diff options
| author | Frederic Barrat <fbarrat@linux.vnet.ibm.com> | 2016-03-04 12:26:30 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-03-09 13:05:47 +1100 |
| commit | ea2d1f95efd7c100617235918bac370414aec1ad (patch) | |
| tree | 5382eaa83971ba74c3f28e7d0900c7cf0b7b7b01 /drivers/misc/cxl/fault.c | |
| parent | 2b04cf310ba8c123e9957cfab80274e7606bf53c (diff) | |
| download | op-kernel-dev-ea2d1f95efd7c100617235918bac370414aec1ad.zip op-kernel-dev-ea2d1f95efd7c100617235918bac370414aec1ad.tar.gz | |
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>
Diffstat (limited to 'drivers/misc/cxl/fault.c')
| -rw-r--r-- | drivers/misc/cxl/fault.c | 19 |
1 files changed, 11 insertions, 8 deletions
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 @@ void cxl_handle_fault(struct work_struct *fault_work) 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 */ |
