Start implementing pSeries logical partition machine

This patch adds a "pseries" machine to qemu.  This aims to emulate a
logical partition on an IBM pSeries machine, compliant to the
"PowerPC Architecture Platform Requirements" (PAPR) document.

This initial version is quite limited, it implements a basic machine
and PAPR hypercall emulation.  So far only one hypercall is present -
H_PUT_TERM_CHAR - so that a (write-only) console is available.

Multiple CPUs are permitted, with SMP entry handled kexec() style.

The machine so far more resembles an old POWER4 style "full system
partition" rather than a modern LPAR, in that the guest manages the
page tables directly, rather than via hypercalls.

The machine requires qemu to be configured with --enable-fdt.  The
machine can (so far) only be booted with -kernel - i.e. no partition
firmware is provided.

Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 257 insertions, 0 deletions

diff --git a/hw/spapr.h b/hw/spapr.h
new file mode 100644
index 0000000000..685944b0f4
--- /dev/null
+++ b/hw/spapr.h
@@ -0,0 +1,257 @@
+#if !defined(__HW_SPAPR_H__)
+#define __HW_SPAPR_H__
+
+typedef struct sPAPREnvironment {
+} sPAPREnvironment;
+
+#define H_SUCCESS         0
+#define H_BUSY            1        /* Hardware busy -- retry later */
+#define H_CLOSED          2        /* Resource closed */
+#define H_NOT_AVAILABLE   3
+#define H_CONSTRAINED     4        /* Resource request constrained to max allowed */
+#define H_PARTIAL         5
+#define H_IN_PROGRESS     14       /* Kind of like busy */
+#define H_PAGE_REGISTERED 15
+#define H_PARTIAL_STORE   16
+#define H_PENDING         17       /* returned from H_POLL_PENDING */
+#define H_CONTINUE        18       /* Returned from H_Join on success */
+#define H_LONG_BUSY_START_RANGE         9900  /* Start of long busy range */
+#define H_LONG_BUSY_ORDER_1_MSEC        9900  /* Long busy, hint that 1msec \
+                                                 is a good time to retry */
+#define H_LONG_BUSY_ORDER_10_MSEC       9901  /* Long busy, hint that 10msec \
+                                                 is a good time to retry */
+#define H_LONG_BUSY_ORDER_100_MSEC      9902  /* Long busy, hint that 100msec \
+                                                 is a good time to retry */
+#define H_LONG_BUSY_ORDER_1_SEC         9903  /* Long busy, hint that 1sec \
+                                                 is a good time to retry */
+#define H_LONG_BUSY_ORDER_10_SEC        9904  /* Long busy, hint that 10sec \
+                                                 is a good time to retry */
+#define H_LONG_BUSY_ORDER_100_SEC       9905  /* Long busy, hint that 100sec \
+                                                 is a good time to retry */
+#define H_LONG_BUSY_END_RANGE           9905  /* End of long busy range */
+#define H_HARDWARE        -1       /* Hardware error */
+#define H_FUNCTION        -2       /* Function not supported */
+#define H_PRIVILEGE       -3       /* Caller not privileged */
+#define H_PARAMETER       -4       /* Parameter invalid, out-of-range or conflicting */
+#define H_BAD_MODE        -5       /* Illegal msr value */
+#define H_PTEG_FULL       -6       /* PTEG is full */
+#define H_NOT_FOUND       -7       /* PTE was not found" */
+#define H_RESERVED_DABR   -8       /* DABR address is reserved by the hypervisor on this processor" */
+#define H_NO_MEM          -9
+#define H_AUTHORITY       -10
+#define H_PERMISSION      -11
+#define H_DROPPED         -12
+#define H_SOURCE_PARM     -13
+#define H_DEST_PARM       -14
+#define H_REMOTE_PARM     -15
+#define H_RESOURCE        -16
+#define H_ADAPTER_PARM    -17
+#define H_RH_PARM         -18
+#define H_RCQ_PARM        -19
+#define H_SCQ_PARM        -20
+#define H_EQ_PARM         -21
+#define H_RT_PARM         -22
+#define H_ST_PARM         -23
+#define H_SIGT_PARM       -24
