arm64 fixes for -rc2
- Big bad batch of MAINTAINERS updates - Fix handling of SP alignment fault exceptions - Fix PSTATE.SSBS handling on heterogeneous systems - Fix fallout from moving to the generic vDSO implementation - Fix stack unwinding in the face of frame corruption - Fix off-by-one in IORT code - Minor SVE cleanups -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEPxTL6PPUbjXGY88ct6xw3ITBYzQFAl062dMACgkQt6xw3ITB YzQD9Qf+LvNj+i1UaVUjmUTAhThbIiPZPcz9rkeMc50AZl7O8XlRH8p4z8lWMJ8l sAqfsDAAdVsKOJPFYWnV432z5VmUNfwaw8Mjlx2Ij1I4C2lbA9fr5uW4Umn7s/B3 IpbD4nFBt4UX24Ps3YD5fbrdTBtMsBiDRBxzTBouTalfP+nT/d1PB50CqCUBFEJ4 hYoG2IbfsAOPVDnH33J3svehWJn7RerfbgX0Mb4ssxeonswuNdiYUnzUfkJuvVuW lWaUck4G0y5tWmULQLn7n9RVgBMq1hWE/731gRhtR4hiHA79ml8b2AggnosIwfLO 064KsHGrb4+jUUNQ1KIQzTU3sKdkVg== =nLT9 -----END PGP SIGNATURE----- Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Will Deacon: "There's more here than we usually have at this stage, but that's mainly down to the stacktrace changes which came in slightly too late for the merge window. Summary: - Big bad batch of MAINTAINERS updates - Fix handling of SP alignment fault exceptions - Fix PSTATE.SSBS handling on heterogeneous systems - Fix fallout from moving to the generic vDSO implementation - Fix stack unwinding in the face of frame corruption - Fix off-by-one in IORT code - Minor SVE cleanups" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: ACPI/IORT: Fix off-by-one check in iort_dev_find_its_id() arm64: entry: SP Alignment Fault doesn't write to FAR_EL1 arm64: Force SSBS on context switch MAINTAINERS: Update my email address MAINTAINERS: Update my email address MAINTAINERS: Fix spelling mistake in my name MAINTAINERS: Update my email address to @kernel.org arm64: mm: Drop pte_huge() arm64/sve: Fix a couple of magic numbers for the Z-reg count arm64/sve: Factor out FPSIMD to SVE state conversion arm64: stacktrace: Better handle corrupted stacks arm64: stacktrace: Factor out backtrace initialisation arm64: stacktrace: Constify stacktrace.h functions arm64: vdso: Cleanup Makefiles arm64: vdso: fix flip/flop vdso build bug arm64: vdso: Fix population of AT_SYSINFO_EHDR for compat vdso
This commit is contained in:
Linus Torvalds
Коммит
0ed2886656
3
.mailmap
3
.mailmap
|
|
@ -98,6 +98,7 @@ Jason Gunthorpe <jgg@ziepe.ca> <jgunthorpe@obsidianresearch.com>
|
|||
Javi Merino <javi.merino@kernel.org> <javi.merino@arm.com>
|
||||
<javier@osg.samsung.com> <javier.martinez@collabora.co.uk>
|
||||
Jean Tourrilhes <jt@hpl.hp.com>
|
||||
<jean-philippe@linaro.org> <jean-philippe.brucker@arm.com>
|
||||
Jeff Garzik <jgarzik@pretzel.yyz.us>
|
||||
Jeff Layton <jlayton@kernel.org> <jlayton@redhat.com>
|
||||
Jeff Layton <jlayton@kernel.org> <jlayton@poochiereds.net>
|
||||
|
|
@ -116,6 +117,7 @@ John Stultz <johnstul@us.ibm.com>
|
|||
Juha Yrjola <at solidboot.com>
|
||||
Juha Yrjola <juha.yrjola@nokia.com>
|
||||
Juha Yrjola <juha.yrjola@solidboot.com>
|
||||
Julien Thierry <julien.thierry.kdev@gmail.com> <julien.thierry@arm.com>
|
||||
Kay Sievers <kay.sievers@vrfy.org>
|
||||
Kenneth W Chen <kenneth.w.chen@intel.com>
|
||||
Konstantin Khlebnikov <koct9i@gmail.com> <k.khlebnikov@samsung.com>
|
||||
|
|
@ -132,6 +134,7 @@ Linus Lüssing <linus.luessing@c0d3.blue> <linus.luessing@ascom.ch>
