The current VFIO-on-POWER implementation supports only user mode
driven mapping, i.e. QEMU is sending requests to map/unmap pages.
However this approach is really slow, so we want to move that to KVM.
Since H_PUT_TCE can be extremely performance sensitive (especially with
network adapters where
This adds real mode handlers for the H_PUT_TCE_INDIRECT and
H_STUFF_TCE hypercalls for QEMU emulated devices such as IBMVIO
devices or emulated PCI. These calls allow adding multiple entries
(up to 512) into the TCE table in one call which saves time on
transition to/from real mode.
This adds a
This allows the host kernel to handle H_PUT_TCE, H_PUT_TCE_INDIRECT
and H_STUFF_TCE requests without passing them to QEMU, which should
save time on switching to QEMU and back.
Both real and virtual modes are supported - whenever the kernel
fails to handle TCE request, it passes it to the virtual
This adds special support for huge pages (16MB). The reference
counting cannot be easily done for such pages in real mode (when
MMU is off) so we added a list of huge pages. It is populated in
virtual mode and get_page is called just once per a huge page.
Real mode handlers check if the
-Original Message-
From: Wood Scott-B07421
Sent: Wednesday, June 05, 2013 12:39 AM
To: Caraman Mihai Claudiu-B02008
Cc: kvm-ppc@vger.kernel.org; k...@vger.kernel.org; linuxppc-
d...@lists.ozlabs.org; Alexander Graf
Subject: Re: [RFC PATCH 0/6] KVM: PPC: Book3E: AltiVec support
On
+ /*
+* The interrupt is shared, KVM support for the
featured unit
+* is detected at run-time.
+*/
This is a decent comment for the changelog, but for the code itself it
seems fairly obvious if you look at the definition of
-Original Message-
From: Wood Scott-B07421
Sent: Wednesday, June 05, 2013 1:28 AM
To: Caraman Mihai Claudiu-B02008
Cc: kvm-ppc@vger.kernel.org; k...@vger.kernel.org; linuxppc-
d...@lists.ozlabs.org; Caraman Mihai Claudiu-B02008
Subject: Re: [RFC PATCH 3/6] KVM: PPC: Book3E: Rename
+ * Simulate AltiVec unavailable fault to load guest state
+ * from thread to AltiVec unit.
+ * It requires to be called with preemption disabled.
+ */
+static inline void kvmppc_load_guest_altivec(struct kvm_vcpu *vcpu)
+{
+#ifdef CONFIG_ALTIVEC
+ if
On 06/05/2013 02:10:07 AM, Caraman Mihai Claudiu-B02008 wrote:
-Original Message-
From: Wood Scott-B07421
Sent: Wednesday, June 05, 2013 12:39 AM
To: Caraman Mihai Claudiu-B02008
Cc: kvm-ppc@vger.kernel.org; k...@vger.kernel.org; linuxppc-
d...@lists.ozlabs.org; Alexander Graf
On 06/05/2013 02:29:47 AM, Caraman Mihai Claudiu-B02008 wrote:
case BOOKE_INTERRUPT_SPE_FP_ROUND:
+#ifdef CONFIG_SPE
kvmppc_booke_queue_irqprio(vcpu,
BOOKE_IRQPRIO_SPE_FP_ROUND);
r = RESUME_GUEST;
break;
Why not use
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