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| author | Jeenu Viswambharan <jeenu.viswambharan@arm.com> | 2017-10-19 09:15:15 +0100 |
|---|---|---|
| committer | Jeenu Viswambharan <jeenu.viswambharan@arm.com> | 2017-11-13 08:38:51 +0000 |
| commit | 781f4aac76b56c059bb70b06b71a5c8ef2211844 (patch) | |
| tree | 46dfa52803feb7a51ad4449af71f416fb22590f9 /plat | |
| parent | 71e7a4e568e5f73f67cb571e6dfab3015b986c7b (diff) | |
| download | platform_external_arm-trusted-firmware-781f4aac76b56c059bb70b06b71a5c8ef2211844.tar.gz platform_external_arm-trusted-firmware-781f4aac76b56c059bb70b06b71a5c8ef2211844.tar.bz2 platform_external_arm-trusted-firmware-781f4aac76b56c059bb70b06b71a5c8ef2211844.zip | |
ARM platforms: Provide SDEI entry point validation
Provide a strong definition for plat_sdei_validate_sdei_entrypoint()
which translates client address to Physical Address, and then validating
the address to be present in DRAM.
Change-Id: Ib93eb66b413d638aa5524d1b3de36aa16d38ea11
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>
Diffstat (limited to 'plat')
| -rw-r--r-- | plat/arm/common/arm_common.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/plat/arm/common/arm_common.c b/plat/arm/common/arm_common.c index 1905c0b05..bf6397377 100644 --- a/plat/arm/common/arm_common.c +++ b/plat/arm/common/arm_common.c @@ -204,3 +204,51 @@ unsigned int plat_get_syscnt_freq2(void) } #endif /* ARM_SYS_CNTCTL_BASE */ + +#if SDEI_SUPPORT +/* + * Translate SDEI entry point to PA, and perform standard ARM entry point + * validation on it. + */ +int plat_sdei_validate_entry_point(uintptr_t ep, unsigned int client_mode) +{ + uint64_t par, pa; + uint32_t scr_el3; + + /* Doing Non-secure address translation requires SCR_EL3.NS set */ + scr_el3 = read_scr_el3(); + write_scr_el3(scr_el3 | SCR_NS_BIT); + isb(); + + assert((client_mode == MODE_EL2) || (client_mode == MODE_EL1)); + if (client_mode == MODE_EL2) { + /* + * Translate entry point to Physical Address using the EL2 + * translation regime. + */ + ats1e2r(ep); + } else { + /* + * Translate entry point to Physical Address using the EL1&0 + * translation regime, including stage 2. + */ + ats12e1r(ep); + } + isb(); + par = read_par_el1(); + + /* Restore original SCRL_EL3 */ + write_scr_el3(scr_el3); + isb(); + + /* If the translation resulted in fault, return failure */ + if ((par & PAR_F_MASK) != 0) + return -1; + + /* Extract Physical Address from PAR */ + pa = (par & (PAR_ADDR_MASK << PAR_ADDR_SHIFT)); + + /* Perform NS entry point validation on the physical address */ + return arm_validate_ns_entrypoint(pa); +} +#endif |