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xen
24970-x86-cpuidle-deny-port-access.patch
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File 24970-x86-cpuidle-deny-port-access.patch of Package xen
# HG changeset patch # User Jan Beulich <jbeulich@suse.com> # Date 1331048501 -3600 # Node ID 33980e36597b9f780ef515210863034b5e3080bf # Parent fb70e48ee3c2ea7060a97d9ddaa6dfc864f1efc0 x86/cpuidle: deny access to the I/O port used for EM_SYSIO Nothing, not even Dom0, should fiddle with this. Signed-off-by: Jan Beulich <jbeulich@suse.com> Acked-by: Keir Fraser <keir@xen.org> --- a/xen/arch/x86/acpi/cpu_idle.c +++ b/xen/arch/x86/acpi/cpu_idle.c @@ -44,6 +44,7 @@ #include <xen/sched-if.h> #include <asm/cache.h> #include <asm/io.h> +#include <asm/iocap.h> #include <asm/hpet.h> #include <asm/processor.h> #include <xen/pmstat.h> @@ -885,6 +886,9 @@ static void set_cx( cx->entry_method = ACPI_CSTATE_EM_HALT; break; case ACPI_ADR_SPACE_SYSTEM_IO: + if ( ioports_deny_access(dom0, cx->address, cx->address) ) + printk(XENLOG_WARNING "Could not deny access to port %04x\n", + cx->address); cx->entry_method = ACPI_CSTATE_EM_SYSIO; break; default:
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