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* [PATCH 3/4] KVM: PPC: epapr: install ev_idle hcall for e500 guest
@ 2012-03-06 21:28 Stuart Yoder
  0 siblings, 0 replies; 2+ messages in thread
From: Stuart Yoder @ 2012-03-06 21:28 UTC (permalink / raw)
  To: agraf, kvm-ppc, kvm

From: Liu Yu-B13201 <Yu.Liu@freescale.com>

If the guest hypervisor node contains "has-idle" property.

Signed-off-by: Liu Yu <yu.liu@freescale.com>
Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
---
 arch/powerpc/include/asm/epapr_hcalls.h |   11 ++++++-----
 arch/powerpc/kernel/epapr_hcalls.S      |   27 +++++++++++++++++++++++++++
 arch/powerpc/kernel/epapr_paravirt.c    |   11 ++++++++++-
 3 files changed, 43 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/include/asm/epapr_hcalls.h b/arch/powerpc/include/asm/epapr_hcalls.h
index 2173d4c..78460ac 100644
--- a/arch/powerpc/include/asm/epapr_hcalls.h
+++ b/arch/powerpc/include/asm/epapr_hcalls.h
@@ -50,10 +50,6 @@
 #ifndef _EPAPR_HCALLS_H
 #define _EPAPR_HCALLS_H
 
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <asm/byteorder.h>
-
 #define EV_BYTE_CHANNEL_SEND		1
 #define EV_BYTE_CHANNEL_RECEIVE		2
 #define EV_BYTE_CHANNEL_POLL		3
@@ -108,6 +104,11 @@
 #define EV_UNIMPLEMENTED	12	/* Unimplemented hypercall */
 #define EV_BUFFER_OVERFLOW	13	/* Caller-supplied buffer too small */
 
+#ifndef __ASSEMBLY__
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <asm/byteorder.h>
+
 /*
  * Hypercall register clobber list
  *
@@ -500,5 +501,5 @@ static inline unsigned int ev_idle(void)
 
 	return r3;
 }
-
+#endif /* !__ASSEMBLY__ */
 #endif
diff --git a/arch/powerpc/kernel/epapr_hcalls.S b/arch/powerpc/kernel/epapr_hcalls.S
index 697b390..bf643ed 100644
--- a/arch/powerpc/kernel/epapr_hcalls.S
+++ b/arch/powerpc/kernel/epapr_hcalls.S
@@ -8,6 +8,7 @@
  */
 
 #include <linux/threads.h>
+#include <asm/epapr_hcalls.h>
 #include <asm/reg.h>
 #include <asm/page.h>
 #include <asm/cputable.h>
@@ -15,6 +16,32 @@
 #include <asm/ppc_asm.h>
 #include <asm/asm-offsets.h>
 
+_GLOBAL(epapr_ev_idle)
+epapr_ev_idle:
+	rlwinm	r3,r1,0,0,31-THREAD_SHIFT	/* current thread_info */
+	lwz	r4,TI_LOCAL_FLAGS(r3)	/* set napping bit */
+	ori	r4,r4,_TLF_NAPPING	/* so when we take an exception */
+	stw	r4,TI_LOCAL_FLAGS(r3)	/* it will return to our caller */
+
+	wrteei	1
+
+idle_loop:
+	LOAD_REG_IMMEDIATE(r11, EV_HCALL_TOKEN(EV_IDLE))
+
+.global epapr_ev_idle_start
+epapr_ev_idle_start:
+	li	r3, -1
+	nop
+	nop
+	nop
+
+	/*
+	 * Guard against spurious wakeups from a hypervisor --
+	 * only interrupt will cause us to return to LR due to
+	 * _TLF_NAPPING.
+	 */
+	b	idle_loop
+
 /* Hypercall entry point. Will be patched with device tree instructions. */
 .global epapr_hypercall_start
 epapr_hypercall_start:
diff --git a/arch/powerpc/kernel/epapr_paravirt.c b/arch/powerpc/kernel/epapr_paravirt.c
index 028aeae..f3eab85 100644
--- a/arch/powerpc/kernel/epapr_paravirt.c
+++ b/arch/powerpc/kernel/epapr_paravirt.c
@@ -21,6 +21,10 @@
 #include <asm/epapr_hcalls.h>
 #include <asm/cacheflush.h>
 #include <asm/code-patching.h>
+#include <asm/machdep.h>
+
+extern void epapr_ev_idle(void);
+extern u32 epapr_ev_idle_start[];
 
 bool epapr_paravirt_enabled;
 
@@ -41,8 +45,13 @@ static int __init epapr_paravirt_init(void)
 	if (len % 4 || len > (4 * 4))
 		return -ENODEV;
 
-	for (i = 0; i < (len / 4); i++)
+	for (i = 0; i < (len / 4); i++) {
 		patch_instruction(epapr_hypercall_start + i, insts[i]);
+		patch_instruction(epapr_ev_idle_start + i, insts[i]);
+	}
+
+	if (of_get_property(hyper_node, "has-idle", NULL))
+		ppc_md.power_save = epapr_ev_idle;
 
 	epapr_paravirt_enabled = true;
 
-- 
1.7.3.4

^ permalink raw reply related	[flat|nested] 2+ messages in thread
* [PATCH v8 0/4] KVM: PPC: Add ePAPR idle hcall support
@ 2012-03-07 22:31 Stuart Yoder
  2012-03-07 22:31 ` [PATCH 3/4] KVM: PPC: epapr: install ev_idle hcall for e500 guest Stuart Yoder
  0 siblings, 1 reply; 2+ messages in thread
From: Stuart Yoder @ 2012-03-07 22:31 UTC (permalink / raw)
  To: agraf, kvm-ppc, kvm

From: Stuart Yoder <stuart.yoder@freescale.com>

-v8
    -updates hcall instruction for e500mc

Liu Yu-B13201 (4):
  KVM: PPC: epapr: Factor out the epapr init
  KVM: PPC: epapr: Add idle hcall support for host
  KVM: PPC: epapr: install ev_idle hcall for e500 guest
  KVM: PPC: epapr: Update other hypercall invoking

 arch/powerpc/include/asm/Kbuild         |    1 +
 arch/powerpc/include/asm/epapr_hcalls.h |   35 ++++++++++--------
 arch/powerpc/include/asm/fsl_hcalls.h   |   36 +++++++++---------
 arch/powerpc/include/asm/kvm_para.h     |   14 ++++++-
 arch/powerpc/kernel/Makefile            |    1 +
 arch/powerpc/kernel/epapr_hcalls.S      |   52 ++++++++++++++++++++++++++
 arch/powerpc/kernel/epapr_paravirt.c    |   61 +++++++++++++++++++++++++++++++
 arch/powerpc/kernel/kvm.c               |   28 ++-------------
 arch/powerpc/kernel/kvm_emul.S          |   10 -----
 arch/powerpc/kvm/booke.c                |    6 +++
 arch/powerpc/kvm/powerpc.c              |   14 ++++++-
 arch/powerpc/platforms/Kconfig          |   10 +++++
 drivers/tty/Kconfig                     |    1 +
 drivers/virt/Kconfig                    |    1 +
 include/linux/kvm.h                     |    2 +
 15 files changed, 199 insertions(+), 73 deletions(-)
 create mode 100644 arch/powerpc/kernel/epapr_hcalls.S
 create mode 100644 arch/powerpc/kernel/epapr_paravirt.c

-- 
1.7.3.4

^ permalink raw reply	[flat|nested] 2+ messages in thread
end of thread, other threads:[~2012-03-07 22:32 UTC | newest]

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