Mailing List Archive

# HG changeset patch
# User kaf24@firebug.cl.cam.ac.uk
# Node ID 5d9f4e6c9519eb59467aceac665b0fe9fbbab190
# Parent 03382076472cb8bd9cd8e524abe7a49c85d2e70c
Blacklist memory-mapped APIC-register pages in the domain0
iomem capability list.

Signed-off-by: Keir Fraser <keir@xensource.com>

diff -r 03382076472c -r 5d9f4e6c9519 xen/arch/x86/domain_build.c
--- a/xen/arch/x86/domain_build.c Thu Feb 2 14:09:39 2006
+++ b/xen/arch/x86/domain_build.c Thu Feb 2 14:10:27 2006
@@ -755,28 +755,45 @@
printk("dom0: shadow setup done\n");
}

- i = 0;
+ rc = 0;

/* DOM0 is permitted full I/O capabilities. */
- i |= ioports_permit_access(dom0, 0, 0xFFFF);
- i |= iomem_permit_access(dom0, 0UL, ~0UL);
- i |= irqs_permit_access(dom0, 0, NR_PIRQS-1);
+ rc |= ioports_permit_access(dom0, 0, 0xFFFF);
+ rc |= iomem_permit_access(dom0, 0UL, ~0UL);
+ rc |= irqs_permit_access(dom0, 0, NR_PIRQS-1);

/*
* Modify I/O port access permissions.
*/
/* Master Interrupt Controller (PIC). */
- i |= ioports_deny_access(dom0, 0x20, 0x21);
+ rc |= ioports_deny_access(dom0, 0x20, 0x21);
/* Slave Interrupt Controller (PIC). */
- i |= ioports_deny_access(dom0, 0xA0, 0xA1);
+ rc |= ioports_deny_access(dom0, 0xA0, 0xA1);
/* Interval Timer (PIT). */
- i |= ioports_deny_access(dom0, 0x40, 0x43);
+ rc |= ioports_deny_access(dom0, 0x40, 0x43);
/* PIT Channel 2 / PC Speaker Control. */
- i |= ioports_deny_access(dom0, 0x61, 0x61);
+ rc |= ioports_deny_access(dom0, 0x61, 0x61);
/* Command-line I/O ranges. */
process_dom0_ioports_disable();

- BUG_ON(i != 0);
+ /*
+ * Modify I/O memory access permissions.
+ */
+ /* Local APIC. */
+ if ( mp_lapic_addr != 0 )
+ {
+ mfn = paddr_to_pfn(mp_lapic_addr);
+ rc |= iomem_deny_access(dom0, mfn, mfn);
+ }
+ /* I/O APICs. */
+ for ( i = 0; i < nr_ioapics; i++ )
+ {
+ mfn = paddr_to_pfn(mp_ioapics[i].mpc_apicaddr);
+ if ( smp_found_config )
+ rc |= iomem_deny_access(dom0, mfn, mfn);
+ }
+
+ BUG_ON(rc != 0);

return 0;
}

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