[Qemu-devel] [RFC PATCH V3 0/7] PSCI v0.2 support for KVM ARM/ARM64

[Qemu-devel] [RFC PATCH V3 0/7] PSCI v0.2 support for KVM ARM/ARM64

[Pranavkumar Sawargaonkar]

Recentely patches have been posted for in-kernel emulation of PSCI v0.2
http://www.spinics.net/lists/arm-kernel/msg305467.html
This patchset adds the QEMU side changes for providing PSCI v0.2 to VM.

ChangeLog:

V3: 
 - Rebase this patchset against v8 patchset for in-kernel PSCI v0.2 emulation
   (http://www.spinics.net/lists/kvm-arm/msg08780.html)
 - Added common kvm_arm_vcpu_init() function for kvm arm and kvm arm64

V2:
 - Rebase this patchset against v6 patchset for in-kernel PSCI v0.2 emulation
   (http://www.spinics.net/lists/arm-kernel/msg319037.html)
 - Handle KVM_EXIT_SYSTEM_EVENT in kvm-all.c:kvm_cpu_exec()
 - Drop change in kvm_arm_get_host_cpu_features()
 - Improve comments and description of kvm_arch_reset_vcpu() implementation

V1:
 - Initial RFC patchset

Pranavkumar Sawargaonkar (7):
  linux-headers: Update KVM headers from v3.15
  kvm: Handle exit reason KVM_EXIT_SYSTEM_EVENT
  target-arm: Enable KVM_ARM_VCPU_PSCI_0_2 feature when possible
  target-arm: Provide PSCI v0.2 constants to generic QEMU code
  hw/arm/virt: Use PSCI v0.2 function IDs when kernel supports it
  target-arm: Common kvm_arm_vcpu_init() for KVM ARM and KVM ARM64
  target-arm: Implement kvm_arch_reset_vcpu() for KVM ARM64

 hw/arm/virt.c                 |   28 ++++++++++++---
 kvm-all.c                     |   16 +++++++++
 linux-headers/asm-arm/kvm.h   |   19 +++++-----
 linux-headers/asm-arm64/kvm.h |   21 +++++------
 linux-headers/linux/kvm.h     |   10 ++++++
 linux-headers/linux/psci.h    |   77 +++++++++++++++++++++++++++++++++++++++++
 target-arm/kvm-consts.h       |   63 +++++++++++++++++++++++++++------
 target-arm/kvm.c              |   23 ++++++++++++
 target-arm/kvm32.c            |   15 ++------
 target-arm/kvm64.c            |   23 ++++++------
 target-arm/kvm_arm.h          |   14 ++++++++
 11 files changed, 251 insertions(+), 58 deletions(-)
 create mode 100644 linux-headers/linux/psci.h

-- 
1.7.9.5

[Qemu-devel] [RFC PATCH V3 1/7] linux-headers: Update KVM headers from v3.15

[Pranavkumar Sawargaonkar]

Syncup KVM related linux headers from v3.15.

Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
Signed-off-by: Anup Patel <anup.patel@linaro.org>
---
 linux-headers/asm-arm/kvm.h   |   19 +++++-----
 linux-headers/asm-arm64/kvm.h |   21 +++++------
 linux-headers/linux/kvm.h     |   10 ++++++
 linux-headers/linux/psci.h    |   77 +++++++++++++++++++++++++++++++++++++++++
 4 files changed, 108 insertions(+), 19 deletions(-)
 create mode 100644 linux-headers/linux/psci.h

diff --git a/linux-headers/asm-arm/kvm.h b/linux-headers/asm-arm/kvm.h
index ef0c878..6574ddf 100644
--- a/linux-headers/asm-arm/kvm.h
+++ b/linux-headers/asm-arm/kvm.h
@@ -20,6 +20,7 @@
 #define __ARM_KVM_H__
 
 #include <linux/types.h>
+#include <linux/psci.h>
 #include <asm/ptrace.h>
 
 #define __KVM_HAVE_GUEST_DEBUG
@@ -83,6 +84,7 @@ struct kvm_regs {
 #define KVM_VGIC_V2_CPU_SIZE		0x2000
 
 #define KVM_ARM_VCPU_POWER_OFF		0 /* CPU is started in OFF state */
+#define KVM_ARM_VCPU_PSCI_0_2		1 /* CPU uses PSCI v0.2 */
 
 struct kvm_vcpu_init {
 	__u32 target;
@@ -194,16 +196,15 @@ struct kvm_arch_memory_slot {
 
 /* PSCI interface */
 #define KVM_PSCI_FN_BASE		0x95c1ba5e
-#define KVM_PSCI_FN(n)			(KVM_PSCI_FN_BASE + (n))
 
