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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen staging] x86/irq: CFI hardening
commit 287f541c6e0a47904b4ee2908746d2279eceef6d
Author: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Fri Oct 29 18:45:59 2021 +0100
Commit: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Wed Feb 23 15:33:43 2022 +0000
x86/irq: CFI hardening
Control Flow Integrity schemes use toolchain and optionally hardware support
to help protect against call/jump/return oriented programming attacks.
Use cf_check to annotate function pointer targets for the toolchain.
Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
xen/arch/x86/hpet.c | 11 ++++++-----
xen/arch/x86/i8259.c | 10 +++++-----
xen/arch/x86/include/asm/irq.h | 8 ++++----
xen/arch/x86/include/asm/msi.h | 8 ++++----
xen/arch/x86/io_apic.c | 24 ++++++++++++------------
xen/arch/x86/irq.c | 6 +++---
xen/arch/x86/msi.c | 14 +++++++-------
xen/common/irq.c | 6 +++---
xen/drivers/passthrough/amd/iommu_init.c | 15 ++++++++-------
xen/drivers/passthrough/vtd/iommu.c | 13 +++++++------
xen/include/xen/irq.h | 6 +++---
11 files changed, 62 insertions(+), 59 deletions(-)
diff --git a/xen/arch/x86/hpet.c b/xen/arch/x86/hpet.c
index 1632993f72..19cab52587 100644
--- a/xen/arch/x86/hpet.c
+++ b/xen/arch/x86/hpet.c
@@ -253,7 +253,7 @@ static void cf_check hpet_interrupt_handler(
ch->event_handler(ch);
}
-static void hpet_msi_unmask(struct irq_desc *desc)
+static void cf_check hpet_msi_unmask(struct irq_desc *desc)
{
u32 cfg;
struct hpet_event_channel *ch = desc->action->dev_id;
@@ -264,7 +264,7 @@ static void hpet_msi_unmask(struct irq_desc *desc)
ch->msi.msi_attrib.host_masked = 0;
}
-static void hpet_msi_mask(struct irq_desc *desc)
+static void cf_check hpet_msi_mask(struct irq_desc *desc)
{
u32 cfg;
struct hpet_event_channel *ch = desc->action->dev_id;
@@ -293,7 +293,7 @@ static int hpet_msi_write(struct hpet_event_channel *ch,
struct msi_msg *msg)
return 0;
}
-static unsigned int hpet_msi_startup(struct irq_desc *desc)
+static unsigned int cf_check hpet_msi_startup(struct irq_desc *desc)
{
hpet_msi_unmask(desc);
return 0;
@@ -301,14 +301,15 @@ static unsigned int hpet_msi_startup(struct irq_desc
*desc)
#define hpet_msi_shutdown hpet_msi_mask
-static void hpet_msi_ack(struct irq_desc *desc)
+static void cf_check hpet_msi_ack(struct irq_desc *desc)
{
irq_complete_move(desc);
move_native_irq(desc);
ack_APIC_irq();
}
-static void hpet_msi_set_affinity(struct irq_desc *desc, const cpumask_t *mask)
+static void cf_check hpet_msi_set_affinity(
+ struct irq_desc *desc, const cpumask_t *mask)
{
struct hpet_event_channel *ch = desc->action->dev_id;
struct msi_msg msg = ch->msi.msg;
diff --git a/xen/arch/x86/i8259.c b/xen/arch/x86/i8259.c
index b389bb2176..6b35be10f0 100644
--- a/xen/arch/x86/i8259.c
+++ b/xen/arch/x86/i8259.c
@@ -40,18 +40,18 @@ bool bogus_8259A_irq(unsigned int irq)
return _mask_and_ack_8259A_irq(irq);
}
-static void mask_and_ack_8259A_irq(struct irq_desc *desc)
+static void cf_check mask_and_ack_8259A_irq(struct irq_desc *desc)
{
_mask_and_ack_8259A_irq(desc->irq);
}
-static unsigned int startup_8259A_irq(struct irq_desc *desc)
+static unsigned int cf_check startup_8259A_irq(struct irq_desc *desc)
{
enable_8259A_irq(desc);
return 0; /* never anything pending */
}
-static void end_8259A_irq(struct irq_desc *desc, u8 vector)
+static void cf_check end_8259A_irq(struct irq_desc *desc, u8 vector)
{
if (!(desc->status & (IRQ_DISABLED|IRQ_INPROGRESS)))
enable_8259A_irq(desc);
@@ -108,12 +108,12 @@ static void _disable_8259A_irq(unsigned int irq)
spin_unlock_irqrestore(&i8259A_lock, flags);
}
-void disable_8259A_irq(struct irq_desc *desc)
+void cf_check disable_8259A_irq(struct irq_desc *desc)
{
_disable_8259A_irq(desc->irq);
}
-void enable_8259A_irq(struct irq_desc *desc)
+void cf_check enable_8259A_irq(struct irq_desc *desc)
{
unsigned int mask = ~(1 << desc->irq);
unsigned long flags;
diff --git a/xen/arch/x86/include/asm/irq.h b/xen/arch/x86/include/asm/irq.h
index b3f49abc55..76e6ed6d60 100644
--- a/xen/arch/x86/include/asm/irq.h
+++ b/xen/arch/x86/include/asm/irq.h
@@ -111,8 +111,8 @@ void alloc_direct_apic_vector(
void do_IRQ(struct cpu_user_regs *regs);
-void disable_8259A_irq(struct irq_desc *);
-void enable_8259A_irq(struct irq_desc *);
+void cf_check disable_8259A_irq(struct irq_desc *);
+void cf_check enable_8259A_irq(struct irq_desc *);
int i8259A_irq_pending(unsigned int irq);
void mask_8259A(void);
void unmask_8259A(void);
@@ -173,7 +173,7 @@ int create_irq(nodeid_t node, bool grant_access);
void destroy_irq(unsigned int irq);
int assign_irq_vector(int irq, const cpumask_t *);
-extern void irq_complete_move(struct irq_desc *);
+void cf_check irq_complete_move(struct irq_desc *);
extern struct irq_desc *irq_desc;
@@ -187,7 +187,7 @@ void move_masked_irq(struct irq_desc *);
int bind_irq_vector(int irq, int vector, const cpumask_t *);
-void end_nonmaskable_irq(struct irq_desc *, uint8_t vector);
+void cf_check end_nonmaskable_irq(struct irq_desc *, uint8_t vector);
void irq_set_affinity(struct irq_desc *, const cpumask_t *mask);
int init_domain_irq_mapping(struct domain *);
diff --git a/xen/arch/x86/include/asm/msi.h b/xen/arch/x86/include/asm/msi.h
index e228b0f3f3..117379318f 100644
--- a/xen/arch/x86/include/asm/msi.h
+++ b/xen/arch/x86/include/asm/msi.h
@@ -247,10 +247,10 @@ void early_msi_init(void);
void msi_compose_msg(unsigned vector, const cpumask_t *mask,
struct msi_msg *msg);
void __msi_set_enable(u16 seg, u8 bus, u8 slot, u8 func, int pos, int enable);
-void mask_msi_irq(struct irq_desc *);
-void unmask_msi_irq(struct irq_desc *);
+void cf_check mask_msi_irq(struct irq_desc *);
+void cf_check unmask_msi_irq(struct irq_desc *);
void guest_mask_msi_irq(struct irq_desc *, bool mask);
-void ack_nonmaskable_msi_irq(struct irq_desc *);
-void set_msi_affinity(struct irq_desc *, const cpumask_t *);
