4 files changed, 93 insertions, 29 deletions

diff --git a/arch/riscv/include/asm/irq.h b/arch/riscv/include/asm/irq.h
index 8e10a94430a2..7e9a84a005ed 100644
--- a/arch/riscv/include/asm/irq.h
+++ b/arch/riscv/include/asm/irq.h
@@ -12,8 +12,63 @@
 
 #include <asm-generic/irq.h>
 
+#define INVALID_CONTEXT UINT_MAX
+
 void riscv_set_intc_hwnode_fn(struct fwnode_handle *(*fn)(void));
 
 struct fwnode_handle *riscv_get_intc_hwnode(void);
 
+#ifdef CONFIG_ACPI
+
+enum riscv_irqchip_type {
+	ACPI_RISCV_IRQCHIP_INTC		= 0x00,
+	ACPI_RISCV_IRQCHIP_IMSIC	= 0x01,
+	ACPI_RISCV_IRQCHIP_PLIC		= 0x02,
+	ACPI_RISCV_IRQCHIP_APLIC	= 0x03,
+};
+
+int riscv_acpi_get_gsi_info(struct fwnode_handle *fwnode, u32 *gsi_base,
+			    u32 *id, u32 *nr_irqs, u32 *nr_idcs);
+struct fwnode_handle *riscv_acpi_get_gsi_domain_id(u32 gsi);
+unsigned long acpi_rintc_index_to_hartid(u32 index);
+unsigned long acpi_rintc_ext_parent_to_hartid(unsigned int plic_id, unsigned int ctxt_idx);
+unsigned int acpi_rintc_get_plic_nr_contexts(unsigned int plic_id);
+unsigned int acpi_rintc_get_plic_context(unsigned int plic_id, unsigned int ctxt_idx);
+int __init acpi_rintc_get_imsic_mmio_info(u32 index, struct resource *res);
+
+#else
+static inline int riscv_acpi_get_gsi_info(struct fwnode_handle *fwnode, u32 *gsi_base,
+					  u32 *id, u32 *nr_irqs, u32 *nr_idcs)
+{
+	return 0;
+}
+
+static inline unsigned long acpi_rintc_index_to_hartid(u32 index)
+{
+	return INVALID_HARTID;
+}
+
+static inline unsigned long acpi_rintc_ext_parent_to_hartid(unsigned int plic_id,
+							    unsigned int ctxt_idx)
+{
+	return INVALID_HARTID;
+}
+
+static inline unsigned int acpi_rintc_get_plic_nr_contexts(unsigned int plic_id)
+{
+	return INVALID_CONTEXT;
+}
+
+static inline unsigned int acpi_rintc_get_plic_context(unsigned int plic_id, unsigned int ctxt_idx)
+{
+	return INVALID_CONTEXT;
+}
+
+static inline int __init acpi_rintc_get_imsic_mmio_info(u32 index, struct resource *res)
+{
+	return 0;
+}
+
+#endif /* CONFIG_ACPI */
+
 #endif /* _ASM_RISCV_IRQ_H */
diff --git a/arch/riscv/include/asm/kvm_vcpu_pmu.h b/arch/riscv/include/asm/kvm_vcpu_pmu.h
index fa0f535bbbf0..1d85b6617508 100644
--- a/arch/riscv/include/asm/kvm_vcpu_pmu.h
+++ b/arch/riscv/include/asm/kvm_vcpu_pmu.h
@@ -10,6 +10,7 @@
 #define __KVM_VCPU_RISCV_PMU_H
 
 #include <linux/perf/riscv_pmu.h>
+#include <asm/kvm_vcpu_insn.h>
 #include <asm/sbi.h>
 
 #ifdef CONFIG_RISCV_PMU_SBI
@@ -64,11 +65,11 @@ struct kvm_pmu {
 
 #if defined(CONFIG_32BIT)
 #define KVM_RISCV_VCPU_HPMCOUNTER_CSR_FUNCS \
-{.base = CSR_CYCLEH,	.count = 31,	.func = kvm_riscv_vcpu_pmu_read_hpm }, \
-{.base = CSR_CYCLE,	.count = 31,	.func = kvm_riscv_vcpu_pmu_read_hpm },
+{.base = CSR_CYCLEH,	.count = 32,	.func = kvm_riscv_vcpu_pmu_read_hpm }, \
+{.base = CSR_CYCLE,	.count = 32,	.func = kvm_riscv_vcpu_pmu_read_hpm },
 #else
 #define KVM_RISCV_VCPU_HPMCOUNTER_CSR_FUNCS \
-{.base = CSR_CYCLE,	.count = 31,	.func = kvm_riscv_vcpu_pmu_read_hpm },
+{.base = CSR_CYCLE,	.count = 32,	.func = kvm_riscv_vcpu_pmu_read_hpm },
 #endif
 
 int kvm_riscv_vcpu_pmu_incr_fw(struct kvm_vcpu *vcpu, unsigned long fid);
@@ -104,8 +105,20 @@ void kvm_riscv_vcpu_pmu_reset(struct kvm_vcpu *vcpu);
 struct kvm_pmu {
 };
 