-#define KVM_PSCI_FN_CPU_SUSPEND		KVM_PSCI_FN(0)
-#define KVM_PSCI_FN_CPU_OFF		KVM_PSCI_FN(1)
-#define KVM_PSCI_FN_CPU_ON		KVM_PSCI_FN(2)
-#define KVM_PSCI_FN_MIGRATE		KVM_PSCI_FN(3)
+#define KVM_PSCI_FN_CPU_SUSPEND		PSCI_FN(KVM_PSCI_FN_BASE, 0)
+#define KVM_PSCI_FN_CPU_OFF		PSCI_FN(KVM_PSCI_FN_BASE, 1)
+#define KVM_PSCI_FN_CPU_ON		PSCI_FN(KVM_PSCI_FN_BASE, 2)
+#define KVM_PSCI_FN_MIGRATE		PSCI_FN(KVM_PSCI_FN_BASE, 3)
 
-#define KVM_PSCI_RET_SUCCESS		0
-#define KVM_PSCI_RET_NI			((unsigned long)-1)
-#define KVM_PSCI_RET_INVAL		((unsigned long)-2)
-#define KVM_PSCI_RET_DENIED		((unsigned long)-3)
+#define KVM_PSCI_RET_SUCCESS		PSCI_RET_SUCCESS
+#define KVM_PSCI_RET_NI			PSCI_RET_NOT_SUPPORTED
+#define KVM_PSCI_RET_INVAL		PSCI_RET_INVALID_PARAMS
+#define KVM_PSCI_RET_DENIED		PSCI_RET_DENIED
 
 #endif /* __ARM_KVM_H__ */
diff --git a/linux-headers/asm-arm64/kvm.h b/linux-headers/asm-arm64/kvm.h
index eaf54a3..9b67161 100644
--- a/linux-headers/asm-arm64/kvm.h
+++ b/linux-headers/asm-arm64/kvm.h
@@ -31,6 +31,7 @@
 #define KVM_NR_SPSR	5
 
 #ifndef __ASSEMBLY__
+#include <linux/psci.h>
 #include <asm/types.h>
 #include <asm/ptrace.h>
 
@@ -77,6 +78,7 @@ struct kvm_regs {
 
 #define KVM_ARM_VCPU_POWER_OFF		0 /* CPU is started in OFF state */
 #define KVM_ARM_VCPU_EL1_32BIT		1 /* CPU running a 32bit VM */
+#define KVM_ARM_VCPU_PSCI_0_2		2 /* CPU uses PSCI v0.2 */
 
 struct kvm_vcpu_init {
 	__u32 target;
@@ -177,19 +179,18 @@ struct kvm_arch_memory_slot {
 /* Highest supported SPI, from VGIC_NR_IRQS */
 #define KVM_ARM_IRQ_GIC_MAX		127
 
-/* PSCI interface */
+/* PSCI v0.1 interface */
 #define KVM_PSCI_FN_BASE		0x95c1ba5e
-#define KVM_PSCI_FN(n)			(KVM_PSCI_FN_BASE + (n))
 
-#define KVM_PSCI_FN_CPU_SUSPEND		KVM_PSCI_FN(0)
-#define KVM_PSCI_FN_CPU_OFF		KVM_PSCI_FN(1)
-#define KVM_PSCI_FN_CPU_ON		KVM_PSCI_FN(2)
-#define KVM_PSCI_FN_MIGRATE		KVM_PSCI_FN(3)
+#define KVM_PSCI_FN_CPU_SUSPEND		PSCI_FN(KVM_PSCI_FN_BASE, 0)
+#define KVM_PSCI_FN_CPU_OFF		PSCI_FN(KVM_PSCI_FN_BASE, 1)
+#define KVM_PSCI_FN_CPU_ON		PSCI_FN(KVM_PSCI_FN_BASE, 2)
+#define KVM_PSCI_FN_MIGRATE		PSCI_FN(KVM_PSCI_FN_BASE, 3)
 
-#define KVM_PSCI_RET_SUCCESS		0
-#define KVM_PSCI_RET_NI			((unsigned long)-1)
-#define KVM_PSCI_RET_INVAL		((unsigned long)-2)
-#define KVM_PSCI_RET_DENIED		((unsigned long)-3)
+#define KVM_PSCI_RET_SUCCESS		PSCI_RET_SUCCESS
+#define KVM_PSCI_RET_NI			PSCI_RET_NOT_SUPPORTED
+#define KVM_PSCI_RET_INVAL		PSCI_RET_INVALID_PARAMS
+#define KVM_PSCI_RET_DENIED		PSCI_RET_DENIED
 
 #endif
 
diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index e27a4b3..fa4a2f7 100644
--- a/linux-headers/linux/kvm.h
+++ b/linux-headers/linux/kvm.h
@@ -171,6 +171,7 @@ struct kvm_pit_config {
 #define KVM_EXIT_WATCHDOG         21
 #define KVM_EXIT_S390_TSCH        22
 #define KVM_EXIT_EPR              23
+#define KVM_EXIT_SYSTEM_EVENT     24
 
 /* For KVM_EXIT_INTERNAL_ERROR */
 /* Emulate instruction failed. */
@@ -301,6 +302,13 @@ struct kvm_run {
 		struct {
 			__u32 epr;
 		} epr;
+		/* KVM_EXIT_SYSTEM_EVENT */
+		struct {
+#define KVM_SYSTEM_EVENT_SHUTDOWN       1
+#define KVM_SYSTEM_EVENT_RESET          2
+			__u32 type;
+			__u64 flags;
+		} system_event;
 		/* Fix the size of the union. */
 		char padding[256];
 	};
@@ -740,6 +748,8 @@ struct kvm_ppc_smmu_info {
 #define KVM_CAP_SPAPR_MULTITCE 94
 #define KVM_CAP_EXT_EMUL_CPUID 95
 #define KVM_CAP_HYPERV_TIME 96
+#define KVM_CAP_IOAPIC_POLARITY_IGNORED 97
+#define KVM_CAP_ARM_PSCI_0_2 98
 
 #ifdef KVM_CAP_IRQ_ROUTING
 
diff --git a/linux-headers/linux/psci.h b/linux-headers/linux/psci.h
new file mode 100644
index 0000000..d1ab69e
--- /dev/null
+++ b/linux-headers/linux/psci.h
@@ -0,0 +1,77 @@
+/*
+ * ARM Power State and Coordination Interface (PSCI) header
+ *
+ * This header holds common PSCI defines and macros shared
+ * by: ARM kernel, ARM64 kernel, KVM ARM/ARM64 and user space.
+ *
+ * Copyright (C) 2014 Linaro Ltd.
+ * Author: Anup Patel <anup.patel@linaro.org>
+ */
+
+#ifndef _UAPI_LINUX_PSCI_H
+#define _UAPI_LINUX_PSCI_H
+
+/* PSCI v0.1 interface */
+#define PSCI_FN(base, n)			((base) + (n))
+
+#define PSCI_FN_CPU_SUSPEND(base)		PSCI_FN(base, 0)
+#define PSCI_FN_CPU_OFF(base)			PSCI_FN(base, 1)
+#define PSCI_FN_CPU_ON(base)			PSCI_FN(base, 2)
+#define PSCI_FN_MIGRATE(base)			PSCI_FN(base, 3)
+
+/* PSCI v0.2 interface */
+#define PSCI_0_2_FN_BASE			0x84000000
+#define PSCI_0_2_FN(n)				(PSCI_0_2_FN_BASE + (n))
+#define PSCI_0_2_64BIT				0x40000000
+#define PSCI_0_2_FN64_BASE			\
+					(PSCI_0_2_FN_BASE + PSCI_0_2_64BIT)
+#define PSCI_0_2_FN64(n)			(PSCI_0_2_FN64_BASE + (n))
+
+#define PSCI_0_2_FN_PSCI_VERSION		PSCI_0_2_FN(0)
+#define PSCI_0_2_FN_CPU_SUSPEND			PSCI_0_2_FN(1)
+#define PSCI_0_2_FN_CPU_OFF			PSCI_0_2_FN(2)
+#define PSCI_0_2_FN_CPU_ON			PSCI_0_2_FN(3)
+#define PSCI_0_2_FN_AFFINITY_INFO		PSCI_0_2_FN(4)
+#define PSCI_0_2_FN_MIGRATE			PSCI_0_2_FN(5)
+#define PSCI_0_2_FN_MIGRATE_INFO_TYPE		PSCI_0_2_FN(6)
+#define PSCI_0_2_FN_MIGRATE_INFO_UP_CPU		PSCI_0_2_FN(7)
+#define PSCI_0_2_FN_SYSTEM_OFF			PSCI_0_2_FN(8)
+#define PSCI_0_2_FN_SYSTEM_RESET		PSCI_0_2_FN(9)
+
+#define PSCI_0_2_FN64_CPU_SUSPEND		PSCI_0_2_FN64(1)
+#define PSCI_0_2_FN64_CPU_ON			PSCI_0_2_FN64(3)
+#define PSCI_0_2_FN64_AFFINITY_INFO		PSCI_0_2_FN64(4)
+#define PSCI_0_2_FN64_MIGRATE			PSCI_0_2_FN64(5)
+#define PSCI_0_2_FN64_MIGRATE_INFO_UP_CPU	PSCI_0_2_FN64(7)
+
+#define PSCI_0_2_POWER_STATE_ID_MASK		0xffff
+#define PSCI_0_2_POWER_STATE_ID_SHIFT		0
+#define PSCI_0_2_POWER_STATE_TYPE_MASK		0x1
+#define PSCI_0_2_POWER_STATE_TYPE_SHIFT		16
+#define PSCI_0_2_POWER_STATE_AFFL_MASK		0x3
+#define PSCI_0_2_POWER_STATE_AFFL_SHIFT		24
+
+#define PSCI_0_2_TOS_UP_MIGRATE			0
+#define PSCI_0_2_TOS_UP_NO_MIGRATE		1
+#define PSCI_0_2_TOS_MP				2
+
+/* PSCI version decoding (independent of PSCI version) */
+#define PSCI_VERSION_MAJOR_MASK			0xffff0000
+#define PSCI_VERSION_MINOR_MASK			0x0000ffff
+#define PSCI_VERSION_MAJOR_SHIFT		16
+#define PSCI_VERSION_MAJOR(ver)			\
+		(((ver) & PSCI_VER_MAJOR_MASK) >> PSCI_VER_MAJOR_SHIFT)
+#define PSCI_VERSION_MINOR(ver)			((ver) & PSCI_VER_MINOR_MASK)
+
+/* PSCI return values (inclusive of all PSCI versions) */
+#define PSCI_RET_SUCCESS			0
+#define PSCI_RET_NOT_SUPPORTED			-1
+#define PSCI_RET_INVALID_PARAMS			-2
+#define PSCI_RET_DENIED				-3
+#define PSCI_RET_ALREADY_ON			-4
+#define PSCI_RET_ON_PENDING			-5
+#define PSCI_RET_INTERNAL_FAILURE		-6
+#define PSCI_RET_NOT_PRESENT			-7
+#define PSCI_RET_DISABLED			-8
+
+#endif /* _UAPI_LINUX_PSCI_H */
-- 
1.7.9.5

