From: Alexander Graf <agraf@suse.de>
To: <kvm-ppc@vger.kernel.org> <kvm-ppc@vger.kernel.org>
Cc: Scott Wood <scottwood@freescale.com>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
list <kvm@vger.kernel.org>
Subject: [PATCH 16/30] KVM: PPC: e500mc: Add doorbell emulation support
Date: Fri, 17 Feb 2012 17:56:44 +0100 [thread overview]
Message-ID: <1329497818-9729-17-git-send-email-agraf@suse.de> (raw)
In-Reply-To: <1329497818-9729-1-git-send-email-agraf@suse.de>
When one vcpu wants to kick another, it can issue a special IPI instruction
called msgsnd. This patch emulates this instruction, its clearing counterpart
and the infrastructure required to actually trigger that interrupt inside
a guest vcpu.
With this patch, SMP guests on e500mc work.
Signed-off-by: Alexander Graf <agraf@suse.de>
---
arch/powerpc/kvm/booke.c | 6 +++
arch/powerpc/kvm/e500_emulate.c | 68 +++++++++++++++++++++++++++++++++++++++
2 files changed, 74 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index 3dd200d..ce1599d 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -326,6 +326,9 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
int_class = INT_CLASS_NONCRIT;
break;
case BOOKE_IRQPRIO_CRITICAL:
+#ifdef CONFIG_KVM_E500MC
+ case BOOKE_IRQPRIO_DBELL_CRIT:
+#endif
allowed = vcpu->arch.shared->msr & MSR_CE;
allowed = allowed && !crit;
msr_mask = MSR_GS | MSR_ME;
@@ -342,6 +345,9 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
keep_irq = true;
/* fall through */
case BOOKE_IRQPRIO_EXTERNAL:
+#ifdef CONFIG_KVM_E500MC
+ case BOOKE_IRQPRIO_DBELL:
+#endif
allowed = vcpu->arch.shared->msr & MSR_EE;
allowed = allowed && !crit;
msr_mask = MSR_GS | MSR_CE | MSR_ME | MSR_DE;
diff --git a/arch/powerpc/kvm/e500_emulate.c b/arch/powerpc/kvm/e500_emulate.c
index 98b6c1c..29d5604 100644
--- a/arch/powerpc/kvm/e500_emulate.c
+++ b/arch/powerpc/kvm/e500_emulate.c
@@ -14,16 +14,74 @@
#include <asm/kvm_ppc.h>
#include <asm/disassemble.h>
+#include <asm/dbell.h>
#include "booke.h"
#include "e500.h"
+#define XOP_MSGSND 206
+#define XOP_MSGCLR 238
#define XOP_TLBIVAX 786
#define XOP_TLBSX 914
#define XOP_TLBRE 946
#define XOP_TLBWE 978
#define XOP_TLBILX 18
+#ifdef CONFIG_KVM_E500MC
+static int dbell2prio(ulong param)
+{
+ int msg = param & PPC_DBELL_TYPE(-1);
+ int prio = -1;
+
+ switch (msg) {
+ case PPC_DBELL_TYPE(PPC_DBELL):
+ prio = BOOKE_IRQPRIO_DBELL;
+ break;
+ case PPC_DBELL_TYPE(PPC_DBELL_CRIT):
+ prio = BOOKE_IRQPRIO_DBELL_CRIT;
+ break;
+ default:
+ break;
+ }
+
+ return prio;
+}
+
+static int kvmppc_e500_emul_msgclr(struct kvm_vcpu *vcpu, int rb)
+{
+ ulong param = vcpu->arch.gpr[rb];
+ int prio = dbell2prio(param);
+
+ if (prio < 0)
+ return EMULATE_FAIL;
+
+ clear_bit(prio, &vcpu->arch.pending_exceptions);
+ return EMULATE_DONE;
+}
+
+static int kvmppc_e500_emul_msgsnd(struct kvm_vcpu *vcpu, int rb)
+{
+ ulong param = vcpu->arch.gpr[rb];
+ int prio = dbell2prio(rb);
+ int pir = param & 0x3fff;
+ int i;
+ struct kvm_vcpu *cvcpu;
+
+ if (prio < 0)
+ return EMULATE_FAIL;
+
+ kvm_for_each_vcpu(i, cvcpu, vcpu->kvm) {
+ int cpir = cvcpu->arch.shared->pir;
+ if ((param & PPC_DBELL_MSG_BRDCAST) || (cpir == pir)) {
+ set_bit(prio, &cvcpu->arch.pending_exceptions);
+ kvm_vcpu_kick(cvcpu);
+ }
+ }
+
+ return EMULATE_DONE;
+}
+#endif
+
int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
unsigned int inst, int *advance)
{
@@ -36,6 +94,16 @@ int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
case 31:
switch (get_xop(inst)) {
+#ifdef CONFIG_KVM_E500MC
+ case XOP_MSGSND:
+ emulated = kvmppc_e500_emul_msgsnd(vcpu, get_rb(inst));
+ break;
+
+ case XOP_MSGCLR:
