From: "Gerd Hoffmann" <kraxel@redhat.com>
To: devel@edk2.groups.io
Cc: Jordan Justen <jordan.l.justen@intel.com>,
Oliver Steffen <osteffen@redhat.com>,
Gerd Hoffmann <kraxel@redhat.com>,
Ard Biesheuvel <ardb+tianocore@kernel.org>,
Jiewen Yao <jiewen.yao@intel.com>
Subject: [PATCH v2 1/1] OvmfPkg/PciHotPlugInitDxe: fix io window size
Date: Mon, 26 Jun 2023 12:38:19 +0200 [thread overview]
Message-ID: <20230626103819.293209-1-kraxel@redhat.com> (raw)
Smallest IO window size for PCI bridges is 0x1000. Fix default size
accordingly. Avoids broken resource assignments like this:
[ ... ]
PciBus: Resource Map for Root Bridge PciRoot(0x0)
Type = Io16; Base = 0x6000; Length = 0x7000; Alignment = 0xFFF
[ ... ]
Base = 0xC000; Length = 0x200; Alignment = 0xFFF; Owner = PPB [00|02|00:**]
Base = 0xC200; Length = 0x40; Alignment = 0x3F; Owner = PCI [00|1F|03:20]
Base = 0xC240; Length = 0x20; Alignment = 0x1F; Owner = PCI [00|1F|02:20]
[ ... ]
... which the linux kernel fixes up later:
[ 0.644657] pci 0000:00:1f.3: BAR 4: assigned [io 0x1000-0x103f]
[ 0.646833] pci 0000:00:1f.2: BAR 4: assigned [io 0x1040-0x105f]
With the patch applied:
{ ... ]
PciBus: Resource Map for Root Bridge PciRoot(0x0)
Type = Io16; Base = 0x6000; Length = 0x8000; Alignment = 0xFFF
[ ... ]
Base = 0xC000; Length = 0x1000; Alignment = 0xFFF; Owner = PPB [00|02|00:**]
Base = 0xD000; Length = 0x40; Alignment = 0x3F; Owner = PCI [00|1F|03:20]
Base = 0xD040; Length = 0x20; Alignment = 0x1F; Owner = PCI [00|1F|02:20]
[ ... ]
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
OvmfPkg/PciHotPlugInitDxe/PciHotPlugInit.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/OvmfPkg/PciHotPlugInitDxe/PciHotPlugInit.c b/OvmfPkg/PciHotPlugInitDxe/PciHotPlugInit.c
index 69903a600981..bb2389d16c70 100644
--- a/OvmfPkg/PciHotPlugInitDxe/PciHotPlugInit.c
+++ b/OvmfPkg/PciHotPlugInitDxe/PciHotPlugInit.c
@@ -741,7 +741,7 @@ GetResourcePadding (
//
// Request defaults.
//
- SetIoPadding (--FirstResource, (UINTN)HighBitSetRoundUp64 (512));
+ SetIoPadding (--FirstResource, (UINTN)HighBitSetRoundUp64 (0x1000));
}
if (DefaultMmio) {
--
2.41.0
next reply other threads:[~2023-06-26 10:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-26 10:38 Gerd Hoffmann [this message]
2023-06-26 10:42 ` [PATCH v2 1/1] OvmfPkg/PciHotPlugInitDxe: fix io window size Ard Biesheuvel
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-list from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20230626103819.293209-1-kraxel@redhat.com \
--to=devel@edk2.groups.io \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox