From: Michael Jeanson <mjeanson@efficios.com>
Date: Mon, 26 Oct 2020 18:28:35 +0000 (-0400)
Subject: fix: kvm: x86/mmu: Add TDP MMU PF handler (v5.10)
X-Git-Tag: v2.12.4~8
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=e30866f96b3ab02639f429e4bd34e59b3a336579;p=lttng-modules.git

fix: kvm: x86/mmu: Add TDP MMU PF handler (v5.10)

See upstream commit :

  commit bb18842e21111a979e2e0e1c5d85c09646f18d51
  Author: Ben Gardon <bgardon@google.com>
  Date:   Wed Oct 14 11:26:50 2020 -0700

    kvm: x86/mmu: Add TDP MMU PF handler

    Add functions to handle page faults in the TDP MMU. These page faults
    are currently handled in much the same way as the x86 shadow paging
    based MMU, however the ordering of some operations is slightly
    different. Future patches will add eager NX splitting, a fast page fault
    handler, and parallel page faults.

    Tested by running kvm-unit-tests and KVM selftests on an Intel Haswell
    machine. This series introduced no new failures.

Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ie56959cb6c77913d2f1188b0ca15da9114623a4e
---

diff --git a/instrumentation/events/lttng-module/arch/x86/kvm/mmutrace.h b/instrumentation/events/lttng-module/arch/x86/kvm/mmutrace.h
index e5470400..86717835 100644
--- a/instrumentation/events/lttng-module/arch/x86/kvm/mmutrace.h
+++ b/instrumentation/events/lttng-module/arch/x86/kvm/mmutrace.h
@@ -163,7 +163,25 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE(kvm_mmu_page_class, kvm_mmu_prepare_zap_page,
 	TP_ARGS(sp)
 )
 
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,11,0))
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,10,0))
+
+LTTNG_TRACEPOINT_EVENT_MAP(
+	mark_mmio_spte,
+
+	kvm_mmu_mark_mmio_spte,
+
+	TP_PROTO(u64 *sptep, gfn_t gfn, u64 spte),
+	TP_ARGS(sptep, gfn, spte),
+
+	TP_FIELDS(
+		ctf_integer_hex(void *, sptep, sptep)
+		ctf_integer(gfn_t, gfn, gfn)
+		ctf_integer(unsigned, access, spte & ACC_ALL)
+		ctf_integer(unsigned int, gen, get_mmio_spte_generation(spte))
+	)
+)
+
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,11,0))
 
 LTTNG_TRACEPOINT_EVENT_MAP(
 	mark_mmio_spte,
diff --git a/probes/lttng-probe-kvm-x86-mmu.c b/probes/lttng-probe-kvm-x86-mmu.c
index 8f981865..5043c776 100644
--- a/probes/lttng-probe-kvm-x86-mmu.c
+++ b/probes/lttng-probe-kvm-x86-mmu.c
@@ -31,6 +31,11 @@
 #include <../../arch/x86/kvm/mmutrace.h>
 #endif
 
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,10,0))
+#include <../arch/x86/kvm/mmu.h>
+#include <../arch/x86/kvm/mmu/spte.h>
+#endif
+
 #undef TRACE_INCLUDE_PATH
 #undef TRACE_INCLUDE_FILE