+#define H_TOKEN_PARM      -25
+#define H_MLENGTH_PARM    -27
+#define H_MEM_PARM        -28
+#define H_MEM_ACCESS_PARM -29
+#define H_ATTR_PARM       -30
+#define H_PORT_PARM       -31
+#define H_MCG_PARM        -32
+#define H_VL_PARM         -33
+#define H_TSIZE_PARM      -34
+#define H_TRACE_PARM      -35
+
+#define H_MASK_PARM       -37
+#define H_MCG_FULL        -38
+#define H_ALIAS_EXIST     -39
+#define H_P_COUNTER       -40
+#define H_TABLE_FULL      -41
+#define H_ALT_TABLE       -42
+#define H_MR_CONDITION    -43
+#define H_NOT_ENOUGH_RESOURCES -44
+#define H_R_STATE         -45
+#define H_RESCINDEND      -46
+#define H_MULTI_THREADS_ACTIVE -9005
+
+
+/* Long Busy is a condition that can be returned by the firmware
+ * when a call cannot be completed now, but the identical call
+ * should be retried later.  This prevents calls blocking in the
+ * firmware for long periods of time.  Annoyingly the firmware can return
+ * a range of return codes, hinting at how long we should wait before
+ * retrying.  If you don't care for the hint, the macro below is a good
+ * way to check for the long_busy return codes
+ */
+#define H_IS_LONG_BUSY(x)  ((x >= H_LONG_BUSY_START_RANGE) \
+                            && (x <= H_LONG_BUSY_END_RANGE))
+
+/* Flags */
+#define H_LARGE_PAGE      (1ULL<<(63-16))
+#define H_EXACT           (1ULL<<(63-24))       /* Use exact PTE or return H_PTEG_FULL */
+#define H_R_XLATE         (1ULL<<(63-25))       /* include a valid logical page num in the pte if the valid bit is set */
+#define H_READ_4          (1ULL<<(63-26))       /* Return 4 PTEs */
+#define H_PAGE_STATE_CHANGE (1ULL<<(63-28))
+#define H_PAGE_UNUSED     ((1ULL<<(63-29)) | (1ULL<<(63-30)))
+#define H_PAGE_SET_UNUSED (H_PAGE_STATE_CHANGE | H_PAGE_UNUSED)
+#define H_PAGE_SET_LOANED (H_PAGE_SET_UNUSED | (1ULL<<(63-31)))
+#define H_PAGE_SET_ACTIVE H_PAGE_STATE_CHANGE
+#define H_AVPN            (1ULL<<(63-32))       /* An avpn is provided as a sanity test */
+#define H_ANDCOND         (1ULL<<(63-33))
+#define H_ICACHE_INVALIDATE (1ULL<<(63-40))     /* icbi, etc.  (ignored for IO pages) */
+#define H_ICACHE_SYNCHRONIZE (1ULL<<(63-41))    /* dcbst, icbi, etc (ignored for IO pages */
+#define H_ZERO_PAGE       (1ULL<<(63-48))       /* zero the page before mapping (ignored for IO pages) */
+#define H_COPY_PAGE       (1ULL<<(63-49))
+#define H_N               (1ULL<<(63-61))
+#define H_PP1             (1ULL<<(63-62))
+#define H_PP2             (1ULL<<(63-63))
+
+/* VASI States */
+#define H_VASI_INVALID    0
+#define H_VASI_ENABLED    1
+#define H_VASI_ABORTED    2
+#define H_VASI_SUSPENDING 3
+#define H_VASI_SUSPENDED  4
+#define H_VASI_RESUMED    5
+#define H_VASI_COMPLETED  6
+
+/* DABRX flags */
+#define H_DABRX_HYPERVISOR (1ULL<<(63-61))
+#define H_DABRX_KERNEL     (1ULL<<(63-62))
+#define H_DABRX_USER       (1ULL<<(63-63))
+
+/* Each control block has to be on a 4K bondary */
+#define H_CB_ALIGNMENT     4096
+
+/* pSeries hypervisor opcodes */
+#define H_REMOVE                0x04
+#define H_ENTER                 0x08
+#define H_READ                  0x0c
+#define H_CLEAR_MOD             0x10
+#define H_CLEAR_REF             0x14
+#define H_PROTECT               0x18
+#define H_GET_TCE               0x1c
+#define H_PUT_TCE               0x20
+#define H_SET_SPRG0             0x24
+#define H_SET_DABR              0x28
+#define H_PAGE_INIT             0x2c
+#define H_SET_ASR               0x30
+#define H_ASR_ON                0x34
+#define H_ASR_OFF               0x38
+#define H_LOGICAL_CI_LOAD       0x3c
+#define H_LOGICAL_CI_STORE      0x40
+#define H_LOGICAL_CACHE_LOAD    0x44
+#define H_LOGICAL_CACHE_STORE   0x48
+#define H_LOGICAL_ICBI          0x4c
+#define H_LOGICAL_DCBF          0x50
+#define H_GET_TERM_CHAR         0x54
+#define H_PUT_TERM_CHAR         0x58
+#define H_REAL_TO_LOGICAL       0x5c
+#define H_HYPERVISOR_DATA       0x60
+#define H_EOI                   0x64