+void cf_check ack_nonmaskable_msi_irq(struct irq_desc *);
+void cf_check set_msi_affinity(struct irq_desc *, const cpumask_t *);
#endif /* __ASM_MSI_H */
diff --git a/xen/arch/x86/io_apic.c b/xen/arch/x86/io_apic.c
index 4c5eaef862..c086f40f63 100644
--- a/xen/arch/x86/io_apic.c
+++ b/xen/arch/x86/io_apic.c
@@ -473,7 +473,7 @@ static void __level_IO_APIC_irq (unsigned int irq)
modify_IO_APIC_irq(irq, IO_APIC_REDIR_LEVEL_TRIGGER, 0);
}
-static void mask_IO_APIC_irq(struct irq_desc *desc)
+static void cf_check mask_IO_APIC_irq(struct irq_desc *desc)
{
unsigned long flags;
@@ -482,7 +482,7 @@ static void mask_IO_APIC_irq(struct irq_desc *desc)
spin_unlock_irqrestore(&ioapic_lock, flags);
}
-static void unmask_IO_APIC_irq(struct irq_desc *desc)
+static void cf_check unmask_IO_APIC_irq(struct irq_desc *desc)
{
unsigned long flags;
@@ -567,7 +567,7 @@ static void clear_IO_APIC (void)
}
}
-static void
+static void cf_check
set_ioapic_affinity_irq(struct irq_desc *desc, const cpumask_t *mask)
{
unsigned int dest;
@@ -1547,7 +1547,7 @@ static int __init timer_irq_works(void)
* This is not complete - we should be able to fake
* an edge even if it isn't on the 8259A...
*/
-static unsigned int startup_edge_ioapic_irq(struct irq_desc *desc)
+static unsigned int cf_check startup_edge_ioapic_irq(struct irq_desc *desc)
{
int was_pending = 0;
unsigned long flags;
@@ -1569,7 +1569,7 @@ static unsigned int startup_edge_ioapic_irq(struct
irq_desc *desc)
* interrupt for real. This prevents IRQ storms from unhandled
* devices.
*/
-static void ack_edge_ioapic_irq(struct irq_desc *desc)
+static void cf_check ack_edge_ioapic_irq(struct irq_desc *desc)
{
irq_complete_move(desc);
move_native_irq(desc);
@@ -1594,7 +1594,7 @@ static void ack_edge_ioapic_irq(struct irq_desc *desc)
* generic IRQ layer and by the fact that an unacked local
* APIC does not accept IRQs.
*/
-static unsigned int startup_level_ioapic_irq(struct irq_desc *desc)
+static unsigned int cf_check startup_level_ioapic_irq(struct irq_desc *desc)
{
unmask_IO_APIC_irq(desc);
@@ -1652,7 +1652,7 @@ static bool io_apic_level_ack_pending(unsigned int irq)
return 0;
}
-static void mask_and_ack_level_ioapic_irq(struct irq_desc *desc)
+static void cf_check mask_and_ack_level_ioapic_irq(struct irq_desc *desc)
{
unsigned long v;
int i;
@@ -1702,7 +1702,7 @@ static void mask_and_ack_level_ioapic_irq(struct irq_desc
*desc)
}
}
-static void end_level_ioapic_irq_old(struct irq_desc *desc, u8 vector)
+static void cf_check end_level_ioapic_irq_old(struct irq_desc *desc, u8 vector)
{
if ( directed_eoi_enabled )
{
@@ -1723,7 +1723,7 @@ static void end_level_ioapic_irq_old(struct irq_desc
*desc, u8 vector)
unmask_IO_APIC_irq(desc);
}
-static void end_level_ioapic_irq_new(struct irq_desc *desc, u8 vector)
+static void cf_check end_level_ioapic_irq_new(struct irq_desc *desc, u8 vector)
{
/*
* It appears there is an erratum which affects at least version 0x11
