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exosphere: support enabling usermode pmu regs (closes #703)

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This commit is contained in:
Michael Scire
2019-12-07 15:35:34 -08:00
parent ea49c2ccd1
commit 7e6ff1f327
9 changed files with 46 additions and 10 deletions
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23
exosphere/src/configitem.c
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@@ -13,7 +13,7 @@
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <atmosphere/version.h>
@@ -38,6 +38,7 @@
static bool g_hiz_mode_enabled = false;
static bool g_debugmode_override_user = false, g_debugmode_override_priv = false;
static bool g_enable_usermode_exception_handlers = true;
static bool g_enable_usermode_pmu_access = false;
uint32_t configitem_set(bool privileged, ConfigItem item, uint64_t value) {
switch (item) {
@@ -63,14 +64,14 @@ uint32_t configitem_set(bool privileged, ConfigItem item, uint64_t value) {
/* Set SVC handler to jump to reboot stub in IRAM. */
MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x520ull) = 0x4003F000;
MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x53Cull) = 0x6000F208;
/* Copy reboot stub payload. */
ams_map_irampage(0x4003F000);
for (unsigned int i = 0; i < rebootstub_bin_size; i += 4) {
MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_AMS_IRAM_PAGE) + i) = read32le(rebootstub_bin, i);
}
ams_unmap_irampage();
/* Ensure stub is flushed. */
flush_dcache_all();
break;
@@ -95,7 +96,7 @@ uint32_t configitem_set(bool privileged, ConfigItem item, uint64_t value) {
/* Set SVC handler to jump to reboot stub in IRAM. */
MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x520ull) = 0x4003F000;
MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x53Cull) = 0x6000F208;
/* Copy reboot stub payload. */
ams_map_irampage(0x4003F000);
for (unsigned int i = 0; i < rebootstub_bin_size; i += 4) {
@@ -104,7 +105,7 @@ uint32_t configitem_set(bool privileged, ConfigItem item, uint64_t value) {
/* Tell rebootstub to shut down. */
MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_AMS_IRAM_PAGE) + 0x10) = 0x0;
ams_unmap_irampage();
MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x400ull) = 0x10;
while (1) { }
}
@@ -112,7 +113,7 @@ uint32_t configitem_set(bool privileged, ConfigItem item, uint64_t value) {
default:
return 2;
}
return 0;
}
@@ -168,6 +169,10 @@ void configitem_disable_usermode_exception_handlers(void) {
g_enable_usermode_exception_handlers = false;
}
void configitem_enable_usermode_pmu_access(void) {
g_enable_usermode_pmu_access = true;
}
uint32_t configitem_get(bool privileged, ConfigItem item, uint64_t *p_outvalue) {
uint32_t result = 0;
switch (item) {
@@ -222,6 +227,10 @@ uint32_t configitem_get(bool privileged, ConfigItem item, uint64_t *p_outvalue)
if (g_enable_usermode_exception_handlers) {
config |= KERNELCONFIGFLAG_ENABLE_USER_EXCEPTION_HANDLERS;
}
/* Allow for enabling usermode pmu access. */
if (g_enable_usermode_pmu_access) {
config |= KERNELCONFIGFLAG_ENABLE_USER_PMU_ACCESS;
}
*p_outvalue = config;
}
break;
@@ -262,7 +271,7 @@ uint32_t configitem_get(bool privileged, ConfigItem item, uint64_t *p_outvalue)
break;
case CONFIGITEM_EXOSPHERE_VERSION:
/* UNOFFICIAL: Gets information about the current exosphere version. */
*p_outvalue = ((uint64_t)(ATMOSPHERE_RELEASE_VERSION_MAJOR & 0xFF) << 32ull) |
*p_outvalue = ((uint64_t)(ATMOSPHERE_RELEASE_VERSION_MAJOR & 0xFF) << 32ull) |
((uint64_t)(ATMOSPHERE_RELEASE_VERSION_MINOR & 0xFF) << 24ull) |
((uint64_t)(ATMOSPHERE_RELEASE_VERSION_MICRO & 0xFF) << 16ull) |
((uint64_t)(exosphere_get_target_firmware() & 0xFF) << 8ull) |

5
exosphere/src/configitem.h
View File

@@ -13,7 +13,7 @@
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef EXOSPHERE_CFG_ITEM_H
#define EXOSPHERE_CFG_ITEM_H
@@ -38,7 +38,7 @@ typedef enum {
CONFIGITEM_NEWHARDWARETYPE_5X = 15,
CONFIGITEM_NEWKEYGENERATION_5X = 16,
CONFIGITEM_PACKAGE2HASH_5X = 17,
/* These are unofficial, for usage by Exosphere. */
CONFIGITEM_EXOSPHERE_VERSION = 65000,
CONFIGITEM_NEEDS_REBOOT = 65001,
@@ -61,6 +61,7 @@ bool configitem_is_debugmode_priv(void);
void configitem_set_debugmode_override(bool user, bool priv);
void configitem_disable_usermode_exception_handlers(void);
void configitem_enable_usermode_pmu_access(void);
void configitem_set_hiz_mode_enabled(bool enabled);
uint64_t configitem_get_hardware_type(void);

8
exosphere/src/exocfg.c
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@@ -84,6 +84,14 @@ unsigned int exosphere_should_disable_usermode_exception_handlers(void) {
return EXOSPHERE_CHECK_FLAG(EXOSPHERE_FLAG_DISABLE_USERMODE_EXCEPTION_HANDLERS);
}
unsigned int exosphere_should_enable_usermode_pmu_access(void) {
if (!g_has_loaded_config) {
generic_panic();
}
return EXOSPHERE_CHECK_FLAG(EXOSPHERE_FLAG_ENABLE_USERMODE_PMU_ACCESS);
}
const exo_emummc_config_t *exosphere_get_emummc_config(void) {
if (!g_has_loaded_config) {
generic_panic();

2
exosphere/src/exocfg.h
View File

@@ -40,6 +40,7 @@
#define EXOSPHERE_FLAG_IS_DEBUGMODE_PRIV (1 << 1u)
#define EXOSPHERE_FLAG_IS_DEBUGMODE_USER (1 << 2u)
#define EXOSPHERE_FLAG_DISABLE_USERMODE_EXCEPTION_HANDLERS (1 << 3u)
#define EXOSPHERE_FLAG_ENABLE_USERMODE_PMU_ACCESS (1 << 4u)
#define EXOSPHERE_FLAGS_DEFAULT (EXOSPHERE_FLAG_IS_DEBUGMODE_PRIV)
typedef struct {
@@ -58,6 +59,7 @@ unsigned int exosphere_should_perform_620_keygen(void);
unsigned int exosphere_should_override_debugmode_priv(void);
unsigned int exosphere_should_override_debugmode_user(void);
unsigned int exosphere_should_disable_usermode_exception_handlers(void);
unsigned int exosphere_should_enable_usermode_pmu_access(void);
const exo_emummc_config_t *exosphere_get_emummc_config(void);

3
exosphere/src/package2.c
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@@ -512,6 +512,9 @@ void load_package2(coldboot_crt0_reloc_list_t *reloc_list) {
if (exosphere_should_disable_usermode_exception_handlers() != 0) {
configitem_disable_usermode_exception_handlers();
}
if (exosphere_should_enable_usermode_pmu_access()) {
configitem_enable_usermode_pmu_access();
}
/* Setup the Security Engine. */
setup_se();