diff options
Diffstat (limited to 'SOURCES/tkg-misc-additions.patch')
| -rw-r--r-- | SOURCES/tkg-misc-additions.patch | 216 |
1 files changed, 0 insertions, 216 deletions
diff --git a/SOURCES/tkg-misc-additions.patch b/SOURCES/tkg-misc-additions.patch index c6065b8..006fa31 100644 --- a/SOURCES/tkg-misc-additions.patch +++ b/SOURCES/tkg-misc-additions.patch @@ -54,219 +54,3 @@ index a54663f2e2ab9f..7ffad3eb0a0150 100644 case IP_VERSION(13, 0, 14): case IP_VERSION(11, 0, 7): case IP_VERSION(11, 0, 11): -From 5863404999cd2cada56e454b1b3a33c43b3c0806 Mon Sep 17 00:00:00 2001 -From: Thomas Gleixner <tglx@linutronix.de> -Date: Sun, 28 Jul 2024 13:06:10 +0200 -Subject: [PATCH] x86/apic: Remove logical destination mode for 64-bit - -Logical destination mode of the local APIC is used for systems with up to -8 CPUs. It has an advantage over physical destination mode as it allows to -target multiple CPUs at once with IPIs. - -That advantage was definitely worth it when systems with up to 8 CPUs -were state of the art for servers and workstations, but that's history. - -Aside of that there are systems which fail to work with logical destination -mode as the ACPI/DMI quirks show and there are AMD Zen1 systems out there -which fail when interrupt remapping is enabled. The latter can be cured by -firmware updates, but not all OEMs distribute the required changes. - -Physical destination mode is guaranteed to work because it is the only way -to get a CPU up and running via the INIT/INIT/STARTUP sequence. - -As the number of CPUs keeps increasing, logical destination mode becomes a -less used code path so there is no real good reason to keep it around. - -Therefore remove logical destination mode support for 64-bit and default to -physical destination mode. - -Signed-off-by: Thomas Gleixner <tglx@linutronix.de> -Cherry-picked-for: https://gitlab.archlinux.org/archlinux/packaging/packages/linux/-/issues/64 ---- - arch/x86/include/asm/apic.h | 8 -- - arch/x86/kernel/apic/apic_flat_64.c | 119 ++-------------------------- - 2 files changed, 7 insertions(+), 120 deletions(-) - -diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h -index 9327eb00e96d09..be2045a18e69b9 100644 ---- a/arch/x86/include/asm/apic.h -+++ b/arch/x86/include/asm/apic.h -@@ -345,20 +345,12 @@ extern struct apic *apic; - * APIC drivers are probed based on how they are listed in the .apicdrivers - * section. So the order is important and enforced by the ordering - * of different apic driver files in the Makefile. -- * -- * For the files having two apic drivers, we use apic_drivers() -- * to enforce the order with in them. - */ - #define apic_driver(sym) \ - static const struct apic *__apicdrivers_##sym __used \ - __aligned(sizeof(struct apic *)) \ - __section(".apicdrivers") = { &sym } - --#define apic_drivers(sym1, sym2) \ -- static struct apic *__apicdrivers_##sym1##sym2[2] __used \ -- __aligned(sizeof(struct apic *)) \ -- __section(".apicdrivers") = { &sym1, &sym2 } -- - extern struct apic *__apicdrivers[], *__apicdrivers_end[]; - - /* -diff --git a/arch/x86/kernel/apic/apic_flat_64.c b/arch/x86/kernel/apic/apic_flat_64.c -index f37ad3392fec91..e0308d8c4e6c27 100644 ---- a/arch/x86/kernel/apic/apic_flat_64.c -+++ b/arch/x86/kernel/apic/apic_flat_64.c -@@ -8,129 +8,25 @@ - * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and - * James Cleverdon. - */ --#include <linux/cpumask.h> - #include <linux/export.h> --#include <linux/acpi.h> - --#include <asm/jailhouse_para.h> - #include <asm/apic.h> - - #include "local.h" - --static struct apic apic_physflat; --static struct apic apic_flat; -- --struct apic *apic __ro_after_init = &apic_flat; --EXPORT_SYMBOL_GPL(apic); -- --static int flat_acpi_madt_oem_check(char *oem_id, char *oem_table_id) --{ -- return 1; --} -- --static void _flat_send_IPI_mask(unsigned long mask, int vector) --{ -- unsigned long flags; -- -- local_irq_save(flags); -- __default_send_IPI_dest_field(mask, vector, APIC_DEST_LOGICAL); -- local_irq_restore(flags); --} -- --static void flat_send_IPI_mask(const struct cpumask *cpumask, int vector) --{ -- unsigned long mask = cpumask_bits(cpumask)[0]; -- -- _flat_send_IPI_mask(mask, vector); --} -- --static void --flat_send_IPI_mask_allbutself(const struct cpumask *cpumask, int vector) --{ -- unsigned long mask = cpumask_bits(cpumask)[0]; -- int cpu = smp_processor_id(); -- -- if (cpu < BITS_PER_LONG) -- __clear_bit(cpu, &mask); -- -- _flat_send_IPI_mask(mask, vector); --} -- --static u32 flat_get_apic_id(u32 x) -+static u32 physflat_get_apic_id(u32 x) - { - return (x >> 24) & 0xFF; - } - --static int flat_probe(void) -+static int physflat_probe(void) - { - return 1; - } - --static struct apic apic_flat __ro_after_init = { -- .name = "flat", -- .probe = flat_probe, -- .acpi_madt_oem_check = flat_acpi_madt_oem_check, -- -- .dest_mode_logical = true, -- -- .disable_esr = 0, -- -- .init_apic_ldr = default_init_apic_ldr, -- .cpu_present_to_apicid = default_cpu_present_to_apicid, -- -- .max_apic_id = 0xFE, -- .get_apic_id = flat_get_apic_id, -- -- .calc_dest_apicid = apic_flat_calc_apicid, -- -- .send_IPI = default_send_IPI_single, -- .send_IPI_mask = flat_send_IPI_mask, -- .send_IPI_mask_allbutself = flat_send_IPI_mask_allbutself, -- .send_IPI_allbutself = default_send_IPI_allbutself, -- .send_IPI_all = default_send_IPI_all, -- .send_IPI_self = default_send_IPI_self, -- .nmi_to_offline_cpu = true, -- -- .read = native_apic_mem_read, -- .write = native_apic_mem_write, -- .eoi = native_apic_mem_eoi, -- .icr_read = native_apic_icr_read, -- .icr_write = native_apic_icr_write, -- .wait_icr_idle = apic_mem_wait_icr_idle, -- .safe_wait_icr_idle = apic_mem_wait_icr_idle_timeout, --}; -- --/* -- * Physflat mode is used when there are more than 8 CPUs on a system. -- * We cannot use logical delivery in this case because the mask -- * overflows, so use physical mode. -- */ - static int physflat_acpi_madt_oem_check(char *oem_id, char *oem_table_id) - { --#ifdef CONFIG_ACPI -- /* -- * Quirk: some x86_64 machines can only use physical APIC mode -- * regardless of how many processors are present (x86_64 ES7000 -- * is an example). -- */ -- if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && -- (acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL)) { -- printk(KERN_DEBUG "system APIC only can use physical flat"); -- return 1; -- } -- -- if (!strncmp(oem_id, "IBM", 3) && !strncmp(oem_table_id, "EXA", 3)) { -- printk(KERN_DEBUG "IBM Summit detected, will use apic physical"); -- return 1; -- } --#endif -- -- return 0; --} -- --static int physflat_probe(void) --{ -- return apic == &apic_physflat || num_possible_cpus() > 8 || jailhouse_paravirt(); -+ return 1; - } - - static struct apic apic_physflat __ro_after_init = { -@@ -146,7 +42,7 @@ static struct apic apic_physflat __ro_after_init = { - .cpu_present_to_apicid = default_cpu_present_to_apicid, - - .max_apic_id = 0xFE, -- .get_apic_id = flat_get_apic_id, -+ .get_apic_id = physflat_get_apic_id, - - .calc_dest_apicid = apic_default_calc_apicid, - -@@ -166,8 +62,7 @@ static struct apic apic_physflat __ro_after_init = { - .wait_icr_idle = apic_mem_wait_icr_idle, - .safe_wait_icr_idle = apic_mem_wait_icr_idle_timeout, - }; -+apic_driver(apic_physflat); - --/* -- * We need to check for physflat first, so this order is important. -- */ --apic_drivers(apic_physflat, apic_flat); -+struct apic *apic __ro_after_init = &apic_physflat; -+EXPORT_SYMBOL_GPL(apic); |