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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v5 17/17] tools/tests: Enable xen-access on ARM
On ARM the guest memory doesn't start from 0 and has multiple banks
of memory, thus we adjust the setting/unsetting routines accordingly.
We also define the ARM specific test_and_set_bit function.
Signed-off-by: Tamas K Lengyel <tklengyel@xxxxxxxxxxxxx>
---
v5: - Use the new information returned by getdomaininfo, max_gpfn, to
set access permissions. On ARM this will include the potential
memory hole as well which the hypervisor just loops over.
v4: - Take into account multiple guest ram banks on ARM.
- Move HAS_MEM_ACCESS definition into config/*.mk and only compile
xen-access when it is defined.
- Pass CONFIG_X86/CONFIG_ARM flags during compilation in xen-access
Makefile.
---
config/arm32.mk | 1 +
config/arm64.mk | 1 +
config/x86_32.mk | 2 ++
config/x86_64.mk | 2 ++
tools/tests/xen-access/Makefile | 9 ++++--
tools/tests/xen-access/xen-access.c | 60 ++++++++++++++++++++++++++++---------
xen/arch/arm/Rules.mk | 1 -
xen/arch/x86/Rules.mk | 1 -
8 files changed, 59 insertions(+), 18 deletions(-)
diff --git a/config/arm32.mk b/config/arm32.mk
index aa79d22..4a7c259 100644
--- a/config/arm32.mk
+++ b/config/arm32.mk
@@ -13,6 +13,7 @@ HAS_PL011 := y
HAS_EXYNOS4210 := y
HAS_OMAP := y
HAS_NS16550 := y
+HAS_MEM_ACCESS := y
# Use only if calling $(LD) directly.
LDFLAGS_DIRECT += -EL
diff --git a/config/arm64.mk b/config/arm64.mk
index 15b57a4..ea6558d 100644
--- a/config/arm64.mk
+++ b/config/arm64.mk
@@ -8,6 +8,7 @@ CFLAGS += #-marm -march= -mcpu= etc
HAS_PL011 := y
HAS_NS16550 := y
+HAS_MEM_ACCESS := y
# Use only if calling $(LD) directly.
LDFLAGS_DIRECT += -EL
diff --git a/config/x86_32.mk b/config/x86_32.mk
index 7f76b25..5906e60 100644
--- a/config/x86_32.mk
+++ b/config/x86_32.mk
@@ -6,6 +6,8 @@ CONFIG_HVM := y
CONFIG_MIGRATE := y
CONFIG_XCUTILS := y
+HAS_MEM_ACCESS := y
+
CFLAGS += -m32 -march=i686
# Use only if calling $(LD) directly.
diff --git a/config/x86_64.mk b/config/x86_64.mk
index 11104bd..b000c4e 100644
--- a/config/x86_64.mk
+++ b/config/x86_64.mk
@@ -7,6 +7,8 @@ CONFIG_HVM := y
CONFIG_MIGRATE := y
CONFIG_XCUTILS := y
+HAS_MEM_ACCESS := y
+
CONFIG_XEN_INSTALL_SUFFIX := .gz
CFLAGS += -m64
diff --git a/tools/tests/xen-access/Makefile b/tools/tests/xen-access/Makefile
index 65eef99..5056972 100644
--- a/tools/tests/xen-access/Makefile
+++ b/tools/tests/xen-access/Makefile
@@ -7,8 +7,13 @@ CFLAGS += $(CFLAGS_libxenctrl)
CFLAGS += $(CFLAGS_libxenguest)
CFLAGS += $(CFLAGS_xeninclude)
-TARGETS-y :=
-TARGETS-$(CONFIG_X86) += xen-access
+CFLAGS-y :=
+CFLAGS-$(CONFIG_X86) := -DCONFIG_X86
+CFLAGS-$(CONFIG_ARM) := -DCONFIG_ARM
+CFLAGS += $(CFLAGS-y)
+
+TARGETS-y :=
+TARGETS-$(HAS_MEM_ACCESS) := xen-access
TARGETS := $(TARGETS-y)
.PHONY: all
diff --git a/tools/tests/xen-access/xen-access.c
b/tools/tests/xen-access/xen-access.c
index 6cb382d..9158636 100644
--- a/tools/tests/xen-access/xen-access.c
+++ b/tools/tests/xen-access/xen-access.c
@@ -41,22 +41,16 @@
#include <xenctrl.h>
#include <xen/mem_event.h>
-#define DPRINTF(a, b...) fprintf(stderr, a, ## b)
-#define ERROR(a, b...) fprintf(stderr, a "\n", ## b)
-#define PERROR(a, b...) fprintf(stderr, a ": %s\n", ## b, strerror(errno))
-
-/* Spinlock and mem event definitions */
-
-#define SPIN_LOCK_UNLOCKED 0
+#ifdef CONFIG_X86
+#define START_PFN 0ULL
#define ADDR (*(volatile long *) addr)
+
/**
* test_and_set_bit - Set a bit and return its old value
* @nr: Bit to set
* @addr: Address to count from
*
- * This operation is atomic and cannot be reordered.
