From: Alexandre Chartre <alexandre.chartre@oracle.com>
To: pbonzini@redhat.com, rkrcmar@redhat.com, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de, hpa@zytor.com,
dave.hansen@linux.intel.com, luto@kernel.org,
peterz@infradead.org, kvm@vger.kernel.org, x86@kernel.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Cc: konrad.wilk@oracle.com, jan.setjeeilers@oracle.com,
liran.alon@oracle.com, jwadams@google.com,
alexandre.chartre@oracle.com
Subject: [RFC KVM 05/27] KVM: x86: Add handler to exit kvm isolation
Date: Mon, 13 May 2019 16:38:13 +0200 [thread overview]
Message-ID: <1557758315-12667-6-git-send-email-alexandre.chartre@oracle.com> (raw)
In-Reply-To: <1557758315-12667-1-git-send-email-alexandre.chartre@oracle.com>
From: Liran Alon <liran.alon@oracle.com>
Interrupt handlers will need this handler to switch from
the KVM address space back to the kernel address space
on their prelog.
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Alexandre Chartre <alexandre.chartre@oracle.com>
---
arch/x86/include/asm/irq.h | 1 +
arch/x86/kernel/irq.c | 11 +++++++++++
arch/x86/kvm/isolation.c | 13 +++++++++++++
3 files changed, 25 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/irq.h b/arch/x86/include/asm/irq.h
index 8f95686..eb32abc 100644
--- a/arch/x86/include/asm/irq.h
+++ b/arch/x86/include/asm/irq.h
@@ -29,6 +29,7 @@ static inline int irq_canonicalize(int irq)
extern __visible void smp_kvm_posted_intr_ipi(struct pt_regs *regs);
extern __visible void smp_kvm_posted_intr_wakeup_ipi(struct pt_regs *regs);
extern __visible void smp_kvm_posted_intr_nested_ipi(struct pt_regs *regs);
+extern void kvm_set_isolation_exit_handler(void (*handler)(void));
#endif
extern void (*x86_platform_ipi_callback)(void);
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 59b5f2e..e68483b 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -295,6 +295,17 @@ void kvm_set_posted_intr_wakeup_handler(void (*handler)(void))
}
EXPORT_SYMBOL_GPL(kvm_set_posted_intr_wakeup_handler);
+void (*kvm_isolation_exit_handler)(void) = dummy_handler;
+
+void kvm_set_isolation_exit_handler(void (*handler)(void))
+{
+ if (handler)
+ kvm_isolation_exit_handler = handler;
+ else
+ kvm_isolation_exit_handler = dummy_handler;
+}
+EXPORT_SYMBOL_GPL(kvm_set_isolation_exit_handler);
+
/*
* Handler for POSTED_INTERRUPT_VECTOR.
*/
diff --git a/arch/x86/kvm/isolation.c b/arch/x86/kvm/isolation.c
index 35aa659..22ff9c2 100644
--- a/arch/x86/kvm/isolation.c
+++ b/arch/x86/kvm/isolation.c
@@ -5,6 +5,7 @@
* KVM Address Space Isolation
*/
+#include <linux/kvm_host.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/printk.h>
@@ -95,6 +96,16 @@ static void kvm_isolation_uninit_mm(void)
free_pages((unsigned long)kvm_pgd, PGD_ALLOCATION_ORDER);
}
+static void kvm_isolation_set_handlers(void)
+{
+ kvm_set_isolation_exit_handler(kvm_isolation_exit);
+}
+
+static void kvm_isolation_clear_handlers(void)
+{
+ kvm_set_isolation_exit_handler(NULL);
+}
+
int kvm_isolation_init(void)
{
int r;
@@ -106,6 +117,7 @@ int kvm_isolation_init(void)
if (r)
return r;
+ kvm_isolation_set_handlers();
pr_info("KVM: x86: Running with isolated address space\n");
return 0;
@@ -116,6 +128,7 @@ void kvm_isolation_uninit(void)
if (!address_space_isolation)
return;
+ kvm_isolation_clear_handlers();
kvm_isolation_uninit_mm();
pr_info("KVM: x86: End of isolated address space\n");
}
--
1.7.1
next prev parent reply other threads:[~2019-05-13 14:41 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-13 14:38 [RFC KVM 00/27] KVM Address Space Isolation Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 01/27] kernel: Export memory-management symbols required for KVM address space isolation Alexandre Chartre
2019-05-13 15:15 ` Peter Zijlstra
2019-05-13 15:17 ` Liran Alon
2019-05-13 14:38 ` [RFC KVM 02/27] KVM: x86: Introduce address_space_isolation module parameter Alexandre Chartre
2019-05-13 15:46 ` Andy Lutomirski
2019-05-13 15:55 ` Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 03/27] KVM: x86: Introduce KVM separate virtual address space Alexandre Chartre
2019-05-13 15:45 ` Andy Lutomirski
2019-05-13 16:04 ` Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 04/27] KVM: x86: Switch to KVM address space on entry to guest Alexandre Chartre
2019-05-13 14:38 ` Alexandre Chartre [this message]
2019-05-13 15:49 ` [RFC KVM 05/27] KVM: x86: Add handler to exit kvm isolation Andy Lutomirski
2019-05-13 16:10 ` Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 06/27] KVM: x86: Exit KVM isolation on IRQ entry Alexandre Chartre
