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Implement smcConfigureCarveout

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This commit is contained in:
Michael Scire 2018-02-23 01:12:38 -08:00
parent b2dc858738
commit f7598cb433
3 changed files with 172 additions and 0 deletions
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28
exosphere/smc_api.c
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@ -3,6 +3,8 @@
#include "utils.h"
#include "configitem.h"
#include "cpu_context.h"
#include "mc.h"
#include "mmu.h"
#include "smc_api.h"
#include "smc_user.h"
#include "se.h"
@ -478,3 +480,29 @@ uint32_t smc_read_write_register(smc_args_t *args) {
return 2;
}
uint32_t smc_configure_carveout(smc_args_t *args) {
if (args->X[0] > 1) {
return 2;
}
unsigned int carveout_id = (unsigned int)args->X[1];
uint64_t address = args->X[2];
uint64_t size = args->X[3];
/* Ensure carveout isn't too big. */
if (size > KERNEL_CARVEOUT_SIZE_MAX) {
return 2;
}
/* Configuration is one-shot, and cannot be done multiple times. */
static bool configured_carveouts[2] = {false, false};
if (configured_carveouts[carveout_id]) {
return 2;
}
configure_kernel_carveout(carveout_id + 4, address, size);
configured_carveouts[carveout_id] = true;
return 0;
}