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KVM: PPC: e500: Emulate TMCFG0 TMRN register 

Emulate TMCFG0 TMRN register exposing one HW thread per vcpu.

Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com>
[Laurentiu.Tudor@freescale.com: rebased on latest kernel, use
 define instead of hardcoded value, moved code in own function]
Signed-off-by: Laurentiu Tudor <Laurentiu.Tudor@freescale.com>
Acked-by: Scott Wood <scotttwood@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Tudor Laurentiu 2015-09-25 18:02:23 +03:00 committed by Paul Mackerras
parent d4cd4f9586
commit 2daab50e17
2 changed files with 24 additions and 0 deletions
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5
arch/powerpc/include/asm/disassemble.h
View File

@ -42,6 +42,11 @@ static inline unsigned int get_dcrn(u32 inst)
return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
}
static inline unsigned int get_tmrn(u32 inst)
{
return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
}
static inline unsigned int get_rt(u32 inst)
{
return (inst >> 21) & 0x1f;

19
arch/powerpc/kvm/e500_emulate.c
View File

@ -15,6 +15,7 @@
#include <asm/kvm_ppc.h>
#include <asm/disassemble.h>
#include <asm/dbell.h>
#include <asm/reg_booke.h>
#include "booke.h"
#include "e500.h"
@ -22,6 +23,7 @@
#define XOP_DCBTLS 166
#define XOP_MSGSND 206
#define XOP_MSGCLR 238
#define XOP_MFTMR 366
#define XOP_TLBIVAX 786
#define XOP_TLBSX 914
#define XOP_TLBRE 946
@ -113,6 +115,19 @@ static int kvmppc_e500_emul_dcbtls(struct kvm_vcpu *vcpu)
return EMULATE_DONE;
}
static int kvmppc_e500_emul_mftmr(struct kvm_vcpu *vcpu, unsigned int inst,
int rt)
{
/* Expose one thread per vcpu */
if (get_tmrn(inst) == TMRN_TMCFG0) {
kvmppc_set_gpr(vcpu, rt,
1 | (1 << TMRN_TMCFG0_NATHRD_SHIFT));
return EMULATE_DONE;
}
return EMULATE_FAIL;
}
int kvmppc_core_emulate_op_e500(struct kvm_run *run, struct kvm_vcpu *vcpu,
unsigned int inst, int *advance)
{
@ -165,6 +180,10 @@ int kvmppc_core_emulate_op_e500(struct kvm_run *run, struct kvm_vcpu *vcpu,
emulated = kvmppc_e500_emul_tlbivax(vcpu, ea);
break;
case XOP_MFTMR:
emulated = kvmppc_e500_emul_mftmr(vcpu, inst, rt);
break;
case XOP_EHPRIV:
emulated = kvmppc_e500_emul_ehpriv(run, vcpu, inst,
advance);