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KVM: SEV-ES: reduce ghcb_sa_len to 32 bits

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The size of the GHCB scratch area is limited to 16 KiB (GHCB_SCRATCH_AREA_LIMIT),
so there is no need for it to be a u64.  This fixes a build error on 32-bit
systems:

i686-linux-gnu-ld: arch/x86/kvm/svm/sev.o: in function `sev_es_string_io:
sev.c:(.text+0x110f): undefined reference to `__udivdi3'

Cc: stable@vger.kernel.org
Fixes: 019057bd73d1 ("KVM: SEV-ES: fix length of string I/O")
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2021-10-18 06:49:18 -04:00
parent d61863c66f
commit 9f1ee7b169
1 changed files with 1 additions and 1 deletions
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arch/x86/kvm/svm/svm.h
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@ -191,7 +191,7 @@ struct vcpu_svm {
/* SEV-ES scratch area support */
void *ghcb_sa;
u64 ghcb_sa_len;
u32 ghcb_sa_len;
bool ghcb_sa_sync;
bool ghcb_sa_free;