[Qemu-devel] [RFC PATCH V3 2/7] kvm: Handle exit reason KVM_EXIT_SYSTEM_EVENT

[Pranavkumar Sawargaonkar]

In-kernel PSCI v0.2 emulation of KVM ARM/ARM64 forwards SYSTEM_OFF
and SYSTEM_RESET function calls to QEMU using KVM_EXIT_SYSTEM_EVENT
exit reason.

This patch updates kvm_cpu_exec() to handle KVM_SYSTEM_EVENT_SHUTDOWN
and KVM_SYSTEM_EVENT_RESET system-level events from QEMU-side.

Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
Signed-off-by: Anup Patel <anup.patel@linaro.org>
---
 kvm-all.c |   16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/kvm-all.c b/kvm-all.c
index cd4111d..53edbc9 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1724,6 +1724,22 @@ int kvm_cpu_exec(CPUState *cpu)
         case KVM_EXIT_INTERNAL_ERROR:
             ret = kvm_handle_internal_error(cpu, run);
             break;
+        case KVM_EXIT_SYSTEM_EVENT:
+            switch (run->system_event.type) {
+            case KVM_SYSTEM_EVENT_SHUTDOWN:
+                qemu_system_shutdown_request();
+                ret = EXCP_INTERRUPT;
+                break;
+            case KVM_SYSTEM_EVENT_RESET:
+                qemu_system_reset_request();
+                ret = EXCP_INTERRUPT;
+                break;
+            default:
+                DPRINTF("kvm_arch_handle_exit\n");
+                ret = kvm_arch_handle_exit(cpu, run);
+                break;
+            }
+            break;
         default:
             DPRINTF("kvm_arch_handle_exit\n");
             ret = kvm_arch_handle_exit(cpu, run);
-- 
1.7.9.5

[Qemu-devel] [RFC PATCH V3 3/7] target-arm: Enable KVM_ARM_VCPU_PSCI_0_2 feature when possible

[Pranavkumar Sawargaonkar]

Latest linux kernel supports in-kernel emulation of PSCI v0.2 but
to enable it we need to select KVM_ARM_VCPU_PSCI_0_2 feature using
KVM_ARM_VCPU_INIT ioctl.

Also, we can use KVM_ARM_VCPU_PSCI_0_2 feature for VCPU only when
linux kernel has KVM_CAP_ARM_PSCI_0_2 capability.

This patch updates kvm_arch_init_vcpu() to enable KVM_ARM_VCPU_PSCI_0_2
feature for VCPU when KVM ARM/ARM64 has KVM_CAP_ARM_PSCI_0_2 capability.

Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
Signed-off-by: Anup Patel <anup.patel@linaro.org>
---
 target-arm/kvm32.c |    5 ++++-
 target-arm/kvm64.c |    5 ++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/target-arm/kvm32.c b/target-arm/kvm32.c
index a4fde07..afeff01 100644
--- a/target-arm/kvm32.c
+++ b/target-arm/kvm32.c
@@ -181,7 +181,10 @@ int kvm_arch_init_vcpu(CPUState *cs)
     init.target = cpu->kvm_target;
     memset(init.features, 0, sizeof(init.features));
     if (cpu->start_powered_off) {
-        init.features[0] = 1 << KVM_ARM_VCPU_POWER_OFF;
+        init.features[0] |= 1 << KVM_ARM_VCPU_POWER_OFF;
+    }
+    if (kvm_check_extension(cs->kvm_state, KVM_CAP_ARM_PSCI_0_2)) {
+        init.features[0] |= 1 << KVM_ARM_VCPU_PSCI_0_2;
     }
     ret = kvm_vcpu_ioctl(cs, KVM_ARM_VCPU_INIT, &init);
     if (ret) {
diff --git a/target-arm/kvm64.c b/target-arm/kvm64.c
index 1b7ca90..02bba45 100644
--- a/target-arm/kvm64.c
+++ b/target-arm/kvm64.c
@@ -90,7 +90,10 @@ int kvm_arch_init_vcpu(CPUState *cs)
     init.target = cpu->kvm_target;
     memset(init.features, 0, sizeof(init.features));
     if (cpu->start_powered_off) {
-        init.features[0] = 1 << KVM_ARM_VCPU_POWER_OFF;
+        init.features[0] |= 1 << KVM_ARM_VCPU_POWER_OFF;
+    }
+    if (kvm_check_extension(cs->kvm_state, KVM_CAP_ARM_PSCI_0_2)) {
+        init.features[0] |= 1 << KVM_ARM_VCPU_PSCI_0_2;
     }
     ret = kvm_vcpu_ioctl(cs, KVM_ARM_VCPU_INIT, &init);
 
-- 
1.7.9.5

[Qemu-devel] [RFC PATCH V3 4/7] target-arm: Provide PSCI v0.2 constants to generic QEMU code

[Pranavkumar Sawargaonkar]

Provide QEMU PSCI v0.2 constants for non-KVM code; this will
allow us to avoid an #ifdef in boards which set up a PSCI v0.2
node in the device tree.

Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
Signed-off-by: Anup Patel <anup.patel@linaro.org>
---
 target-arm/kvm-consts.h |   63 ++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 52 insertions(+), 11 deletions(-)

diff --git a/target-arm/kvm-consts.h b/target-arm/kvm-consts.h
index 6009a33..5cf93ab 100644
--- a/target-arm/kvm-consts.h
+++ b/target-arm/kvm-consts.h
@@ -38,17 +38,58 @@ MISMATCH_CHECK(CP_REG_SIZE_U64, KVM_REG_SIZE_U64)
 MISMATCH_CHECK(CP_REG_ARM, KVM_REG_ARM)
 MISMATCH_CHECK(CP_REG_ARCH_MASK, KVM_REG_ARCH_MASK)
 
-#define PSCI_FN_BASE 0x95c1ba5e
-#define PSCI_FN(n) (PSCI_FN_BASE + (n))
-#define PSCI_FN_CPU_SUSPEND PSCI_FN(0)
-#define PSCI_FN_CPU_OFF PSCI_FN(1)
-#define PSCI_FN_CPU_ON PSCI_FN(2)
-#define PSCI_FN_MIGRATE PSCI_FN(3)
-
-MISMATCH_CHECK(PSCI_FN_CPU_SUSPEND, KVM_PSCI_FN_CPU_SUSPEND)
-MISMATCH_CHECK(PSCI_FN_CPU_OFF, KVM_PSCI_FN_CPU_OFF)
-MISMATCH_CHECK(PSCI_FN_CPU_ON, KVM_PSCI_FN_CPU_ON)
-MISMATCH_CHECK(PSCI_FN_MIGRATE, KVM_PSCI_FN_MIGRATE)
+/* PSCI v0.1 interface */
+#define QEMU_PSCI_FN_BASE 0x95c1ba5e
+#define QEMU_PSCI_FN(n) (QEMU_PSCI_FN_BASE + (n))
+#define QEMU_PSCI_FN_CPU_SUSPEND QEMU_PSCI_FN(0)
+#define QEMU_PSCI_FN_CPU_OFF QEMU_PSCI_FN(1)
+#define QEMU_PSCI_FN_CPU_ON QEMU_PSCI_FN(2)
+#define QEMU_PSCI_FN_MIGRATE QEMU_PSCI_FN(3)
+
+MISMATCH_CHECK(QEMU_PSCI_FN_CPU_SUSPEND, KVM_PSCI_FN_CPU_SUSPEND)
+MISMATCH_CHECK(QEMU_PSCI_FN_CPU_OFF, KVM_PSCI_FN_CPU_OFF)
+MISMATCH_CHECK(QEMU_PSCI_FN_CPU_ON, KVM_PSCI_FN_CPU_ON)
+MISMATCH_CHECK(QEMU_PSCI_FN_MIGRATE, KVM_PSCI_FN_MIGRATE)
+
+/* PSCI v0.2 interface */
+#define QEMU_PSCI_0_2_FN_BASE 0x84000000
+#define QEMU_PSCI_0_2_FN(n) (QEMU_PSCI_0_2_FN_BASE + (n))
+#define QEMU_PSCI_0_2_FN64_BASE 0xC4000000
+#define QEMU_PSCI_0_2_FN64(n) (QEMU_PSCI_0_2_FN64_BASE + (n))
+#define QEMU_PSCI_0_2_FN_PSCI_VERSION QEMU_PSCI_0_2_FN(0)
+#define QEMU_PSCI_0_2_FN_CPU_SUSPEND QEMU_PSCI_0_2_FN(1)
+#define QEMU_PSCI_0_2_FN_CPU_OFF QEMU_PSCI_0_2_FN(2)
+#define QEMU_PSCI_0_2_FN_CPU_ON QEMU_PSCI_0_2_FN(3)
+#define QEMU_PSCI_0_2_FN_AFFINITY_INFO QEMU_PSCI_0_2_FN(4)
+#define QEMU_PSCI_0_2_FN_MIGRATE QEMU_PSCI_0_2_FN(5)
+#define QEMU_PSCI_0_2_FN_MIGRATE_INFO_TYPE QEMU_PSCI_0_2_FN(6)
+#define QEMU_PSCI_0_2_FN_MIGRATE_INFO_UP_CPU QEMU_PSCI_0_2_FN(7)
+#define QEMU_PSCI_0_2_FN_SYSTEM_OFF QEMU_PSCI_0_2_FN(8)
+#define QEMU_PSCI_0_2_FN_SYSTEM_RESET QEMU_PSCI_0_2_FN(9)
+#define QEMU_PSCI_0_2_FN64_CPU_SUSPEND QEMU_PSCI_0_2_FN64(1)
+#define QEMU_PSCI_0_2_FN64_CPU_ON QEMU_PSCI_0_2_FN64(3)
+#define QEMU_PSCI_0_2_FN64_AFFINITY_INFO QEMU_PSCI_0_2_FN64(4)
+#define QEMU_PSCI_0_2_FN64_MIGRATE QEMU_PSCI_0_2_FN64(5)
+#define QEMU_PSCI_0_2_FN64_MIGRATE_INFO_UP_CPU QEMU_PSCI_0_2_FN64(7)
+
+MISMATCH_CHECK(QEMU_PSCI_0_2_FN_PSCI_VERSION, PSCI_0_2_FN_PSCI_VERSION)
+MISMATCH_CHECK(QEMU_PSCI_0_2_FN_CPU_SUSPEND, PSCI_0_2_FN_CPU_SUSPEND)
+MISMATCH_CHECK(QEMU_PSCI_0_2_FN_CPU_OFF, PSCI_0_2_FN_CPU_OFF)
+MISMATCH_CHECK(QEMU_PSCI_0_2_FN_CPU_ON, PSCI_0_2_FN_CPU_ON)
+MISMATCH_CHECK(QEMU_PSCI_0_2_FN_AFFINITY_INFO, PSCI_0_2_FN_AFFINITY_INFO)
+MISMATCH_CHECK(QEMU_PSCI_0_2_FN_MIGRATE, PSCI_0_2_FN_MIGRATE)
+MISMATCH_CHECK(QEMU_PSCI_0_2_FN_MIGRATE_INFO_TYPE, \
+               PSCI_0_2_FN_MIGRATE_INFO_TYPE)
+MISMATCH_CHECK(QEMU_PSCI_0_2_FN_MIGRATE_INFO_UP_CPU, \
+               PSCI_0_2_FN_MIGRATE_INFO_UP_CPU)
+MISMATCH_CHECK(QEMU_PSCI_0_2_FN_SYSTEM_OFF, PSCI_0_2_FN_SYSTEM_OFF)
+MISMATCH_CHECK(QEMU_PSCI_0_2_FN_SYSTEM_RESET, PSCI_0_2_FN_SYSTEM_RESET)
+MISMATCH_CHECK(QEMU_PSCI_0_2_FN64_CPU_SUSPEND, PSCI_0_2_FN64_CPU_SUSPEND)
+MISMATCH_CHECK(QEMU_PSCI_0_2_FN64_CPU_ON, PSCI_0_2_FN64_CPU_ON)
+MISMATCH_CHECK(QEMU_PSCI_0_2_FN64_AFFINITY_INFO, PSCI_0_2_FN64_AFFINITY_INFO)
+MISMATCH_CHECK(QEMU_PSCI_0_2_FN64_MIGRATE, PSCI_0_2_FN64_MIGRATE)
+MISMATCH_CHECK(QEMU_PSCI_0_2_FN64_MIGRATE_INFO_UP_CPU, \
+               PSCI_0_2_FN64_MIGRATE_INFO_UP_CPU)
 
