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mips/kvm: Fix ABI for use of 64-bit registers.

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All registers are 64-bits wide, 32-bit guests use the least
significant portion of the register storage fields.

Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
David Daney 2013-05-23 09:49:06 -07:00 committed by Gleb Natapov
parent 1f3dc6d764
commit 688cded320
1 changed files with 11 additions and 5 deletions
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16
arch/mips/include/uapi/asm/kvm.h
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@ -18,12 +18,18 @@
#define N_MIPS_COPROC_REGS 32
#define N_MIPS_COPROC_SEL 8
/* for KVM_GET_REGS and KVM_SET_REGS */
/*
* for KVM_GET_REGS and KVM_SET_REGS
*
* If Config[AT] is zero (32-bit CPU), the register contents are
* stored in the lower 32-bits of the struct kvm_regs fields and sign
* extended to 64-bits.
*/
struct kvm_regs {
__u32 gprs[32];
__u32 hi;
__u32 lo;
__u32 pc;
__u64 gprs[32];
__u64 hi;
__u64 lo;
__u64 pc;
__u32 cp0reg[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL];
};