+static inline int kvm_riscv_vcpu_pmu_read_legacy(struct kvm_vcpu *vcpu, unsigned int csr_num,
+						 unsigned long *val, unsigned long new_val,
+						 unsigned long wr_mask)
+{
+	if (csr_num == CSR_CYCLE || csr_num == CSR_INSTRET) {
+		*val = 0;
+		return KVM_INSN_CONTINUE_NEXT_SEPC;
+	} else {
+		return KVM_INSN_ILLEGAL_TRAP;
+	}
+}
+
 #define KVM_RISCV_VCPU_HPMCOUNTER_CSR_FUNCS \
-{.base = 0,	.count = 0,	.func = NULL },
+{.base = CSR_CYCLE,	.count = 3,	.func = kvm_riscv_vcpu_pmu_read_legacy },
 
 static inline void kvm_riscv_vcpu_pmu_init(struct kvm_vcpu *vcpu) {}
 static inline int kvm_riscv_vcpu_pmu_incr_fw(struct kvm_vcpu *vcpu, unsigned long fid)
diff --git a/arch/riscv/include/asm/processor.h b/arch/riscv/include/asm/processor.h
index 8702b8721a27..efa1b3519b23 100644
--- a/arch/riscv/include/asm/processor.h
+++ b/arch/riscv/include/asm/processor.h
@@ -14,36 +14,14 @@
 
 #include <asm/ptrace.h>
 
-/*
- * addr is a hint to the maximum userspace address that mmap should provide, so
- * this macro needs to return the largest address space available so that
- * mmap_end < addr, being mmap_end the top of that address space.
- * See Documentation/arch/riscv/vm-layout.rst for more details.
- */
 #define arch_get_mmap_end(addr, len, flags)			\
 ({								\
-	unsigned long mmap_end;					\
-	typeof(addr) _addr = (addr);				\
-	if ((_addr) == 0 || is_compat_task() ||			\
-	    ((_addr + len) > BIT(VA_BITS - 1)))			\
-		mmap_end = STACK_TOP_MAX;			\
-	else							\
-		mmap_end = (_addr + len);			\
-	mmap_end;						\
+	STACK_TOP_MAX;						\
 })
 
 #define arch_get_mmap_base(addr, base)				\
 ({								\
-	unsigned long mmap_base;				\
-	typeof(addr) _addr = (addr);				\
-	typeof(base) _base = (base);				\
-	unsigned long rnd_gap = DEFAULT_MAP_WINDOW - (_base);	\
-	if ((_addr) == 0 || is_compat_task() || 		\
-	    ((_addr + len) > BIT(VA_BITS - 1)))			\
-		mmap_base = (_base);				\
-	else							\
-		mmap_base = (_addr + len) - rnd_gap;		\
-	mmap_base;						\
+	base;							\
 })
 
 #ifdef CONFIG_64BIT
diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
index 7cffd4ffecd0..7bd3746028c9 100644
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -9,6 +9,7 @@
 
 #include <linux/types.h>
 #include <linux/cpumask.h>
+#include <linux/jump_label.h>
 
 #ifdef CONFIG_RISCV_SBI
 enum sbi_ext_id {
@@ -304,6 +305,7 @@ struct sbiret {
 };
 
 void sbi_init(void);
+long __sbi_base_ecall(int fid);
 struct sbiret __sbi_ecall(unsigned long arg0, unsigned long arg1,
 			  unsigned long arg2, unsigned long arg3,
 			  unsigned long arg4, unsigned long arg5,
@@ -373,7 +375,23 @@ static inline unsigned long sbi_mk_version(unsigned long major,
 		| (minor & SBI_SPEC_VERSION_MINOR_MASK);
 }
 
-int sbi_err_map_linux_errno(int err);
+static inline int sbi_err_map_linux_errno(int err)
+{
+	switch (err) {
+	case SBI_SUCCESS:
+		return 0;
+	case SBI_ERR_DENIED:
+		return -EPERM;
+	case SBI_ERR_INVALID_PARAM:
+		return -EINVAL;
+	case SBI_ERR_INVALID_ADDRESS:
+		return -EFAULT;
+	case SBI_ERR_NOT_SUPPORTED:
+	case SBI_ERR_FAILURE:
+	default:
+		return -ENOTSUPP;
+	};
+}
 
 extern bool sbi_debug_console_available;
 int sbi_debug_console_write(const char *bytes, unsigned int num_bytes);