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| author | Nicholas Piggin <npiggin@gmail.com> | 2019-02-26 09:51:07 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-02-26 13:28:24 +0100 |
| commit | ccd477028a202993b9ddca5d2404fdaca3b7a55c (patch) | |
| tree | 075f65a46de61f8f45856cd0bf8fa71e85b9262c /arch/powerpc/kernel/exceptions-64s.S | |
| parent | powerpc/mm/hash: Handle mmap_min_addr correctly in get_unmapped_area topdown ... (diff) | |
| download | linux-ccd477028a202993b9ddca5d2404fdaca3b7a55c.tar.xz linux-ccd477028a202993b9ddca5d2404fdaca3b7a55c.zip | |
powerpc/64s: Fix HV NMI vs HV interrupt recoverability test
HV interrupts that use HSRR registers do not enter with MSR[RI] clear,
but their entry code is not recoverable vs NMI, due to shared use of
HSPRG1 as a scratch register to save r13.
This means that a system reset or machine check that hits in HSRR
interrupt entry can cause r13 to be silently corrupted.
Fix this by marking NMIs non-recoverable if they land in HV interrupt
ranges.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/exceptions-64s.S')
| -rw-r--r-- | arch/powerpc/kernel/exceptions-64s.S | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index b179b8b5d3f0..76442af8c191 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -68,6 +68,14 @@ OPEN_FIXED_SECTION(real_vectors, 0x0100, 0x1900) OPEN_FIXED_SECTION(real_trampolines, 0x1900, 0x4000) OPEN_FIXED_SECTION(virt_vectors, 0x4000, 0x5900) OPEN_FIXED_SECTION(virt_trampolines, 0x5900, 0x7000) + +#ifdef CONFIG_PPC_POWERNV + .globl real_trampolines_start + .globl real_trampolines_end + .globl virt_trampolines_start + .globl virt_trampolines_end +#endif + #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) /* * Data area reserved for FWNMI option. |