From 9efd6e5cf3c8409a4ac7ad8fdfdb4393654d4f8a Mon Sep 17 00:00:00 2001 From: Antonio Nino Diaz Date: Tue, 14 Nov 2017 13:41:27 +0000 Subject: [PATCH] SPM: Fix calculation of max page granularity The code was incorrectly reading from ID_AA64PRF0_EL1 instead of ID_AA64MMFR0_EL1 causing the supported granularity sizes returned by the code to be wrong. This wasn't causing any problem because it's just used to check the alignment of the base of the buffer shared between Non-secure and Secure worlds, and it was aligned to more than 64 KiB, which is the maximum granularity supported by the architecture. Change-Id: Icc0d949d9521cc0ef13afb753825c475ea62d462 Signed-off-by: Antonio Nino Diaz --- services/std_svc/spm/secure_partition_setup.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/services/std_svc/spm/secure_partition_setup.c b/services/std_svc/spm/secure_partition_setup.c index 67301608..6f4b0571 100644 --- a/services/std_svc/spm/secure_partition_setup.c +++ b/services/std_svc/spm/secure_partition_setup.c @@ -92,20 +92,20 @@ void secure_partition_setup(void) /* Get max granularity supported by the platform. */ - u_register_t id_aa64prf0_el1 = read_id_aa64pfr0_el1(); + u_register_t id_aa64mmfr0_el1 = read_id_aa64mmfr0_el1(); int tgran64_supported = - ((id_aa64prf0_el1 >> ID_AA64MMFR0_EL1_TGRAN64_SHIFT) & + ((id_aa64mmfr0_el1 >> ID_AA64MMFR0_EL1_TGRAN64_SHIFT) & ID_AA64MMFR0_EL1_TGRAN64_MASK) == ID_AA64MMFR0_EL1_TGRAN64_SUPPORTED; int tgran16_supported = - ((id_aa64prf0_el1 >> ID_AA64MMFR0_EL1_TGRAN16_SHIFT) & + ((id_aa64mmfr0_el1 >> ID_AA64MMFR0_EL1_TGRAN16_SHIFT) & ID_AA64MMFR0_EL1_TGRAN16_MASK) == ID_AA64MMFR0_EL1_TGRAN16_SUPPORTED; int tgran4_supported = - ((id_aa64prf0_el1 >> ID_AA64MMFR0_EL1_TGRAN4_SHIFT) & + ((id_aa64mmfr0_el1 >> ID_AA64MMFR0_EL1_TGRAN4_SHIFT) & ID_AA64MMFR0_EL1_TGRAN4_MASK) == ID_AA64MMFR0_EL1_TGRAN4_SUPPORTED; @@ -121,7 +121,7 @@ void secure_partition_setup(void) } VERBOSE("Max translation granule supported: %lu KiB\n", - max_granule_size); + max_granule_size / 1024); uintptr_t max_granule_size_mask = max_granule_size - 1; -- 2.30.2