@@ -1807,7 +1807,7 @@ static inline void init_IO_APIC_traps(void)
make_8259A_irq(irq);
}
-static void enable_lapic_irq(struct irq_desc *desc)
+static void cf_check enable_lapic_irq(struct irq_desc *desc)
{
unsigned long v;
@@ -1815,7 +1815,7 @@ static void enable_lapic_irq(struct irq_desc *desc)
apic_write(APIC_LVT0, v & ~APIC_LVT_MASKED);
}
-static void disable_lapic_irq(struct irq_desc *desc)
+static void cf_check disable_lapic_irq(struct irq_desc *desc)
{
unsigned long v;
@@ -1823,7 +1823,7 @@ static void disable_lapic_irq(struct irq_desc *desc)
apic_write(APIC_LVT0, v | APIC_LVT_MASKED);
}
-static void ack_lapic_irq(struct irq_desc *desc)
+static void cf_check ack_lapic_irq(struct irq_desc *desc)
{
ack_APIC_irq();
}
diff --git a/xen/arch/x86/irq.c b/xen/arch/x86/irq.c
index 61e09a356f..285ac399fb 100644
--- a/xen/arch/x86/irq.c
+++ b/xen/arch/x86/irq.c
@@ -468,7 +468,7 @@ int __init init_irq_data(void)
return 0;
}
-static void ack_none(struct irq_desc *desc)
+static void cf_check ack_none(struct irq_desc *desc)
{
ack_bad_irq(desc->irq);
}
@@ -832,7 +832,7 @@ static void send_cleanup_vector(struct irq_desc *desc)
desc->arch.move_in_progress = 0;
}
-void irq_complete_move(struct irq_desc *desc)
+void cf_check irq_complete_move(struct irq_desc *desc)
{
unsigned vector, me;
@@ -1086,7 +1086,7 @@ bool cpu_has_pending_apic_eoi(void)
return pending_eoi_sp(this_cpu(pending_eoi)) != 0;
}
-void end_nonmaskable_irq(struct irq_desc *desc, uint8_t vector)
+void cf_check end_nonmaskable_irq(struct irq_desc *desc, uint8_t vector)
{
struct pending_eoi *peoi = this_cpu(pending_eoi);
unsigned int sp = pending_eoi_sp(peoi);
diff --git a/xen/arch/x86/msi.c b/xen/arch/x86/msi.c
index 77a4fbf13f..b32b1378f8 100644
--- a/xen/arch/x86/msi.c
+++ b/xen/arch/x86/msi.c
@@ -241,7 +241,7 @@ static int write_msi_msg(struct msi_desc *entry, struct
msi_msg *msg)
return 0;
}
-void set_msi_affinity(struct irq_desc *desc, const cpumask_t *mask)
+void cf_check set_msi_affinity(struct irq_desc *desc, const cpumask_t *mask)
{
struct msi_msg msg;
unsigned int dest;
@@ -416,14 +416,14 @@ static int msi_get_mask_bit(const struct msi_desc *entry)
return -1;
}
-void mask_msi_irq(struct irq_desc *desc)
+void cf_check mask_msi_irq(struct irq_desc *desc)
{
if ( unlikely(!msi_set_mask_bit(desc, 1,
desc->msi_desc->msi_attrib.guest_masked)) )
BUG_ON(!(desc->status & IRQ_DISABLED));
}
-void unmask_msi_irq(struct irq_desc *desc)
+void cf_check unmask_msi_irq(struct irq_desc *desc)
{
if ( unlikely(!msi_set_mask_bit(desc, 0,
desc->msi_desc->msi_attrib.guest_masked)) )
@@ -435,26 +435,26 @@ void guest_mask_msi_irq(struct irq_desc *desc, bool mask)
msi_set_mask_bit(desc, desc->msi_desc->msi_attrib.host_masked, mask);
}
-static unsigned int startup_msi_irq(struct irq_desc *desc)
+static unsigned int cf_check startup_msi_irq(struct irq_desc *desc)
{
if ( unlikely(!msi_set_mask_bit(desc, 0, !!(desc->status & IRQ_GUEST))) )
WARN();
return 0;
}
-static void shutdown_msi_irq(struct irq_desc *desc)
+static void cf_check shutdown_msi_irq(struct irq_desc *desc)
{
if ( unlikely(!msi_set_mask_bit(desc, 1, 1)) )
BUG_ON(!(desc->status & IRQ_DISABLED));
}
-void ack_nonmaskable_msi_irq(struct irq_desc *desc)
+void cf_check ack_nonmaskable_msi_irq(struct irq_desc *desc)
{
irq_complete_move(desc);
move_native_irq(desc);
}
-static void ack_maskable_msi_irq(struct irq_desc *desc)
+static void cf_check ack_maskable_msi_irq(struct irq_desc *desc)
{
ack_nonmaskable_msi_irq(desc);
ack_APIC_irq(); /* ACKTYPE_NONE */
diff --git a/xen/common/irq.c b/xen/common/irq.c
index f42512db33..727cf8bd22 100644
--- a/xen/common/irq.c
+++ b/xen/common/irq.c
@@ -27,15 +27,15 @@ int init_one_irq_desc(struct irq_desc *desc)
return err;
}
-void no_action(int cpl, void *dev_id, struct cpu_user_regs *regs)
+void cf_check no_action(int cpl, void *dev_id, struct cpu_user_regs *regs)
{
}
-void irq_actor_none(struct irq_desc *desc)
+void cf_check irq_actor_none(struct irq_desc *desc)
{
}
-unsigned int irq_startup_none(struct irq_desc *desc)
+unsigned int cf_check irq_startup_none(struct irq_desc *desc)
{
return 0;
}
diff --git a/xen/drivers/passthrough/amd/iommu_init.c
b/xen/drivers/passthrough/amd/iommu_init.c
index d2ad282e93..657c7f619a 100644
--- a/xen/drivers/passthrough/amd/iommu_init.c
+++ b/xen/drivers/passthrough/amd/iommu_init.c
@@ -410,7 +410,7 @@ static void amd_iommu_msi_enable(struct amd_iommu *iommu,
int flag)
PCI_FUNC(iommu->bdf), iommu->msi.msi_attrib.pos, flag);
}
-static void iommu_msi_unmask(struct irq_desc *desc)
+static void cf_check iommu_msi_unmask(struct irq_desc *desc)
{
unsigned long flags;
struct amd_iommu *iommu = desc->action->dev_id;
@@ -421,7 +421,7 @@ static void iommu_msi_unmask(struct irq_desc *desc)
iommu->msi.msi_attrib.host_masked = 0;
}
-static void iommu_msi_mask(struct irq_desc *desc)
+static void cf_check iommu_msi_mask(struct irq_desc *desc)
{
unsigned long flags;
struct amd_iommu *iommu = desc->action->dev_id;
@@ -434,13 +434,13 @@ static void iommu_msi_mask(struct irq_desc *desc)
iommu->msi.msi_attrib.host_masked = 1;
}
-static unsigned int iommu_msi_startup(struct irq_desc *desc)
+static unsigned int cf_check iommu_msi_startup(struct irq_desc *desc)
{
iommu_msi_unmask(desc);
return 0;
}
-static void iommu_msi_end(struct irq_desc *desc, u8 vector)
+static void cf_check iommu_msi_end(struct irq_desc *desc, u8 vector)
{
iommu_msi_unmask(desc);
end_nonmaskable_irq(desc, vector);
@@ -458,14 +458,14 @@ static hw_irq_controller iommu_msi_type = {
.set_affinity = set_msi_affinity,
};
-static unsigned int iommu_maskable_msi_startup(struct irq_desc *desc)
+static unsigned int cf_check iommu_maskable_msi_startup(struct irq_desc *desc)
{
iommu_msi_unmask(desc);
unmask_msi_irq(desc);
return 0;
}
-static void iommu_maskable_msi_shutdown(struct irq_desc *desc)
+static void cf_check iommu_maskable_msi_shutdown(struct irq_desc *desc)
{
mask_msi_irq(desc);
