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powerpc fixes for 4.8 #5

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- Don't alias user region to other regions below PAGE_OFFSET from Paul Mackerras
  - Fix again csum_partial_copy_generic() on 32-bit from Christophe Leroy
  - Fix corrupted PE allocation bitmap on releasing PE from Gavin Shan
 
 Fixes for code merged this cycle:
  - Fix crash on releasing compound PE from Gavin Shan
  - Fix processor numbers in OPAL ICP from Benjamin Herrenschmidt
  - Fix little endian build with CONFIG_KEXEC=n from Thiago Jung Bauermann
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Merge tag 'powerpc-4.8-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "Fixes marked for stable:
   - Don't alias user region to other regions below PAGE_OFFSET from
     Paul Mackerras
   - Fix again csum_partial_copy_generic() on 32-bit from Christophe
     Leroy
   - Fix corrupted PE allocation bitmap on releasing PE from Gavin Shan

  Fixes for code merged this cycle:
   - Fix crash on releasing compound PE from Gavin Shan
   - Fix processor numbers in OPAL ICP from Benjamin Herrenschmidt
   - Fix little endian build with CONFIG_KEXEC=n from Thiago Jung
     Bauermann"

* tag 'powerpc-4.8-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/mm: Don't alias user region to other regions below PAGE_OFFSET
  powerpc/32: Fix again csum_partial_copy_generic()
  powerpc/powernv: Fix corrupted PE allocation bitmap on releasing PE
  powerpc/powernv: Fix crash on releasing compound PE
  powerpc/xics/opal: Fix processor numbers in OPAL ICP
  powerpc/pseries: Fix little endian build with CONFIG_KEXEC=n
This commit is contained in:
Linus Torvalds 2016-09-09 08:43:42 -07:00
commit 2771fc8ed6
5 changed files with 29 additions and 17 deletions
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7
arch/powerpc/lib/checksum_32.S
View File

@ -127,18 +127,19 @@ _GLOBAL(csum_partial_copy_generic)
stw r7,12(r1)
stw r8,8(r1)
rlwinm r0,r4,3,0x8
rlwnm r6,r6,r0,0,31 /* odd destination address: rotate one byte */
cmplwi cr7,r0,0 /* is destination address even ? */
addic r12,r6,0
addi r6,r4,-4
neg r0,r4
addi r4,r3,-4
andi. r0,r0,CACHELINE_MASK /* # bytes to start of cache line */
crset 4*cr7+eq
beq 58f
cmplw 0,r5,r0 /* is this more than total to do? */
blt 63f /* if not much to do */
rlwinm r7,r6,3,0x8
rlwnm r12,r12,r7,0,31 /* odd destination address: rotate one byte */
cmplwi cr7,r7,0 /* is destination address even ? */
andi. r8,r0,3 /* get it word-aligned first */
mtctr r8
beq+ 61f

7
arch/powerpc/mm/slb_low.S
View File

@ -113,7 +113,12 @@ BEGIN_FTR_SECTION
END_MMU_FTR_SECTION_IFCLR(MMU_FTR_1T_SEGMENT)
b slb_finish_load_1T
0:
0: /*
* For userspace addresses, make sure this is region 0.
*/
cmpdi r9, 0
bne 8f
/* when using slices, we extract the psize off the slice bitmaps
* and then we need to get the sllp encoding off the mmu_psize_defs
* array.

18
arch/powerpc/platforms/powernv/pci-ioda.c
View File

@ -162,11 +162,12 @@ static struct pnv_ioda_pe *pnv_ioda_alloc_pe(struct pnv_phb *phb)
static void pnv_ioda_free_pe(struct pnv_ioda_pe *pe)
{
struct pnv_phb *phb = pe->phb;
unsigned int pe_num = pe->pe_number;
WARN_ON(pe->pdev);
memset(pe, 0, sizeof(struct pnv_ioda_pe));
clear_bit(pe->pe_number, phb->ioda.pe_alloc);
clear_bit(pe_num, phb->ioda.pe_alloc);
}
/* The default M64 BAR is shared by all PEs */
@ -3402,12 +3403,6 @@ static void pnv_ioda_release_pe(struct pnv_ioda_pe *pe)
struct pnv_phb *phb = pe->phb;
struct pnv_ioda_pe *slave, *tmp;
/* Release slave PEs in compound PE */
if (pe->flags & PNV_IODA_PE_MASTER) {
list_for_each_entry_safe(slave, tmp, &pe->slaves, list)
pnv_ioda_release_pe(slave);
}
list_del(&pe->list);
switch (phb->type) {
case PNV_PHB_IODA1:
@ -3422,6 +3417,15 @@ static void pnv_ioda_release_pe(struct pnv_ioda_pe *pe)
pnv_ioda_release_pe_seg(pe);
pnv_ioda_deconfigure_pe(pe->phb, pe);
/* Release slave PEs in the compound PE */
if (pe->flags & PNV_IODA_PE_MASTER) {
list_for_each_entry_safe(slave, tmp, &pe->slaves, list) {
list_del(&slave->list);
pnv_ioda_free_pe(slave);
}
}
pnv_ioda_free_pe(pe);
}

2
arch/powerpc/platforms/pseries/setup.c
View File

@ -41,7 +41,6 @@
#include <linux/root_dev.h>
#include <linux/of.h>
#include <linux/of_pci.h>
#include <linux/kexec.h>
#include <asm/mmu.h>
#include <asm/processor.h>
@ -66,6 +65,7 @@
#include <asm/eeh.h>
#include <asm/reg.h>
#include <asm/plpar_wrappers.h>
#include <asm/kexec.h>
#include "pseries.h"

12
arch/powerpc/sysdev/xics/icp-opal.c
View File

@ -23,10 +23,10 @@
static void icp_opal_teardown_cpu(void)
{
int cpu = smp_processor_id();
int hw_cpu = hard_smp_processor_id();
/* Clear any pending IPI */
opal_int_set_mfrr(cpu, 0xff);
opal_int_set_mfrr(hw_cpu, 0xff);
}
static void icp_opal_flush_ipi(void)
@ -101,14 +101,16 @@ static void icp_opal_eoi(struct irq_data *d)
static void icp_opal_cause_ipi(int cpu, unsigned long data)
{
opal_int_set_mfrr(cpu, IPI_PRIORITY);
int hw_cpu = get_hard_smp_processor_id(cpu);
opal_int_set_mfrr(hw_cpu, IPI_PRIORITY);
}
static irqreturn_t icp_opal_ipi_action(int irq, void *dev_id)
{
int cpu = smp_processor_id();
int hw_cpu = hard_smp_processor_id();
opal_int_set_mfrr(cpu, 0xff);
opal_int_set_mfrr(hw_cpu, 0xff);
return smp_ipi_demux();
}