diff options
| author | Pasha Tatashin <pasha.tatashin@soleen.com> | 2021-09-30 14:31:06 +0000 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-10-01 13:31:00 +0100 |
| commit | 08eae0ef618f34a813c1478200eb351d4416f3ca (patch) | |
| tree | 4eb94a53d81e78034e7f9a82708f8aa723c5a866 /arch/arm64/mm | |
| parent | 878fdbd704864352b9b11e29805e92ffa182904e (diff) | |
| download | linux-08eae0ef618f34a813c1478200eb351d4416f3ca.tar.bz2 | |
arm64: kexec: configure EL2 vectors for kexec
If we have a EL2 mode without VHE, the EL2 vectors are needed in order
to switch to EL2 and jump to new world with hypervisor privileges.
In preparation to MMU enabled relocation, configure our EL2 table now.
Kexec uses #HVC_SOFT_RESTART to branch to the new world, so extend
el1_sync vector that is provided by trans_pgd_copy_el2_vectors() to
support this case.
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20210930143113.1502553-9-pasha.tatashin@soleen.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/mm')
| -rw-r--r-- | arch/arm64/mm/trans_pgd-asm.S | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/arm64/mm/trans_pgd-asm.S b/arch/arm64/mm/trans_pgd-asm.S index 8c4bffe3089d..021c31573bcb 100644 --- a/arch/arm64/mm/trans_pgd-asm.S +++ b/arch/arm64/mm/trans_pgd-asm.S @@ -24,7 +24,14 @@ SYM_CODE_START_LOCAL(el1_sync) msr vbar_el2, x1 mov x0, xzr eret -1: /* Unexpected argument, set an error */ +1: cmp x0, #HVC_SOFT_RESTART /* Called from kexec */ + b.ne 2f + mov x0, x2 + mov x2, x4 + mov x4, x1 + mov x1, x3 + br x4 +2: /* Unexpected argument, set an error */ mov_q x0, HVC_STUB_ERR eret SYM_CODE_END(el1_sync) |