- * It also implies a memory barrier.
*/
static inline int test_and_set_bit(int nr, volatile void *addr)
{
@@ -69,6 +63,43 @@ static inline int test_and_set_bit(int nr, volatile void
*addr)
return oldbit;
}
+#elif CONFIG_ARM
+
+#include <xen/arch-arm.h>
+
+#define PAGE_SHIFT 12
+#define START_PFN (GUEST_RAM0_BASE >> PAGE_SHIFT)
+#define BITS_PER_WORD 32
+#define BIT_MASK(nr) (1UL << ((nr) % BITS_PER_WORD))
+#define BIT_WORD(nr) ((nr) / BITS_PER_WORD)
+
+/**
+ * test_and_set_bit - Set a bit and return its old value
+ * @nr: Bit to set
+ * @addr: Address to count from
+ *
+ */
+static inline int test_and_set_bit(int nr, volatile void *addr)
+{
+ unsigned int mask = BIT_MASK(nr);
+ volatile unsigned int *p =
+ ((volatile unsigned int *)addr) + BIT_WORD(nr);
+ unsigned int old = *p;
+
+ *p = old | mask;
+ return (old & mask) != 0;
+}
+
+#endif
+
+#define DPRINTF(a, b...) fprintf(stderr, a, ## b)
+#define ERROR(a, b...) fprintf(stderr, a "\n", ## b)
+#define PERROR(a, b...) fprintf(stderr, a ": %s\n", ## b, strerror(errno))
+
+/* Spinlock and mem event definitions */
+
+#define SPIN_LOCK_UNLOCKED 0
+
typedef int spinlock_t;
static inline void spin_lock(spinlock_t *lock)
@@ -309,7 +340,7 @@ xenaccess_t *xenaccess_init(xc_interface **xch_r, domid_t
domain_id)
goto err;
}
- DPRINTF("max_pages = %"PRIx64"\n", xenaccess->domain_info->max_pages);
+ DPRINTF("max_gpfn = %"PRIx64"\n", xenaccess->domain_info->max_gpfn);
return xenaccess;
@@ -492,8 +523,9 @@ int main(int argc, char *argv[])
goto exit;
}
- rc = xc_set_mem_access(xch, domain_id, default_access, 0,
- xenaccess->domain_info->max_pages);
+ rc = xc_set_mem_access(xch, domain_id, default_access, START_PFN,
+ (xenaccess->domain_info->max_gpfn - START_PFN) );
+
if ( rc < 0 )
{
ERROR("Error %d setting all memory to access type %d\n", rc,
@@ -520,8 +552,8 @@ int main(int argc, char *argv[])
/* Unregister for every event */
rc = xc_set_mem_access(xch, domain_id, XENMEM_access_rwx, ~0ull,
0);
- rc = xc_set_mem_access(xch, domain_id, XENMEM_access_rwx, 0,
- xenaccess->domain_info->max_pages);
+ rc = xc_set_mem_access(xch, domain_id, XENMEM_access_rwx,
START_PFN,
+ (xenaccess->domain_info->max_gpfn -
START_PFN) );
rc = xc_hvm_param_set(xch, domain_id, HVM_PARAM_MEMORY_EVENT_INT3,
HVMPME_mode_disabled);
shutting_down = 1;
diff --git a/xen/arch/arm/Rules.mk b/xen/arch/arm/Rules.mk
index f6781b5..8658176 100644
--- a/xen/arch/arm/Rules.mk
+++ b/xen/arch/arm/Rules.mk
@@ -10,7 +10,6 @@ HAS_DEVICE_TREE := y
HAS_VIDEO := y
HAS_ARM_HDLCD := y
HAS_PASSTHROUGH := y
-HAS_MEM_ACCESS := y
CFLAGS += -I$(BASEDIR)/include
diff --git a/xen/arch/x86/Rules.mk b/xen/arch/x86/Rules.mk
index bd4e342..576985e 100644
--- a/xen/arch/x86/Rules.mk
+++ b/xen/arch/x86/Rules.mk
@@ -12,7 +12,6 @@ HAS_NS16550 := y
HAS_EHCI := y
HAS_KEXEC := y
HAS_GDBSX := y
-HAS_MEM_ACCESS := y
xenoprof := y
#
--
2.1.0
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