diff options
| author | Jan Beulich <jbeulich@suse.com> | 2013-09-12 11:25:34 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2013-09-12 11:25:34 +0200 |
| commit | 3f8a4aa9c19aa9f31fa62521b8fc6c5086d5c4e8 (patch) | |
| tree | 2f7f8df0ae8d2cde611b004a1b81c6d8172021e9 | |
| parent | 64afca0c191eb940eefa80c814b5b4d18d648d78 (diff) | |
| download | xen-3f8a4aa9c19aa9f31fa62521b8fc6c5086d5c4e8.tar.gz xen-3f8a4aa9c19aa9f31fa62521b8fc6c5086d5c4e8.tar.bz2 xen-3f8a4aa9c19aa9f31fa62521b8fc6c5086d5c4e8.zip | |
x86: don't allow Dom0 access to the MSI address range
In particular, MMIO assignments should not be done using this area.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by Xiantao Zhang <xiantao.zhang@intel.com>
master commit: 850188e1278cecd1dfb9b936024bee2d8dfdcc18
master date: 2013-08-27 11:11:38 +0200
| -rw-r--r-- | xen/arch/x86/domain_build.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/xen/arch/x86/domain_build.c b/xen/arch/x86/domain_build.c index 0dbec96b05..2a690fae24 100644 --- a/xen/arch/x86/domain_build.c +++ b/xen/arch/x86/domain_build.c @@ -1261,6 +1261,10 @@ int __init construct_dom0( if ( smp_found_config ) rc |= iomem_deny_access(dom0, mfn, mfn); } + /* MSI range. */ + rc |= iomem_deny_access(dom0, paddr_to_pfn(MSI_ADDR_BASE_LO), + paddr_to_pfn(MSI_ADDR_BASE_LO + + MSI_ADDR_DEST_ID_MASK)); /* Remove access to E820_UNUSABLE I/O regions above 1MB. */ for ( i = 0; i < e820.nr_map; i++ ) |