|
|||
Li Yang <leoyang.li@nxp.com> <leo@zh-kernel.org>
|
||||
Li Yang <leoyang.li@nxp.com> <leoli@freescale.com>
|
||||
Maciej W. Rozycki <macro@mips.com> <macro@imgtec.com>
|
||||
Marc Zyngier <maz@kernel.org> <marc.zyngier@arm.com>
|
||||
Marcin Nowakowski <marcin.nowakowski@mips.com> <marcin.nowakowski@imgtec.com>
|
||||
Mark Brown <broonie@sirena.org.uk>
|
||||
Mark Yao <markyao0591@gmail.com> <mark.yao@rock-chips.com>
|
||||
|
|
|
|||
14
MAINTAINERS
14
MAINTAINERS
|
|
@ -1194,7 +1194,7 @@ F: include/uapi/linux/if_arcnet.h
|
|||
|
||||
ARM ARCHITECTED TIMER DRIVER
|
||||
M: Mark Rutland <mark.rutland@arm.com>
|
||||
M: Marc Zyngier <marc.zyngier@arm.com>
|
||||
M: Marc Zyngier <maz@kernel.org>
|
||||
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
|
||||
S: Maintained
|
||||
F: arch/arm/include/asm/arch_timer.h
|
||||
|
|
@ -8490,7 +8490,7 @@ S: Obsolete
|
|||
F: include/uapi/linux/ipx.h
|
||||
|
||||
IRQ DOMAINS (IRQ NUMBER MAPPING LIBRARY)
|
||||
M: Marc Zyngier <marc.zyngier@arm.com>
|
||||
M: Marc Zyngier <maz@kernel.org>
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||||
S: Maintained
|
||||
T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq/core
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||||
F: Documentation/IRQ-domain.txt
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||||
|
|
@ -8508,7 +8508,7 @@ F: kernel/irq/
|
|||
IRQCHIP DRIVERS
|
||||
M: Thomas Gleixner <tglx@linutronix.de>
|
||||
M: Jason Cooper <jason@lakedaemon.net>
|
||||
M: Marc Zyngier <marc.zyngier@arm.com>
|
||||
M: Marc Zyngier <maz@kernel.org>
|
||||
L: linux-kernel@vger.kernel.org
|
||||
S: Maintained
|
||||
T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq/core
|
||||
|
|
@ -8828,10 +8828,10 @@ F: arch/x86/include/asm/svm.h
|
|||
F: arch/x86/kvm/svm.c
|
||||
|
||||
KERNEL VIRTUAL MACHINE FOR ARM/ARM64 (KVM/arm, KVM/arm64)
|
||||
M: Marc Zyngier <marc.zyngier@arm.com>
|
||||
M: Marc Zyngier <maz@kernel.org>
|
||||
R: James Morse <james.morse@arm.com>
|
||||
R: Julien Thierry <julien.thierry@arm.com>
|
||||
R: Suzuki K Pouloze <suzuki.poulose@arm.com>
|
||||
R: Julien Thierry <julien.thierry.kdev@gmail.com>
|
||||
R: Suzuki K Poulose <suzuki.poulose@arm.com>
|
||||
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
|
||||
L: kvmarm@lists.cs.columbia.edu
|
||||
T: git git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git
|
||||
|
|
@ -17124,7 +17124,7 @@ F: drivers/virtio/virtio_input.c
|
|||
F: include/uapi/linux/virtio_input.h
|
||||
|
||||
VIRTIO IOMMU DRIVER
|
||||
M: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
|
||||
M: Jean-Philippe Brucker <jean-philippe@linaro.org>
|
||||
L: virtualization@lists.linux-foundation.org
|
||||
S: Maintained
|
||||
F: drivers/iommu/virtio-iommu.c
|
||||
|
|
|
|||
|
|
@ -202,7 +202,7 @@ typedef compat_elf_greg_t compat_elf_gregset_t[COMPAT_ELF_NGREG];
|
|||
({ \
|
||||
set_thread_flag(TIF_32BIT); \
|
||||
})
|
||||
#ifdef CONFIG_GENERIC_COMPAT_VDSO
|
||||
#ifdef CONFIG_COMPAT_VDSO
|
||||
#define COMPAT_ARCH_DLINFO \
|
||||
do { \
|
||||
/* \
|
||||
|
|
|
|||
|
|
@ -301,7 +301,6 @@ static inline int pte_same(pte_t pte_a, pte_t pte_b)
|
|||
/*
|
||||
* Huge pte definitions.