 /* Note that KVM uses overlapping values for AArch32 and AArch64
  * target CPU numbers. AArch32 targets:
-- 
1.7.9.5

[Qemu-devel] [RFC PATCH V3 5/7] hw/arm/virt: Use PSCI v0.2 function IDs when kernel supports it

[Pranavkumar Sawargaonkar]

If we have in-kernel emulation of PSCI v0.2 for KVM ARM/ARM64 then
we enable PSCI v0.2 for each VCPU at the time of VCPU init hence we
need to provide PSCI v0.2 function IDs via generated DTB.

This patch updates generated DTB to have PSCI v0.2 function IDs when
we have in-kernel emulation PSCI v0.2 for KVM ARM/ARM64.

Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
Signed-off-by: Anup Patel <anup.patel@linaro.org>
---
 hw/arm/virt.c |   28 +++++++++++++++++++++++-----
 1 file changed, 23 insertions(+), 5 deletions(-)

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 2bbc931..cf6a774 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -187,11 +187,29 @@ static void create_fdt(VirtBoardInfo *vbi)
         qemu_fdt_add_subnode(fdt, "/psci");
         qemu_fdt_setprop_string(fdt, "/psci", "compatible", "arm,psci");
         qemu_fdt_setprop_string(fdt, "/psci", "method", "hvc");
-        qemu_fdt_setprop_cell(fdt, "/psci", "cpu_suspend",
-                                  PSCI_FN_CPU_SUSPEND);
-        qemu_fdt_setprop_cell(fdt, "/psci", "cpu_off", PSCI_FN_CPU_OFF);
-        qemu_fdt_setprop_cell(fdt, "/psci", "cpu_on", PSCI_FN_CPU_ON);
-        qemu_fdt_setprop_cell(fdt, "/psci", "migrate", PSCI_FN_MIGRATE);
+        if (kvm_check_extension(kvm_state, KVM_CAP_ARM_PSCI_0_2)) {
+            qemu_fdt_setprop_cell(fdt, "/psci", "cpu_suspend",
+                                      QEMU_PSCI_0_2_FN_CPU_SUSPEND);
+            qemu_fdt_setprop_cell(fdt, "/psci", "cpu_off",
+                                      QEMU_PSCI_0_2_FN_CPU_OFF);
+            qemu_fdt_setprop_cell(fdt, "/psci", "cpu_on",
+                                      QEMU_PSCI_0_2_FN_CPU_ON);
+            qemu_fdt_setprop_cell(fdt, "/psci", "migrate",
+                                      QEMU_PSCI_0_2_FN_MIGRATE);
+            qemu_fdt_setprop_cell(fdt, "/psci", "system_off",
+                                      QEMU_PSCI_0_2_FN_SYSTEM_OFF);
+            qemu_fdt_setprop_cell(fdt, "/psci", "system_reset",
+                                      QEMU_PSCI_0_2_FN_SYSTEM_RESET);
+        } else {
+            qemu_fdt_setprop_cell(fdt, "/psci", "cpu_suspend",
+                                      QEMU_PSCI_FN_CPU_SUSPEND);
+            qemu_fdt_setprop_cell(fdt, "/psci", "cpu_off",
+                                      QEMU_PSCI_FN_CPU_OFF);
+            qemu_fdt_setprop_cell(fdt, "/psci", "cpu_on",
+                                      QEMU_PSCI_FN_CPU_ON);
+            qemu_fdt_setprop_cell(fdt, "/psci", "migrate",
+                                      QEMU_PSCI_FN_MIGRATE);
+        }
     }
 }
 
-- 
1.7.9.5

[Qemu-devel] [RFC PATCH V3 6/7] target-arm: Common kvm_arm_vcpu_init() for KVM ARM and KVM ARM64

[Pranavkumar Sawargaonkar]

Introduce a common kvm_arm_vcpu_init() for doing KVM_ARM_VCPU_INIT
ioctl in KVM ARM and KVM ARM64. This also helps us factor-out few
common code lines from kvm_arch_init_vcpu() for KVM ARM/ARM64.

Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
Signed-off-by: Anup Patel <anup.patel@linaro.org>
---
 target-arm/kvm.c     |   23 +++++++++++++++++++++++
 target-arm/kvm32.c   |   18 +++---------------
 target-arm/kvm64.c   |   22 ++++++++--------------
 target-arm/kvm_arm.h |   14 ++++++++++++++
 4 files changed, 48 insertions(+), 29 deletions(-)

diff --git a/target-arm/kvm.c b/target-arm/kvm.c
index 39202d7..55bc3a3 100644
--- a/target-arm/kvm.c
+++ b/target-arm/kvm.c
@@ -27,6 +27,29 @@ const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
     KVM_CAP_LAST_INFO
 };
 
+int kvm_arm_vcpu_init(CPUState *cs, uint32_t feature0_extra)
+{
+    ARMCPU *cpu = ARM_CPU(cs);
+    struct kvm_vcpu_init init;
+
+    if (cpu->kvm_target == QEMU_KVM_ARM_TARGET_NONE) {
+        fprintf(stderr, "KVM is not supported for this guest CPU type\n");
+        return -EINVAL;
+    }
+
+    init.target = cpu->kvm_target;
+    memset(init.features, 0, sizeof(init.features));
+    if (cpu->start_powered_off) {
+        init.features[0] |= 1 << KVM_ARM_VCPU_POWER_OFF;
+    }
+    if (kvm_check_extension(cs->kvm_state, KVM_CAP_ARM_PSCI_0_2)) {
+        init.features[0] |= 1 << KVM_ARM_VCPU_PSCI_0_2;
+    }
+    init.features[0] |= feature0_extra;
+
+    return kvm_vcpu_ioctl(cs, KVM_ARM_VCPU_INIT, &init);
+}
+
 bool kvm_arm_create_scratch_host_vcpu(const uint32_t *cpus_to_try,
                                       int *fdarray,
                                       struct kvm_vcpu_init *init)
diff --git a/target-arm/kvm32.c b/target-arm/kvm32.c
index afeff01..aa9facc 100644
--- a/target-arm/kvm32.c
+++ b/target-arm/kvm32.c
@@ -165,7 +165,6 @@ static int compare_u64(const void *a, const void *b)
 
 int kvm_arch_init_vcpu(CPUState *cs)
 {
-    struct kvm_vcpu_init init;
     int i, ret, arraylen;
     uint64_t v;
     struct kvm_one_reg r;
@@ -173,23 +172,12 @@ int kvm_arch_init_vcpu(CPUState *cs)
     struct kvm_reg_list *rlp;
     ARMCPU *cpu = ARM_CPU(cs);
 
