From 1cfc9c4b9d4606a1e90e7dbc50058b9f0c1d43a6 Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Fri, 10 Dec 2021 16:36:22 +0000 Subject: KVM: x86/xen: Maintain valid mapping of Xen shared_info page Use the newly reinstated gfn_to_pfn_cache to maintain a kernel mapping of the Xen shared_info page so that it can be accessed in atomic context. Note that we do not participate in dirty tracking for the shared info page and we do not explicitly mark it dirty every single tim we deliver an event channel interrupts. We wouldn't want to do that even if we *did* have a valid vCPU context with which to do so. Signed-off-by: David Woodhouse Message-Id: <20211210163625.2886-4-dwmw2@infradead.org> Signed-off-by: Paolo Bonzini --- arch/x86/include/asm/kvm_host.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/x86/include/asm/kvm_host.h') diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index ce622b89c5d8..6e61e11e750f 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1020,7 +1020,7 @@ struct msr_bitmap_range { struct kvm_xen { bool long_mode; u8 upcall_vector; - gfn_t shinfo_gfn; + struct gfn_to_pfn_cache shinfo_cache; }; enum kvm_irqchip_mode { -- cgit v1.2.3