Olaf Hering
7adb207e17
- Update to v2.6.0-rc0: See http://wiki.qemu-project.org/ChangeLog/2.6 * Patch queue updated from git://github.com/openSUSE/qemu.git opensuse-2.6 * Accept every size in DISCARD request from a guest (bsc#964427) 0039-block-split-large-discard-requests-.patch * Recognize libxl flag to disable flush in block device (bsc#879425) 0040-xen_disk-Add-suse-specific-flush-di.patch * Use correct flag for crypto tests 0041-tests-Use-correct-config-param-for-.patch * Fix build on powerpc: 0042-build-link-with-libatomic-on-powerp.patch * Patches dropped (upstreamed): seabios_checkrom_typo.patch seabios_avoid_smbios_signature_string.patch OBS-URL: https://build.opensuse.org/request/show/383004 OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=289
46 lines
1.5 KiB
Diff
46 lines
1.5 KiB
Diff
From 31795a01d7db34560e09b67723f66c9b56e4bfe0 Mon Sep 17 00:00:00 2001
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From: Alexander Graf <agraf@suse.de>
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Date: Tue, 14 Apr 2009 16:24:15 +0200
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Subject: [PATCH] qemu-cvs-alsa_mmap
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Hack to prevent ALSA from using mmap() interface to simplify emulation.
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Signed-off-by: Alexander Graf <agraf@suse.de>
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Signed-off-by: Ulrich Hecht <uli@suse.de>
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---
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linux-user/mmap.c | 14 ++++++++++++++
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1 file changed, 14 insertions(+)
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diff --git a/linux-user/mmap.c b/linux-user/mmap.c
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index 3519147..671889b 100644
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--- a/linux-user/mmap.c
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+++ b/linux-user/mmap.c
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@@ -358,6 +358,9 @@ abi_ulong mmap_find_vma(abi_ulong start, abi_ulong size)
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}
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}
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+#define SNDRV_PCM_MMAP_OFFSET_STATUS 0x80000000
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+#define SNDRV_PCM_MMAP_OFFSET_CONTROL 0x81000000
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+
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/* NOTE: all the constants are the HOST ones */
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abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
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int flags, int fd, abi_ulong offset)
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@@ -392,6 +395,17 @@ abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
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}
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#endif
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+ /* Alsa tries to communcate with the kernel via mmap. This usually
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+ * is a good idea when user- and kernelspace are running on the
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+ * same architecture but does not work out when not. To make alsa
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+ * not to use mmap, we can just have it fail on the mmap calls that
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+ * would initiate this.
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+ */
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+ if(offset == SNDRV_PCM_MMAP_OFFSET_STATUS || offset == SNDRV_PCM_MMAP_OFFSET_CONTROL) {
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+ errno = EINVAL;
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+ return -1;
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+ }
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+
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if (offset & ~TARGET_PAGE_MASK) {
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errno = EINVAL;
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goto fail;
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