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[Qemu-devel] [PULL 02/52] ppc: spapr-rtas - implement os-term rtas call
From: |
Alexander Graf |
Subject: |
[Qemu-devel] [PULL 02/52] ppc: spapr-rtas - implement os-term rtas call |
Date: |
Thu, 4 Sep 2014 19:19:50 +0200 |
From: Nikunj A Dadhania <address@hidden>
PAPR compliant guest calls this in absence of kdump. This finally
reaches the guest and can be handled according to the policies set by
higher level tools(like taking dump) for further analysis by tools like
crash.
Linux kernel calls ibm,os-term when extended property of os-term is set.
This makes sure that a return to the linux kernel is gauranteed.
Signed-off-by: Nikunj A Dadhania <address@hidden>
[agraf: reduce RTAS_TOKEN_MAX]
Signed-off-by: Alexander Graf <address@hidden>
---
hw/ppc/spapr.c | 9 +++++++++
hw/ppc/spapr_rtas.c | 15 +++++++++++++++
include/hw/ppc/spapr.h | 3 +--
3 files changed, 25 insertions(+), 2 deletions(-)
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 5cb452f..6bb646c 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -502,6 +502,15 @@ static void *spapr_create_fdt_skel(hwaddr initrd_base,
_FDT((fdt_property_cell(fdt, "rtas-error-log-max", RTAS_ERROR_LOG_MAX)));
+ /*
+ * According to PAPR, rtas ibm,os-term, does not gaurantee a return
+ * back to the guest cpu.
+ *
+ * While an additional ibm,extended-os-term property indicates that
+ * rtas call return will always occur. Set this property.
+ */
+ _FDT((fdt_property(fdt, "ibm,extended-os-term", NULL, 0)));
+
_FDT((fdt_end_node(fdt)));
/* interrupt controller */
diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c
index 9ba1ba6..2ec2a8e 100644
--- a/hw/ppc/spapr_rtas.c
+++ b/hw/ppc/spapr_rtas.c
@@ -277,6 +277,19 @@ static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu,
rtas_st(rets, 0, ret);
}
+static void rtas_ibm_os_term(PowerPCCPU *cpu,
+ sPAPREnvironment *spapr,
+ uint32_t token, uint32_t nargs,
+ target_ulong args,
+ uint32_t nret, target_ulong rets)
+{
+ target_ulong ret = 0;
+
+ qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_PAUSE, &error_abort);
+
+ rtas_st(rets, 0, ret);
+}
+
static struct rtas_call {
const char *name;
spapr_rtas_fn fn;
@@ -404,6 +417,8 @@ static void core_rtas_register_types(void)
spapr_rtas_register(RTAS_IBM_SET_SYSTEM_PARAMETER,
"ibm,set-system-parameter",
rtas_ibm_set_system_parameter);
+ spapr_rtas_register(RTAS_IBM_OS_TERM, "ibm,os-term",
+ rtas_ibm_os_term);
}
type_init(core_rtas_register_types)
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index bbba51a..7fff979 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -382,9 +382,8 @@ int spapr_allocate_irq_block(int num, bool lsi, bool msi);
#define RTAS_GET_SENSOR_STATE (RTAS_TOKEN_BASE + 0x1D)
#define RTAS_IBM_CONFIGURE_CONNECTOR (RTAS_TOKEN_BASE + 0x1E)
#define RTAS_IBM_OS_TERM (RTAS_TOKEN_BASE + 0x1F)
-#define RTAS_IBM_EXTENDED_OS_TERM (RTAS_TOKEN_BASE + 0x20)
-#define RTAS_TOKEN_MAX (RTAS_TOKEN_BASE + 0x21)
+#define RTAS_TOKEN_MAX (RTAS_TOKEN_BASE + 0x20)
/* RTAS ibm,get-system-parameter token values */
#define RTAS_SYSPARM_SPLPAR_CHARACTERISTICS 20
--
1.8.1.4
- [Qemu-devel] [PULL 00/52] ppc patch queue 2014-09-04, Alexander Graf, 2014/09/04
- [Qemu-devel] [PULL 03/52] linux-user: Fix Stack Pointer Bug in PPC setup_rt_frame, Alexander Graf, 2014/09/04
- [Qemu-devel] [PULL 04/52] linux-user: Split PPC Trampoline Encoding from Register Save, Alexander Graf, 2014/09/04
- [Qemu-devel] [PULL 12/52] spapr: fix possible memory leak, Alexander Graf, 2014/09/04
- [Qemu-devel] [PULL 09/52] hw/ppc/spapr_hcall.c: Fix typo in function names, Alexander Graf, 2014/09/04
- [Qemu-devel] [PULL 02/52] ppc: spapr-rtas - implement os-term rtas call,
Alexander Graf <=
- [Qemu-devel] [PULL 07/52] linux-user: Implement do_setcontext for PPC64, Alexander Graf, 2014/09/04
- [Qemu-devel] [PULL 05/52] linux-user: Enable Signal Handlers on PPC64, Alexander Graf, 2014/09/04
- [Qemu-devel] [PULL 13/52] spapr: Move DT memory node rendering to a helper, Alexander Graf, 2014/09/04
- [Qemu-devel] [PULL 08/52] linux-user: Handle PPC64 ELFv2 Function Pointers, Alexander Graf, 2014/09/04
- [Qemu-devel] [PULL 15/52] spapr: Refactor spapr_populate_memory() to allow memoryless nodes, Alexander Graf, 2014/09/04
- [Qemu-devel] [PULL 10/52] spapr: add uuid/host details to device tree, Alexander Graf, 2014/09/04
- [Qemu-devel] [PULL 01/52] PPC: KVM: Fix g3beige and mac99 when HV is loaded, Alexander Graf, 2014/09/04
- [Qemu-devel] [PULL 17/52] spapr: Add a helper for node0_size calculation, Alexander Graf, 2014/09/04
- [Qemu-devel] [PULL 16/52] spapr: Split memory nodes to power-of-two blocks, Alexander Graf, 2014/09/04
- [Qemu-devel] [PULL 06/52] linux-user: Properly Dereference PPC64 ELFv1 Signal Handler Pointer, Alexander Graf, 2014/09/04