ARM: 9420/1: smp: Fix SMP for xip kernels

[ Upstream commit 9e9b0cf9319b4db143014477b0bc4b39894248f1 ] Fix the physical address calculation of the following to get smp working on xip kernels. - secondary_data needed for secondary cpu bootup. - secondary_startup address passed through psci. - identity mapped code region needed for enabling mmu for secondary cpus. Signed-off-by: Harith George <[email protected]> Reviewed-by: Linus Walleij <[email protected]> Signed-off-by: Russell King (Oracle) <[email protected]> Signed-off-by: Sasha Levin <[email protected]> (cherry picked from commit 167bda70df1faab6b6627aea24ad4f5ba06264cb)
deepin-community · Dec 7, 2024 · fbbf205 · fbbf205
1 parent ab8e334
commit fbbf205
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diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
@@ -411,7 +411,11 @@ ENTRY(secondary_startup)
 	/*
 	 * Use the page tables supplied from  __cpu_up.
 	 */
+#ifdef CONFIG_XIP_KERNEL
+	ldr	r3, =(secondary_data + PLAT_PHYS_OFFSET - PAGE_OFFSET)
+#else
 	adr_l	r3, secondary_data
+#endif
 	mov_l	r12, __secondary_switched
 	ldrd	r4, r5, [r3, #0]		@ get secondary_data.pgdir
 ARM_BE8(eor	r4, r4, r5)			@ Swap r5 and r4 in BE:

diff --git a/arch/arm/kernel/psci_smp.c b/arch/arm/kernel/psci_smp.c
@@ -45,8 +45,15 @@ extern void secondary_startup(void);
 static int psci_boot_secondary(unsigned int cpu, struct task_struct *idle)
 {
 	if (psci_ops.cpu_on)
+#ifdef CONFIG_XIP_KERNEL
+		return psci_ops.cpu_on(cpu_logical_map(cpu),
+			((phys_addr_t)(&secondary_startup)
+			- XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR)
+			+ CONFIG_XIP_PHYS_ADDR));
+#else
 		return psci_ops.cpu_on(cpu_logical_map(cpu),
 					virt_to_idmap(&secondary_startup));
+#endif
 	return -ENODEV;
 }
 

diff --git a/arch/arm/mm/idmap.c b/arch/arm/mm/idmap.c
@@ -84,8 +84,15 @@ static void identity_mapping_add(pgd_t *pgd, const char *text_start,
 	unsigned long addr, end;
 	unsigned long next;
 
+#ifdef CONFIG_XIP_KERNEL
+	addr = (phys_addr_t)(text_start) - XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR)
+		+ CONFIG_XIP_PHYS_ADDR;
+	end = (phys_addr_t)(text_end) - XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR)
+		+ CONFIG_XIP_PHYS_ADDR;
+#else
 	addr = virt_to_idmap(text_start);
 	end = virt_to_idmap(text_end);
+#endif
 	pr_info("Setting up static identity map for 0x%lx - 0x%lx\n", addr, end);
 
 	prot |= PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AF;