diff options
| author | Joey Gouly <joey.gouly@arm.com> | 2024-08-22 18:10:47 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2024-09-04 14:47:10 +0300 |
| commit | 878c05e8ef846bd1e402ba662d12e575a073e070 (patch) | |
| tree | a6b24400572fb56a5c6835039eb571f8cac4283c | |
| parent | cf19cc576444b0f912d924c6abc32df8511c6f54 (diff) | |
| download | linux-878c05e8ef846bd1e402ba662d12e575a073e070.tar.xz | |
arm64: disable trapping of POR_EL0 to EL2
Allow EL0 or EL1 to access POR_EL0 without being trapped to EL2.
Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/20240822151113.1479789-5-joey.gouly@arm.com
[will: Rename Lset_poe_fgt to Lskip_pie_fgt to ease merge with for-next/misc]
Signed-off-by: Will Deacon <will@kernel.org>
| -rw-r--r-- | arch/arm64/include/asm/el2_setup.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/el2_setup.h b/arch/arm64/include/asm/el2_setup.h index fd87c4b8f984..1173aba9c6a8 100644 --- a/arch/arm64/include/asm/el2_setup.h +++ b/arch/arm64/include/asm/el2_setup.h @@ -185,12 +185,20 @@ .Lset_pie_fgt_\@: mrs_s x1, SYS_ID_AA64MMFR3_EL1 ubfx x1, x1, #ID_AA64MMFR3_EL1_S1PIE_SHIFT, #4 - cbz x1, .Lset_fgt_\@ + cbz x1, .Lskip_pie_fgt_\@ /* Disable trapping of PIR_EL1 / PIRE0_EL1 */ orr x0, x0, #HFGxTR_EL2_nPIR_EL1 orr x0, x0, #HFGxTR_EL2_nPIRE0_EL1 +.Lskip_pie_fgt_\@: + mrs_s x1, SYS_ID_AA64MMFR3_EL1 + ubfx x1, x1, #ID_AA64MMFR3_EL1_S1POE_SHIFT, #4 + cbz x1, .Lset_fgt_\@ + + /* Disable trapping of POR_EL0 */ + orr x0, x0, #HFGxTR_EL2_nPOR_EL0 + .Lset_fgt_\@: msr_s SYS_HFGRTR_EL2, x0 msr_s SYS_HFGWTR_EL2, x0 |