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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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104
exosphere/mc.c Normal file
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@ -0,0 +1,104 @@
#include <stdint.h>
#include "mmu.h"
#include "mc.h"
volatile security_carveout_t *get_carveout_by_id(unsigned int carveout) {
if (CARVEOUT_ID_MIN <= carveout <= CARVEOUT_ID_MAX) {
return (volatile security_carveout_t *)(MC_BASE + 0xC08ULL + 0x50 * (carveout - CARVEOUT_ID_MIN));
}
panic();
return NULL;
switch (carveout) {
case 4: /* Kernel carveout */
return (volatile security_carveout_t *)(MC_BASE + 0xCF8ULL);
case 5: /* Unused Kernel carveout */
return (volatile security_carveout_t *)(MC_BASE + 0xD48ULL);
default:
panic();
return NULL;
}
}
void configure_default_carveouts(void) {
/* Configure Carveout 1 (UNUSED) */
volatile security_carveout_t *carveout = get_carveout_by_id(1);
carveout->paddr_low = 0;
carveout->paddr_high = 0;
carveout->size_big_pages = 0;
carveout->flags_0 = 0;
carveout->flags_1 = 0;
carveout->flags_2 = 0;
carveout->flags_3 = 0;
carveout->flags_4 = 0;
carveout->flags_5 = 0;
carveout->flags_6 = 0;
carveout->flags_7 = 0;
carveout->flags_8 = 0;
carveout->flags_9 = 0;
carveout->allowed_clients = 0x04000006;
/* Configure Carveout 2 (GPU UCODE) */
carveout = get_carveout_by_id(2);
carveout->paddr_low = 0x80020000;
carveout->paddr_high = 0;
carveout->size_big_pages = 2; /* 0x40000 */
carveout->flags_0 = 0;
carveout->flags_1 = 0;
carveout->flags_2 = 0x3000000;
carveout->flags_3 = 0;
carveout->flags_4 = 0x300;
carveout->flags_5 = 0;
carveout->flags_6 = 0;
carveout->flags_7 = 0;
carveout->flags_8 = 0;
carveout->flags_9 = 0;
carveout->allowed_clients = 0x440167E;
/* Configure Carveout 3 (UNUSED GPU) */
carveout = get_carveout_by_id(3);
carveout->paddr_low = 0;
carveout->paddr_high = 0;
carveout->size_big_pages = 0;
carveout->flags_0 = 0;
carveout->flags_1 = 0;
carveout->flags_2 = 0x3000000;
carveout->flags_3 = 0;
carveout->flags_4 = 0x300;
carveout->flags_5 = 0;
carveout->flags_6 = 0;
carveout->flags_7 = 0;
carveout->flags_8 = 0;
carveout->flags_9 = 0;
carveout->allowed_clients = 0x4401E7E;
/* Configure default Kernel carveouts based on 2.0.0+. */
/* Configure Carveout 4 (KERNEL_BUILTINS) */
configure_kernel_carveout(5, 0x80060000, KERNEL_CARVEOUT_SIZE_MAX);
/* Configure Carveout 5 (KERNEL_UNUSED) */
configure_kernel_carveout(5, 0, 0);
}
void configure_kernel_carveout(unsigned int carveout_id, uint64_t address, uint64_t size) {
if (carveout_id != 4 && carveout_id != 5) {
panic();
}
volatile security_carveout_t *carveout = get_carveout_by_id(carveout_id);
carveout->paddr_low = (uint32_t)(address & 0xFFFFFFFF);
carveout->paddr_high = (uint32_t)(address >> 32);
carveout->size_big_pages = (uint32_t)(size >> 17);
carveout->flags_0 = 0x70E3407F;
carveout->flags_1 = 0x1A620880;
carveout->flags_2 = 0x303C00;
carveout->flags_3 = 0xCF0830BB;
carveout->flags_4 = 0x3;
carveout->flags_5 = 0;
carveout->flags_6 = 0;
carveout->flags_7 = 0;
carveout->flags_8 = 0;
carveout->flags_9 = 0;
carveout->allowed_clients = 0x8B;
}

40
exosphere/mc.h Normal file
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@ -0,0 +1,40 @@
#ifndef EXOSPHERE_MC_H
#define EXOSPHERE_MC_H
#include <stdint.h>
#include "mmu.h"
/* Exosphere driver for the Tegra X1 Memory Controller. */
#define MC_BASE (mmio_get_device_address(MMIO_DEVID_MC))
#define CARVEOUT_ID_MIN 1
#define CARVEOUT_ID_MAX 5
#define KERNEL_CARVEOUT_SIZE_MAX 0x1FFE0000
typedef struct {
uint32_t allowed_clients;
uint32_t paddr_low;
uint32_t paddr_high;
uint32_t size_big_pages;
uint32_t flags_0;
uint32_t flags_1;
uint32_t flags_2;
uint32_t flags_3;
uint32_t flags_4;
uint32_t flags_5;
uint32_t flags_6;
uint32_t flags_7;
uint32_t flags_8;
uint32_t flags_9;
uint8_t padding[0x28];
} security_carveout_t;
volatile security_carveout_t *get_carveout_by_id(unsigned int carveout);
void configure_default_carveouts(void);
void configure_kernel_carveout(unsigned int carveout_id, uint64_t address, uint64_t size);
#endif

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;
}