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| author | Cédric Le Goater <clg@kaod.org> | 2020-04-03 16:00:56 +0200 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2020-05-07 11:10:50 +1000 |
| commit | d04ea940c597201a6610c5d1712809ed35dd77ec (patch) | |
| tree | fb223686c9680f8c31fa214c96b915b1a1b1ed77 /target/ppc/excp_helper.c | |
| parent | 6bffd48b9e8efcd6977c86f2ea8437771d15043c (diff) | |
| download | qemu-d04ea940c597201a6610c5d1712809ed35dd77ec.zip | |
target/ppc: Add support for Radix partition-scoped translation
The Radix tree translation model currently supports process-scoped
translation for the PowerNV machine (Hypervisor mode) and for the
pSeries machine (Guest mode). Guests running under an emulated
Hypervisor (PowerNV machine) require a new type of Radix translation,
called partition-scoped, which is missing today.
The Radix tree translation is a 2 steps process. The first step,
process-scoped translation, converts an effective Address to a guest
real address, and the second step, partition-scoped translation,
converts a guest real address to a host real address.
There are difference cases to covers :
* Hypervisor real mode access: no Radix translation.
* Hypervisor or host application access (quadrant 0 and 3) with
relocation on: process-scoped translation.
* Guest OS real mode access: only partition-scoped translation.
* Guest OS real or guest application access (quadrant 0 and 3) with
relocation on: both process-scoped translation and partition-scoped
translations.
* Hypervisor access in quadrant 1 and 2 with relocation on: both
process-scoped translation and partition-scoped translations.
The radix tree partition-scoped translation is performed using tables
pointed to by the first double-word of the Partition Table Entries and
process-scoped translation uses tables pointed to by the Process Table
Entries (second double-word of the Partition Table Entries).
Both partition-scoped and process-scoped translations process are
identical and thus the radix tree traversing code is largely reused.
However, errors in partition-scoped translations generate hypervisor
exceptions.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20200403140056.59465-5-clg@kaod.org>
[dwg: Fixup from Greg Kurz folded in]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'target/ppc/excp_helper.c')
| -rw-r--r-- | target/ppc/excp_helper.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c index 1acc3786de..f052979664 100644 --- a/target/ppc/excp_helper.c +++ b/target/ppc/excp_helper.c @@ -506,9 +506,10 @@ static inline void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp) case POWERPC_EXCP_ISEG: /* Instruction segment exception */ case POWERPC_EXCP_TRACE: /* Trace exception */ break; + case POWERPC_EXCP_HISI: /* Hypervisor instruction storage exception */ + msr |= env->error_code; case POWERPC_EXCP_HDECR: /* Hypervisor decrementer exception */ case POWERPC_EXCP_HDSI: /* Hypervisor data storage exception */ - case POWERPC_EXCP_HISI: /* Hypervisor instruction storage exception */ case POWERPC_EXCP_HDSEG: /* Hypervisor data segment exception */ case POWERPC_EXCP_HISEG: /* Hypervisor instruction segment exception */ case POWERPC_EXCP_SDOOR_HV: /* Hypervisor Doorbell interrupt */ |