+ emulated = kvmppc_e500_emul_msgclr(vcpu, get_rb(inst));
+ break;
+#endif
+
case XOP_TLBRE:
emulated = kvmppc_e500_emul_tlbre(vcpu);
break;
--
1.6.0.2
next prev parent reply other threads:[~2012-02-17 16:57 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-17 16:56 [PATCH 00/30] KVM: PPC: e500mc support Alexander Graf
2012-02-17 16:56 ` [PATCH 01/30] powerpc/booke: Set CPU_FTR_DEBUG_LVL_EXC on 32-bit Alexander Graf
2012-02-17 16:56 ` [PATCH 02/30] powerpc/e500: split CPU_FTRS_ALWAYS/CPU_FTRS_POSSIBLE Alexander Graf
2012-02-17 16:56 ` [PATCH 03/30] KVM: PPC: factor out lpid allocator from book3s_64_mmu_hv Alexander Graf
2012-02-17 16:56 ` [PATCH 04/30] KVM: PPC: booke: add booke-level vcpu load/put Alexander Graf
2012-02-17 16:56 ` [PATCH 05/30] KVM: PPC: booke: Move vm core init/destroy out of booke.c Alexander Graf
2012-02-17 16:56 ` [PATCH 06/30] KVM: PPC: e500: rename e500_tlb.h to e500.h Alexander Graf
2012-02-17 16:56 ` [PATCH 07/30] KVM: PPC: e500: merge <asm/kvm_e500.h> into arch/powerpc/kvm/e500.h Alexander Graf
2012-02-17 16:56 ` [PATCH 08/30] KVM: PPC: e500: clean up arch/powerpc/kvm/e500.h Alexander Graf
2012-02-17 16:56 ` [PATCH 09/30] KVM: PPC: e500: refactor core-specific TLB code Alexander Graf
2012-02-17 16:56 ` [PATCH 10/30] KVM: PPC: e500: Track TLB1 entries with a bitmap Alexander Graf
2012-02-17 16:56 ` [PATCH 11/30] KVM: PPC: e500: emulate tlbilx Alexander Graf
2012-02-17 16:56 ` [PATCH 12/30] powerpc/booke: Provide exception macros with interrupt name Alexander Graf
2012-02-17 16:56 ` [PATCH 13/30] KVM: PPC: booke: category E.HV (GS-mode) support Alexander Graf
2012-02-17 16:56 ` [PATCH 14/30] KVM: PPC: booke: standard PPC floating point support Alexander Graf
2012-02-17 16:56 ` [PATCH 15/30] KVM: PPC: e500mc support Alexander Graf
2012-02-17 16:56 ` Alexander Graf [this message]
2012-02-17 16:56 ` [PATCH 17/30] KVM: PPC: e500mc: implicitly set MSR_GS Alexander Graf
2012-02-17 16:56 ` [PATCH 18/30] KVM: PPC: e500mc: Move r1/r2 restoration very early Alexander Graf
2012-02-17 16:56 ` [PATCH 19/30] KVM: PPC: e500mc: add load inst fixup Alexander Graf
2012-02-17 16:56 ` [PATCH 20/30] KVM: PPC: rename CONFIG_KVM_E500 -> CONFIG_KVM_E500V2 Alexander Graf
2012-02-17 16:56 ` [PATCH 21/30] KVM: PPC: make e500v2 and e500mc mutually exclusive Alexander Graf
2012-02-17 22:32 ` Tabi Timur-B04825
2012-02-17 23:27 ` Alexander Graf
2012-02-17 16:56 ` [PATCH 22/30] KVM: PPC: booke: remove leftover debugging Alexander Graf
2012-02-17 16:56 ` [PATCH 23/30] KVM: PPC: booke: deliver program int on emulation failure Alexander Graf
2012-02-17 16:56 ` [PATCH 24/30] KVM: PPC: booke: call resched after every exit Alexander Graf
2012-02-17 16:56 ` [PATCH 25/30] KVM: PPC: booke: BOOKE_IRQPRIO_MAX is n+1 Alexander Graf
2012-02-17 16:56 ` [PATCH 26/30] KVM: PPC: bookehv: fix exit timing Alexander Graf
2012-02-17 16:56 ` [PATCH 27/30] KVM: PPC: bookehv: remove negation for CONFIG_64BIT Alexander Graf
2012-02-17 16:56 ` [PATCH 28/30] KVM: PPC: bookehv: remove SET_VCPU Alexander Graf
2012-02-17 16:56 ` [PATCH 29/30] KVM: PPC: bookehv: disable MAS register updates early Alexander Graf
2012-02-17 16:56 ` [PATCH 30/30] KVM: PPC: bookehv: add comment about shadow_msr Alexander Graf
2012-02-17 17:13 [PATCH 00/30] KVM: PPC: e500mc support Alexander Graf
2012-02-17 17:13 ` [PATCH 16/30] KVM: PPC: e500mc: Add doorbell emulation support Alexander Graf
2012-02-17 21:55 ` Scott Wood
2012-02-17 21:57 ` Scott Wood
2012-02-20 11:49 ` Alexander Graf
2012-02-20 15:39 ` Scott Wood
2012-02-20 15:42 ` Alexander Graf
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