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base-nova: Added syscall for querying the CPU vendor. This is helpful to implement CPU vendor-specific features in userspace drivers.

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This commit is contained in:
Michael Mueller
2023-03-27 17:11:00 +02:00
parent 9dc7af6ba8
commit 7cc6d4e828
1 changed files with 16 additions and 0 deletions
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16
repos/base-nova/src/core/include/platform.h
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@@ -20,6 +20,7 @@
#include <core_mem_alloc.h>
#include <address_space.h>
#include <base/allocator.h>
#include <nova/syscall-generic.h>
namespace Genode {
@@ -51,9 +52,13 @@ namespace Genode {
/* map of virtual cpu ids in Genode to kernel cpu ids */
uint8_t map_cpu_ids[MAX_SUPPORTED_CPUS];
/* map of virtual cpu ids in Genode to kernel NUMA ids */
uint8_t cpu_numa_map[MAX_SUPPORTED_CPUS];
/* map of kernel NUMA region to Genode memory ranges */
Genode::Range_allocator::Range numa_mem_ranges[MAX_SUPPORTED_CPUS]; // TODO: Add new macro for max of numa regions
addr_t _map_pages(addr_t phys_page, addr_t pages,
bool guard_page = false);
@@ -164,6 +169,17 @@ namespace Genode {
}
}
}
/**
* @brief Return NUMA-interal vendor code for CPU
*
*/
Nova::Hip::Cpu_desc::Vendor cpu_vendor() {
extern addr_t __initial_sp;
Nova::Hip const &hip = *(Nova::Hip *)__initial_sp;
return static_cast<Nova::Hip::Cpu_desc::Vendor>(hip.cpu_desc_of_cpu(0)->vendor);
}
};
}