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| author | Marc Zyngier <maz@kernel.org> | 2023-08-15 21:38:47 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2023-08-17 12:00:27 +0300 |
| commit | e930694e6145eb210c9931914a7801cc61016a82 (patch) | |
| tree | 4bdeee3024caa9d5cdb40ae1eb4c99acf1816643 /arch/arm64/include | |
| parent | 50d2fe4648c50e7d33fa576f6b078f22ad973670 (diff) | |
| download | linux-e930694e6145eb210c9931914a7801cc61016a82.tar.xz | |
KVM: arm64: Restructure FGT register switching
As we're about to majorly extend the handling of FGT registers,
restructure the code to actually save/restore the registers
as required. This is made easy thanks to the previous addition
of the EL2 registers, allowing us to use the host context for
this purpose.
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230815183903.2735724-14-maz@kernel.org
Diffstat (limited to 'arch/arm64/include')
| -rw-r--r-- | arch/arm64/include/asm/kvm_arm.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 028049b147df..85908aa18908 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -333,6 +333,27 @@ BIT(18) | \ GENMASK(16, 15)) +/* + * FGT register definitions + * + * RES0 and polarity masks as of DDI0487J.a, to be updated as needed. + * We're not using the generated masks as they are usually ahead of + * the published ARM ARM, which we use as a reference. + * + * Once we get to a point where the two describe the same thing, we'll + * merge the definitions. One day. + */ +#define __HFGRTR_EL2_RES0 (GENMASK(63, 56) | GENMASK(53, 51)) +#define __HFGRTR_EL2_MASK GENMASK(49, 0) +#define __HFGRTR_EL2_nMASK (GENMASK(55, 54) | BIT(50)) + +#define __HFGWTR_EL2_RES0 (GENMASK(63, 56) | GENMASK(53, 51) | \ + BIT(46) | BIT(42) | BIT(40) | BIT(28) | \ + GENMASK(26, 25) | BIT(21) | BIT(18) | \ + GENMASK(15, 14) | GENMASK(10, 9) | BIT(2)) +#define __HFGWTR_EL2_MASK GENMASK(49, 0) +#define __HFGWTR_EL2_nMASK (GENMASK(55, 54) | BIT(50)) + /* Hyp Prefetch Fault Address Register (HPFAR/HDFAR) */ #define HPFAR_MASK (~UL(0xf)) /* |