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ARMv8/sec_firmware : Update chosen/kaslr-seed with random number

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kASLR support in kernel requires a random number to be passed via
chosen/kaslr-seed propert. sec_firmware generates this random seed
which can then be passed in the device tree node.

sec_firmware reserves JR3 for it's own usage. Node for JR3 is
removed from device-tree.

Signed-off-by: Ruchika Gupta <ruchika.gupta@nxp.com>
This commit is contained in:
Ruchika Gupta
2017-08-16 15:58:10 +05:30
committed by Tom Rini
parent 225bfd3906
commit a797f274d7
3 changed files with 142 additions and 3 deletions
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9
arch/arm/include/asm/armv8/sec_firmware.h
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@@ -8,10 +8,14 @@
#define __SEC_FIRMWARE_H_
#define PSCI_INVALID_VER 0xffffffff
#define SEC_JR3_OFFSET 0x40000
int sec_firmware_init(const void *, u32 *, u32 *);
int _sec_firmware_entry(const void *, u32 *, u32 *);
bool sec_firmware_is_valid(const void *);
bool sec_firmware_support_hwrng(void);
int sec_firmware_get_random(uint8_t *rand, int bytes);
int fdt_fixup_kaslr(void *fdt);
#ifdef CONFIG_SEC_FIRMWARE_ARMV8_PSCI
unsigned int sec_firmware_support_psci_version(void);
unsigned int _sec_firmware_support_psci_version(void);
@@ -22,4 +26,9 @@ static inline unsigned int sec_firmware_support_psci_version(void)
}
#endif
static inline unsigned int sec_firmware_used_jobring_offset(void)
{
return SEC_JR3_OFFSET;
}
#endif /* __SEC_FIRMWARE_H_ */