summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2023-07-21 10:24:21 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2023-07-21 10:24:21 -0700
commitd192f5382581d972c4ae1b4d72e0b59b34cadeb9 (patch)
tree4ce9830080abe9b7dfaee788e2f45e8e7776d560
parent892d7c1b29555cd145f0bf85818148c47bb7ac16 (diff)
parentd4d5be94a87872421ea2569044092535aff0b886 (diff)
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon: "I've picked up a handful of arm64 fixes while Catalin's been away, so here they are. Below is the usual summary, but we have basically have two cleanups, a fix for an SME crash and a fix for hibernation: - Fix saving of SME state after SVE vector length is changed - Fix sparse warnings for missing vDSO function prototypes - Fix hibernation resume path when kfence is enabled - Fix field names for the HFGxTR_EL2 register" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64/fpsimd: Ensure SME storage is allocated after SVE VL changes arm64: vdso: Clear common make C=2 warnings arm64: mm: Make hibernation aware of KFENCE arm64: Fix HFGxTR_EL2 field naming
-rw-r--r--arch/arm64/kernel/fpsimd.c33
-rw-r--r--arch/arm64/kernel/vdso/vgettimeofday.c4
-rw-r--r--arch/arm64/mm/trans_pgd.c4
-rw-r--r--arch/arm64/tools/sysreg12
4 files changed, 38 insertions, 15 deletions
diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c
index 7a1aeb95d7c3..89d54a5242d1 100644
--- a/arch/arm64/kernel/fpsimd.c
+++ b/arch/arm64/kernel/fpsimd.c
@@ -847,6 +847,8 @@ void sve_sync_from_fpsimd_zeropad(struct task_struct *task)
int vec_set_vector_length(struct task_struct *task, enum vec_type type,
unsigned long vl, unsigned long flags)
{
+ bool free_sme = false;
+
if (flags & ~(unsigned long)(PR_SVE_VL_INHERIT |
PR_SVE_SET_VL_ONEXEC))
return -EINVAL;
@@ -897,21 +899,36 @@ int vec_set_vector_length(struct task_struct *task, enum vec_type type,
task->thread.fp_type = FP_STATE_FPSIMD;
}
- if (system_supports_sme() && type == ARM64_VEC_SME) {
- task->thread.svcr &= ~(SVCR_SM_MASK |
- SVCR_ZA_MASK);
- clear_thread_flag(TIF_SME);
+ if (system_supports_sme()) {
+ if (type == ARM64_VEC_SME ||
+ !(task->thread.svcr & (SVCR_SM_MASK | SVCR_ZA_MASK))) {
+ /*
+ * We are changing the SME VL or weren't using
+ * SME anyway, discard the state and force a
+ * reallocation.
+ */
+ task->thread.svcr &= ~(SVCR_SM_MASK |
+ SVCR_ZA_MASK);
+ clear_thread_flag(TIF_SME);
+ free_sme = true;
+ }
}
if (task == current)
put_cpu_fpsimd_context();
/*
- * Force reallocation of task SVE and SME state to the correct
- * size on next use:
+ * Free the changed states if they are not in use, SME will be
+ * reallocated to the correct size on next use and we just
+ * allocate SVE now in case it is needed for use in streaming
+ * mode.
*/
- sve_free(task);
- if (system_supports_sme() && type == ARM64_VEC_SME)
+ if (system_supports_sve()) {
+ sve_free(task);
+ sve_alloc(task, true);
+ }
+
+ if (free_sme)
sme_free(task);
task_set_vl(task, type, vl);
diff --git a/arch/arm64/kernel/vdso/vgettimeofday.c b/arch/arm64/kernel/vdso/vgettimeofday.c
index 4236cf34d7d9..9941c5b04f15 100644
--- a/arch/arm64/kernel/vdso/vgettimeofday.c
+++ b/arch/arm64/kernel/vdso/vgettimeofday.c
@@ -6,6 +6,10 @@
*
*/
+int __kernel_clock_gettime(clockid_t clock, struct __kernel_timespec *ts);
+int __kernel_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz);
+int __kernel_clock_getres(clockid_t clock_id, struct __kernel_timespec *res);
+
int __kernel_clock_gettime(clockid_t clock,
struct __kernel_timespec *ts)
{
diff --git a/arch/arm64/mm/trans_pgd.c b/arch/arm64/mm/trans_pgd.c
index 4ea2eefbc053..e9ad391fc8ea 100644
--- a/arch/arm64/mm/trans_pgd.c
+++ b/arch/arm64/mm/trans_pgd.c
@@ -24,6 +24,7 @@
#include <linux/bug.h>
#include <linux/mm.h>
#include <linux/mmzone.h>
+#include <linux/kfence.h>
static void *trans_alloc(struct trans_pgd_info *info)
{
@@ -41,7 +42,8 @@ static void _copy_pte(pte_t *dst_ptep, pte_t *src_ptep, unsigned long addr)
* the temporary mappings we use during restore.
*/
set_pte(dst_ptep, pte_mkwrite(pte));
- } else if (debug_pagealloc_enabled() && !pte_none(pte)) {
+ } else if ((debug_pagealloc_enabled() ||
+ is_kfence_address((void *)addr)) && !pte_none(pte)) {
/*
* debug_pagealloc will removed the PTE_VALID bit if
* the page isn't in use by the resume kernel. It may have
diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg
index 1ea4a3dc68f8..65866bf819c3 100644
--- a/arch/arm64/tools/sysreg
+++ b/arch/arm64/tools/sysreg
@@ -2017,7 +2017,7 @@ Field 0 SM
EndSysreg
SysregFields HFGxTR_EL2
-Field 63 nAMIAIR2_EL1
+Field 63 nAMAIR2_EL1
Field 62 nMAIR2_EL1
Field 61 nS2POR_EL1
Field 60 nPOR_EL1
@@ -2032,9 +2032,9 @@ Field 52 nGCS_EL0
Res0 51
Field 50 nACCDATA_EL1
Field 49 ERXADDR_EL1
-Field 48 EXRPFGCDN_EL1
-Field 47 EXPFGCTL_EL1
-Field 46 EXPFGF_EL1
+Field 48 ERXPFGCDN_EL1
+Field 47 ERXPFGCTL_EL1
+Field 46 ERXPFGF_EL1
Field 45 ERXMISCn_EL1
Field 44 ERXSTATUS_EL1
Field 43 ERXCTLR_EL1
@@ -2049,8 +2049,8 @@ Field 35 TPIDR_EL0
Field 34 TPIDRRO_EL0
Field 33 TPIDR_EL1
Field 32 TCR_EL1
-Field 31 SCTXNUM_EL0
-Field 30 SCTXNUM_EL1
+Field 31 SCXTNUM_EL0
+Field 30 SCXTNUM_EL1
Field 29 SCTLR_EL1
Field 28 REVIDR_EL1
Field 27 PAR_EL1