From: Kishon Vijay Abraham I <kvijayab@xxxxxxx>
Secure AVIC has introduced a new field in the APIC backing page
"NmiReq" that has to be set by the guest to request a NMI IPI.
Add support to set NmiReq appropriately to send NMI IPI.
This also requires Virtual NMI feature to be enabled in VINTRL_CTRL
field in the VMSA. However this would be added by a later commit
after adding support for injecting NMI from the hypervisor.
Signed-off-by: Kishon Vijay Abraham I <kvijayab@xxxxxxx>
Signed-off-by: Neeraj Upadhyay <Neeraj.Upadhyay@xxxxxxx>
---
arch/x86/kernel/apic/x2apic_savic.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kernel/apic/x2apic_savic.c b/arch/x86/kernel/apic/x2apic_savic.c
index 2eab9a773005..5502a828a795 100644
--- a/arch/x86/kernel/apic/x2apic_savic.c
+++ b/arch/x86/kernel/apic/x2apic_savic.c
@@ -183,7 +183,7 @@ static void x2apic_savic_write(u32 reg, u32 data)
}
}
-static void send_ipi(int cpu, int vector)
+static void send_ipi(int cpu, int vector, bool nmi)
{
void *backing_page;
int reg_off;
@@ -195,16 +195,20 @@ static void send_ipi(int cpu, int vector)
* IRR updates such as during VMRUN and during CPU interrupt handling flow.
*/
test_and_set_bit(VEC_POS(vector), (unsigned long *)((char *)backing_page + reg_off));
+ if (nmi)
+ set_reg(backing_page, SAVIC_NMI_REQ_OFFSET, nmi);
}
static void send_ipi_dest(u64 icr_data)
{
int vector, cpu;
+ bool nmi;
vector = icr_data & APIC_VECTOR_MASK;
cpu = icr_data >> 32;
+ nmi = ((icr_data & APIC_DM_FIXED_MASK) == APIC_DM_NMI);
- send_ipi(cpu, vector);
+ send_ipi(cpu, vector, nmi);
}
static void send_ipi_target(u64 icr_data)
@@ -222,11 +226,13 @@ static void send_ipi_allbut(u64 icr_data)
const struct cpumask *self_cpu_mask = get_cpu_mask(smp_processor_id());
unsigned long flags;
int vector, cpu;
+ bool nmi;
vector = icr_data & APIC_VECTOR_MASK;
+ nmi = ((icr_data & APIC_DM_FIXED_MASK) == APIC_DM_NMI);
local_irq_save(flags);
for_each_cpu_andnot(cpu, cpu_present_mask, self_cpu_mask)
- send_ipi(cpu, vector);
+ send_ipi(cpu, vector, nmi);
write_msr_to_hv(APIC_ICR, icr_data);
local_irq_restore(flags);
}
--
2.34.1
