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stm32mp1: set XN attribute for some areas in BL2

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DTB and BL32 area should not be set as executable in MMU during BL2
execution, hence set those areas as MT_RO_DATA.

Change-Id: I87c47a1e7fda761e541ec98a5b294588384d31db
Signed-off-by: Yann Gautier <yann.gautier@st.com>
This commit is contained in:
Yann Gautier 2019-12-17 17:11:10 +01:00
parent 84686ba347
commit 9c52e69fb4
1 changed files with 2 additions and 2 deletions
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4
plat/st/stm32mp1/bl2_plat_setup.c
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@ -190,12 +190,12 @@ void bl2_el3_plat_arch_setup(void)
/* Prevent corruption of preloaded BL32 */ /* Prevent corruption of preloaded BL32 */
mmap_add_region(BL32_BASE, BL32_BASE, mmap_add_region(BL32_BASE, BL32_BASE,
BL32_LIMIT - BL32_BASE, BL32_LIMIT - BL32_BASE,
MT_MEMORY | MT_RO | MT_SECURE); MT_RO_DATA | MT_SECURE);
#endif #endif
/* Prevent corruption of preloaded Device Tree */ /* Prevent corruption of preloaded Device Tree */
mmap_add_region(DTB_BASE, DTB_BASE, mmap_add_region(DTB_BASE, DTB_BASE,
DTB_LIMIT - DTB_BASE, DTB_LIMIT - DTB_BASE,
MT_MEMORY | MT_RO | MT_SECURE); MT_RO_DATA | MT_SECURE);
configure_mmu(); configure_mmu();