|
||||
*/
|
||||
#define pte_huge(pte) (!(pte_val(pte) & PTE_TABLE_BIT))
|
||||
#define pte_mkhuge(pte) (__pte(pte_val(pte) & ~PTE_TABLE_BIT))
|
||||
|
||||
/*
|
||||
|
|
|
|||
|
|
@ -193,6 +193,16 @@ static inline void start_thread_common(struct pt_regs *regs, unsigned long pc)
|
|||
regs->pmr_save = GIC_PRIO_IRQON;
|
||||
}
|
||||
|
||||
static inline void set_ssbs_bit(struct pt_regs *regs)
|
||||
{
|
||||
regs->pstate |= PSR_SSBS_BIT;
|
||||
}
|
||||
|
||||
static inline void set_compat_ssbs_bit(struct pt_regs *regs)
|
||||
{
|
||||
regs->pstate |= PSR_AA32_SSBS_BIT;
|
||||
}
|
||||
|
||||
static inline void start_thread(struct pt_regs *regs, unsigned long pc,
|
||||
unsigned long sp)
|
||||
{
|
||||
|
|
@ -200,7 +210,7 @@ static inline void start_thread(struct pt_regs *regs, unsigned long pc,
|
|||
regs->pstate = PSR_MODE_EL0t;
|
||||
|
||||
if (arm64_get_ssbd_state() != ARM64_SSBD_FORCE_ENABLE)
|
||||
regs->pstate |= PSR_SSBS_BIT;
|
||||
set_ssbs_bit(regs);
|
||||
|
||||
regs->sp = sp;
|
||||
}
|
||||
|
|
@ -219,7 +229,7 @@ static inline void compat_start_thread(struct pt_regs *regs, unsigned long pc,
|
|||
#endif
|
||||
|
||||
if (arm64_get_ssbd_state() != ARM64_SSBD_FORCE_ENABLE)
|
||||
regs->pstate |= PSR_AA32_SSBS_BIT;
|
||||
set_compat_ssbs_bit(regs);
|
||||
|
||||
regs->compat_sp = sp;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -8,19 +8,12 @@
|
|||
#include <linux/percpu.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/sched/task_stack.h>
|
||||
#include <linux/types.h>
|
||||
|
||||
#include <asm/memory.h>
|
||||
#include <asm/ptrace.h>
|
||||
#include <asm/sdei.h>
|
||||
|
||||
struct stackframe {
|
||||
unsigned long fp;
|
||||
unsigned long pc;
|
||||
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
||||
int graph;
|
||||
#endif
|
||||
};
|
||||
|
||||
enum stack_type {
|
||||
STACK_TYPE_UNKNOWN,
|
||||
STACK_TYPE_TASK,
|
||||
|
|
@ -28,6 +21,7 @@ enum stack_type {
|
|||
STACK_TYPE_OVERFLOW,
|
||||
STACK_TYPE_SDEI_NORMAL,
|
||||
STACK_TYPE_SDEI_CRITICAL,
|
||||
__NR_STACK_TYPES
|
||||
};
|
||||
|
||||
struct stack_info {
|
||||
|
|
@ -36,6 +30,37 @@ struct stack_info {
|
|||
enum stack_type type;
|
||||
};
|
||||
|
||||
/*
|
||||
* A snapshot of a frame record or fp/lr register values, along with some
|
||||
* accounting information necessary for robust unwinding.
|
||||
*
|
||||
* @fp: The fp value in the frame record (or the real fp)
|
||||
* @pc: The fp value in the frame record (or the real lr)
|
||||
*
|
||||
* @stacks_done: Stacks which have been entirely unwound, for which it is no
|
||||
* longer valid to unwind to.
|
||||
*
|
||||
* @prev_fp: The fp that pointed to this frame record, or a synthetic value
|
||||
* of 0. This is used to ensure that within a stack, each
|
||||
* subsequent frame record is at an increasing address.
|
||||
* @prev_type: The type of stack this frame record was on, or a synthetic
|
||||
* value of STACK_TYPE_UNKNOWN. This is used to detect a
|
||||
* transition from one stack to another.
|
||||
*
|
||||
* @graph: When FUNCTION_GRAPH_TRACER is selected, holds the index of a
|
||||
* replacement lr value in the ftrace graph stack.
|
||||
*/
|
||||
struct stackframe {
|
||||
unsigned long fp;
|
||||
unsigned long pc;
|
||||
DECLARE_BITMAP(stacks_done, __NR_STACK_TYPES);
|
||||
unsigned long prev_fp;
|
||||
enum stack_type prev_type;
|
||||
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
||||
int graph;
|
||||
#endif
|
||||
};
|
||||
|
||||
extern int unwind_frame(struct task_struct *tsk, struct stackframe *frame);
|
||||
extern void walk_stackframe(struct task_struct *tsk, struct stackframe *frame,
|
||||
int (*fn)(struct stackframe *, void *), void *data);
|
||||
|
|
@ -64,8 +89,9 @@ static inline bool on_irq_stack(unsigned long sp,
|
|||
return true;
|
||||
}
|
||||
|
||||
static inline bool on_task_stack(struct task_struct *tsk, unsigned long sp,
|
||||
struct stack_info *info)
|
||||
static inline bool on_task_stack(const struct task_struct *tsk,
|
||||
unsigned long sp,
|
||||
struct stack_info *info)
|
||||
{
|
||||
unsigned long low = (unsigned long)task_stack_page(tsk);
|
||||
unsigned long high = low + THREAD_SIZE;
|
||||
|
|
@ -112,10 +138,13 @@ static inline bool on_overflow_stack(unsigned long sp,
|
|||
* We can only safely access per-cpu stacks from current in a non-preemptible
|
||||
* context.
|
||||
*/
|
||||
static inline bool on_accessible_stack(struct task_struct *tsk,
|
||||
unsigned long sp,
|
||||
struct stack_info *info)
|
||||
static inline bool on_accessible_stack(const struct task_struct *tsk,
|
||||
unsigned long sp,
|
||||
struct stack_info *info)
|
||||
{
|
||||
if (info)
|
||||
info->type = STACK_TYPE_UNKNOWN;
|
||||
|
||||
if (on_task_stack(tsk, sp, info))
|
||||
return true;
|
||||
if (tsk != current || preemptible())
|
||||
|
|
@ -130,4 +159,27 @@ static inline bool on_accessible_stack(struct task_struct *tsk,
|
|||
return false;
|
||||
}
|
||||
|
||||
static inline void start_backtrace(struct stackframe *frame,
|
||||
unsigned long fp, unsigned long pc)
|
||||
{
|
||||
frame->fp = fp;
|
||||
frame->pc = pc;
|
||||
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
||||
frame->graph = 0;
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Prime the first unwind.
|
||||
*
|
||||
* In unwind_frame() we'll check that the FP points to a valid stack,
|
||||
* which can't be STACK_TYPE_UNKNOWN, and the first unwind will be
|
||||
* treated as a transition to whichever stack that happens to be. The
|
||||
* prev_fp value won't be used, but we set it to 0 such that it is
|
||||
* definitely not an accessible stack address.
|
||||
*/
|
||||
bitmap_zero(frame->stacks_done, __NR_STACK_TYPES);
|
||||
frame->prev_fp = 0;
|
||||
frame->prev_type = STACK_TYPE_UNKNOWN;
|
||||
}
|
||||
|
||||
#endif /* __ASM_STACKTRACE_H */
|
||||
|
|
|
|||
|
|
@ -586,10 +586,8 @@ el1_sync:
|
|||
b.eq el1_ia
|
||||
cmp x24, #ESR_ELx_EC_SYS64 // configurable trap
|
||||
b.eq el1_undef
|
||||
cmp x24, #ESR_ELx_EC_SP_ALIGN // stack alignment exception
|
||||
b.eq el1_sp_pc
|
||||
cmp x24, #ESR_ELx_EC_PC_ALIGN // pc alignment exception
|
||||
b.eq el1_sp_pc
|
||||
b.eq el1_pc
|
||||
cmp x24, #ESR_ELx_EC_UNKNOWN // unknown exception in EL1
|
||||
b.eq el1_undef
|
||||
cmp x24, #ESR_ELx_EC_BREAKPT_CUR // debug exception in EL1
|
||||
|
|
@ -611,9 +609,11 @@ el1_da:
|
|||
bl do_mem_abort
|
||||
|
||||
kernel_exit 1
|
||||
el1_sp_pc:
|
||||
el1_pc:
|
||||
/*
|
||||
* Stack or PC alignment exception handling
|
||||
* PC alignment exception handling. We don't handle SP alignment faults,
|
||||
* since we will have hit a recursive exception when trying to push the
|
||||
* initial pt_regs.
|
||||
*/
|
||||
mrs x0, far_el1
|
||||
inherit_daif pstate=x23, tmp=x2
|
||||
|
|
@ -732,9 +732,9 @@ el0_sync:
|
|||
ccmp x24, #ESR_ELx_EC_WFx, #4, ne
|
||||
b.eq el0_sys
|
||||
cmp x24, #ESR_ELx_EC_SP_ALIGN // stack alignment exception
|
||||
b.eq el0_sp_pc
|
||||
b.eq el0_sp
|
||||
cmp x24, #ESR_ELx_EC_PC_ALIGN // pc alignment exception
|
||||
b.eq el0_sp_pc
|
||||
b.eq el0_pc
|
||||
cmp x24, #ESR_ELx_EC_UNKNOWN // unknown exception in EL0
|
||||
b.eq el0_undef
|
||||
cmp x24, #ESR_ELx_EC_BREAKPT_LOW // debug exception in EL0
|
||||
|
|
@ -758,7 +758,7 @@ el0_sync_compat:
|
|||
cmp x24, #ESR_ELx_EC_FP_EXC32 // FP/ASIMD exception
|
||||
b.eq el0_fpsimd_exc
|
||||
cmp x24, #ESR_ELx_EC_PC_ALIGN // pc alignment exception
|
||||
b.eq el0_sp_pc
|
||||
b.eq el0_pc
|
||||
cmp x24, #ESR_ELx_EC_UNKNOWN // unknown exception in EL0
|
||||
b.eq el0_undef
|
||||
cmp x24, #ESR_ELx_EC_CP15_32 // CP15 MRC/MCR trap
|
||||
|
|
@ -858,11 +858,15 @@ el0_fpsimd_exc:
|
|||
mov x1, sp
|
||||
bl do_fpsimd_exc
|
||||
b ret_to_user
|
||||
el0_sp:
|
||||
ldr x26, [sp, #S_SP]
|
||||
b el0_sp_pc
|
||||
el0_pc:
|
||||
mrs x26, far_el1
|
||||
el0_sp_pc:
|
||||
/*
|
||||
* Stack or PC alignment exception handling
|
||||
*/
|
||||
mrs x26, far_el1
|
||||
gic_prio_kentry_setup tmp=x0
|
||||
enable_da_f
|
||||
#ifdef CONFIG_TRACE_IRQFLAGS
|
||||
|
|
|
|||
|
|
@ -406,6 +406,18 @@ static __uint128_t arm64_cpu_to_le128(__uint128_t x)
|
|||
|
||||
#define arm64_le128_to_cpu(x) arm64_cpu_to_le128(x)
|
||||
|
||||
static void __fpsimd_to_sve(void *sst, struct user_fpsimd_state const *fst,
|
||||
unsigned int vq)
|
||||
{
|
||||
unsigned int i;
|
||||
__uint128_t *p;
|
||||
|
||||
for (i = 0; i < SVE_NUM_ZREGS; ++i) {
|
||||
p = (__uint128_t *)ZREG(sst, vq, i);
|
||||
*p = arm64_cpu_to_le128(fst->vregs[i]);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Transfer the FPSIMD state in task->thread.uw.fpsimd_state to
|
||||
* task->thread.sve_state.
|
||||
|
|
@ -423,17 +435,12 @@ static void fpsimd_to_sve(struct task_struct *task)
|
|||
unsigned int vq;
|
||||
void *sst = task->thread.sve_state;
|
||||
struct user_fpsimd_state const *fst = &task->thread.uw.fpsimd_state;
|
||||
unsigned int i;
|
||||
__uint128_t *p;
|
||||
|
||||
if (!system_supports_sve())
|
||||
return;
|
||||
|
||||
vq = sve_vq_from_vl(task->thread.sve_vl);
|
||||
for (i = 0; i < 32; ++i) {
|
||||
p = (__uint128_t *)ZREG(sst, vq, i);
|
||||
*p = arm64_cpu_to_le128(fst->vregs[i]);
|
||||
}
|
||||
__fpsimd_to_sve(sst, fst, vq);
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -459,7 +466,7 @@ static void sve_to_fpsimd(struct task_struct *task)
|
|||
return;
|
||||
|
||||
vq = sve_vq_from_vl(task->thread.sve_vl);
|
||||
for (i = 0; i < 32; ++i) {
|
||||
for (i = 0; i < SVE_NUM_ZREGS; ++i) {
|
||||
p = (__uint128_t const *)ZREG(sst, vq, i);
|
||||
fst->vregs[i] = arm64_le128_to_cpu(*p);
|
||||
}
|
||||
|
|
@ -550,8 +557,6 @@ void sve_sync_from_fpsimd_zeropad(struct task_struct *task)
|
|||
unsigned int vq;
|
||||
void *sst = task->thread.sve_state;
|
||||
struct user_fpsimd_state const *fst = &task->thread.uw.fpsimd_state;
|
||||
unsigned int i;
|
||||
__uint128_t *p;
|
||||
|
||||
if (!test_tsk_thread_flag(task, TIF_SVE))
|
||||
return;
|
||||
|
|
@ -559,11 +564,7 @@ void sve_sync_from_fpsimd_zeropad(struct task_struct *task)
|
|||
vq = sve_vq_from_vl(task->thread.sve_vl);
|
||||
|
||||
memset(sst, 0, SVE_SIG_REGS_SIZE(vq));
|
||||
|
||||
for (i = 0; i < 32; ++i) {
|
||||
p = (__uint128_t *)ZREG(sst, vq, i);
|
||||
*p = arm64_cpu_to_le128(fst->vregs[i]);
|
||||
}
|
||||
__fpsimd_to_sve(sst, fst, vq);
|
||||
}
|
||||
|
||||
int sve_set_vector_length(struct task_struct *task,
|
||||
|
|
|
|||
|
|
@ -154,12 +154,7 @@ void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry,
|
|||
return;
|
||||
}
|
||||
|
||||
frame.fp = regs->regs[29];
|
||||
frame.pc = regs->pc;
|
||||
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
||||
frame.graph = 0;
|
||||
#endif
|
||||
|
||||
start_backtrace(&frame, regs->regs[29], regs->pc);
|
||||
walk_stackframe(current, &frame, callchain_trace, entry);
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -398,7 +398,7 @@ int copy_thread(unsigned long clone_flags, unsigned long stack_start,
|
|||
childregs->pstate |= PSR_UAO_BIT;
|
||||
|
||||
if (arm64_get_ssbd_state() == ARM64_SSBD_FORCE_DISABLE)
|
||||
childregs->pstate |= PSR_SSBS_BIT;
|
||||
set_ssbs_bit(childregs);
|
||||
|
||||
if (system_uses_irq_prio_masking())
|
||||
childregs->pmr_save = GIC_PRIO_IRQON;
|
||||
|
|
@ -442,6 +442,32 @@ void uao_thread_switch(struct task_struct *next)
|
|||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Force SSBS state on context-switch, since it may be lost after migrating
|
||||
* from a CPU which treats the bit as RES0 in a heterogeneous system.
|
||||
*/
|
||||
static void ssbs_thread_switch(struct task_struct *next)
|
||||
{
|
||||
struct pt_regs *regs = task_pt_regs(next);
|
||||
|
||||
/*
|
||||
* Nothing to do for kernel threads, but 'regs' may be junk
|
||||
* (e.g. idle task) so check the flags and bail early.
|
||||
*/
|
||||
if (unlikely(next->flags & PF_KTHREAD))
|
||||
return;
|
||||
|
||||
/* If the mitigation is enabled, then we leave SSBS clear. */
|
||||
if ((arm64_get_ssbd_state() == ARM64_SSBD_FORCE_ENABLE) ||
|
||||
test_tsk_thread_flag(next, TIF_SSBD))
|
||||
return;
|
||||
|
||||
if (compat_user_mode(regs))
|
||||
set_compat_ssbs_bit(regs);
|
||||
else if (user_mode(regs))
|
||||
set_ssbs_bit(regs);
|
||||
}
|
||||
|
||||
/*
|
||||
* We store our current task in sp_el0, which is clobbered by userspace. Keep a
|
||||
* shadow copy so that we can restore this upon entry from userspace.
|
||||
|
|
@ -471,6 +497,7 @@ __notrace_funcgraph struct task_struct *__switch_to(struct task_struct *prev,
|
|||
entry_task_switch(next);
|
||||
uao_thread_switch(next);
|
||||
ptrauth_thread_switch(next);
|
||||
ssbs_thread_switch(next);
|
||||
|
||||
/*
|
||||
* Complete any pending TLB or cache maintenance on this CPU in case
|
||||
|
|
@ -498,11 +525,8 @@ unsigned long get_wchan(struct task_struct *p)
|
|||
if (!stack_page)
|
||||
return 0;
|
||||
|
||||
frame.fp = thread_saved_fp(p);
|
||||
frame.pc = thread_saved_pc(p);
|
||||
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
||||
frame.graph = 0;
|
||||
#endif
|
||||
start_backtrace(&frame, thread_saved_fp(p), thread_saved_pc(p));
|
||||
|
||||
do {
|
||||
if (unwind_frame(p, &frame))
|
||||
goto out;
|
||||
|
|
|
|||
|
|
@ -38,12 +38,9 @@ void *return_address(unsigned int level)
|
|||
data.level = level + 2;
|
||||
data.addr = NULL;
|
||||
|
||||
frame.fp = (unsigned long)__builtin_frame_address(0);
|
||||
frame.pc = (unsigned long)return_address; /* dummy */
|
||||
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
||||
frame.graph = 0;
|
||||
#endif
|
||||
|
||||
start_backtrace(&frame,
|
||||
(unsigned long)__builtin_frame_address(0),
|
||||
(unsigned long)return_address);
|
||||
walk_stackframe(current, &frame, save_return_addr, &data);
|
||||
|
||||
if (!data.level)
|
||||
|
|
|
|||
|
|
@ -29,9 +29,18 @@
|
|||
* ldp x29, x30, [sp]
|
||||
* add sp, sp, #0x10
|
||||
*/
|
||||
|
||||
/*
|
||||
* Unwind from one frame record (A) to the next frame record (B).
|
||||
*
|
||||
* We terminate early if the location of B indicates a malformed chain of frame
|
||||
* records (e.g. a cycle), determined based on the location and fp value of A
|
||||
* and the location (but not the fp value) of B.
|
||||
*/
|
||||
int notrace unwind_frame(struct task_struct *tsk, struct stackframe *frame)
|
||||
{
|
||||
unsigned long fp = frame->fp;
|
||||
struct stack_info info;
|
||||
|
||||
if (fp & 0xf)
|
||||
return -EINVAL;
|
||||
|
|
@ -39,11 +48,40 @@ int notrace unwind_frame(struct task_struct *tsk, struct stackframe *frame)
|
|||
if (!tsk)
|
||||
tsk = current;
|
||||
|
||||
if (!on_accessible_stack(tsk, fp, NULL))
|
||||
if (!on_accessible_stack(tsk, fp, &info))
|
||||
return -EINVAL;
|
||||
|
||||
if (test_bit(info.type, frame->stacks_done))
|
||||
return -EINVAL;
|
||||
|
||||
/*
|
||||
* As stacks grow downward, any valid record on the same stack must be
|
||||
* at a strictly higher address than the prior record.
|
||||
*
|
||||
* Stacks can nest in several valid orders, e.g.
|
||||
*
|
||||
* TASK -> IRQ -> OVERFLOW -> SDEI_NORMAL
|
||||
* TASK -> SDEI_NORMAL -> SDEI_CRITICAL -> OVERFLOW
|
||||
*
|
||||
* ... but the nesting itself is strict. Once we transition from one
|
||||
* stack to another, it's never valid to unwind back to that first
|
||||
* stack.
|
||||
*/
|
||||
if (info.type == frame->prev_type) {
|
||||
if (fp <= frame->prev_fp)
|
||||
return -EINVAL;
|
||||
} else {
|
||||
set_bit(frame->prev_type, frame->stacks_done);
|
||||
}
|
||||
|
||||
/*
|
||||
* Record this frame record's values and location. The prev_fp and
|
||||
* prev_type are only meaningful to the next unwind_frame() invocation.
|
||||
*/
|
||||
frame->fp = READ_ONCE_NOCHECK(*(unsigned long *)(fp));
|
||||
frame->pc = READ_ONCE_NOCHECK(*(unsigned long *)(fp + 8));
|
||||
frame->prev_fp = fp;
|
||||
frame->prev_type = info.type;
|
||||
|
||||
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
||||
if (tsk->ret_stack &&
|
||||
|
|
@ -122,12 +160,7 @@ void save_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace)
|
|||
data.skip = trace->skip;
|
||||
data.no_sched_functions = 0;
|
||||
|
||||
frame.fp = regs->regs[29];
|
||||
frame.pc = regs->pc;
|
||||
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
||||
frame.graph = 0;
|
||||
#endif
|
||||
|
||||
start_backtrace(&frame, regs->regs[29], regs->pc);
|
||||
walk_stackframe(current, &frame, save_trace, &data);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(save_stack_trace_regs);
|
||||
|
|
@ -146,17 +179,15 @@ static noinline void __save_stack_trace(struct task_struct *tsk,
|
|||
data.no_sched_functions = nosched;
|
||||
|
||||
if (tsk != current) {
|
||||
frame.fp = thread_saved_fp(tsk);
|
||||
frame.pc = thread_saved_pc(tsk);
|
||||
start_backtrace(&frame, thread_saved_fp(tsk),
|
||||
thread_saved_pc(tsk));
|
||||
} else {
|
||||
/* We don't want this function nor the caller */
|
||||
data.skip += 2;
|
||||
frame.fp = (unsigned long)__builtin_frame_address(0);
|
||||
frame.pc = (unsigned long)__save_stack_trace;
|
||||
start_backtrace(&frame,
|
||||
(unsigned long)__builtin_frame_address(0),
|
||||
(unsigned long)__save_stack_trace);
|
||||
}
|
||||
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
||||
frame.graph = 0;
|
||||
#endif
|
||||
|
||||
walk_stackframe(tsk, &frame, save_trace, &data);
|
||||
|
||||
|
|
|
|||
|
|
@ -38,11 +38,8 @@ unsigned long profile_pc(struct pt_regs *regs)
|
|||
if (!in_lock_functions(regs->pc))
|
||||
return regs->pc;
|
||||
|
||||
frame.fp = regs->regs[29];
|
||||
frame.pc = regs->pc;
|
||||
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
||||
frame.graph = 0;
|
||||
#endif
|
||||
start_backtrace(&frame, regs->regs[29], regs->pc);
|
||||
|
||||
do {
|
||||
int ret = unwind_frame(NULL, &frame);
|
||||
if (ret < 0)
|
||||
|
|
|
|||
|
|
@ -100,18 +100,17 @@ void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
|
|||
return;
|
||||
|
||||
if (tsk == current) {
|
||||
frame.fp = (unsigned long)__builtin_frame_address(0);
|
||||
frame.pc = (unsigned long)dump_backtrace;
|
||||
start_backtrace(&frame,
|
||||
(unsigned long)__builtin_frame_address(0),
|
||||
(unsigned long)dump_backtrace);
|
||||
} else {
|
||||
/*
|
||||
* task blocked in __switch_to
|
||||
*/
|
||||
frame.fp = thread_saved_fp(tsk);
|
||||
frame.pc = thread_saved_pc(tsk);
|
||||
start_backtrace(&frame,
|
||||
thread_saved_fp(tsk),
|
||||
thread_saved_pc(tsk));
|
||||
}
|
||||
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
