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Commit 688cded3 authored by David Daney's avatar David Daney Committed by Gleb Natapov
Browse files

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



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

Signed-off-by: default avatarDavid Daney <david.daney@cavium.com>
Acked-by: default avatarSanjay Lal <sanjayl@kymasys.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 1f3dc6d7

arch/mips/include/uapi/asm/kvm.h

+11 −5
Original line number Diff line number Diff line
@@ -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];

};