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From: Julien Thierry <julien.thierry@arm.com>
To: kvmarm@lists.cs.columbia.edu
Cc: Andre.Przywara@arm.com, Sami.Mujawar@arm.com,
	will.deacon@arm.com, kvm@vger.kernel.org
Subject: [PATCH kvmtool 08/16] arm/pci: Do not use first PCI IO space bytes for devices
Date: Thu,  7 Mar 2019 08:36:09 +0000	[thread overview]
Message-ID: <1551947777-13044-9-git-send-email-julien.thierry@arm.com> (raw)
In-Reply-To: <1551947777-13044-1-git-send-email-julien.thierry@arm.com>

Linux has this convention that the lower 0x1000 bytes of the IO space
should not be used. (cf PCIBIOS_MIN_IO).

Just allocate those bytes to prevent future allocation assigning it to
devices.

Signed-off-by: Julien Thierry <julien.thierry@arm.com>
---
 arm/pci.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arm/pci.c b/arm/pci.c
index 83238ca..559e0cf 100644
--- a/arm/pci.c
+++ b/arm/pci.c
@@ -37,6 +37,9 @@ void pci__arm_init(struct kvm *kvm)
 
 	/* Make PCI port allocation start at a properly aligned address */
 	pci_get_io_space_block(align_pad);
+
+	/* Convention, don't allocate first 0x1000 bytes of PCI IO */
+	pci_get_io_space_block(0x1000);
 }
 
 void pci__generate_fdt_nodes(void *fdt)
-- 
1.9.1

  parent reply	other threads:[~2019-03-07  8:36 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-07  8:36 [PATCH kvmtool 00/16] Support PCI BAR configuration Julien Thierry
2019-03-07  8:36 ` [PATCH kvmtool 01/16] Makefile: Only compile vesa for archs that need it Julien Thierry
2019-04-04 13:43   ` Andre Przywara
2019-03-07  8:36 ` [PATCH kvmtool 02/16] brlock: Always pass argument to br_read_lock/unlock Julien Thierry
2019-04-04 13:43   ` Andre Przywara
2019-03-07  8:36 ` [PATCH kvmtool 03/16] brlock: fix build with KVM_BRLOCK_DEBUG Julien Thierry
2019-04-04 13:43   ` Andre Przywara
2019-03-07  8:36 ` [PATCH kvmtool 04/16] pci: Fix BAR resource sizing arbitration Julien Thierry
2019-04-04 13:44   ` Andre Przywara
2019-03-07  8:36 ` [PATCH kvmtool 05/16] ioport: pci: Move port allocations to PCI devices Julien Thierry
2019-04-04 13:45   ` Andre Przywara
2019-04-30  9:50     ` Julien Thierry
2019-04-30  9:50       ` Julien Thierry
2019-03-07  8:36 ` [PATCH kvmtool 06/16] pci: Fix ioport allocation size Julien Thierry
2019-04-04 13:46   ` Andre Przywara
2019-03-07  8:36 ` [PATCH kvmtool 07/16] arm/pci: Fix PCI IO region Julien Thierry
2019-03-07  8:36 ` Julien Thierry [this message]
2019-04-05 15:31   ` [PATCH kvmtool 08/16] arm/pci: Do not use first PCI IO space bytes for devices Andre Przywara
2019-06-14  8:32     ` Julien Thierry
2019-03-07  8:36 ` [PATCH kvmtool 09/16] brlock: Use rwlock instead of pause Julien Thierry
2019-03-07  8:36 ` [PATCH kvmtool 10/16] ref_cnt: Add simple ref counting API Julien Thierry
2019-03-07  8:36 ` [PATCH kvmtool 11/16] mmio: Allow mmio callbacks to be called without locking Julien Thierry
2019-03-07  8:36 ` [PATCH kvmtool 12/16] ioport: Allow ioport " Julien Thierry
2019-03-07  8:36 ` [PATCH kvmtool 13/16] vfio: Add support for BAR configuration Julien Thierry
2019-03-07  8:36 ` [PATCH kvmtool 14/16] virtio/pci: Make memory and IO BARs independent Julien Thierry
2019-03-07  8:36 ` [PATCH kvmtool 15/16] virtio/pci: update virtio mapping when PCI BARs are reconfigured Julien Thierry
2019-03-07  8:36 ` [PATCH kvmtool 16/16] arm/fdt: Remove PCI probe only property Julien Thierry
2019-04-26 14:09 ` [PATCH kvmtool 00/16] Support PCI BAR configuration Will Deacon
2019-04-26 14:09   ` Will Deacon

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