aboutsummaryrefslogtreecommitdiffstats
path: root/arch
diff options
context:
space:
mode:
authorThomas Gleixner <tglx@linutronix.de>2020-05-21 22:05:44 +0200
committerThomas Gleixner <tglx@linutronix.de>2020-06-11 15:15:15 +0200
commitcb09ea2924cbf1a42da59bd30a59cc1836240bcb (patch)
tree1ed2f628b2a16311f7c772c94719b0395653014d /arch
parenta16be368dd3fb695077cc9bc59c988b548955eec (diff)
x86/entry: Convert XEN hypercall vector to IDTENTRY_SYSVEC
Convert the last oldstyle defined vector to IDTENTRY_SYSVEC: - Implement the C entry point with DEFINE_IDTENTRY_SYSVEC - Emit the ASM stub with DECLARE_IDTENTRY_SYSVEC - Remove the ASM idtentries in 64-bit - Remove the BUILD_INTERRUPT entries in 32-bit - Remove the old prototypes Fixup the related XEN code by providing the primary C entry point in x86 to avoid cluttering the generic code with X86'isms. No functional change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Andy Lutomirski <luto@kernel.org> Link: https://lore.kernel.org/r/20200521202119.741950104@linutronix.de
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/entry/entry_32.S5
-rw-r--r--arch/x86/entry/entry_64.S5
-rw-r--r--arch/x86/include/asm/idtentry.h4
-rw-r--r--arch/x86/xen/enlighten_hvm.c12
4 files changed, 16 insertions, 10 deletions
diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S
index bb9ebd2df05e..f8e8aeb10ba4 100644
--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -1340,11 +1340,6 @@ SYM_FUNC_START(xen_failsafe_callback)
SYM_FUNC_END(xen_failsafe_callback)
#endif /* CONFIG_XEN_PV */
-#ifdef CONFIG_XEN_PVHVM
-BUILD_INTERRUPT3(xen_hvm_callback_vector, HYPERVISOR_CALLBACK_VECTOR,
- xen_evtchn_do_upcall)
-#endif
-
SYM_CODE_START_LOCAL_NOALIGN(handle_exception)
/* the function address is in %gs's slot on the stack */
SAVE_ALL switch_stacks=1 skip_gs=1 unwind_espfix=1
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S
index b97fcda28019..fd7efb8deded 100644
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -1111,11 +1111,6 @@ SYM_CODE_START(xen_failsafe_callback)
SYM_CODE_END(xen_failsafe_callback)
#endif /* CONFIG_XEN_PV */
-#ifdef CONFIG_XEN_PVHVM
-apicinterrupt3 HYPERVISOR_CALLBACK_VECTOR \
- xen_hvm_callback_vector xen_evtchn_do_upcall
-#endif
-
/*
* Save all registers in pt_regs, and switch gs if needed.
* Use slow, but surefire "are we in kernel?" check.
diff --git a/arch/x86/include/asm/idtentry.h b/arch/x86/include/asm/idtentry.h
index 1b6d3ea1fc96..71cf82bf24ba 100644
--- a/arch/x86/include/asm/idtentry.h
+++ b/arch/x86/include/asm/idtentry.h
@@ -644,6 +644,10 @@ DECLARE_IDTENTRY_SYSVEC(HYPERVISOR_STIMER0_VECTOR, sysvec_hyperv_stimer0);
DECLARE_IDTENTRY_SYSVEC(HYPERVISOR_CALLBACK_VECTOR, sysvec_acrn_hv_callback);
#endif
+#ifdef CONFIG_XEN_PVHVM
+DECLARE_IDTENTRY_SYSVEC(HYPERVISOR_CALLBACK_VECTOR, sysvec_xen_hvm_callback);
+#endif
+
#undef X86_TRAP_OTHER
#endif
diff --git a/arch/x86/xen/enlighten_hvm.c b/arch/x86/xen/enlighten_hvm.c
index e138f7de52d2..3e89b0067ff0 100644
--- a/arch/x86/xen/enlighten_hvm.c
+++ b/arch/x86/xen/enlighten_hvm.c
@@ -13,6 +13,7 @@
#include <asm/smp.h>
#include <asm/reboot.h>
#include <asm/setup.h>
+#include <asm/idtentry.h>
#include <asm/hypervisor.h>
#include <asm/e820/api.h>
#include <asm/early_ioremap.h>
@@ -118,6 +119,17 @@ static void __init init_hvm_pv_info(void)
this_cpu_write(xen_vcpu_id, smp_processor_id());
}
+DEFINE_IDTENTRY_SYSVEC(sysvec_xen_hvm_callback)
+{
+ struct pt_regs *old_regs = set_irq_regs(regs);
+
+ inc_irq_stat(irq_hv_callback_count);
+
+ xen_hvm_evtchn_do_upcall();
+
+ set_irq_regs(old_regs);
+}
+
#ifdef CONFIG_KEXEC_CORE
static void xen_hvm_shutdown(void)
{

Privacy Policy