From: Bharata B Rao <bharata@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: kvm-ppc@vger.kernel.org, linux-mm@kvack.org, paulus@au1.ibm.com,
aneesh.kumar@linux.vnet.ibm.com, jglisse@redhat.com,
linuxram@us.ibm.com, sukadev@linux.vnet.ibm.com,
cclaudio@linux.ibm.com, hch@lst.de,
Bharata B Rao <bharata@linux.ibm.com>,
Paul Mackerras <paulus@ozlabs.org>
Subject: [PATCH v6 4/7] kvmppc: Handle memory plug/unplug to secure VM
Date: Fri, 9 Aug 2019 14:11:05 +0530 [thread overview]
Message-ID: <20190809084108.30343-5-bharata@linux.ibm.com> (raw)
In-Reply-To: <20190809084108.30343-1-bharata@linux.ibm.com>
Register the new memslot with UV during plug and unregister
the memslot during unplug.
Signed-off-by: Bharata B Rao <bharata@linux.ibm.com>
Acked-by: Paul Mackerras <paulus@ozlabs.org>
---
arch/powerpc/include/asm/ultravisor-api.h | 1 +
arch/powerpc/include/asm/ultravisor.h | 5 +++++
arch/powerpc/kvm/book3s_hv.c | 19 +++++++++++++++++++
3 files changed, 25 insertions(+)
diff --git a/arch/powerpc/include/asm/ultravisor-api.h b/arch/powerpc/include/asm/ultravisor-api.h
index c578d9b13a56..46b1ee381695 100644
--- a/arch/powerpc/include/asm/ultravisor-api.h
+++ b/arch/powerpc/include/asm/ultravisor-api.h
@@ -26,6 +26,7 @@
#define UV_WRITE_PATE 0xF104
#define UV_RETURN 0xF11C
#define UV_REGISTER_MEM_SLOT 0xF120
+#define UV_UNREGISTER_MEM_SLOT 0xF124
#define UV_PAGE_IN 0xF128
#define UV_PAGE_OUT 0xF12C
diff --git a/arch/powerpc/include/asm/ultravisor.h b/arch/powerpc/include/asm/ultravisor.h
index 8a722c575c56..79c415bf5ee8 100644
--- a/arch/powerpc/include/asm/ultravisor.h
+++ b/arch/powerpc/include/asm/ultravisor.h
@@ -40,4 +40,9 @@ static inline int uv_register_mem_slot(u64 lpid, u64 start_gpa, u64 size,
size, flags, slotid);
}
+static inline int uv_unregister_mem_slot(u64 lpid, u64 slotid)
+{
+ return ucall_norets(UV_UNREGISTER_MEM_SLOT, lpid, slotid);
+}
+
#endif /* _ASM_POWERPC_ULTRAVISOR_H */
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 33b8ebffbef0..13e31ef3583e 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -74,6 +74,7 @@
#include <asm/hw_breakpoint.h>
#include <asm/kvm_host.h>
#include <asm/kvm_book3s_devm.h>
+#include <asm/ultravisor.h>
#include "book3s.h"
@@ -4504,6 +4505,24 @@ static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm,
if (change == KVM_MR_FLAGS_ONLY && kvm_is_radix(kvm) &&
((new->flags ^ old->flags) & KVM_MEM_LOG_DIRTY_PAGES))
kvmppc_radix_flush_memslot(kvm, old);
+ /*
+ * If UV hasn't yet called H_SVM_INIT_START, don't register memslots.
+ */
+ if (!kvm->arch.secure_guest)
+ return;
+
+ /*
+ * TODO: Handle KVM_MR_MOVE
+ */
+ if (change == KVM_MR_CREATE) {
+ uv_register_mem_slot(kvm->arch.lpid,
+ new->base_gfn << PAGE_SHIFT,
+ new->npages * PAGE_SIZE,
+ 0,
+ new->id);
+ } else if (change == KVM_MR_DELETE) {
+ uv_unregister_mem_slot(kvm->arch.lpid, old->id);
+ }
}
/*
--
2.21.0
next prev parent reply other threads:[~2019-08-09 8:41 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-09 8:41 [PATCH v6 0/7] KVMPPC driver to manage secure guest pages Bharata B Rao
2019-08-09 8:41 ` [PATCH v6 1/7] kvmppc: Driver to manage pages of secure guest Bharata B Rao
2019-08-10 10:58 ` Christoph Hellwig
2019-08-10 14:21 ` Bharata B Rao
2019-08-20 3:04 ` Thiago Jung Bauermann
2019-08-22 3:29 ` Bharata B Rao
2019-08-20 6:22 ` Suraj Jitindar Singh
2019-08-20 6:44 ` Bharata B Rao
2019-08-09 8:41 ` [PATCH v6 2/7] kvmppc: Shared pages support for secure guests Bharata B Rao
2019-08-09 8:41 ` [PATCH v6 3/7] kvmppc: H_SVM_INIT_START and H_SVM_INIT_DONE hcalls Bharata B Rao
2019-08-09 8:41 ` Bharata B Rao [this message]
2019-08-09 8:41 ` [PATCH v6 5/7] kvmppc: Radix changes for secure guest Bharata B Rao
2019-08-09 8:41 ` [PATCH v6 6/7] kvmppc: Support reset of " Bharata B Rao
2019-08-09 8:41 ` [PATCH v6 7/7] KVM: PPC: Ultravisor: Add PPC_UV config option Bharata B Rao
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