xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

powerpc/64s: move machine check SLB flushing to mm/slb.c

Browse Source 
The machine check code that flushes and restores bolted segments in
real mode belongs in mm/slb.c. This will also be used by pseries
machine check and idle code in future changes.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Nicholas Piggin
2018-08-10 16:42:48 +10:00
committed by Michael Ellerman
parent ae24ce5e12
commit e7e8184747
3 changed files with 51 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
arch/powerpc/kernel/mce_power.c
View File

@@ -62,11 +62,8 @@ static unsigned long addr_to_pfn(struct pt_regs *regs, unsigned long addr)
#ifdef CONFIG_PPC_BOOK3S_64
static void flush_and_reload_slb(void)
{
struct slb_shadow *slb;
unsigned long i, n;
/* Invalidate all SLBs */
asm volatile("slbmte %0,%0; slbia" : : "r" (0));
slb_flush_all_realmode();
#ifdef CONFIG_KVM_BOOK3S_HANDLER
/*
@@ -76,22 +73,17 @@ static void flush_and_reload_slb(void)
if (get_paca()->kvm_hstate.in_guest)
return;
#endif
/* For host kernel, reload the SLBs from shadow SLB buffer. */
slb = get_slb_shadow();
if (!slb)
if (early_radix_enabled())
return;
n = min_t(u32, be32_to_cpu(slb->persistent), SLB_MIN_SIZE);
/*
* This probably shouldn't happen, but it may be possible it's
* called in early boot before SLB shadows are allocated.
*/
if (!get_slb_shadow())
return;
/* Load up the SLB entries from shadow SLB */
for (i = 0; i < n; i++) {
unsigned long rb = be64_to_cpu(slb->save_area[i].esid);
unsigned long rs = be64_to_cpu(slb->save_area[i].vsid);
rb = (rb & ~0xFFFul) | i;
asm volatile("slbmte %0,%1" : : "r" (rs), "r" (rb));
}
slb_restore_bolted_realmode();
}
#endif