This reverts commit bc360b0b1611566e1bd47384daf49af6a1c51837.
This matches the hardware identifier of the Samsung 970 EVO Plus, a very
popular internal laptop NVMe drive, which is not the Samsung X5, an
external thunderbolt drive. In particular, this causes:
1) a 2.3 second boot time delay; and
2) disabling of deep power saving states.
So just revert this until whatever funny business can be worked out
regarding Samsung's PCI IDs.
Fixes: bc360b0b1611 ("nvme-pci: add quirks for Samsung X5 SSDs")
Cc: stable(a)vger.kernel.org
Cc: Monish Kumar R <monish.kumar.r(a)intel.com>
Signed-off-by: Jason A. Donenfeld <Jason(a)zx2c4.com>
---
drivers/nvme/host/pci.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 48f4f6eb877b..47b9e3e0ea5a 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -3483,10 +3483,7 @@ static const struct pci_device_id nvme_id_table[] = {
NVME_QUIRK_128_BYTES_SQES |
NVME_QUIRK_SHARED_TAGS |
NVME_QUIRK_SKIP_CID_GEN },
- { PCI_DEVICE(0x144d, 0xa808), /* Samsung X5 */
- .driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY|
- NVME_QUIRK_NO_DEEPEST_PS |
- NVME_QUIRK_IGNORE_DEV_SUBNQN, },
+
{ PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) },
{ 0, }
};
--
2.35.1
There are two issues in avic_kick_target_vcpus_fast
1. It is legal to issue an IPI request with APIC_DEST_NOSHORT
and a physical destination of 0xFF (or 0xFFFFFFFF in case of x2apic),
which must be treated as a broadcast destination.
Fix this by explicitly checking for it.
Also don’t use ‘index’ in this case as it gives no new information.
2. It is legal to issue a logical IPI request to more than one target.
Index field only provides index in physical id table of first
such target and therefore can't be used before we are sure
that only a single target was addressed.
Instead, parse the ICRL/ICRH, double check that a unicast interrupt
was requested, and use that info to figure out the physical id
of the target vCPU.
At that point there is no need to use the index field as well.
In addition to fixing the above issues, also skip the call to
kvm_apic_match_dest.
It is possible to do this now, because now as long as AVIC is not
inhibited, it is guaranteed that none of the vCPUs changed their
apic id from its default value.
This fixes boot of windows guest with AVIC enabled because it uses
IPI with 0xFF destination and no destination shorthand.
Fixes: 7223fd2d5338 ("KVM: SVM: Use target APIC ID to complete AVIC IRQs when possible")
Cc: stable(a)vger.kernel.org
Signed-off-by: Maxim Levitsky <mlevitsk(a)redhat.com>
---
arch/x86/kvm/svm/avic.c | 105 ++++++++++++++++++++++++++--------------
1 file changed, 69 insertions(+), 36 deletions(-)
diff --git a/arch/x86/kvm/svm/avic.c b/arch/x86/kvm/svm/avic.c
index 072e2c8cc66aa..5d98ac575dedc 100644
--- a/arch/x86/kvm/svm/avic.c
+++ b/arch/x86/kvm/svm/avic.c
@@ -291,58 +291,91 @@ void avic_ring_doorbell(struct kvm_vcpu *vcpu)
static int avic_kick_target_vcpus_fast(struct kvm *kvm, struct kvm_lapic *source,
u32 icrl, u32 icrh, u32 index)
{
- u32 dest, apic_id;
- struct kvm_vcpu *vcpu;
+ u32 l1_physical_id, dest;
+ struct kvm_vcpu *target_vcpu;
int dest_mode = icrl & APIC_DEST_MASK;
int shorthand = icrl & APIC_SHORT_MASK;
struct kvm_svm *kvm_svm = to_kvm_svm(kvm);
- u32 *avic_logical_id_table = page_address(kvm_svm->avic_logical_id_table_page);
if (shorthand != APIC_DEST_NOSHORT)
return -EINVAL;
- /*
- * The AVIC incomplete IPI #vmexit info provides index into
- * the physical APIC ID table, which can be used to derive
- * guest physical APIC ID.
