44 lines
1.4 KiB
Diff
44 lines
1.4 KiB
Diff
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From: "Singh, Brijesh" <brijesh.singh@amd.com>
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Date: Fri, 15 Feb 2019 14:24:21 -0700
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Subject: target/i386: sev: Do not pin the ram device memory region
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The RAM device presents a memory region that should be handled
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as an IO region and should not be pinned.
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In the case of the vfio-pci, RAM device represents a MMIO BAR
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and the memory region is not backed by pages hence
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KVM_MEMORY_ENCRYPT_REG_REGION fails to lock the memory range.
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Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1667249
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Cc: Alex Williamson <alex.williamson@redhat.com>
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Cc: Paolo Bonzini <pbonzini@redhat.com>
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Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
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[BSC#1123205]
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Signed-off-by: Bruce Rogers <brogers@suse.com>
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---
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target/i386/sev.c | 11 +++++++++++
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1 file changed, 11 insertions(+)
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diff --git a/target/i386/sev.c b/target/i386/sev.c
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index 2395171acf..7d6f4032d6 100644
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--- a/target/i386/sev.c
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+++ b/target/i386/sev.c
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@@ -130,6 +130,17 @@ sev_ram_block_added(RAMBlockNotifier *n, void *host, size_t size)
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{
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int r;
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struct kvm_enc_region range;
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+ ram_addr_t offset;
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+ MemoryRegion *mr;
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+
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+ /*
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+ * The RAM device presents a memory region that should be treated
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+ * as IO region and should not be pinned.
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+ */
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+ mr = memory_region_from_host(host, &offset);
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+ if (mr && memory_region_is_ram_device(mr)) {
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+ return;
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+ }
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range.addr = (__u64)(unsigned long)host;
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range.size = size;
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