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Commit d6c88600 authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Michael Ellerman
Browse files

powerpc/mm/radix: Update LPCR only if it is powernv 



LPCR cannot be updated when running in guest mode.

Fixes: 2bfd65e4 ("powerpc/mm/radix: Add radix callbacks for early init routines")
Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 8dd75ccb

arch/powerpc/mm/pgtable-radix.c

+10 −13
Original line number Diff line number Diff line
@@ -296,11 +296,6 @@ static void __init radix_init_page_sizes(void) 
void __init radix__early_init_mmu(void)

{

	unsigned long lpcr;

	/*

	 * setup LPCR UPRT based on mmu_features

	 */

	lpcr = mfspr(SPRN_LPCR);

	mtspr(SPRN_LPCR, lpcr | LPCR_UPRT);



#ifdef CONFIG_PPC_64K_PAGES

	/* PAGE_SIZE mappings */
@@ -343,8 +338,11 @@ void __init radix__early_init_mmu(void) 
	__pte_frag_size_shift = H_PTE_FRAG_SIZE_SHIFT;



	radix_init_page_sizes();

	if (!firmware_has_feature(FW_FEATURE_LPAR))

	if (!firmware_has_feature(FW_FEATURE_LPAR)) {

		lpcr = mfspr(SPRN_LPCR);

		mtspr(SPRN_LPCR, lpcr | LPCR_UPRT);

		radix_init_partition_table();

	}



	radix_init_pgtable();

}
@@ -353,17 +351,16 @@ void radix__early_init_mmu_secondary(void) 
{

	unsigned long lpcr;

	/*

	 * setup LPCR UPRT based on mmu_features

	 * update partition table control register and UPRT

	 */

	if (!firmware_has_feature(FW_FEATURE_LPAR)) {

		lpcr = mfspr(SPRN_LPCR);

		mtspr(SPRN_LPCR, lpcr | LPCR_UPRT);

	/*

	 * update partition table control register, 64 K size.

	 */

	if (!firmware_has_feature(FW_FEATURE_LPAR))



		mtspr(SPRN_PTCR,

		      __pa(partition_tb) | (PATB_SIZE_SHIFT - 12));

	}

}



void radix__setup_initial_memory_limit(phys_addr_t first_memblock_base,

				phys_addr_t first_memblock_size)