[PATCH v1 17/24] kvm: arm64: Add __hyp_pa_symbol helper macro
From: David Brazdil <hidden>
Date: 2020-11-09 11:33:34
Also in:
kvmarm, lkml
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
Add helper macro for computing the PA of a kernel symbol in nVHE hyp code. This will be useful for computing the PA of a PSCI CPU_ON entry point. Signed-off-by: David Brazdil <redacted> --- arch/arm64/kvm/hyp/nvhe/psci.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/arch/arm64/kvm/hyp/nvhe/psci.c b/arch/arm64/kvm/hyp/nvhe/psci.c
index b0b5df590ba5..7510b9e174e9 100644
--- a/arch/arm64/kvm/hyp/nvhe/psci.c
+++ b/arch/arm64/kvm/hyp/nvhe/psci.c@@ -20,6 +20,16 @@ s64 hyp_physvirt_offset; #define __hyp_pa(x) ((phys_addr_t)((x)) + hyp_physvirt_offset) +#define __hyp_pa_symbol(sym) \ + ({ \ + extern char sym[]; \ + unsigned long kern_va; \ + \ + asm volatile("ldr %0, =%1" : "=r" (kern_va) \ + : "S" (sym)); \ + kern_va - kimage_voffset; \ + }) + static u64 get_psci_func_id(struct kvm_cpu_context *host_ctxt) { return host_ctxt->regs.regs[0];
--
2.29.2.222.g5d2a92d10f8-goog
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