xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

x86/acrn: Use HYPERVISOR_CALLBACK_VECTOR for ACRN guest upcall vector

Browse Source 
Use the HYPERVISOR_CALLBACK_VECTOR to notify an ACRN guest.

Co-developed-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/1559108037-18813-4-git-send-email-yakui.zhao@intel.com
This commit is contained in:
Zhao Yakui
2019-04-30 11:45:25 +08:00
committed by Borislav Petkov
parent ec7972c99f
commit 498ad39368
4 changed files with 47 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
arch/x86/kernel/cpu/acrn.c
View File

@@ -9,7 +9,12 @@
*
*/
#include <linux/interrupt.h>
#include <asm/acrn.h>
#include <asm/apic.h>
#include <asm/desc.h>
#include <asm/hypervisor.h>
#include <asm/irq_regs.h>
static uint32_t __init acrn_detect(void)
{
@@ -18,6 +23,8 @@ static uint32_t __init acrn_detect(void)
static void __init acrn_init_platform(void)
{
/* Setup the IDT for ACRN hypervisor callback */
alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, acrn_hv_callback_vector);
}
static bool acrn_x2apic_available(void)
@@ -30,6 +37,29 @@ static bool acrn_x2apic_available(void)
return false;
}
static void (*acrn_intr_handler)(void);
__visible void __irq_entry acrn_hv_vector_handler(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
/*
* The hypervisor requires that the APIC EOI should be acked.
* If the APIC EOI is not acked, the APIC ISR bit for the
* HYPERVISOR_CALLBACK_VECTOR will not be cleared and then it
* will block the interrupt whose vector is lower than
* HYPERVISOR_CALLBACK_VECTOR.
*/
entering_ack_irq();
inc_irq_stat(irq_hv_callback_count);
if (acrn_intr_handler)
acrn_intr_handler();
exiting_irq();
set_irq_regs(old_regs);
}
const __initconst struct hypervisor_x86 x86_hyper_acrn = {
.name = "ACRN",
.detect = acrn_detect,