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Diffstat (limited to 'Documentation/arm64/booting.rst')
| -rw-r--r-- | Documentation/arm64/booting.rst | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/Documentation/arm64/booting.rst b/Documentation/arm64/booting.rst index 8aefa1001ae5..96fe10ec6c24 100644 --- a/Documentation/arm64/booting.rst +++ b/Documentation/arm64/booting.rst @@ -121,8 +121,9 @@ Header notes: to the base of DRAM, since memory below it is not accessible via the linear mapping 1 - 2MB aligned base may be anywhere in physical - memory + 2MB aligned base such that all image_size bytes + counted from the start of the image are within + the 48-bit addressable range of physical memory Bits 4-63 Reserved. ============= =============================================================== @@ -340,7 +341,15 @@ Before jumping into the kernel, the following conditions must be met: - SMCR_EL2.LEN must be initialised to the same value for all CPUs the kernel will execute on. - For CPUs with the Scalable Matrix Extension FA64 feature (FEAT_SME_FA64) + - HWFGRTR_EL2.nTPIDR2_EL0 (bit 55) must be initialised to 0b01. + + - HWFGWTR_EL2.nTPIDR2_EL0 (bit 55) must be initialised to 0b01. + + - HWFGRTR_EL2.nSMPRI_EL1 (bit 54) must be initialised to 0b01. + + - HWFGWTR_EL2.nSMPRI_EL1 (bit 54) must be initialised to 0b01. + + For CPUs with the Scalable Matrix Extension FA64 feature (FEAT_SME_FA64): - If EL3 is present: |