diff options
| author | David Brazdil <dbrazdil@google.com> | 2020-12-02 18:41:09 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-12-04 10:08:34 +0000 |
| commit | 687413d34d4aa72103de3e545f431f480dd21d7f (patch) | |
| tree | 5c5c5f2bc574130b660bcfde236eb85bf1aa5184 /arch/arm64/include/asm/percpu.h | |
| parent | 2d7bf218ca739554bf7277ab0dbfa5399d01f7c6 (diff) | |
KVM: arm64: Support per_cpu_ptr in nVHE hyp code
When compiling with __KVM_NVHE_HYPERVISOR__, redefine per_cpu_offset()
to __hyp_per_cpu_offset() which looks up the base of the nVHE per-CPU
region of the given cpu and computes its offset from the
.hyp.data..percpu section.
This enables use of per_cpu_ptr() helpers in nVHE hyp code. Until now
only this_cpu_ptr() was supported by setting TPIDR_EL2.
Signed-off-by: David Brazdil <dbrazdil@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20201202184122.26046-14-dbrazdil@google.com
Diffstat (limited to 'arch/arm64/include/asm/percpu.h')
| -rw-r--r-- | arch/arm64/include/asm/percpu.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/percpu.h b/arch/arm64/include/asm/percpu.h index 1599e17379d8..8f1661603b78 100644 --- a/arch/arm64/include/asm/percpu.h +++ b/arch/arm64/include/asm/percpu.h @@ -239,6 +239,12 @@ PERCPU_RET_OP(add, add, ldadd) #define this_cpu_cmpxchg_8(pcp, o, n) \ _pcp_protect_return(cmpxchg_relaxed, pcp, o, n) +#ifdef __KVM_NVHE_HYPERVISOR__ +extern unsigned long __hyp_per_cpu_offset(unsigned int cpu); +#define __per_cpu_offset +#define per_cpu_offset(cpu) __hyp_per_cpu_offset((cpu)) +#endif + #include <asm-generic/percpu.h> /* Redefine macros for nVHE hyp under DEBUG_PREEMPT to avoid its dependencies. */ |