR
From: Marc Zyngier <maz@kernel.org>
Date: 2021-01-25 12:30:00
Also in:
kvm, kvmarm
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
The AArch32 CP14 DBGDIDR has bit 15 set to RES1, which our current emulation doesn't set. Just add the missing bit. Reported-by: Peter Maydell <redacted> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <maz@kernel.org> --- arch/arm64/kvm/sys_regs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 3313dedfa505..0c0832472c4a 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c@@ -1711,7 +1711,7 @@ static bool trap_dbgidr(struct kvm_vcpu *vcpu, p->regval = ((((dfr >> ID_AA64DFR0_WRPS_SHIFT) & 0xf) << 28) | (((dfr >> ID_AA64DFR0_BRPS_SHIFT) & 0xf) << 24) | (((dfr >> ID_AA64DFR0_CTX_CMPS_SHIFT) & 0xf) << 20) - | (6 << 16) | (el3 << 14) | (el3 << 12)); + | (6 << 16) | (1 << 15) | (el3 << 14) | (el3 << 12)); return true; } }
--
2.29.2
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel