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-rw-r--r--arch/arm/Kconfig2
-rw-r--r--arch/arm/Makefile2
-rw-r--r--arch/arm64/include/asm/assembler.h5
-rw-r--r--arch/arm64/kernel/entry.S6
-rw-r--r--arch/x86/hyperv/irqdomain.c4
-rw-r--r--arch/x86/include/asm/debugreg.h19
-rw-r--r--arch/x86/include/asm/kvm_host.h2
-rw-r--r--arch/x86/kernel/cpu/common.c2
-rw-r--r--arch/x86/kernel/kgdb.c2
-rw-r--r--arch/x86/kernel/process_32.c2
-rw-r--r--arch/x86/kernel/process_64.c2
-rw-r--r--arch/x86/kvm/x86.c4
12 files changed, 36 insertions, 16 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 25ed6f1a7c7ae..e55a3fee104a8 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -121,7 +121,7 @@ config ARM
select HAVE_KERNEL_XZ
select HAVE_KPROBES if !XIP_KERNEL && !CPU_ENDIAN_BE32 && !CPU_V7M
select HAVE_KRETPROBES if HAVE_KPROBES
- select HAVE_LD_DEAD_CODE_DATA_ELIMINATION if (LD_VERSION >= 23600 || LD_CAN_USE_KEEP_IN_OVERLAY)
+ select HAVE_LD_DEAD_CODE_DATA_ELIMINATION if (LD_VERSION >= 23600 || LD_IS_LLD) && LD_CAN_USE_KEEP_IN_OVERLAY
select HAVE_MOD_ARCH_SPECIFIC
select HAVE_NMI
select HAVE_OPTPROBES if !THUMB2_KERNEL
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 4808d3ed98e42..e31e95ffd33fc 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -149,7 +149,7 @@ endif
# Need -Uarm for gcc < 3.x
KBUILD_CPPFLAGS +=$(cpp-y)
KBUILD_CFLAGS +=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm
-KBUILD_AFLAGS +=$(CFLAGS_ABI) $(AFLAGS_ISA) -Wa,$(arch-y) $(tune-y) -include asm/unified.h -msoft-float
+KBUILD_AFLAGS +=$(CFLAGS_ABI) $(AFLAGS_ISA) -Wa,$(arch-y) $(tune-y) -include $(srctree)/arch/arm/include/asm/unified.h -msoft-float
KBUILD_RUSTFLAGS += --target=arm-unknown-linux-gnueabi
CHECKFLAGS += -D__arm__
diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h
index ad63457a05c5b..c56c21bb1eec2 100644
--- a/arch/arm64/include/asm/assembler.h
+++ b/arch/arm64/include/asm/assembler.h
@@ -41,6 +41,11 @@
/*
* Save/restore interrupts.
*/
+ .macro save_and_disable_daif, flags
+ mrs \flags, daif
+ msr daifset, #0xf
+ .endm
+
.macro save_and_disable_irq, flags
mrs \flags, daif
msr daifset, #3
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
index 5ae2a34b50bda..30dcb719685b7 100644
--- a/arch/arm64/kernel/entry.S
+++ b/arch/arm64/kernel/entry.S
@@ -825,6 +825,7 @@ SYM_CODE_END(__bp_harden_el1_vectors)
*
*/
SYM_FUNC_START(cpu_switch_to)
+ save_and_disable_daif x11
mov x10, #THREAD_CPU_CONTEXT
add x8, x0, x10
mov x9, sp
@@ -848,6 +849,7 @@ SYM_FUNC_START(cpu_switch_to)
ptrauth_keys_install_kernel x1, x8, x9, x10
scs_save x0
scs_load_current
+ restore_irq x11
ret
SYM_FUNC_END(cpu_switch_to)
NOKPROBE(cpu_switch_to)
@@ -874,6 +876,7 @@ NOKPROBE(ret_from_fork)
* Calls func(regs) using this CPU's irq stack and shadow irq stack.
*/
SYM_FUNC_START(call_on_irq_stack)
+ save_and_disable_daif x9
#ifdef CONFIG_SHADOW_CALL_STACK
get_current_task x16
scs_save x16
@@ -888,8 +891,10 @@ SYM_FUNC_START(call_on_irq_stack)
/* Move to the new stack and call the function there */
add sp, x16, #IRQ_STACK_SIZE
+ restore_irq x9
blr x1
+ save_and_disable_daif x9
/*
* Restore the SP from the FP, and restore the FP and LR from the frame
* record.
@@ -897,6 +902,7 @@ SYM_FUNC_START(call_on_irq_stack)
mov sp, x29
ldp x29, x30, [sp], #16
scs_load_current
+ restore_irq x9
ret
SYM_FUNC_END(call_on_irq_stack)
NOKPROBE(call_on_irq_stack)
diff --git a/arch/x86/hyperv/irqdomain.c b/arch/x86/hyperv/irqdomain.c
index 31f0d29cbc5e3..e28c317ac9e81 100644
--- a/arch/x86/hyperv/irqdomain.c
+++ b/arch/x86/hyperv/irqdomain.c
@@ -192,7 +192,6 @@ static void hv_irq_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
struct pci_dev *dev;
struct hv_interrupt_entry out_entry, *stored_entry;
struct irq_cfg *cfg = irqd_cfg(data);
- const cpumask_t *affinity;
int cpu;
u64 status;
@@ -204,8 +203,7 @@ static void hv_irq_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
return;
}
- affinity = irq_data_get_effective_affinity_mask(data);
- cpu = cpumask_first_and(affinity, cpu_online_mask);
+ cpu = cpumask_first(irq_data_get_effective_affinity_mask(data));
if (data->chip_data) {
/*
diff --git a/arch/x86/include/asm/debugreg.h b/arch/x86/include/asm/debugreg.h
index fdbbbfec745aa..820b4aeabd0c2 100644
--- a/arch/x86/include/asm/debugreg.h
+++ b/arch/x86/include/asm/debugreg.h
@@ -9,6 +9,14 @@
#include <asm/cpufeature.h>
#include <asm/msr.h>
+/*
+ * Define bits that are always set to 1 in DR7, only bit 10 is
+ * architecturally reserved to '1'.
+ *
+ * This is also the init/reset value for DR7.
+ */
+#define DR7_FIXED_1 0x00000400
+
DECLARE_PER_CPU(unsigned long, cpu_dr7);
#ifndef CONFIG_PARAVIRT_XXL
@@ -100,8 +108,8 @@ static __always_inline void native_set_debugreg(int regno, unsigned long value)
static inline void hw_breakpoint_disable(void)
{
- /* Zero the control register for HW Breakpoint */
- set_debugreg(0UL, 7);
+ /* Reset the control register for HW Breakpoint */
+ set_debugreg(DR7_FIXED_1, 7);
/* Zero-out the individual HW breakpoint address registers */
set_debugreg(0UL, 0);
@@ -125,9 +133,12 @@ static __always_inline unsigned long local_db_save(void)
return 0;
get_debugreg(dr7, 7);
- dr7 &= ~0x400; /* architecturally set bit */
+
+ /* Architecturally set bit */
+ dr7 &= ~DR7_FIXED_1;
if (dr7)
- set_debugreg(0, 7);
+ set_debugreg(DR7_FIXED_1, 7);
+
/*
* Ensure the compiler doesn't lower the above statements into
* the critical section; disabling breakpoints late would not
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index f094493232b64..8980786686bff 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -31,6 +31,7 @@
#include <asm/apic.h>
#include <asm/pvclock-abi.h>
+#include <asm/debugreg.h>
#include <asm/desc.h>
#include <asm/mtrr.h>
#include <asm/msr-index.h>
@@ -247,7 +248,6 @@ enum x86_intercept_stage;
