Patchwork [5/8] kvm/ppc: Call trace_hardirqs_on before entry

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Submitter Scott Wood
Date June 7, 2013, 12:16 a.m.
Message ID <1370564196-3821-6-git-send-email-scottwood@freescale.com>
Download mbox | patch
Permalink /patch/249566/
State New
Headers show

Comments

Scott Wood - June 7, 2013, 12:16 a.m.
Currently this is only being done on 64-bit.  Rather than just move it
out of the 64-bit ifdef, move it to kvm_lazy_ee_enable() so that it is
consistent with lazy ee state, and so that we don't track more host
code as interrupts-enabled than necessary.

Rename kvm_lazy_ee_enable() to kvm_fix_ee_before_entry() to reflect
that this function now has a role on 32-bit as well.

Signed-off-by: Scott Wood <scottwood@freescale.com>
---
 arch/powerpc/include/asm/kvm_ppc.h |   11 ++++++++---
 arch/powerpc/kvm/book3s_pr.c       |    4 ++--
 arch/powerpc/kvm/booke.c           |    4 ++--
 arch/powerpc/kvm/powerpc.c         |    2 --
 4 files changed, 12 insertions(+), 9 deletions(-)

Patch

diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h
index a5287fe..6885846 100644
--- a/arch/powerpc/include/asm/kvm_ppc.h
+++ b/arch/powerpc/include/asm/kvm_ppc.h
@@ -394,10 +394,15 @@  static inline void kvmppc_mmu_flush_icache(pfn_t pfn)
 	}
 }
 
-/* Please call after prepare_to_enter. This function puts the lazy ee state
-   back to normal mode, without actually enabling interrupts. */
-static inline void kvmppc_lazy_ee_enable(void)
+/*
+ * Please call after prepare_to_enter. This function puts the lazy ee and irq
+ * disabled tracking state back to normal mode, without actually enabling
+ * interrupts.
+ */
+static inline void kvmppc_fix_ee_before_entry(void)
 {
+	trace_hardirqs_on();
+
 #ifdef CONFIG_PPC64
 	/* Only need to enable IRQs by hard enabling them after this */
 	local_paca->irq_happened = 0;
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index bdc40b8..0b97ce4 100644
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -890,7 +890,7 @@  program_interrupt:
 			local_irq_enable();
 			r = s;
 		} else {
-			kvmppc_lazy_ee_enable();
+			kvmppc_fix_ee_before_entry();
 		}
 	}
 
@@ -1161,7 +1161,7 @@  int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 	if (vcpu->arch.shared->msr & MSR_FP)
 		kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
 
-	kvmppc_lazy_ee_enable();
+	kvmppc_fix_ee_before_entry();
 
 	ret = __kvmppc_vcpu_run(kvm_run, vcpu);
 
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index 5cd7ad0..08f4aa1 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -673,7 +673,7 @@  int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 		ret = s;
 		goto out;
 	}
-	kvmppc_lazy_ee_enable();
+	kvmppc_fix_ee_before_entry();
 
 	kvm_guest_enter();
 
@@ -1167,7 +1167,7 @@  int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 			local_irq_enable();
 			r = (s << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
 		} else {
-			kvmppc_lazy_ee_enable();
+			kvmppc_fix_ee_before_entry();
 		}
 	}
 
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 6316ee3..4e05f8c 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -117,8 +117,6 @@  int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
 			kvm_guest_exit();
 			continue;
 		}
-
-		trace_hardirqs_on();
 #endif
 
 		kvm_guest_enter();