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[9/9] MIPS: KVM: Emulate generic QEMU machine on r6 T&E

Message ID 1467657315-19975-10-git-send-email-james.hogan@imgtec.com (mailing list archive)
State New, archived
Headers show

Commit Message

James Hogan July 4, 2016, 6:35 p.m. UTC 
Default the guest PRId register to represent a generic QEMU machine
instead of a 24kc on MIPSr6. 24kc isn't supported by r6 Linux kernels.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
---
 arch/mips/kvm/trap_emul.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)
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Patch

diff --git a/arch/mips/kvm/trap_emul.c b/arch/mips/kvm/trap_emul.c
index 00e8dc3d36cb..091553942bcb 100644
--- a/arch/mips/kvm/trap_emul.c
+++ b/arch/mips/kvm/trap_emul.c
@@ -431,9 +431,15 @@  static int kvm_trap_emul_vcpu_setup(struct kvm_vcpu *vcpu)
 
 	/*
 	 * Arch specific stuff, set up config registers properly so that the
-	 * guest will come up as expected, for now we simulate a MIPS 24kc
+	 * guest will come up as expected
 	 */
+#ifndef CONFIG_CPU_MIPSR6
+	/* r2-r5, simulate a MIPS 24kc */
 	kvm_write_c0_guest_prid(cop0, 0x00019300);
+#else
+	/* r6+, simulate a generic QEMU machine */
+	kvm_write_c0_guest_prid(cop0, 0x00010000);
+#endif
 	/*
 	 * Have config1, Cacheable, noncoherent, write-back, write allocate.
 	 * Endianness, arch revision & virtually tagged icache should match