Instruct the remote harts to execute one or more HFENCE.GVMA instructions,
covering the range of guest physical addresses between start_addr and
start_addr + size for all VMIDs.
The remote fence operation applies to the entire address space if either:
- start_addr and size are both 0, or
- size is equal to 2^XLEN-1.
Signed-off-by: Oleksii Kurochko <oleksii.kuroc...@gmail.com>
---
Changes in V3:
- Update the comment message above declaration of sbi_remote_hfence_gvma()
and update the commit message in sync.
- Drop ASSERT() in sbi_remote_hfence_gvma().
---
xen/arch/riscv/include/asm/sbi.h | 19 +++++++++++++++++++
xen/arch/riscv/sbi.c | 7 +++++++
2 files changed, 26 insertions(+)
diff --git a/xen/arch/riscv/include/asm/sbi.h b/xen/arch/riscv/include/asm/sbi.h
index 527d773277..0277aab747 100644
--- a/xen/arch/riscv/include/asm/sbi.h
+++ b/xen/arch/riscv/include/asm/sbi.h
@@ -89,6 +89,25 @@ bool sbi_has_rfence(void);
int sbi_remote_sfence_vma(const cpumask_t *cpu_mask, vaddr_t start,
size_t size);
+/*
+ * Instructs the remote harts to execute one or more HFENCE.GVMA
+ * instructions, covering the range of guest physical addresses
+ * between start_addr and start_addr + size for all VMIDs.
+ *
+ * Returns 0 if IPI was sent to all the targeted harts successfully
+ * or negative value if start_addr or size is not valid.
+ *
+ * The remote fence operation applies to the entire address space if either:
+ * - start_addr and size are both 0, or
+ * - size is equal to 2^XLEN-1.
+ *
+ * @cpu_mask a cpu mask containing all the target CPUs (in Xen space).
+ * @param start virtual address start
+ * @param size virtual address range size
+ */
+int sbi_remote_hfence_gvma(const cpumask_t *cpu_mask, vaddr_t start,
+ size_t size);
+
/*
* Initialize SBI library
*
diff --git a/xen/arch/riscv/sbi.c b/xen/arch/riscv/sbi.c
index 4209520389..1809f614c5 100644
--- a/xen/arch/riscv/sbi.c
+++ b/xen/arch/riscv/sbi.c
@@ -258,6 +258,13 @@ int sbi_remote_sfence_vma(const cpumask_t *cpu_mask,
vaddr_t start,
cpu_mask, start, size, 0, 0);
}
+int sbi_remote_hfence_gvma(const cpumask_t *cpu_mask, vaddr_t start,
+ size_t size)
+{
+ return sbi_rfence(SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA,
+ cpu_mask, start, size, 0, 0);
+}
+
/* This function must always succeed. */
#define sbi_get_spec_version() \
sbi_ext_base_func(SBI_EXT_BASE_GET_SPEC_VERSION)
--
2.50.1
