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cxl: New hcalls to support cxl adapters

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The hypervisor calls provide an interface with a coherent platform
facility and function. It matches version 0.16 of the 'PAPR changes'
document.

The following hcalls are supported:
H_ATTACH_CA_PROCESS    Attach a process element to a coherent platform
                       function.
H_DETACH_CA_PROCESS    Detach a process element from a coherent
                       platform function.
H_CONTROL_CA_FUNCTION  Allow the partition to manipulate or query
                       certain coherent platform function behaviors.
H_COLLECT_CA_INT_INFO  Collect interrupt info about a coherent.
                       platform function after an interrupt occurred
H_CONTROL_CA_FAULTS    Control the operation of a coherent platform
                       function after a fault occurs.
H_DOWNLOAD_CA_FACILITY Support for downloading a base adapter image to
                       the coherent platform facility, and for
                       validating the entire image after the download.
H_CONTROL_CA_FACILITY  Allow the partition to manipulate or query
                       certain coherent platform facility behaviors.

Co-authored-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Reviewed-by: Manoj Kumar <manoj@linux.vnet.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Lombard
2016-03-04 12:26:34 +01:00
committed by Michael Ellerman
parent c0efa9aee8
commit 444c4ba461
5 changed files with 890 additions and 2 deletions
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26
drivers/misc/cxl/main.c
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@@ -162,6 +162,32 @@ int cxl_alloc_sst(struct cxl_context *ctx)
return 0;
}
/* print buffer content as integers when debugging */
void cxl_dump_debug_buffer(void *buf, size_t buf_len)
{
#ifdef DEBUG
int i, *ptr;
/*
* We want to regroup up to 4 integers per line, which means they
* need to be in the same pr_devel() statement
*/
ptr = (int *) buf;
for (i = 0; i * 4 < buf_len; i += 4) {
if ((i + 3) * 4 < buf_len)
pr_devel("%.8x %.8x %.8x %.8x\n", ptr[i], ptr[i + 1],
ptr[i + 2], ptr[i + 3]);
else if ((i + 2) * 4 < buf_len)
pr_devel("%.8x %.8x %.8x\n", ptr[i], ptr[i + 1],
ptr[i + 2]);
else if ((i + 1) * 4 < buf_len)
pr_devel("%.8x %.8x\n", ptr[i], ptr[i + 1]);
else
pr_devel("%.8x\n", ptr[i]);
}
#endif /* DEBUG */
}
/* Find a CXL adapter by it's number and increase it's refcount */
struct cxl *get_cxl_adapter(int num)
{