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KVM: arm/arm64: Add kvm_ras.h to collect kvm specific RAS plumbing

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To split up APEIs in_nmi() path, the caller needs to always be
in_nmi(). KVM shouldn't have to know about this, pull the RAS plumbing
out into a header file.

Currently guest synchronous external aborts are claimed as RAS
notifications by handle_guest_sea(), which is hidden in the arch codes
mm/fault.c. 32bit gets a dummy declaration in system_misc.h.

There is going to be more of this in the future if/when the kernel
supports the SError-based firmware-first notification mechanism and/or
kernel-first notifications for both synchronous external abort and
SError. Each of these will come with some Kconfig symbols and a
handful of header files.

Create a header file for all this.

This patch gives handle_guest_sea() a 'kvm_' prefix, and moves the
declarations to kvm_ras.h as preparation for a future patch that moves
the ACPI-specific RAS code out of mm/fault.c.

Signed-off-by: James Morse <[email protected]>
Reviewed-by: Punit Agrawal <[email protected]>
Acked-by: Marc Zyngier <[email protected]>
Tested-by: Tyler Baicar <[email protected]>
Acked-by: Catalin Marinas <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
James Morse 2019-01-29 18:48:49 +00:00 • committed by Rafael J. Wysocki
commit 0db5e02230
6 changed files with 28 additions and 10 deletions
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4
virt/kvm/arm/mmu.c
View file

@ -27,10 +27,10 @@
#include <asm/kvm_arm.h>
#include <asm/kvm_mmu.h>
#include <asm/kvm_mmio.h>
#include <asm/kvm_ras.h>
#include <asm/kvm_asm.h>
#include <asm/kvm_emulate.h>
#include <asm/virt.h>
#include <asm/system_misc.h>
#include "trace.h"
@ -1903,7 +1903,7 @@ int kvm_handle_guest_abort(struct kvm_vcpu *vcpu, struct kvm_run *run)
* For RAS the host kernel may handle this abort.
* There is no need to pass the error into the guest.
*/
if (!handle_guest_sea(fault_ipa, kvm_vcpu_get_hsr(vcpu)))
if (!kvm_handle_guest_sea(fault_ipa, kvm_vcpu_get_hsr(vcpu)))
return 1;
if (unlikely(!is_iabt)) {