diff options
| author | James Hogan <james.hogan@imgtec.com> | 2014-05-29 10:16:38 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-05-30 13:02:54 +0200 |
| commit | f74a8e224e32edccade63a23bc260b141b067b1d (patch) | |
| tree | b79412e24fa3b7a059232871982f71bd1f8d2ff3 /arch/mips/include/uapi/asm/kvm.h | |
| parent | f82393426afb7c82f7618b3b4e440d8dd2b40c08 (diff) | |
MIPS: KVM: Add count frequency KVM register
Expose the KVM guest CP0_Count frequency to userland via a new
KVM_REG_MIPS_COUNT_HZ register accessible with the KVM_{GET,SET}_ONE_REG
ioctls.
When the frequency is altered the bias is adjusted such that the guest
CP0_Count doesn't jump discontinuously or lose any timer interrupts.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: kvm@vger.kernel.org
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: David Daney <david.daney@cavium.com>
Cc: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/mips/include/uapi/asm/kvm.h')
| -rw-r--r-- | arch/mips/include/uapi/asm/kvm.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/mips/include/uapi/asm/kvm.h b/arch/mips/include/uapi/asm/kvm.h index f859fbada1f7..2c04b6d9ff85 100644 --- a/arch/mips/include/uapi/asm/kvm.h +++ b/arch/mips/include/uapi/asm/kvm.h @@ -133,6 +133,13 @@ struct kvm_fpu { */ #define KVM_REG_MIPS_COUNT_RESUME (KVM_REG_MIPS | KVM_REG_SIZE_U64 | \ 0x20000 | 1) +/* + * CP0_Count rate in Hz + * Specifies the rate of the CP0_Count timer in Hz. Modifications occur without + * discontinuities in CP0_Count. + */ +#define KVM_REG_MIPS_COUNT_HZ (KVM_REG_MIPS | KVM_REG_SIZE_U64 | \ + 0x20000 | 2) /* * KVM MIPS specific structures and definitions |