Quark X1000 requires CR3 to be rewritten to flush TLB entries
irrespective of the PGE bits in CR4 or PTE.PGE
Add a comment to setup_arch to indicate that the code
load_cr3(swapper_pg_dir);
__flush_tlb_all();
Will already have flushed the TLB @ the CR3 reload allowing us
to skip over a potential if/else for Quark
Signed-off-by: Bryan O'Donoghue <pure.lo...@nexus-software.ie>
---
arch/x86/kernel/setup.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 41ead8d..e7d7f6e 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -878,6 +878,11 @@ void __init setup_arch(char **cmdline_p)
initial_page_table + KERNEL_PGD_BOUNDARY,
KERNEL_PGD_PTRS);
+ /*
+ * Locate the page directory and flush the TLB.
+ * On Quark X1000 rewriting CR3 flushes the TLB no if/else is required
+ * to choose between __flush_tlb() and __flush_tlb_all()
+ */
load_cr3(swapper_pg_dir);
__flush_tlb_all();
#else
--
1.9.1
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