cxl: Isolate a few bare-metal-specific calls
A few functions are mostly common between bare-metal and guest and
just need minor tuning. To avoid crowding the backend API, introduce a
few 'if' based on the CPU being in HV mode.
Co-authored-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Reviewed-by: Manoj Kumar <manoj@linux.vnet.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/drivers/misc/cxl/fault.c b/drivers/misc/cxl/fault.c
index ab740a1..9a8650b 100644
--- a/drivers/misc/cxl/fault.c
+++ b/drivers/misc/cxl/fault.c
@@ -254,14 +254,17 @@
u64 dar = ctx->dar;
struct mm_struct *mm = NULL;
- if (cxl_p2n_read(ctx->afu, CXL_PSL_DSISR_An) != dsisr ||
- cxl_p2n_read(ctx->afu, CXL_PSL_DAR_An) != dar ||
- cxl_p2n_read(ctx->afu, CXL_PSL_PEHandle_An) != ctx->pe) {
- /* Most likely explanation is harmless - a dedicated process
- * has detached and these were cleared by the PSL purge, but
- * warn about it just in case */
- dev_notice(&ctx->afu->dev, "cxl_handle_fault: Translation fault regs changed\n");
- return;
+ if (cpu_has_feature(CPU_FTR_HVMODE)) {
+ if (cxl_p2n_read(ctx->afu, CXL_PSL_DSISR_An) != dsisr ||
+ cxl_p2n_read(ctx->afu, CXL_PSL_DAR_An) != dar ||
+ cxl_p2n_read(ctx->afu, CXL_PSL_PEHandle_An) != ctx->pe) {
+ /* Most likely explanation is harmless - a dedicated
+ * process has detached and these were cleared by the
+ * PSL purge, but warn about it just in case
+ */
+ dev_notice(&ctx->afu->dev, "cxl_handle_fault: Translation fault regs changed\n");
+ return;
+ }
}
/* Early return if the context is being / has been detached */