From: Alexey Kardashevskiy <aik@ozlabs.ru>
To: qemu-devel@nongnu.org
Cc: Alexey Kardashevskiy <aik@ozlabs.ru>,
qemu-ppc@nongnu.org, David Gibson <david@gibson.dropbear.id.au>
Subject: [Qemu-devel] [PATCH qemu 2/2] spapr_pci: Advertise 16M IOMMU pages when available
Date: Thu, 22 Dec 2016 16:22:12 +1100 [thread overview]
Message-ID: <20161222052212.49006-3-aik@ozlabs.ru> (raw)
In-Reply-To: <20161222052212.49006-1-aik@ozlabs.ru>
On sPAPR, IOMMU page size varies and if QEMU is running with RAM
backed with hugepages, we can advertise this to the guest so does
this patch.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
---
hw/ppc/spapr_pci.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index fd6fc1d953..09244056fc 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -1505,6 +1505,9 @@ static void spapr_phb_realize(DeviceState *dev, Error **errp)
}
/* DMA setup */
+ /* This allows huge pages for IOMMU when guest is backed with huge pages */
+ sphb->page_size_mask |= qemu_getrampagesize();
+
for (i = 0; i < windows_supported; ++i) {
tcet = spapr_tce_new_table(DEVICE(sphb), sphb->dma_liobn[i]);
if (!tcet) {
--
2.11.0
next prev parent reply other threads:[~2016-12-22 5:22 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-22 5:22 [Qemu-devel] [PATCH qemu 0/2] exec, spapr_pci: Advertise huge IOMMU pages Alexey Kardashevskiy
2016-12-22 5:22 ` [Qemu-devel] [PATCH qemu 1/2] exec, kvm, target-ppc: Move getrampagesize() to common code Alexey Kardashevskiy
2017-01-02 23:34 ` David Gibson
2017-02-09 5:43 ` Alexey Kardashevskiy
2017-02-09 11:48 ` Paolo Bonzini
2017-02-10 0:41 ` David Gibson
2017-02-28 8:12 ` Alexey Kardashevskiy
2017-03-01 1:06 ` David Gibson
2017-03-01 2:52 ` David Gibson
2016-12-22 5:22 ` Alexey Kardashevskiy [this message]
2017-01-02 23:41 ` [Qemu-devel] [PATCH qemu 2/2] spapr_pci: Advertise 16M IOMMU pages when available David Gibson
2017-01-09 2:06 ` Alexey Kardashevskiy
2017-01-12 5:09 ` David Gibson
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