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spapr: add rtas_st_buffer_direct() helper

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This is similar to the existing rtas_st_buffer(), but for cases
where the guest is not expecting a length-encoded byte array.
Namely, for calls where a "work area" buffer is used to pass
around arbitrary fields/data.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Michael Roth 2015-05-07 15:33:47 +10:00 committed by Alexander Graf
parent 886445a6ee
commit ab316865db
1 changed files with 8 additions and 2 deletions
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10
include/hw/ppc/spapr.h
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@ -464,6 +464,13 @@ static inline void rtas_st(target_ulong phys, int n, uint32_t val)
stl_be_phys(&address_space_memory, ppc64_phys_to_real(phys + 4*n), val);
}
static inline void rtas_st_buffer_direct(target_ulong phys,
target_ulong phys_len,
uint8_t *buffer, uint16_t buffer_len)
{
cpu_physical_memory_write(ppc64_phys_to_real(phys), buffer,
MIN(buffer_len, phys_len));
}
static inline void rtas_st_buffer(target_ulong phys, target_ulong phys_len,
uint8_t *buffer, uint16_t buffer_len)
@ -473,8 +480,7 @@ static inline void rtas_st_buffer(target_ulong phys, target_ulong phys_len,
}
stw_be_phys(&address_space_memory,
ppc64_phys_to_real(phys), buffer_len);
cpu_physical_memory_write(ppc64_phys_to_real(phys + 2),
buffer, MIN(buffer_len, phys_len - 2));
rtas_st_buffer_direct(phys + 2, phys_len - 2, buffer, buffer_len);
}
typedef void (*spapr_rtas_fn)(PowerPCCPU *cpu, sPAPREnvironment *spapr,