From 238690a30d02d3f95f0355c88c35dc0e4232342a Mon Sep 17 00:00:00 2001
From: Corvin Köhne <corvink@FreeBSD.org>
Date: Mon, 20 Nov 2023 08:24:53 +0100
Subject: OvmfPkg/Bhyve: use a proper PCI IO range
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Bhyve uses an io port range of [ 0x2000, 0x10000 ] [1]. At the moment,
EDKII is using a subset of this range [ 0xC000, 0x10000 ] [2]. Even
though the EDKII range doesn't exceed the bhyve range, it's causing
issues on some guests like OpenBSD [3]. We don't know why it's causing
issues yet. However, using the same IO port range in EDKII fixes the
issue and is a good idea anyway.

[1] https://github.com/freebsd/freebsd-src/blob/82ea0132c8b17a7a6067c8a36c6434e587ede6de/usr.sbin/bhyve/pci_emul.c#L133-L134
[2] https://github.com/tianocore/edk2/blob/fb044b7fe893a4545995bfe2701fd38e593355d9/OvmfPkg/Bhyve/PlatformPei/Platform.c#L156-L157
[3] https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274389

Signed-off-by: Corvin Köhne <corvink@FreeBSD.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Rebecca Cran <rebecca@bsdio.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Jiewen Yao <jiewen.yao@intel.com>
---
 OvmfPkg/Bhyve/PlatformPei/Platform.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'OvmfPkg')

diff --git a/OvmfPkg/Bhyve/PlatformPei/Platform.c b/OvmfPkg/Bhyve/PlatformPei/Platform.c
index f6d9a9038e..bd1b22a947 100644
--- a/OvmfPkg/Bhyve/PlatformPei/Platform.c
+++ b/OvmfPkg/Bhyve/PlatformPei/Platform.c
@@ -153,8 +153,8 @@ MemMapInitialization (
   UINT64         PciIoSize;
   RETURN_STATUS  PcdStatus;
 
-  PciIoBase = 0xC000;
-  PciIoSize = 0x4000;
+  PciIoBase = 0x2000;
+  PciIoSize = 0xE000;
 
   //
   // Create Memory Type Information HOB
-- 
cgit