From: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
To: imunsie@au1.ibm.com, michael.neuling@au1.ibm.com,
mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v4 06/18] cxl: Isolate a few bare-metal-specific calls
Date: Tue, 16 Feb 2016 22:38:59 +0100 [thread overview]
Message-ID: <1455658751-16970-7-git-send-email-fbarrat@linux.vnet.ibm.com> (raw)
In-Reply-To: <1455658751-16970-1-git-send-email-fbarrat@linux.vnet.ibm.com>
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>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
---
drivers/misc/cxl/context.c | 3 ++-
drivers/misc/cxl/cxl.h | 7 +++++--
drivers/misc/cxl/debugfs.c | 4 ++++
drivers/misc/cxl/fault.c | 19 +++++++++++--------
4 files changed, 22 insertions(+), 11 deletions(-)
diff --git a/drivers/misc/cxl/context.c b/drivers/misc/cxl/context.c
index aa65262..46f9844 100644
--- a/drivers/misc/cxl/context.c
+++ b/drivers/misc/cxl/context.c
@@ -95,7 +95,8 @@ int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master,
return i;
ctx->pe = i;
- ctx->elem = &ctx->afu->spa[i];
+ if (cpu_has_feature(CPU_FTR_HVMODE))
+ ctx->elem = &ctx->afu->spa[i];
ctx->pe_inserted = false;
/*
diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h
index 02065b4..40f6783 100644
--- a/drivers/misc/cxl/cxl.h
+++ b/drivers/misc/cxl/cxl.h
@@ -560,8 +560,11 @@ static inline bool cxl_adapter_link_ok(struct cxl *cxl)
{
struct pci_dev *pdev;
- pdev = to_pci_dev(cxl->dev.parent);
- return !pci_channel_offline(pdev);
+ if (cpu_has_feature(CPU_FTR_HVMODE)) {
+ pdev = to_pci_dev(cxl->dev.parent);
+ return !pci_channel_offline(pdev);
+ }
+ return true;
}
static inline void __iomem *_cxl_p1_addr(struct cxl *cxl, cxl_p1_reg_t reg)
diff --git a/drivers/misc/cxl/debugfs.c b/drivers/misc/cxl/debugfs.c
index 18df6f4..5751899 100644
--- a/drivers/misc/cxl/debugfs.c
+++ b/drivers/misc/cxl/debugfs.c
@@ -118,6 +118,10 @@ void cxl_debugfs_afu_remove(struct cxl_afu *afu)
int __init cxl_debugfs_init(void)
{
struct dentry *ent;
+
+ if (!cpu_has_feature(CPU_FTR_HVMODE))
+ return 0;
+
ent = debugfs_create_dir("cxl", NULL);
if (IS_ERR(ent))
return PTR_ERR(ent);
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 */
--
1.9.1
next prev parent reply other threads:[~2016-02-16 21:39 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-16 21:38 [PATCH v4 00/18] cxl: Add support for powerVM guest Frederic Barrat
2016-02-16 21:38 ` [PATCH v4 01/18] cxl: Move common code away from bare-metal-specific files Frederic Barrat
[not found] ` <56CA2C74.7050504@linux.vnet.ibm.com>
2016-02-21 21:38 ` Fwd: " Manoj Kumar
2016-02-16 21:38 ` [PATCH v4 02/18] cxl: Move bare-metal specific code to specialized files Frederic Barrat
[not found] ` <56CA2C7C.40803@linux.vnet.ibm.com>
2016-02-21 21:44 ` Fwd: " Manoj Kumar
2016-02-22 18:13 ` Frederic Barrat
2016-02-16 21:38 ` [PATCH v4 03/18] cxl: Define process problem state area at attach time only Frederic Barrat
[not found] ` <56CA2C87.7040905@linux.vnet.ibm.com>
2016-02-21 21:45 ` Fwd: " Manoj Kumar
2016-02-16 21:38 ` [PATCH v4 04/18] cxl: Introduce implementation-specific API Frederic Barrat
[not found] ` <56CA2C8F.4030800@linux.vnet.ibm.com>
2016-02-21 22:00 ` Fwd: " Manoj Kumar
2016-02-16 21:38 ` [PATCH v4 05/18] cxl: Rename some bare-metal specific functions Frederic Barrat
[not found] ` <56CA2C97.8000906@linux.vnet.ibm.com>
2016-02-21 22:02 ` Fwd: " Manoj Kumar
2016-02-16 21:38 ` Frederic Barrat [this message]
[not found] ` <56CA2C9F.8010903@linux.vnet.ibm.com>
2016-02-21 22:13 ` Fwd: [PATCH v4 06/18] cxl: Isolate a few bare-metal-specific calls Manoj Kumar
2016-02-16 21:39 ` [PATCH v4 07/18] cxl: Update cxl_irq() prototype Frederic Barrat
[not found] ` <56CA2CA8.2020402@linux.vnet.ibm.com>
2016-02-21 22:15 ` Fwd: " Manoj Kumar
2016-02-16 21:39 ` [PATCH v4 08/18] cxl: IRQ allocation for guests Frederic Barrat
[not found] ` <56CA2CB1.5030105@linux.vnet.ibm.com>
2016-02-21 22:30 ` Fwd: " Manoj Kumar
2016-02-22 14:46 ` Frederic Barrat
2016-02-22 19:02 ` Manoj Kumar
2016-02-16 21:39 ` [PATCH v4 09/18] cxl: New possible return value from hcall Frederic Barrat
[not found] ` <56CA2CBD.4070907@linux.vnet.ibm.com>
2016-02-21 22:50 ` Fwd: " Manoj Kumar
2016-02-16 21:39 ` [PATCH v4 10/18] cxl: New hcalls to support CAPI adapters Frederic Barrat
[not found] ` <56CA2CC6.9010802@linux.vnet.ibm.com>
2016-02-21 23:22 ` Fwd: " Manoj Kumar
2016-02-22 18:14 ` Frederic Barrat
2016-02-22 19:46 ` Manoj Kumar
2016-02-16 21:39 ` [PATCH v4 11/18] cxl: Separate bare-metal fields in adapter and AFU data structures Frederic Barrat
[not found] ` <56CA2CD1.7020908@linux.vnet.ibm.com>
2016-02-22 1:14 ` Fwd: " Manoj Kumar
2016-02-22 17:57 ` Frederic Barrat
2016-02-22 18:53 ` Manoj Kumar
2016-02-16 21:39 ` [PATCH v4 12/18] cxl: Add guest-specific code Frederic Barrat
[not found] ` <56CA2CDA.90102@linux.vnet.ibm.com>
2016-02-22 1:29 ` Fwd: " Manoj Kumar
2016-02-22 18:10 ` Frederic Barrat
2016-02-16 21:39 ` [PATCH v4 13/18] cxl: sysfs support for guests Frederic Barrat
2016-02-16 21:39 ` [PATCH v4 14/18] cxl: Support to flash a new image on the adapter from a guest Frederic Barrat
2016-02-16 21:39 ` [PATCH v4 15/18] cxl: Parse device tree and create CAPI device(s) at boot Frederic Barrat
2016-02-16 21:39 ` [PATCH v4 16/18] cxl: Support the cxl kernel API from a guest Frederic Barrat
2016-02-16 21:39 ` [PATCH v4 17/18] cxl: Adapter failure handling Frederic Barrat
2016-02-16 21:39 ` [PATCH v4 18/18] cxl: Add tracepoints around the CAPI hcall Frederic Barrat
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