From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au
Cc: linuxppc-dev@lists.ozlabs.org,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: [PATCH for-4.8 02/12] powerpc/mm/radix: Update LPCR HR bit as per ISA
Date: Wed, 13 Jul 2016 15:05:21 +0530 [thread overview]
Message-ID: <1468402531-4914-3-git-send-email-aneesh.kumar@linux.vnet.ibm.com> (raw)
In-Reply-To: <1468402531-4914-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
PowerISA 3.0 requires the MMU mode (radix vs. hash) of the hypervisor
to be mirrored in the LPCR register, in addition to the partition table.
This is done to avoid fetching from the table when deciding, among other
things, how to perform transitions to HV mode on some interrupts.
So let's set it up appropriately
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
arch/powerpc/include/asm/reg.h | 1 +
arch/powerpc/mm/pgtable-radix.c | 4 ++--
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index 320136f5fe28..a5ba263e0353 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -354,6 +354,7 @@
#define LPCR_RMI 0x00000002 /* real mode is cache inhibit */
#define LPCR_HDICE 0x00000001 /* Hyp Decr enable (HV,PR,EE) */
#define LPCR_UPRT 0x00400000 /* Use Process Table (ISA 3) */
+#define LPCR_HR 0x00100000
#ifndef SPRN_LPID
#define SPRN_LPID 0x13F /* Logical Partition Identifier */
#endif
diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c
index e58707deef5c..f8a3bec315f7 100644
--- a/arch/powerpc/mm/pgtable-radix.c
+++ b/arch/powerpc/mm/pgtable-radix.c
@@ -337,7 +337,7 @@ void __init radix__early_init_mmu(void)
radix_init_page_sizes();
if (!firmware_has_feature(FW_FEATURE_LPAR)) {
lpcr = mfspr(SPRN_LPCR);
- mtspr(SPRN_LPCR, lpcr | LPCR_UPRT);
+ mtspr(SPRN_LPCR, lpcr | LPCR_UPRT | LPCR_HR);
radix_init_partition_table();
}
@@ -352,7 +352,7 @@ void radix__early_init_mmu_secondary(void)
*/
if (!firmware_has_feature(FW_FEATURE_LPAR)) {
lpcr = mfspr(SPRN_LPCR);
- mtspr(SPRN_LPCR, lpcr | LPCR_UPRT);
+ mtspr(SPRN_LPCR, lpcr | LPCR_UPRT | LPCR_HR);
mtspr(SPRN_PTCR,
__pa(partition_tb) | (PATB_SIZE_SHIFT - 12));
--
2.7.4
next prev parent reply other threads:[~2016-07-13 9:35 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-13 9:35 [PATCH for-4.8_set1 00/12] Radix fixes for 4.8 Aneesh Kumar K.V
2016-07-13 9:35 ` [PATCH for-4.8 01/12] Fix .long's in mm/tlb-radix.c to more meaningful Aneesh Kumar K.V
2016-07-17 10:28 ` [for-4.8,01/12] " Michael Ellerman
2016-07-13 9:35 ` Aneesh Kumar K.V [this message]
2016-07-14 3:30 ` [PATCH for-4.8 02/12] powerpc/mm/radix: Update LPCR HR bit as per ISA Balbir Singh
2016-07-13 9:35 ` [PATCH for-4.8 03/12] powerpc/mm: use _raw variant of page table accessors Aneesh Kumar K.V
2016-07-14 3:42 ` Balbir Singh
2016-07-15 11:42 ` David Laight
2016-07-17 5:22 ` Anton Blanchard
2016-07-13 9:35 ` [PATCH for-4.8 04/12] powerpc/mm: Compile out radix related functions if RADIX_MMU is disabled Aneesh Kumar K.V
2016-07-13 9:35 ` [PATCH for-4.8 05/12] powerpc/mm: Clear top 16 bits of va only on older cpus Aneesh Kumar K.V
2016-07-14 3:50 ` Balbir Singh
2016-07-13 9:35 ` [PATCH for-4.8 06/12] powerpc/mm: Print formation regarding the the MMU mode Aneesh Kumar K.V
2016-07-14 4:03 ` Balbir Singh
2016-07-13 9:35 ` [PATCH for-4.8 07/12] powerpc/mm/hash: Update SDR1 size encoding as documented in ISA 3.0 Aneesh Kumar K.V
2016-07-14 4:29 ` Balbir Singh
2016-07-13 9:35 ` [PATCH for-4.8 08/12] powerpc/mm/radix: Update PID switch sequence Aneesh Kumar K.V
2016-07-13 9:35 ` [PATCH for-4.8 09/12] powerpc/mm/radix: Update machine call back to support new HCALL Aneesh Kumar K.V
2016-07-13 9:35 ` [PATCH for-4.8 10/12] powerpc/mm/radix: Add LPID based tlb flush helpers Aneesh Kumar K.V
2016-07-14 5:12 ` Balbir Singh
2016-07-13 9:35 ` [PATCH for-4.8 11/12] powerpc/mm: Cleanup LPCR defines Aneesh Kumar K.V
2016-07-13 9:35 ` [PATCH for-4.8 12/12] powerpc/mm/radix: Add a kernel command line to disable radix Aneesh Kumar K.V
2016-07-14 5:02 ` Balbir Singh
2016-07-14 8:43 ` Aneesh Kumar K.V
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