Re: [PATCH][v2] KVM: PPC: e500: Emulate TMCFG0 TMRN register

[Paul Mackerras]

On Fri, Sep 25, 2015 at 06:02:23PM +0300, Laurentiu Tudor wrote:
> Emulate TMCFG0 TMRN register exposing one HW thread per vcpu.
> 
> Signed-off-by: Mihai Caraman 
> [laurentiu.tu...@freescale.com: rebased on latest kernel, use
>  define instead of hardcoded value, moved code in own function]
> Signed-off-by: Laurentiu Tudor 

Thanks, applied to my kvm-ppc-next branch.

Paul.
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Re: [PATCH][v2] KVM: PPC: e500: Emulate TMCFG0 TMRN register

[Paul Mackerras]

On Fri, Sep 25, 2015 at 06:02:23PM +0300, Laurentiu Tudor wrote:
> Emulate TMCFG0 TMRN register exposing one HW thread per vcpu.
> 
> Signed-off-by: Mihai Caraman 
> [laurentiu.tu...@freescale.com: rebased on latest kernel, use
>  define instead of hardcoded value, moved code in own function]
> Signed-off-by: Laurentiu Tudor 

Thanks, applied to my kvm-ppc-next branch.

Paul.
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Re: [PATCH][v2] KVM: PPC: e500: Emulate TMCFG0 TMRN register

[Scott Wood]

On Fri, 2015-09-25 at 18:02 +0300, Laurentiu Tudor wrote:
> Emulate TMCFG0 TMRN register exposing one HW thread per vcpu.
> 
> Signed-off-by: Mihai Caraman 
> [laurentiu.tu...@freescale.com: rebased on latest kernel, use
>  define instead of hardcoded value, moved code in own function]
> Signed-off-by: Laurentiu Tudor 
> ---
> v2:
>  - moved code in its own function
> Needs this patch: https://patchwork.ozlabs.org/patch/521752/
> 
>  arch/powerpc/include/asm/disassemble.h |  5 +
>  arch/powerpc/kvm/e500_emulate.c| 19 +++
>  2 files changed, 24 insertions(+)

Acked-by: Scott Wood 

-Scott

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Re: [PATCH][v2] KVM: PPC: e500: Emulate TMCFG0 TMRN register

[Scott Wood]

On Fri, 2015-09-25 at 18:02 +0300, Laurentiu Tudor wrote:
> Emulate TMCFG0 TMRN register exposing one HW thread per vcpu.
> 
> Signed-off-by: Mihai Caraman 
> [laurentiu.tu...@freescale.com: rebased on latest kernel, use
>  define instead of hardcoded value, moved code in own function]
> Signed-off-by: Laurentiu Tudor 
> ---
> v2:
>  - moved code in its own function
> Needs this patch: https://patchwork.ozlabs.org/patch/521752/
> 
>  arch/powerpc/include/asm/disassemble.h |  5 +
>  arch/powerpc/kvm/e500_emulate.c| 19 +++
>  2 files changed, 24 insertions(+)

Acked-by: Scott Wood 

-Scott

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[PATCH][v2] KVM: PPC: e500: Emulate TMCFG0 TMRN register

[Laurentiu Tudor]

Emulate TMCFG0 TMRN register exposing one HW thread per vcpu.

Signed-off-by: Mihai Caraman 
[laurentiu.tu...@freescale.com: rebased on latest kernel, use
 define instead of hardcoded value, moved code in own function]
Signed-off-by: Laurentiu Tudor 
---
v2:
 - moved code in its own function
Needs this patch: https://patchwork.ozlabs.org/patch/521752/

 arch/powerpc/include/asm/disassemble.h |  5 +
 arch/powerpc/kvm/e500_emulate.c| 19 +++
 2 files changed, 24 insertions(+)

diff --git a/arch/powerpc/include/asm/disassemble.h 
b/arch/powerpc/include/asm/disassemble.h
index 6330a61..4852e84 100644
--- a/arch/powerpc/include/asm/disassemble.h
+++ b/arch/powerpc/include/asm/disassemble.h
@@ -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;
diff --git a/arch/powerpc/kvm/e500_emulate.c b/arch/powerpc/kvm/e500_emulate.c
index ce7291c..990db69 100644
--- a/arch/powerpc/kvm/e500_emulate.c
+++ b/arch/powerpc/kvm/e500_emulate.c
@@ -15,6 +15,7 @@
 #include 
 #include 
 #include 
+#include 
 
 #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);
-- 
1.8.3.1
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