diff options
| author | James Hogan <james.hogan@imgtec.com> | 2017-03-14 10:15:38 +0000 |
|---|---|---|
| committer | James Hogan <james.hogan@imgtec.com> | 2017-03-28 14:53:58 +0100 |
| commit | d42a008f86ba3d715d31788fc5143a4de5685d33 (patch) | |
| tree | e8e8a3abb6b6111229af71901ec0995e375abac9 /arch/mips/include/uapi | |
| parent | 273819a6a5ab493500c14889b161bf5bc2265736 (diff) | |
KVM: MIPS/VZ: Emulate MAARs when necessary
Add emulation of Memory Accessibility Attribute Registers (MAARs) when
necessary. We can't actually do anything with whatever the guest
provides, but it may not be possible to clear Guest.Config5.MRP so we
have to emulate at least a pair of MAARs.
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: Jonathan Corbet <corbet@lwn.net>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Cc: linux-doc@vger.kernel.org
Diffstat (limited to 'arch/mips/include/uapi')
| -rw-r--r-- | arch/mips/include/uapi/asm/kvm.h | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/arch/mips/include/uapi/asm/kvm.h b/arch/mips/include/uapi/asm/kvm.h index a8a0199bf760..3107095d7f0a 100644 --- a/arch/mips/include/uapi/asm/kvm.h +++ b/arch/mips/include/uapi/asm/kvm.h @@ -54,9 +54,14 @@ struct kvm_fpu { * Register set = 0: GP registers from kvm_regs (see definitions below). * * Register set = 1: CP0 registers. - * bits[15..8] - Must be zero. - * bits[7..3] - Register 'rd' index. - * bits[2..0] - Register 'sel' index. + * bits[15..8] - COP0 register set. + * + * COP0 register set = 0: Main CP0 registers. + * bits[7..3] - Register 'rd' index. + * bits[2..0] - Register 'sel' index. + * + * COP0 register set = 1: MAARs. + * bits[7..0] - MAAR index. * * Register set = 2: KVM specific registers (see definitions below). * @@ -115,6 +120,15 @@ struct kvm_fpu { /* + * KVM_REG_MIPS_CP0 - Coprocessor 0 registers. + */ + +#define KVM_REG_MIPS_MAAR (KVM_REG_MIPS_CP0 | (1 << 8)) +#define KVM_REG_MIPS_CP0_MAAR(n) (KVM_REG_MIPS_MAAR | \ + KVM_REG_SIZE_U64 | (n)) + + +/* * KVM_REG_MIPS_KVM - KVM specific control registers. */ |