- */
+ if (apic_x2apic_mode(source))
+ dest = icrh;
+ else
+ dest = GET_APIC_DEST_FIELD(icrh);
+
if (dest_mode == APIC_DEST_PHYSICAL) {
- apic_id = index;
+ /* broadcast destination, use slow path */
+ if (apic_x2apic_mode(source) && dest == X2APIC_BROADCAST)
+ return -EINVAL;
+ if (!apic_x2apic_mode(source) && dest == APIC_BROADCAST)
+ return -EINVAL;
+
+ l1_physical_id = dest;
+
+ if (WARN_ON_ONCE(l1_physical_id != index))
+ return -EINVAL;
+
} else {
- if (!apic_x2apic_mode(source)) {
- /* For xAPIC logical mode, the index is for logical APIC table. */
- apic_id = avic_logical_id_table[index] & 0x1ff;
+ u32 bitmap, cluster;
+ int logid_index;
+
+ if (apic_x2apic_mode(source)) {
+ /* 16 bit dest mask, 16 bit cluster id */
+ bitmap = dest & 0xFFFF0000;
+ cluster = (dest >> 16) << 4;
+ } else if (kvm_lapic_get_reg(source, APIC_DFR) == APIC_DFR_FLAT) {
+ /* 8 bit dest mask*/
+ bitmap = dest;
+ cluster = 0;
} else {
- return -EINVAL;
+ /* 4 bit desk mask, 4 bit cluster id */
+ bitmap = dest & 0xF;
+ cluster = (dest >> 4) << 2;
}
- }
- /*
- * Assuming vcpu ID is the same as physical apic ID,
- * and use it to retrieve the target vCPU.
- */
- vcpu = kvm_get_vcpu_by_id(kvm, apic_id);
- if (!vcpu)
- return -EINVAL;
+ if (unlikely(!bitmap))
+ /* guest bug: nobody to send the logical interrupt to */
+ return 0;
- if (apic_x2apic_mode(vcpu->arch.apic))
- dest = icrh;
- else
- dest = GET_APIC_DEST_FIELD(icrh);
+ if (!is_power_of_2(bitmap))
+ /* multiple logical destinations, use slow path */
+ return -EINVAL;
- /*
- * Try matching the destination APIC ID with the vCPU.
- */
- if (kvm_apic_match_dest(vcpu, source, shorthand, dest, dest_mode)) {
- vcpu->arch.apic->irr_pending = true;
- svm_complete_interrupt_delivery(vcpu,
- icrl & APIC_MODE_MASK,
- icrl & APIC_INT_LEVELTRIG,
- icrl & APIC_VECTOR_MASK);
- return 0;
+ logid_index = cluster + __ffs(bitmap);
+
+ if (apic_x2apic_mode(source)) {
+ l1_physical_id = logid_index;
+ } else {
+ u32 *avic_logical_id_table =
+ page_address(kvm_svm->avic_logical_id_table_page);
+
+ u32 logid_entry = avic_logical_id_table[logid_index];
+
+ if (WARN_ON_ONCE(index != logid_index))
+ return -EINVAL;
+
+ /* guest bug: non existing/reserved logical destination */
+ if (unlikely(!(logid_entry & AVIC_LOGICAL_ID_ENTRY_VALID_MASK)))
+ return 0;
+
+ l1_physical_id = logid_entry &
+ AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK;
+ }
}
- return -EINVAL;
+ target_vcpu = kvm_get_vcpu_by_id(kvm, l1_physical_id);
+ if (unlikely(!target_vcpu))
+ /* guest bug: non existing vCPU is a target of this IPI*/
+ return 0;
+
+ target_vcpu->arch.apic->irr_pending = true;
+ svm_complete_interrupt_delivery(target_vcpu,
+ icrl & APIC_MODE_MASK,
+ icrl & APIC_INT_LEVELTRIG,
+ icrl & APIC_VECTOR_MASK);
+ return 0;
}
static void avic_kick_target_vcpus(struct kvm *kvm, struct kvm_lapic *source,
--
2.26.3