From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nicholas Piggin Date: Fri, 16 Aug 2019 04:07:32 +0000 Subject: [PATCH 2/3] powerpc/64s/radix: all CPUs should flush local translation structure before turning MMU Message-Id: <20190816040733.5737-3-npiggin@gmail.com> List-Id: References: <20190816040733.5737-1-npiggin@gmail.com> In-Reply-To: <20190816040733.5737-1-npiggin@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linuxppc-dev@lists.ozlabs.org Cc: "Aneesh Kumar K.V" , kvm-ppc@vger.kernel.org, Nicholas Piggin Rather than sprinkle various translation structure invalidations around different places in early boot, have each CPU flush everything from its local translation structures before enabling its MMU. Radix guests can execute tlbie(l), so have them tlbiel_all in the same place as radix host does. Signed-off-by: Nicholas Piggin --- arch/powerpc/mm/book3s64/radix_pgtable.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c index d60cfa05447a..839e01795211 100644 --- a/arch/powerpc/mm/book3s64/radix_pgtable.c +++ b/arch/powerpc/mm/book3s64/radix_pgtable.c @@ -382,11 +382,6 @@ static void __init radix_init_pgtable(void) */ register_process_table(__pa(process_tb), 0, PRTB_SIZE_SHIFT - 12); pr_info("Process table %p and radix root for kernel: %p\n", process_tb, init_mm.pgd); - asm volatile("ptesync" : : : "memory"); - asm volatile(PPC_TLBIE_5(%0,%1,2,1,1) : : - "r" (TLBIEL_INVAL_SET_LPID), "r" (0)); - asm volatile("eieio; tlbsync; ptesync" : : : "memory"); - trace_tlbie(0, 0, TLBIEL_INVAL_SET_LPID, 0, 2, 1, 1); /* * The init_mm context is given the first available (non-zero) PID, @@ -633,8 +628,7 @@ void __init radix__early_init_mmu(void) radix_init_pgtable(); /* Switch to the guard PID before turning on MMU */ radix__switch_mmu_context(NULL, &init_mm); - if (cpu_has_feature(CPU_FTR_HVMODE)) - tlbiel_all(); + tlbiel_all(); } void radix__early_init_mmu_secondary(void) @@ -653,8 +647,7 @@ void radix__early_init_mmu_secondary(void) } radix__switch_mmu_context(NULL, &init_mm); - if (cpu_has_feature(CPU_FTR_HVMODE)) - tlbiel_all(); + tlbiel_all(); } void radix__mmu_cleanup_all(void) -- 2.22.0