-    if (cpu->kvm_target == QEMU_KVM_ARM_TARGET_NONE) {
-        fprintf(stderr, "KVM is not supported for this guest CPU type\n");
-        return -EINVAL;
-    }
-
-    init.target = cpu->kvm_target;
-    memset(init.features, 0, sizeof(init.features));
-    if (cpu->start_powered_off) {
-        init.features[0] |= 1 << KVM_ARM_VCPU_POWER_OFF;
-    }
-    if (kvm_check_extension(cs->kvm_state, KVM_CAP_ARM_PSCI_0_2)) {
-        init.features[0] |= 1 << KVM_ARM_VCPU_PSCI_0_2;
-    }
-    ret = kvm_vcpu_ioctl(cs, KVM_ARM_VCPU_INIT, &init);
+    /* Do KVM_ARM_VCPU_INIT ioctl */
+    ret = kvm_arm_vcpu_init(cs, 0x0);
     if (ret) {
         return ret;
     }
+
     /* Query the kernel to make sure it supports 32 VFP
      * registers: QEMU's "cortex-a15" CPU is always a
      * VFP-D32 core. The simplest way to do this is just
diff --git a/target-arm/kvm64.c b/target-arm/kvm64.c
index 02bba45..b0490dd 100644
--- a/target-arm/kvm64.c
+++ b/target-arm/kvm64.c
@@ -77,29 +77,23 @@ bool kvm_arm_get_host_cpu_features(ARMHostCPUClass *ahcc)
 
 int kvm_arch_init_vcpu(CPUState *cs)
 {
-    ARMCPU *cpu = ARM_CPU(cs);
-    struct kvm_vcpu_init init;
     int ret;
+    ARMCPU *cpu = ARM_CPU(cs);
 
-    if (cpu->kvm_target == QEMU_KVM_ARM_TARGET_NONE ||
-        !arm_feature(&cpu->env, ARM_FEATURE_AARCH64)) {
-        fprintf(stderr, "KVM is not supported for this guest CPU type\n");
+    if (!arm_feature(&cpu->env, ARM_FEATURE_AARCH64)) {
+        fprintf(stderr, "KVM only support Aarch64 CPU type\n");
         return -EINVAL;
     }
 
-    init.target = cpu->kvm_target;
-    memset(init.features, 0, sizeof(init.features));
-    if (cpu->start_powered_off) {
-        init.features[0] |= 1 << KVM_ARM_VCPU_POWER_OFF;
-    }
-    if (kvm_check_extension(cs->kvm_state, KVM_CAP_ARM_PSCI_0_2)) {
-        init.features[0] |= 1 << KVM_ARM_VCPU_PSCI_0_2;
+    /* Do KVM_ARM_VCPU_INIT ioctl */
+    ret = kvm_arm_vcpu_init(cs, 0x0);
+    if (ret) {
+        return ret;
     }
-    ret = kvm_vcpu_ioctl(cs, KVM_ARM_VCPU_INIT, &init);
 
     /* TODO : support for save/restore/reset of system regs via tuple list */
 
-    return ret;
+    return 0;
 }
 
 #define AARCH64_CORE_REG(x)   (KVM_REG_ARM64 | KVM_REG_SIZE_U64 | \
diff --git a/target-arm/kvm_arm.h b/target-arm/kvm_arm.h
index 137c567..1889ba1 100644
--- a/target-arm/kvm_arm.h
+++ b/target-arm/kvm_arm.h
@@ -15,6 +15,20 @@
 #include "exec/memory.h"
 
 /**
+ * kvm_arm_vcpu_init:
+ * @cs: CPUState
+ * @feature0_extra: additional features
+ *
+ * KVM ARM and KVM ARM64 need to use KVM_ARM_VCPU_INIT ioctl for
+ * init/re-init/reset the VCPU with given feature flags.
+ * This is a common function for doing KVM_ARM_VCPU_INIT ioctl
+ * independent of KVM ARM or KVM ARM64.
+ *
+ * Returns: 0 if success else < 0 error code
+ */
+int kvm_arm_vcpu_init(CPUState *cs, uint32_t feature0_extra);
+
+/**
  * kvm_arm_register_device:
  * @mr: memory region for this device
  * @devid: the KVM device ID
-- 
1.7.9.5

[Qemu-devel] [RFC PATCH V3 7/7] target-arm: Implement kvm_arch_reset_vcpu() for KVM ARM64

[Pranavkumar Sawargaonkar]

To implement kvm_arch_reset_vcpu(), we simply re-init the VCPU
using kvm_arm_vcpu_init() so that all registers of VCPU are set
to their reset values by in-kernel KVM code.

Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
Signed-off-by: Anup Patel <anup.patel@linaro.org>
---
 target-arm/kvm64.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/target-arm/kvm64.c b/target-arm/kvm64.c
index b0490dd..fc23da3 100644
--- a/target-arm/kvm64.c
+++ b/target-arm/kvm64.c
@@ -198,4 +198,8 @@ int kvm_arch_get_registers(CPUState *cs)
 
 void kvm_arch_reset_vcpu(CPUState *cs)
 {
+    /* Re-init VCPU so that all registers are set to
+     * their respective reset values.
+     */
+    kvm_arm_vcpu_init(cs, 0x0);
 }
-- 
1.7.9.5