From: Keir Fraser <keir.fraser@citrix.com>
Date: Wed, 28 Oct 2009 10:55:53 +0000 (+0000)
Subject: x86: deny access to the ACPI PM timer I/O port range for Dom0
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~13165
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https:/%22bookmarks://%22/%22http:/www.example.com/cgi/%22https:/%22bookmarks:/%22?a=commitdiff_plain;h=9119667be235cc7dcb67b76e71640fec0f434555;p=xen.git

x86: deny access to the ACPI PM timer I/O port range for Dom0

Also move the declaration of pmtmr_ioport to a suitable header file.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
---

diff --git a/xen/arch/x86/acpi/boot.c b/xen/arch/x86/acpi/boot.c
index 121d1bae4c..e6cc2de6f2 100644
--- a/xen/arch/x86/acpi/boot.c
+++ b/xen/arch/x86/acpi/boot.c
@@ -332,10 +332,6 @@ static int __init acpi_parse_hpet(struct acpi_table_header *table)
 #define	acpi_parse_hpet	NULL
 #endif
 
-#ifdef CONFIG_X86_PM_TIMER
-extern u32 pmtmr_ioport;
-#endif
-
 #ifdef CONFIG_ACPI_SLEEP
 #define acpi_fadt_copy_address(dst, src, len) do {			\
 	if (fadt->header.revision >= FADT2_REVISION_ID)			\
diff --git a/xen/arch/x86/acpi/cpu_idle.c b/xen/arch/x86/acpi/cpu_idle.c
index 61f294f7bc..35c2723582 100644
--- a/xen/arch/x86/acpi/cpu_idle.c
+++ b/xen/arch/x86/acpi/cpu_idle.c
@@ -56,7 +56,6 @@ static void lapic_timer_nop(void) { }
 static void (*lapic_timer_off)(void);
 static void (*lapic_timer_on)(void);
 
-extern u32 pmtmr_ioport;
 extern void (*pm_idle) (void);
 extern void (*dead_idle) (void);
 extern void menu_get_trace_data(u32 *expected, u32 *pred);
diff --git a/xen/arch/x86/domain_build.c b/xen/arch/x86/domain_build.c
index 06a285f231..a740791e56 100644
--- a/xen/arch/x86/domain_build.c
+++ b/xen/arch/x86/domain_build.c
@@ -29,6 +29,7 @@
 #include <asm/paging.h>
 #include <asm/p2m.h>
 #include <asm/e820.h>
+#include <asm/acpi.h>
 #include <asm/bzimage.h> /* for bzimage_parse */
 
 #include <public/version.h>
@@ -1064,6 +1065,9 @@ int __init construct_dom0(
     rc |= ioports_deny_access(dom0, 0x40, 0x43);
     /* PIT Channel 2 / PC Speaker Control. */
     rc |= ioports_deny_access(dom0, 0x61, 0x61);
+    /* ACPI PM Timer. */
+    if ( pmtmr_ioport )
+        rc |= ioports_deny_access(dom0, pmtmr_ioport, pmtmr_ioport + 3);
     /* PCI configuration space (NB. 0xcf8 has special treatment). */
     rc |= ioports_deny_access(dom0, 0xcfc, 0xcff);
     /* Command-line I/O ranges. */
diff --git a/xen/arch/x86/time.c b/xen/arch/x86/time.c
index 06bf69f51d..982ce7ca52 100644
--- a/xen/arch/x86/time.c
+++ b/xen/arch/x86/time.c
@@ -30,6 +30,7 @@
 #include <asm/fixmap.h>
 #include <asm/mc146818rtc.h>
 #include <asm/div64.h>
+#include <asm/acpi.h>
 #include <asm/hpet.h>
 #include <io_ports.h>
 #include <asm/setup.h> /* for early_time_init */
diff --git a/xen/include/asm-x86/acpi.h b/xen/include/asm-x86/acpi.h
index b2bb9d9869..7666c2cfad 100644
--- a/xen/include/asm-x86/acpi.h
+++ b/xen/include/asm-x86/acpi.h
@@ -153,6 +153,8 @@ struct acpi_sleep_info {
 extern u8 x86_acpiid_to_apicid[];
 #define MAX_LOCAL_APIC 256
 
+extern u32 pmtmr_ioport;
+
 int acpi_dmar_init(void);
 void acpi_mmcfg_init(void);