iommu_msi_mask(desc);
@@ -489,7 +489,8 @@ static hw_irq_controller iommu_maskable_msi_type = {
.set_affinity = set_msi_affinity,
};
-static void set_x2apic_affinity(struct irq_desc *desc, const cpumask_t *mask)
+static void cf_check set_x2apic_affinity(
+ struct irq_desc *desc, const cpumask_t *mask)
{
struct amd_iommu *iommu = desc->action->dev_id;
unsigned int dest = set_desc_affinity(desc, mask);
diff --git a/xen/drivers/passthrough/vtd/iommu.c
b/xen/drivers/passthrough/vtd/iommu.c
index f2a5a4b4e4..56968a06a1 100644
--- a/xen/drivers/passthrough/vtd/iommu.c
+++ b/xen/drivers/passthrough/vtd/iommu.c
@@ -1080,7 +1080,7 @@ static void cf_check iommu_page_fault(
tasklet_schedule(&vtd_fault_tasklet);
}
-static void dma_msi_unmask(struct irq_desc *desc)
+static void cf_check dma_msi_unmask(struct irq_desc *desc)
{
struct vtd_iommu *iommu = desc->action->dev_id;
unsigned long flags;
@@ -1095,7 +1095,7 @@ static void dma_msi_unmask(struct irq_desc *desc)
iommu->msi.msi_attrib.host_masked = 0;
}
-static void dma_msi_mask(struct irq_desc *desc)
+static void cf_check dma_msi_mask(struct irq_desc *desc)
{
unsigned long flags;
struct vtd_iommu *iommu = desc->action->dev_id;
@@ -1110,26 +1110,27 @@ static void dma_msi_mask(struct irq_desc *desc)
iommu->msi.msi_attrib.host_masked = 1;
}
-static unsigned int dma_msi_startup(struct irq_desc *desc)
+static unsigned int cf_check dma_msi_startup(struct irq_desc *desc)
{
dma_msi_unmask(desc);
return 0;
}
-static void dma_msi_ack(struct irq_desc *desc)
+static void cf_check dma_msi_ack(struct irq_desc *desc)
{
irq_complete_move(desc);
dma_msi_mask(desc);
move_masked_irq(desc);
}
-static void dma_msi_end(struct irq_desc *desc, u8 vector)
+static void cf_check dma_msi_end(struct irq_desc *desc, u8 vector)
{
dma_msi_unmask(desc);
end_nonmaskable_irq(desc, vector);
}
-static void dma_msi_set_affinity(struct irq_desc *desc, const cpumask_t *mask)
+static void cf_check dma_msi_set_affinity(
+ struct irq_desc *desc, const cpumask_t *mask)
{
struct msi_msg msg;
unsigned int dest;
diff --git a/xen/include/xen/irq.h b/xen/include/xen/irq.h
index 43d567fe44..d8beadd16b 100644
--- a/xen/include/xen/irq.h
+++ b/xen/include/xen/irq.h
@@ -116,9 +116,9 @@ extern int request_irq(unsigned int irq, unsigned int
irqflags,
const char * devname, void *dev_id);
extern hw_irq_controller no_irq_type;
-extern void no_action(int cpl, void *dev_id, struct cpu_user_regs *regs);
-extern unsigned int irq_startup_none(struct irq_desc *);
-extern void irq_actor_none(struct irq_desc *);
+void cf_check no_action(int cpl, void *dev_id, struct cpu_user_regs *regs);
+unsigned int cf_check irq_startup_none(struct irq_desc *);
+void cf_check irq_actor_none(struct irq_desc *);
#define irq_shutdown_none irq_actor_none
#define irq_disable_none irq_actor_none
#define irq_enable_none irq_actor_none
--
generated by git-patchbot for /home/xen/git/xen.git#staging
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