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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2018-01-12 03:37:13 +0100 |
|---|---|---|
| committer | Paul Mackerras <paulus@ozlabs.org> | 2018-01-19 02:10:21 +0100 |
| commit | 2267ea7661798a42f0da648a2970e2a03f4bc370 (patch) | |
| tree | c81a43b275313a69d33b1f8276255739114863d0 /arch/powerpc/kvm/book3s_xive.c | |
| parent | KVM: PPC: Book3S HV: Enable use of the new XIVE "single escalation" feature (diff) | |
| download | linux-2267ea7661798a42f0da648a2970e2a03f4bc370.tar.xz linux-2267ea7661798a42f0da648a2970e2a03f4bc370.zip | |
KVM: PPC: Book3S HV: Don't use existing "prodded" flag for XIVE escalations
The prodded flag is only cleared at the beginning of H_CEDE,
so every time we have an escalation, we will cause the *next*
H_CEDE to return immediately.
Instead use a dedicated "irq_pending" flag to indicate that
a guest interrupt is pending for the VCPU. We don't reuse the
existing exception bitmap so as to avoid expensive atomic ops.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Diffstat (limited to 'arch/powerpc/kvm/book3s_xive.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_xive.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/powerpc/kvm/book3s_xive.c b/arch/powerpc/kvm/book3s_xive.c index a102efeabf05..eef9ccafdc09 100644 --- a/arch/powerpc/kvm/book3s_xive.c +++ b/arch/powerpc/kvm/book3s_xive.c @@ -84,8 +84,7 @@ static irqreturn_t xive_esc_irq(int irq, void *data) { struct kvm_vcpu *vcpu = data; - /* We use the existing H_PROD mechanism to wake up the target */ - vcpu->arch.prodded = 1; + vcpu->arch.irq_pending = 1; smp_mb(); if (vcpu->arch.ceded) kvmppc_fast_vcpu_kick(vcpu); |