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ANDROID: KVM: arm64: s2mpu: Refactor DABT handler

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In preparation for adding more entries to the list of S2MPU registers
accessible to the host, refactor the code to use a switch instead of
a series of ifs. No functional change intended.

Bug: 190463801
Signed-off-by: David Brazdil <dbrazdil@google.com>
Change-Id: I70afa8f755d6d96916cdc1f813e6506e97e761c0
This commit is contained in:
David Brazdil
2022-04-21 11:00:33 +01:00
parent c43dfe89fe
commit 96767ad7be
1 changed files with 7 additions and 6 deletions
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13
arch/arm64/kvm/hyp/nvhe/iommu/s2mpu.c
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@@ -393,15 +393,16 @@ static u32 host_mmio_reg_access_mask(size_t off, bool is_write)
const u32 write_only = is_write ? read_write : no_access;
u32 masked_off;
/* IRQ handler can clear interrupts. */
if (off == REG_NS_INTERRUPT_CLEAR)
switch (off) {
/* Allow EL1 IRQ handler to clear interrupts. */
case REG_NS_INTERRUPT_CLEAR:
return write_only & ALL_VIDS_BITMAP;
/* IRQ handler can read bitmap of pending interrupts. */
if (off == REG_NS_FAULT_STATUS)
/* Allow EL1 IRQ handler to read bitmap of pending interrupts. */
case REG_NS_FAULT_STATUS:
return read_only & ALL_VIDS_BITMAP;
}
/* IRQ handler can read fault information. */
/* Allow EL1 IRQ handler to read fault information. */
masked_off = off & ~REG_NS_FAULT_VID_MASK;
if ((masked_off == REG_NS_FAULT_PA_LOW(0)) ||
(masked_off == REG_NS_FAULT_PA_HIGH(0)) ||