| Message ID | 20250217071934.86131-7-adityag@linux.ibm.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Implement MPIPL for PowerNV | expand |
On 2/17/25 12:49, Aditya Gupta wrote: > Add offsets for the processor state captured during MPIPL dump. > > This is incomplete. And might be implemented in future if the effort to > implement MPIPL is resumed again. Please use RFC prefix in next iteration of patch series until the patches are requested to be merged. > > Signed-off-by: Aditya Gupta <adityag@linux.ibm.com> > --- > hw/ppc/pnv_sbe.c | 27 +++++++++++++++++++++++++++ > 1 file changed, 27 insertions(+) > > diff --git a/hw/ppc/pnv_sbe.c b/hw/ppc/pnv_sbe.c > index ee905df4e0a6..3b50667226b5 100644 > --- a/hw/ppc/pnv_sbe.c > +++ b/hw/ppc/pnv_sbe.c > @@ -197,6 +197,25 @@ struct mdrt_table { > __be64 padding; /* unused */ > } __packed; > > +/* > + * Processor Dump Area > + * > + * This contains the information needed for having processor > + * state captured during a platform dump. > + */ > +struct proc_dump_area { > + __be32 thread_size; /* Size of each thread register entry */ > +#define PROC_DUMP_AREA_FORMAT_P9 0x1 /* P9 format */ > + uint8_t version; > + uint8_t reserved[11]; > + __be64 alloc_addr; /* Destination memory to place register data */ > + __be32 reserved2; > + __be32 alloc_size; /* Allocated size */ > + __be64 dest_addr; /* Destination address */ > + __be32 reserved3; > + __be32 act_size; /* Actual data size */ > +} __packed; > + Above should go into pnv_sbe.h and introduce when actually get used. > static void pnv_sbe_set_host_doorbell(PnvSBE *sbe, uint64_t val) > { > val &= SBE_HOST_RESPONSE_MASK; /* Is this right? What does HW do? */ > @@ -281,6 +300,11 @@ static void pnv_mpipl_preserve_mem(void) > cpu_physical_memory_write(MDRT_TABLE_BASE, mdrt, MDRT_TABLE_SIZE); > } > > +static void pnv_mpipl_save_proc_regs(void) > +{ > + /* TODO: modify PROC_DUMP_AREA_BASE */ > +} > + > static void pnv_sbe_power9_xscom_ctrl_write(void *opaque, hwaddr addr, > uint64_t val, unsigned size) > { > @@ -307,6 +331,9 @@ static void pnv_sbe_power9_xscom_ctrl_write(void *opaque, hwaddr addr, > /* Preserve the memory locations registered for MPIPL */ > pnv_mpipl_preserve_mem(); > > + /* Save processor state */ > + pnv_mpipl_save_proc_regs(); Introduce when actually get implemented, otherwise doesnt need a separate patch for this stub. > + > /* > * TODO: Pass `mpipl` node in device tree to signify next > * boot is an MPIPL boot
diff --git a/hw/ppc/pnv_sbe.c b/hw/ppc/pnv_sbe.c index ee905df4e0a6..3b50667226b5 100644 --- a/hw/ppc/pnv_sbe.c +++ b/hw/ppc/pnv_sbe.c @@ -197,6 +197,25 @@ struct mdrt_table { __be64 padding; /* unused */ } __packed; +/* + * Processor Dump Area + * + * This contains the information needed for having processor + * state captured during a platform dump. + */ +struct proc_dump_area { + __be32 thread_size; /* Size of each thread register entry */ +#define PROC_DUMP_AREA_FORMAT_P9 0x1 /* P9 format */ + uint8_t version; + uint8_t reserved[11]; + __be64 alloc_addr; /* Destination memory to place register data */ + __be32 reserved2; + __be32 alloc_size; /* Allocated size */ + __be64 dest_addr; /* Destination address */ + __be32 reserved3; + __be32 act_size; /* Actual data size */ +} __packed; + static void pnv_sbe_set_host_doorbell(PnvSBE *sbe, uint64_t val) { val &= SBE_HOST_RESPONSE_MASK; /* Is this right? What does HW do? */ @@ -281,6 +300,11 @@ static void pnv_mpipl_preserve_mem(void) cpu_physical_memory_write(MDRT_TABLE_BASE, mdrt, MDRT_TABLE_SIZE); } +static void pnv_mpipl_save_proc_regs(void) +{ + /* TODO: modify PROC_DUMP_AREA_BASE */ +} + static void pnv_sbe_power9_xscom_ctrl_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) { @@ -307,6 +331,9 @@ static void pnv_sbe_power9_xscom_ctrl_write(void *opaque, hwaddr addr, /* Preserve the memory locations registered for MPIPL */ pnv_mpipl_preserve_mem(); + /* Save processor state */ + pnv_mpipl_save_proc_regs(); + /* * TODO: Pass `mpipl` node in device tree to signify next * boot is an MPIPL boot
Add offsets for the processor state captured during MPIPL dump. This is incomplete. And might be implemented in future if the effort to implement MPIPL is resumed again. Signed-off-by: Aditya Gupta <adityag@linux.ibm.com> --- hw/ppc/pnv_sbe.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+)