+#define H_CPPR                  0x68
+#define H_IPI                   0x6c
+#define H_IPOLL                 0x70
+#define H_XIRR                  0x74
+#define H_PERFMON               0x7c
+#define H_MIGRATE_DMA           0x78
+#define H_REGISTER_VPA          0xDC
+#define H_CEDE                  0xE0
+#define H_CONFER                0xE4
+#define H_PROD                  0xE8
+#define H_GET_PPP               0xEC
+#define H_SET_PPP               0xF0
+#define H_PURR                  0xF4
+#define H_PIC                   0xF8
+#define H_REG_CRQ               0xFC
+#define H_FREE_CRQ              0x100
+#define H_VIO_SIGNAL            0x104
+#define H_SEND_CRQ              0x108
+#define H_COPY_RDMA             0x110
+#define H_REGISTER_LOGICAL_LAN  0x114
+#define H_FREE_LOGICAL_LAN      0x118
+#define H_ADD_LOGICAL_LAN_BUFFER 0x11C
+#define H_SEND_LOGICAL_LAN      0x120
+#define H_BULK_REMOVE           0x124
+#define H_MULTICAST_CTRL        0x130
+#define H_SET_XDABR             0x134
+#define H_STUFF_TCE             0x138
+#define H_PUT_TCE_INDIRECT      0x13C
+#define H_CHANGE_LOGICAL_LAN_MAC 0x14C
+#define H_VTERM_PARTNER_INFO    0x150
+#define H_REGISTER_VTERM        0x154
+#define H_FREE_VTERM            0x158
+#define H_RESET_EVENTS          0x15C
+#define H_ALLOC_RESOURCE        0x160
+#define H_FREE_RESOURCE         0x164
+#define H_MODIFY_QP             0x168
+#define H_QUERY_QP              0x16C
+#define H_REREGISTER_PMR        0x170
+#define H_REGISTER_SMR          0x174
+#define H_QUERY_MR              0x178
+#define H_QUERY_MW              0x17C
+#define H_QUERY_HCA             0x180
+#define H_QUERY_PORT            0x184
+#define H_MODIFY_PORT           0x188
+#define H_DEFINE_AQP1           0x18C
+#define H_GET_TRACE_BUFFER      0x190
+#define H_DEFINE_AQP0           0x194
+#define H_RESIZE_MR             0x198
+#define H_ATTACH_MCQP           0x19C
+#define H_DETACH_MCQP           0x1A0
+#define H_CREATE_RPT            0x1A4
+#define H_REMOVE_RPT            0x1A8
+#define H_REGISTER_RPAGES       0x1AC
+#define H_DISABLE_AND_GETC      0x1B0
+#define H_ERROR_DATA            0x1B4
+#define H_GET_HCA_INFO          0x1B8
+#define H_GET_PERF_COUNT        0x1BC
+#define H_MANAGE_TRACE          0x1C0
+#define H_FREE_LOGICAL_LAN_BUFFER 0x1D4
+#define H_QUERY_INT_STATE       0x1E4
+#define H_POLL_PENDING          0x1D8
+#define H_ILLAN_ATTRIBUTES      0x244
+#define H_MODIFY_HEA_QP         0x250
+#define H_QUERY_HEA_QP          0x254
+#define H_QUERY_HEA             0x258
+#define H_QUERY_HEA_PORT        0x25C
+#define H_MODIFY_HEA_PORT       0x260
+#define H_REG_BCMC              0x264
+#define H_DEREG_BCMC            0x268
+#define H_REGISTER_HEA_RPAGES   0x26C
+#define H_DISABLE_AND_GET_HEA   0x270
+#define H_GET_HEA_INFO          0x274
+#define H_ALLOC_HEA_RESOURCE    0x278
+#define H_ADD_CONN              0x284
+#define H_DEL_CONN              0x288
+#define H_JOIN                  0x298
+#define H_VASI_STATE            0x2A4
+#define H_ENABLE_CRQ            0x2B0
+#define H_GET_EM_PARMS          0x2B8
+#define H_SET_MPP               0x2D0
+#define H_GET_MPP               0x2D4
+#define MAX_HCALL_OPCODE        H_GET_MPP
+
+extern sPAPREnvironment *spapr;
+
+/*#define DEBUG_SPAPR_HCALLS*/
+
+#ifdef DEBUG_SPAPR_HCALLS
+#define hcall_dprintf(fmt, ...) \
+    do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
+#else
+#define hcall_dprintf(fmt, ...) \
+    do { } while (0)
+#endif
+
+typedef target_ulong (*spapr_hcall_fn)(CPUState *env, sPAPREnvironment *spapr,
+                                       target_ulong opcode,
+                                       target_ulong *args);
+
+void spapr_register_hypercall(target_ulong opcode, spapr_hcall_fn fn);
+target_ulong spapr_hypercall(CPUState *env, target_ulong opcode,
+                             target_ulong *args);
+
+#endif /* !defined (__HW_SPAPR_H__) */