||||
frame.graph = 0;
|
||||
#endif
|
||||
|
||||
printk("Call trace:\n");
|
||||
do {
|
||||
|
|
|
|||
|
|
@ -32,10 +32,10 @@ UBSAN_SANITIZE := n
|
|||
OBJECT_FILES_NON_STANDARD := y
|
||||
KCOV_INSTRUMENT := n
|
||||
|
||||
ifeq ($(c-gettimeofday-y),)
|
||||
CFLAGS_vgettimeofday.o = -O2 -mcmodel=tiny
|
||||
else
|
||||
CFLAGS_vgettimeofday.o = -O2 -mcmodel=tiny -include $(c-gettimeofday-y)
|
||||
|
||||
ifneq ($(c-gettimeofday-y),)
|
||||
CFLAGS_vgettimeofday.o += -include $(c-gettimeofday-y)
|
||||
endif
|
||||
|
||||
# Clang versions less than 8 do not support -mcmodel=tiny
|
||||
|
|
@ -57,8 +57,7 @@ $(obj)/vdso.o : $(obj)/vdso.so
|
|||
|
||||
# Link rule for the .so file, .lds has to be first
|
||||
$(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso) FORCE
|
||||
$(call if_changed,ld)
|
||||
$(call if_changed,vdso_check)
|
||||
$(call if_changed,vdsold_and_vdso_check)
|
||||
|
||||
# Strip rule for the .so file
|
||||
$(obj)/%.so: OBJCOPYFLAGS := -S
|
||||
|
|
@ -74,8 +73,8 @@ include/generated/vdso-offsets.h: $(obj)/vdso.so.dbg FORCE
|
|||
$(call if_changed,vdsosym)
|
||||
|
||||
# Actual build commands
|
||||
quiet_cmd_vdsocc = VDSOCC $@
|
||||
cmd_vdsocc = $(CC) $(a_flags) $(c_flags) -c -o $@ $<
|
||||
quiet_cmd_vdsold_and_vdso_check = LD $@
|
||||
cmd_vdsold_and_vdso_check = $(cmd_ld); $(cmd_vdso_check)
|
||||
|
||||
# Install commands for the unstripped file
|
||||
quiet_cmd_vdso_install = INSTALL $@
|
||||
|
|
|
|||
|
|
@ -144,8 +144,7 @@ $(obj)/vdso.so.dbg: $(obj)/vdso.so.raw $(obj)/$(munge) FORCE
|
|||
|
||||
# Link rule for the .so file, .lds has to be first
|
||||
$(obj)/vdso.so.raw: $(src)/vdso.lds $(obj-vdso) FORCE
|
||||
$(call if_changed,vdsold)
|
||||
$(call if_changed,vdso_check)
|
||||
$(call if_changed,vdsold_and_vdso_check)
|
||||
|
||||
# Compilation rules for the vDSO sources
|
||||
$(c-obj-vdso): %.o: %.c FORCE
|
||||
|
|
@ -156,14 +155,17 @@ $(asm-obj-vdso): %.o: %.S FORCE
|
|||
$(call if_changed_dep,vdsoas)
|
||||
|
||||
# Actual build commands
|
||||
quiet_cmd_vdsold = VDSOL $@
|
||||
quiet_cmd_vdsold_and_vdso_check = LD32 $@
|
||||
cmd_vdsold_and_vdso_check = $(cmd_vdsold); $(cmd_vdso_check)
|
||||
|
||||
quiet_cmd_vdsold = LD32 $@
|
||||
cmd_vdsold = $(COMPATCC) -Wp,-MD,$(depfile) $(VDSO_LDFLAGS) \
|
||||
-Wl,-T $(filter %.lds,$^) $(filter %.o,$^) -o $@
|
||||
quiet_cmd_vdsocc = VDSOC $@
|
||||
quiet_cmd_vdsocc = CC32 $@
|
||||
cmd_vdsocc = $(COMPATCC) -Wp,-MD,$(depfile) $(VDSO_CFLAGS) -c -o $@ $<
|
||||
quiet_cmd_vdsocc_gettimeofday = VDSOC_GTD $@
|
||||
quiet_cmd_vdsocc_gettimeofday = CC32 $@
|
||||
cmd_vdsocc_gettimeofday = $(COMPATCC) -Wp,-MD,$(depfile) $(VDSO_CFLAGS) $(VDSO_CFLAGS_gettimeofday_o) -c -o $@ $<
|
||||
quiet_cmd_vdsoas = VDSOA $@
|
||||
quiet_cmd_vdsoas = AS32 $@
|
||||
cmd_vdsoas = $(COMPATCC) -Wp,-MD,$(depfile) $(VDSO_AFLAGS) -c -o $@ $<
|
||||
|
||||
quiet_cmd_vdsomunge = MUNGE $@
|
||||
|
|
|
|||
|
|
@ -611,8 +611,8 @@ static int iort_dev_find_its_id(struct device *dev, u32 req_id,
|
|||
|
||||
/* Move to ITS specific data */
|
||||
its = (struct acpi_iort_its_group *)node->node_data;
|
||||
if (idx > its->its_count) {
|
||||
dev_err(dev, "requested ITS ID index [%d] is greater than available [%d]\n",
|
||||
if (idx >= its->its_count) {
|
||||
dev_err(dev, "requested ITS ID index [%d] overruns ITS entries [%d]\n",
|
||||
idx, its->its_count);
|
||||
return -ENXIO;
|
||||
}
|
||||
|
|
|
|||
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