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Code Issues Releases Activity

Exosphere: Fix carveout saving (warmboot now works on 5.1.0)

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This commit is contained in:
Michael Scire 2018-08-16 20:17:37 -07:00
parent a0deea8ae0
commit 46f68fcbff
1 changed files with 15 additions and 2 deletions
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17
exosphere/src/mc.c
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@ -4,6 +4,16 @@
#include "mc.h"
#include "exocfg.h"
typedef struct {
uint64_t address;
uint64_t size;
} saved_carveout_info_t;
static saved_carveout_info_t g_saved_carveouts[2] = {
{0x80060000ull, KERNEL_CARVEOUT_SIZE_MAX},
{0x00000000ull, 0x00000000ull}
};
volatile security_carveout_t *get_carveout_by_id(unsigned int carveout) {
if (CARVEOUT_ID_MIN <= carveout && carveout <= CARVEOUT_ID_MAX) {
return (volatile security_carveout_t *)(MC_BASE + 0xC08ull + 0x50 * (carveout - CARVEOUT_ID_MIN));
@ -67,10 +77,10 @@ void configure_default_carveouts(void) {
/* Configure default Kernel carveouts based on 2.0.0+. */
if (exosphere_get_target_firmware() >= EXOSPHERE_TARGET_FIRMWARE_200) {
/* Configure Carveout 4 (KERNEL_BUILTINS) */
configure_kernel_carveout(4, 0x80060000, KERNEL_CARVEOUT_SIZE_MAX);
configure_kernel_carveout(4, g_saved_carveouts[0].address, g_saved_carveouts[0].size);
/* Configure Carveout 5 (KERNEL_UNUSED) */
configure_kernel_carveout(5, 0, 0);
configure_kernel_carveout(5, g_saved_carveouts[1].address, g_saved_carveouts[1].size);
} else {
for (unsigned int i = 4; i <= 5; i++) {
carveout = get_carveout_by_id(i);
@ -96,6 +106,9 @@ void configure_kernel_carveout(unsigned int carveout_id, uint64_t address, uint6
if (carveout_id != 4 && carveout_id != 5) {
generic_panic();
}
g_saved_carveouts[carveout_id-4].address = address;
g_saved_carveouts[carveout_id-4].size = size;
volatile security_carveout_t *carveout = get_carveout_by_id(carveout_id);
carveout->paddr_low = (uint32_t)(address & 0xFFFFFFFF);