[xen staging] xen/riscv: add required things to current.h

[patchbot@xxxxxxx]

commit e6ed98863bc79728e5aa759d51f21c90187e2519
Author:     Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
AuthorDate: Fri May 17 15:54:58 2024 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu May 23 10:12:52 2024 +0200

    xen/riscv: add required things to current.h
    
    Add minimal requied things to be able to build full Xen.
    
    Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/riscv/include/asm/current.h | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/xen/arch/riscv/include/asm/current.h 
b/xen/arch/riscv/include/asm/current.h
index d84f15dc50..aedb6dc732 100644
--- a/xen/arch/riscv/include/asm/current.h
+++ b/xen/arch/riscv/include/asm/current.h
@@ -3,6 +3,21 @@
 #ifndef __ASM_CURRENT_H
 #define __ASM_CURRENT_H
 
+#include <xen/lib.h>
+#include <xen/percpu.h>
+#include <asm/processor.h>
+
+#ifndef __ASSEMBLY__
+
+/* Which VCPU is "current" on this PCPU. */
+DECLARE_PER_CPU(struct vcpu *, curr_vcpu);
+
+#define current            this_cpu(curr_vcpu)
+#define set_current(vcpu)  do { current = (vcpu); } while (0)
+#define get_cpu_current(cpu)  per_cpu(curr_vcpu, cpu)
+
+#define guest_cpu_user_regs() ({ BUG_ON("unimplemented"); NULL; })
+
 #define switch_stack_and_jump(stack, fn) do {               \
     asm volatile (                                          \
             "mv sp, %0\n"                                   \
@@ -10,4 +25,8 @@
     unreachable();                                          \
 } while ( false )
 
+#define get_per_cpu_offset() __per_cpu_offset[smp_processor_id()]
+
+#endif /* __ASSEMBLY__ */
+
 #endif /* __ASM_CURRENT_H */
--
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