2019-05-13 15:51 ` Andy Lutomirski
2019-05-13 16:28 ` Alexandre Chartre
2019-05-13 18:13 ` Andy Lutomirski
2019-05-14 7:07 ` Peter Zijlstra
2019-05-14 7:58 ` Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 07/27] KVM: x86: Switch to host address space when may access sensitive data Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 08/27] KVM: x86: Optimize branches which checks if address space isolation enabled Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 09/27] kvm/isolation: function to track buffers allocated for the KVM page table Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 10/27] kvm/isolation: add KVM page table entry free functions Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 11/27] kvm/isolation: add KVM page table entry offset functions Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 12/27] kvm/isolation: add KVM page table entry allocation functions Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 13/27] kvm/isolation: add KVM page table entry set functions Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 14/27] kvm/isolation: functions to copy page table entries for a VA range Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 15/27] kvm/isolation: keep track of VA range mapped in KVM address space Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 16/27] kvm/isolation: functions to clear page table entries for a VA range Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 17/27] kvm/isolation: improve mapping copy when mapping is already present Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 18/27] kvm/isolation: function to copy page table entries for percpu buffer Alexandre Chartre
2019-05-13 18:18 ` Andy Lutomirski
2019-05-14 7:09 ` Peter Zijlstra
2019-05-14 8:25 ` Alexandre Chartre
2019-05-14 8:34 ` Andy Lutomirski
2019-05-14 9:41 ` Alexandre Chartre
2019-05-14 15:23 ` Andy Lutomirski
2019-05-14 16:24 ` Alexandre Chartre
2019-05-14 17:05 ` Peter Zijlstra
2019-05-14 18:09 ` Sean Christopherson
2019-05-14 20:33 ` Andy Lutomirski
2019-05-14 21:06 ` Sean Christopherson
2019-05-14 21:55 ` Andy Lutomirski
2019-05-14 22:38 ` Sean Christopherson
2019-05-18 0:05 ` Jonathan Adams
2019-05-14 20:27 ` Andy Lutomirski
2019-05-13 14:38 ` [RFC KVM 19/27] kvm/isolation: initialize the KVM page table with core mappings Alexandre Chartre
2019-05-13 15:50 ` Dave Hansen
2019-05-13 16:00 ` Andy Lutomirski
2019-05-13 17:00 ` Alexandre Chartre
2019-05-13 16:46 ` Sean Christopherson
2019-05-13 16:47 ` Alexandre Chartre
2019-05-14 10:26 ` Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 20/27] kvm/isolation: initialize the KVM page table with vmx specific data Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 21/27] kvm/isolation: initialize the KVM page table with vmx VM data Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 22/27] kvm/isolation: initialize the KVM page table with vmx cpu data Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 23/27] kvm/isolation: initialize the KVM page table with the vcpu tasks Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 24/27] kvm/isolation: KVM page fault handler Alexandre Chartre
2019-05-13 15:15 ` Peter Zijlstra
2019-05-13 21:25 ` Liran Alon
2019-05-14 2:02 ` Andy Lutomirski
2019-05-14 7:21 ` Peter Zijlstra
2019-05-14 15:36 ` Alexandre Chartre
2019-05-14 15:43 ` Andy Lutomirski
2019-05-13 16:02 ` Andy Lutomirski
2019-05-13 16:21 ` Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 25/27] kvm/isolation: implement actual KVM isolation enter/exit Alexandre Chartre
2019-05-13 15:16 ` Peter Zijlstra
2019-05-13 16:01 ` Andy Lutomirski
2019-05-13 14:38 ` [RFC KVM 26/27] kvm/isolation: initialize the KVM page table with KVM memslots Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 27/27] kvm/isolation: initialize the KVM page table with KVM buses Alexandre Chartre
2019-05-13 16:42 ` [RFC KVM 00/27] KVM Address Space Isolation Liran Alon
2019-05-13 18:17 ` Andy Lutomirski
2019-05-13 21:08 ` Liran Alon
2019-05-14 2:07 ` Andy Lutomirski
2019-05-14 7:37 ` Peter Zijlstra
2019-05-14 21:32 ` Jan Setje-Eilers
2019-05-14 8:05 ` Liran Alon
2019-05-14 7:29 ` Peter Zijlstra
2019-05-14 7:57 ` Liran Alon
2019-05-14 8:33 ` Alexandre Chartre
2019-05-13 19:31 ` Nakajima, Jun
2019-05-13 21:16 ` Liran Alon
[not found] ` <D07C8F51-F2DF-4C8B-AB3B-0DFABD5F4C33@intel.com>
2019-05-13 21:53 ` Liran Alon
2019-05-15 12:52 ` Alexandre Chartre
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