#define DR7_BP_EN_MASK 0x000000ff
#define DR7_GE (1 << 9)
#define DR7_GD (1 << 13)
-#define DR7_FIXED_1 0x00000400
#define DR7_VOLATILE 0xffff2bff
#define KVM_GUESTDBG_VALID_MASK \
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index c39c5c37f4e82..bab44900b937c 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -2220,7 +2220,7 @@ EXPORT_PER_CPU_SYMBOL(__stack_chk_guard);
static void initialize_debug_regs(void)
{
/* Control register first -- to make sure everything is disabled. */
- set_debugreg(0, 7);
+ set_debugreg(DR7_FIXED_1, 7);
set_debugreg(DR6_RESERVED, 6);
/* dr5 and dr4 don't exist */
set_debugreg(0, 3);
diff --git a/arch/x86/kernel/kgdb.c b/arch/x86/kernel/kgdb.c
index 102641fd21728..8b1a9733d13e3 100644
--- a/arch/x86/kernel/kgdb.c
+++ b/arch/x86/kernel/kgdb.c
@@ -385,7 +385,7 @@ static void kgdb_disable_hw_debug(struct pt_regs *regs)
struct perf_event *bp;
/* Disable hardware debugging while we are in kgdb: */
- set_debugreg(0UL, 7);
+ set_debugreg(DR7_FIXED_1, 7);
for (i = 0; i < HBP_NUM; i++) {
if (!breakinfo[i].enabled)
continue;
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 4636ef3599737..3c7621663800b 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -93,7 +93,7 @@ void __show_regs(struct pt_regs *regs, enum show_regs_mode mode,
/* Only print out debug registers if they are in their non-default state. */
if ((d0 == 0) && (d1 == 0) && (d2 == 0) && (d3 == 0) &&
- (d6 == DR6_RESERVED) && (d7 == 0x400))
+ (d6 == DR6_RESERVED) && (d7 == DR7_FIXED_1))
return;
printk("%sDR0: %08lx DR1: %08lx DR2: %08lx DR3: %08lx\n",
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 7196ca7048be0..8565aa31afafe 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -132,7 +132,7 @@ void __show_regs(struct pt_regs *regs, enum show_regs_mode mode,
/* Only print out debug registers if they are in their non-default state. */
if (!((d0 == 0) && (d1 == 0) && (d2 == 0) && (d3 == 0) &&
- (d6 == DR6_RESERVED) && (d7 == 0x400))) {
+ (d6 == DR6_RESERVED) && (d7 == DR7_FIXED_1))) {
printk("%sDR0: %016lx DR1: %016lx DR2: %016lx\n",
log_lvl, d0, d1, d2);
printk("%sDR3: %016lx DR6: %016lx DR7: %016lx\n",
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index be7bb6d20129d..7bae91eb7b234 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -10979,7 +10979,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
wrmsrl(MSR_IA32_XFD_ERR, vcpu->arch.guest_fpu.xfd_err);
if (unlikely(vcpu->arch.switch_db_regs)) {
- set_debugreg(0, 7);
+ set_debugreg(DR7_FIXED_1, 7);
set_debugreg(vcpu->arch.eff_db[0], 0);
set_debugreg(vcpu->arch.eff_db[1], 1);
set_debugreg(vcpu->arch.eff_db[2], 2);
@@ -10988,7 +10988,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
if (unlikely(vcpu->arch.switch_db_regs & KVM_DEBUGREG_WONT_EXIT))
kvm_x86_call(set_dr6)(vcpu, vcpu->arch.dr6);
} else if (unlikely(hw_breakpoint_active())) {
- set_debugreg(0, 7);
+ set_debugreg(DR7_FIXED_1, 7);
}
vcpu->arch.host_debugctl = get_debugctlmsr();
generated by cgit v1.2.3 (git 2.39.1) at 2025-08-06 13:41:15 +0000