This domctl will allow toolstack to read and write some
ACPI registers. It will be available to both x86 and ARM
but will be implemented first only for x86
Signed-off-by: Boris Ostrovsky <boris.ostrov...@oracle.com>
---
Changes in v4:
* New patch
xen/arch/x86/domctl.c | 9 +++++++++
xen/arch/x86/hvm/Makefile | 1 +
xen/arch/x86/hvm/acpi.c | 24 ++++++++++++++++++++++++
xen/include/asm-x86/hvm/domain.h | 3 +++
xen/include/public/domctl.h | 25 +++++++++++++++++++++++++
5 files changed, 62 insertions(+)
create mode 100644 xen/arch/x86/hvm/acpi.c
diff --git a/xen/arch/x86/domctl.c b/xen/arch/x86/domctl.c
index 2a2fe04..111bcbb 100644
--- a/xen/arch/x86/domctl.c
+++ b/xen/arch/x86/domctl.c
@@ -1430,6 +1430,15 @@ long arch_do_domctl(
}
break;
+ case XEN_DOMCTL_acpi_access:
+ if ( !is_hvm_domain(d) )
+ ret = -EINVAL;
+ else
+ ret = hvm_acpi_domctl_access(d, domctl->u.acpi_access.rw,
+ &domctl->u.acpi_access.gas,
+ domctl->u.acpi_access.val);
+ break;
+
default:
ret = iommu_do_domctl(domctl, d, u_domctl);
break;
diff --git a/xen/arch/x86/hvm/Makefile b/xen/arch/x86/hvm/Makefile
index f750d13..bae3244 100644
--- a/xen/arch/x86/hvm/Makefile
+++ b/xen/arch/x86/hvm/Makefile
@@ -1,6 +1,7 @@
subdir-y += svm
subdir-y += vmx
+obj-y += acpi.o
obj-y += asid.o
obj-y += emulate.o
obj-y += hpet.o
diff --git a/xen/arch/x86/hvm/acpi.c b/xen/arch/x86/hvm/acpi.c
new file mode 100644
index 0000000..7d42eaf
--- /dev/null
+++ b/xen/arch/x86/hvm/acpi.c
@@ -0,0 +1,24 @@
+/* acpi.c: ACPI access handling
+ *
+ * Copyright (c) 2016 Oracle and/or its affiliates. All rights reserved.
+ */
+#include <xen/errno.h>
+#include <xen/lib.h>
+#include <xen/sched.h>
+
+
+int hvm_acpi_domctl_access(struct domain *d, uint8_t rw, gas_t *gas,
+ XEN_GUEST_HANDLE_PARAM(uint8) arg)
+{
+ return -ENOSYS;
+}
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/xen/include/asm-x86/hvm/domain.h b/xen/include/asm-x86/hvm/domain.h
index d55b432..c5cd86c 100644
--- a/xen/include/asm-x86/hvm/domain.h
+++ b/xen/include/asm-x86/hvm/domain.h
@@ -158,6 +158,9 @@ struct hvm_domain {
#define hap_enabled(d) ((d)->arch.hvm_domain.hap_enabled)
+int hvm_acpi_domctl_access(struct domain *currd, uint8_t rw, gas_t *gas,
+ XEN_GUEST_HANDLE_PARAM(uint8) arg);
+
#endif /* __ASM_X86_HVM_DOMAIN_H__ */
/*
diff --git a/xen/include/public/domctl.h b/xen/include/public/domctl.h
index 177319d..26fe009 100644
--- a/xen/include/public/domctl.h
+++ b/xen/include/public/domctl.h
@@ -1144,6 +1144,29 @@ struct xen_domctl_psr_cat_op {
typedef struct xen_domctl_psr_cat_op xen_domctl_psr_cat_op_t;
DEFINE_XEN_GUEST_HANDLE(xen_domctl_psr_cat_op_t);
+/* ACPI Generic Address Structure */
+typedef struct gas {
+#define XEN_ACPI_SYSTEM_MEMORY 0
+#define XEN_ACPI_SYSTEM_IO 1
+ uint8_t space_id; /* Address space */
+ uint8_t bit_width; /* Size in bits of given register */
+ uint8_t bit_offset; /* Bit offset within the register */
+ uint8_t access_width; /* Minimum Access size (ACPI 3.0) */
+ uint64_t address; /* 64-bit address of register */
+} gas_t;
+
+struct xen_domctl_acpi_access {
+ gas_t gas; /* IN: Register being accessed */
+
+#define XEN_DOMCTL_ACPI_READ 0
+#define XEN_DOMCTL_ACPI_WRITE 1
+ uint8_t rw; /* IN: Read or write */
+
+ XEN_GUEST_HANDLE_64(uint8) val; /* IN/OUT: data */
+};
+typedef struct xen_domctl_acpi_access xen_domctl_acpi_access_t;
+DEFINE_XEN_GUEST_HANDLE(xen_domctl_acpi_access_t);
+
struct xen_domctl {
uint32_t cmd;
#define XEN_DOMCTL_createdomain 1
@@ -1221,6 +1244,7 @@ struct xen_domctl {
#define XEN_DOMCTL_monitor_op 77
#define XEN_DOMCTL_psr_cat_op 78
#define XEN_DOMCTL_soft_reset 79
+#define XEN_DOMCTL_acpi_access 80
#define XEN_DOMCTL_gdbsx_guestmemio 1000
#define XEN_DOMCTL_gdbsx_pausevcpu 1001
#define XEN_DOMCTL_gdbsx_unpausevcpu 1002
@@ -1283,6 +1307,7 @@ struct xen_domctl {
struct xen_domctl_psr_cmt_op psr_cmt_op;
struct xen_domctl_monitor_op monitor_op;
struct xen_domctl_psr_cat_op psr_cat_op;
+ struct xen_domctl_acpi_access acpi_access;
uint8_t pad[128];
} u;
};
--
2.7.4
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